G-protein coupled receptor [Rattus norvegicus]
Protein Classification
G protein-coupled receptor family protein( domain architecture ID 705710)
G protein-coupled receptor family protein is a seven-transmembrane G protein-coupled receptor (7TM-GPCR) family protein which typically transmits an extracellular signal into the cell by the conformational rearrangement of the 7TM helices and by the subsequent binding and activation of an intracellular heterotrimeric G protein; GPCR ligands include light-sensitive compounds, odors, pheromones, hormones, and neurotransmitters
List of domain hits
| Name | Accession | Description | Interval | E-value | |||||
| 7tm_GPCRs super family | cl28897 | seven-transmembrane G protein-coupled receptor superfamily; This hierarchical evolutionary ... |
45-310 | 3.26e-135 | |||||
seven-transmembrane G protein-coupled receptor superfamily; This hierarchical evolutionary model represents the seven-transmembrane (7TM) receptors, often referred to as G protein-coupled receptors (GPCRs), which transmit physiological signals from the outside of the cell to the inside via G proteins. GPCRs constitute the largest known superfamily of transmembrane receptors across the three kingdoms of life that respond to a wide variety of extracellular stimuli including peptides, lipids, neurotransmitters, amino acids, hormones, and sensory stimuli such as light, smell and taste. All GPCRs share a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. However, some 7TM receptors, such as the type 1 microbial rhodopsins, do not activate G proteins. Based on sequence similarity, GPCRs can be divided into six major classes: class A (the rhodopsin-like family), class B (the Methuselah-like, adhesion and secretin-like receptor family), class C (the metabotropic glutamate receptor family), class D (the fungal mating pheromone receptors), class E (the cAMP receptor family), and class F (the frizzled/smoothened receptor family). Nearly 800 human GPCR genes have been identified and are involved essentially in all major physiological processes. Approximately 40% of clinically marketed drugs mediate their effects through modulation of GPCR function for the treatment of a variety of human diseases including bacterial infections. The actual alignment was detected with superfamily member cd15961: Pssm-ID: 475119 [Multi-domain] Cd Length: 268 Bit Score: 384.38 E-value: 3.26e-135
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| Name | Accession | Description | Interval | E-value | |||||
| 7tmA_GPR12 | cd15961 | G protein-coupled receptor 12, member of the class A family of seven-transmembrane G ... |
45-310 | 3.26e-135 | |||||
G protein-coupled receptor 12, member of the class A family of seven-transmembrane G protein-coupled receptors; GPR3, GPR6, and GPR12 form a subfamily of constitutively active G-protein coupled receptors with dual coupling to G(s) and G(i) proteins. These three orphan receptors are involved in the regulation of cell proliferation and survival, neurite outgrowth, cell clustering, and maintenance of meiotic prophase arrest. They constitutively activate adenylate cyclase to a similar degree as that seen with fully activated G(s)-coupled receptors, and are also able to constitutively activate inhibitory G(i/o) proteins. Lysophospholipids such as sphingosine 1-phosphate (S1P) and sphingosylphosphorylcholine have been detected as the high-affinity ligands for Gpr6 and Gpr12, respectively, which show high sequence homology with GPR3. Pssm-ID: 320627 [Multi-domain] Cd Length: 268 Bit Score: 384.38 E-value: 3.26e-135
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| 7tm_1 | pfam00001 | 7 transmembrane receptor (rhodopsin family); This family contains, amongst other ... |
61-300 | 2.25e-14 | |||||
7 transmembrane receptor (rhodopsin family); This family contains, amongst other G-protein-coupled receptors (GCPRs), members of the opsin family, which have been considered to be typical members of the rhodopsin superfamily. They share several motifs, mainly the seven transmembrane helices, GCPRs of the rhodopsin superfamily. All opsins bind a chromophore, such as 11-cis-retinal. The function of most opsins other than the photoisomerases is split into two steps: light absorption and G-protein activation. Photoisomerases, on the other hand, are not coupled to G-proteins - they are thought to generate and supply the chromophore that is used by visual opsins. Pssm-ID: 459624 [Multi-domain] Cd Length: 256 Bit Score: 71.56 E-value: 2.25e-14
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| Name | Accession | Description | Interval | E-value | |||||
| 7tmA_GPR12 | cd15961 | G protein-coupled receptor 12, member of the class A family of seven-transmembrane G ... |
45-310 | 3.26e-135 | |||||
G protein-coupled receptor 12, member of the class A family of seven-transmembrane G protein-coupled receptors; GPR3, GPR6, and GPR12 form a subfamily of constitutively active G-protein coupled receptors with dual coupling to G(s) and G(i) proteins. These three orphan receptors are involved in the regulation of cell proliferation and survival, neurite outgrowth, cell clustering, and maintenance of meiotic prophase arrest. They constitutively activate adenylate cyclase to a similar degree as that seen with fully activated G(s)-coupled receptors, and are also able to constitutively activate inhibitory G(i/o) proteins. Lysophospholipids such as sphingosine 1-phosphate (S1P) and sphingosylphosphorylcholine have been detected as the high-affinity ligands for Gpr6 and Gpr12, respectively, which show high sequence homology with GPR3. Pssm-ID: 320627 [Multi-domain] Cd Length: 268 Bit Score: 384.38 E-value: 3.26e-135
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| 7tmA_GPR3_GPR6_GPR12-like | cd15100 | G protein-coupled receptors 3, 6, 12, and related proteins, member of the class A family of ... |
45-310 | 7.92e-125 | |||||
G protein-coupled receptors 3, 6, 12, and related proteins, member of the class A family of seven-transmembrane G protein-coupled receptors; GPR3, GPR6, and GPR12 form a subfamily of constitutively active G-protein coupled receptors with dual coupling to G(s) and G(i) proteins. These three orphan receptors are involved in the regulation of cell proliferation and survival, neurite outgrowth, cell clustering, and maintenance of meiotic prophase arrest. They constitutively activate adenylate cyclase to a similar degree as that seen with fully activated G(s)-coupled receptors, and are also able to constitutively activate inhibitory G(i/o) proteins. Lysophospholipids such as sphingosine 1-phosphate (S1P) and sphingosylphosphorylcholine have been detected as the high-affinity ligands for Gpr6 and Gpr12, respectively, which show high sequence homology with GPR3. Also included in this subfamily is GPRx, also known as GPR185, which involved in the maintenance of meiotic arrest in frog oocytes. Pssm-ID: 320228 [Multi-domain] Cd Length: 268 Bit Score: 357.94 E-value: 7.92e-125
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| 7tmA_GPR6 | cd15962 | G protein-coupled receptor 6, member of the class A family of seven-transmembrane G ... |
45-310 | 5.20e-106 | |||||
G protein-coupled receptor 6, member of the class A family of seven-transmembrane G protein-coupled receptors; GPR3, GPR6, and GPR12 form a subfamily of constitutively active G-protein coupled receptors with dual coupling to G(s) and G(i) proteins. These three orphan receptors are involved in the regulation of cell proliferation and survival, neurite outgrowth, cell clustering, and maintenance of meiotic prophase arrest. They constitutively activate adenylate cyclase to a similar degree as that seen with fully activated G(s)-coupled receptors, and are also able to constitutively activate inhibitory G(i/o) proteins. Lysophospholipids such as sphingosine 1-phosphate (S1P) and sphingosylphosphorylcholine have been detected as the high-affinity ligands for Gpr6 and Gpr12, respectively, which show high sequence homology with GPR3. Pssm-ID: 320628 [Multi-domain] Cd Length: 268 Bit Score: 310.32 E-value: 5.20e-106
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| 7tmA_GPR3 | cd15963 | G protein-coupled receptor 3, member of the class A family of seven-transmembrane G ... |
45-309 | 5.14e-104 | |||||
G protein-coupled receptor 3, member of the class A family of seven-transmembrane G protein-coupled receptors; GPR3, GPR6, and GPR12 form a subfamily of constitutively active G-protein coupled receptors with dual coupling to G(s) and G(i) proteins. These three orphan receptors are involved in the regulation of cell proliferation and survival, neurite outgrowth, cell clustering, and maintenance of meiotic prophase arrest. They constitutively activate adenylate cyclase to a similar degree as that seen with fully activated G(s)-coupled receptors, and are also able to constitutively activate inhibitory G(i/o) proteins. Lysophospholipids such as sphingosine 1-phosphate (S1P) and sphingosylphosphorylcholine have been detected as the high-affinity ligands for Gpr6 and Gpr12, respectively, which show high sequence homology with GPR3. Pssm-ID: 320629 [Multi-domain] Cd Length: 268 Bit Score: 305.27 E-value: 5.14e-104
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| 7tmA_GPR185-like | cd15960 | G protein-coupled receptor 185 and similar proteins, member of the class A family of ... |
45-310 | 1.17e-97 | |||||
G protein-coupled receptor 185 and similar proteins, member of the class A family of seven-transmembrane G protein-coupled receptors; GPR185, also called GPRx, is a member of the constitutively active GPR3/6/12 subfamily of G protein-coupled receptors. It plays a role in the maintenance of meiotic arrest in Xenopus laevis oocytes through G(s) protein, which leads to increased cAMP levels. In Xenopus laevis, GPR185 is primarily expressed in brain, ovary, and testis; however, its ortholog has not been identified in other vertebrate genomes. GPR3, GPR6, and GPR12 form a subfamily of constitutively active G-protein coupled receptors with dual coupling to G(s) and G(i) proteins. These three orphan receptors are involved in the regulation of cell proliferation and survival, neurite outgrowth, cell clustering, and maintenance of meiotic prophase arrest. Pssm-ID: 320626 [Multi-domain] Cd Length: 268 Bit Score: 289.10 E-value: 1.17e-97
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| 7tmA_EDG-like | cd14972 | endothelial differentiation gene family, member of the class A family of seven-transmembrane G ... |
47-310 | 3.60e-43 | |||||
endothelial differentiation gene family, member of the class A family of seven-transmembrane G protein-coupled receptors; This group represents the endothelial differentiation gene (Edg) family of G-protein coupled receptors, melanocortin/ACTH receptors, and cannabinoid receptors as well as their closely related receptors. The Edg GPCRs bind blood borne lysophospholipids including sphingosine-1-phosphate (S1P) and lysophosphatidic acid (LPA), which are involved in the regulation of cell proliferation, survival, migration, invasion, endothelial cell shape change and cytoskeletal remodeling. The Edg receptors are classified into two subfamilies: the lysophosphatidic acid subfamily that includes LPA1 (Edg2), LPA2 (Edg4), and LPA3 (Edg7); and the S1P subfamily that includes S1P1 (Edg1), S1P2 (Edg5), S1P3 (Edg3), S1P4 (Edg6), and S1P5 (Edg8). Melanocortin receptors bind a group of pituitary peptide hormones known as melanocortins, which include adrenocorticotropic hormone (ACTH) and the different isoforms of melanocyte-stimulating hormones. Two types of cannabinoid receptors, CB1 and CB2, are activated by naturally occurring endocannabinoids, cannabis plant-derived cannabinoids such as tetrahydrocannabinol, or synthetic cannabinoids. The CB receptors are involved in the various physiological processes such as appetite, mood, memory, and pain sensation. CB1 receptor is expressed predominantly in central and peripheral neurons, while CB2 receptor is found mainly in the immune system. Pssm-ID: 341317 [Multi-domain] Cd Length: 275 Bit Score: 149.75 E-value: 3.60e-43
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| 7tmA_amine_R-like | cd14967 | amine receptors and similar proteins, member of the class A family of seven-transmembrane G ... |
125-310 | 3.69e-20 | |||||
amine receptors and similar proteins, member of the class A family of seven-transmembrane G protein-coupled receptors; Amine receptors of the class A family of GPCRs include adrenoceptors, 5-HT (serotonin) receptors, muscarinic cholinergic receptors, dopamine receptors, histamine receptors, and trace amine receptors. The receptors of amine subfamily are major therapeutic targets for the treatment of neurological disorders and psychiatric diseases. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320098 [Multi-domain] Cd Length: 259 Bit Score: 88.00 E-value: 3.69e-20
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| 7tmA_MC1R | cd15351 | melanocortin receptor subtype 1, member of the class A family of seven-transmembrane G ... |
61-309 | 1.88e-19 | |||||
melanocortin receptor subtype 1, member of the class A family of seven-transmembrane G protein-coupled receptors; The melanocortin receptor (MCR) subfamily is a member of the class A family of seven-transmembrane G-protein coupled receptors. MCRs bind a group of pituitary peptide hormones known as melanocortins, which include adrenocorticotropic hormone (ACTH) and the different isoforms of melanocyte-stimulating hormones. There are five known subtypes of the MCR subfamily. MC1R is involved in regulating skin pigmentation and hair color. ACTH (adrenocorticotropic hormone) is the only endogenous ligand for MC2R, which shows low sequence similarity with other melanocortin receptors. Mutations in MC2R cause familial glucocorticoid deficiency type 1, in which patients have elevated plasma ACTH and low cortisol levels. MC3R is expressed in many parts of the brain and peripheral tissues and involved in the regulation of energy homeostasis. MC4R is expressed primarily in the central nervous system and involved in both eating behavior and sexual function. MC5R is widely expressed in peripheral tissues and is mainly involved in the regulation of exocrine gland function. Pssm-ID: 320473 [Multi-domain] Cd Length: 271 Bit Score: 86.38 E-value: 1.88e-19
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| 7tmA_MCR | cd15103 | melanocortin receptors, member of the class A family of seven-transmembrane G protein-coupled ... |
61-310 | 2.49e-19 | |||||
melanocortin receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; The melanocortin receptor (MCR) subfamily is a member of the class A family of seven-transmembrane G-protein coupled receptors. MCRs bind a group of pituitary peptide hormones known as melanocortins, which include adrenocorticotropic hormone (ACTH) and the different isoforms of melanocyte-stimulating hormones. There are five known subtypes of the MCR subfamily. MC1R is involved in regulating skin pigmentation and hair color. ACTH (adrenocorticotropic hormone) is the only endogenous ligand for MC2R, which shows low sequence similarity with other melanocortin receptors. Mutations in MC2R cause familial glucocorticoid deficiency type 1, in which patients have elevated plasma ACTH and low cortisol levels. MC3R is expressed in many parts of the brain and peripheral tissues and involved in the regulation of energy homeostasis. MC4R is expressed primarily in the central nervous system and involved in both eating behavior and sexual function. MC5R is widely expressed in peripheral tissues and is mainly involved in the regulation of exocrine gland function. Pssm-ID: 320231 [Multi-domain] Cd Length: 270 Bit Score: 86.00 E-value: 2.49e-19
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| 7tm_classA_rhodopsin-like | cd00637 | rhodopsin receptor-like class A family of the seven-transmembrane G protein-coupled receptor ... |
49-304 | 6.93e-19 | |||||
rhodopsin receptor-like class A family of the seven-transmembrane G protein-coupled receptor superfamily; Class A rhodopsin-like receptors constitute about 90% of all GPCRs. The class A GPCRs include the light-sensitive rhodopsin as well as receptors for biogenic amines, lipids, nucleotides, odorants, peptide hormones, and a variety of other ligands. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Based on sequence similarity, GPCRs can be divided into six major classes: class A (rhodopsin-like family), class B (Methuselah-like, adhesion and secretin-like receptor family), class C (metabotropic glutamate receptor family), class D (fungal mating pheromone receptors), class E (cAMP receptor family), and class F (frizzled/smoothened receptor family). Nearly 800 human GPCR genes have been identified and are involved essentially in all major physiological processes. Approximately 40% of clinically marketed drugs mediate their effects through modulation of GPCR function for the treatment of a variety of human diseases including bacterial infections. Pssm-ID: 410626 [Multi-domain] Cd Length: 275 Bit Score: 84.65 E-value: 6.93e-19
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| 7tmA_MC5R | cd15354 | melanocortin receptor subtype 5, member of the class A family of seven-transmembrane G ... |
50-309 | 3.22e-16 | |||||
melanocortin receptor subtype 5, member of the class A family of seven-transmembrane G protein-coupled receptors; The melanocortin receptor (MCR) subfamily is a member of the class A family of seven-transmembrane G-protein coupled receptors. MCRs bind a group of pituitary peptide hormones known as melanocortins, which include adrenocorticotropic hormone (ACTH) and the different isoforms of melanocyte-stimulating hormones. There are five known subtypes of the MCR subfamily. MC1R is involved in regulating skin pigmentation and hair color. ACTH (adrenocorticotropic hormone) is the only endogenous ligand for MC2R, which shows low sequence similarity with other melanocortin receptors. Mutations in MC2R cause familial glucocorticoid deficiency type 1, in which patients have elevated plasma ACTH and low cortisol levels. MC3R is expressed in many parts of the brain and peripheral tissues and involved in the regulation of energy homeostasis. MC4R is expressed primarily in the central nervous system and involved in both eating behavior and sexual function. MC5R is widely expressed in peripheral tissues and is mainly involved in the regulation of exocrine gland function. Pssm-ID: 320476 [Multi-domain] Cd Length: 270 Bit Score: 77.28 E-value: 3.22e-16
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| 7tmA_MC4R | cd15353 | melanocortin receptor subtype 4, member of the class A family of seven-transmembrane G ... |
50-309 | 3.79e-16 | |||||
melanocortin receptor subtype 4, member of the class A family of seven-transmembrane G protein-coupled receptors; The melanocortin receptor (MCR) subfamily is a member of the class A family of seven-transmembrane G-protein coupled receptors. MCRs bind a group of pituitary peptide hormones known as melanocortins, which include adrenocorticotropic hormone (ACTH) and the different isoforms of melanocyte-stimulating hormones. There are five known subtypes of the MCR subfamily. MC1R is involved in regulating skin pigmentation and hair color. ACTH (adrenocorticotropic hormone) is the only endogenous ligand for MC2R, which shows low sequence similarity with other melanocortin receptors. Mutations in MC2R cause familial glucocorticoid deficiency type 1, in which patients have elevated plasma ACTH and low cortisol levels. MC3R is expressed in many parts of the brain and peripheral tissues and involved in the regulation of energy homeostasis. MC4R is expressed primarily in the central nervous system and involved in both eating behavior and sexual function. MC5R is widely expressed in peripheral tissues and is mainly involved in the regulation of exocrine gland function. Pssm-ID: 320475 [Multi-domain] Cd Length: 269 Bit Score: 76.87 E-value: 3.79e-16
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| 7tmA_tyramine_R-like | cd15061 | tyramine receptors and similar proteins, member of the class A family of seven-transmembrane G ... |
125-310 | 5.87e-16 | |||||
tyramine receptors and similar proteins, member of the class A family of seven-transmembrane G protein-coupled receptors; This group includes tyramine-specific receptors and similar proteins found in insects and other invertebrates. These tyramine receptors form a distinct receptor family that is phylogenetically different from the other tyramine/octopamine receptors which also found in invertebrates. Both octopamine and tyramine mediate their actions via G protein-coupled receptors (GPCRs) and are the invertebrate equivalent of vertebrate adrenergic neurotransmitters. In Drosophila, octopamine is involved in ovulation by mediating an egg release from the ovary, while a physiological role for tyramine in this process is not fully understood. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320189 [Multi-domain] Cd Length: 256 Bit Score: 76.24 E-value: 5.87e-16
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| 7tmA_MC2R_ACTH_R | cd15350 | melanocortin receptor subtype 2, also called adrenocorticotropic hormone receptor, member of ... |
61-310 | 1.31e-14 | |||||
melanocortin receptor subtype 2, also called adrenocorticotropic hormone receptor, member of the class A family of seven-transmembrane G protein-coupled receptors; The melanocortin receptor (MCR) subfamily is a member of the class A family of seven-transmembrane G-protein coupled receptors. MCRs bind a group of pituitary peptide hormones known as melanocortins, which include adrenocorticotropic hormone (ACTH) and the different isoforms of melanocyte-stimulating hormones. There are five known subtypes of the MCR subfamily. MC1R is involved in regulating skin pigmentation and hair color. ACTH (adrenocorticotropic hormone) is the only endogenous ligand for MC2R, which shows low sequence similarity with other melanocortin receptors. Mutations in MC2R cause familial glucocorticoid deficiency type 1, in which patients have elevated plasma ACTH and low cortisol levels. MC3R is expressed in many parts of the brain and peripheral tissues and involved in the regulation of energy homeostasis. MC4R is expressed primarily in the central nervous system and involved in both eating behavior and sexual function. MC5R is widely expressed in peripheral tissues and is mainly involved in the regulation of exocrine gland function. Pssm-ID: 320472 [Multi-domain] Cd Length: 270 Bit Score: 72.51 E-value: 1.31e-14
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| 7tm_1 | pfam00001 | 7 transmembrane receptor (rhodopsin family); This family contains, amongst other ... |
61-300 | 2.25e-14 | |||||
7 transmembrane receptor (rhodopsin family); This family contains, amongst other G-protein-coupled receptors (GCPRs), members of the opsin family, which have been considered to be typical members of the rhodopsin superfamily. They share several motifs, mainly the seven transmembrane helices, GCPRs of the rhodopsin superfamily. All opsins bind a chromophore, such as 11-cis-retinal. The function of most opsins other than the photoisomerases is split into two steps: light absorption and G-protein activation. Photoisomerases, on the other hand, are not coupled to G-proteins - they are thought to generate and supply the chromophore that is used by visual opsins. Pssm-ID: 459624 [Multi-domain] Cd Length: 256 Bit Score: 71.56 E-value: 2.25e-14
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| 7tmA_Adenosine_R | cd14968 | adenosine receptor subfamily, member of the class A family of seven-transmembrane G ... |
126-310 | 2.35e-14 | |||||
adenosine receptor subfamily, member of the class A family of seven-transmembrane G protein-coupled receptors; The adenosine receptors (or P1 receptors), a family of G protein-coupled purinergic receptors, bind adenosine as their endogenous ligand. There are four types of adenosine receptors in human, designated as A1, A2A, A2B, and A3. Each type is encoded by a different gene and has distinct functions with some overlap. For example, both A1 and A2A receptors are involved in regulating myocardial oxygen consumption and coronary blood flow in the heart, while the A2A receptor also has a broad spectrum of anti-inflammatory effects in the body. These two receptors also expressed in the brain, where they have important roles in the release of other neurotransmitters such as dopamine and glutamate, while the A2B and A3 receptors found primarily in the periphery and play important roles in inflammation and immune responses. The A1 and A3 receptors preferentially interact with G proteins of the G(i/o) family, thereby lowering the intracellular cAMP levels, whereas the A2A and A2B receptors interact with G proteins of the G(s) family, activating adenylate cyclase to elevate cAMP levels. Pssm-ID: 341316 [Multi-domain] Cd Length: 285 Bit Score: 71.90 E-value: 2.35e-14
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| 7tmA_MC3R | cd15352 | melanocortin receptor subtype 3, member of the class A family of seven-transmembrane G ... |
50-309 | 6.05e-13 | |||||
melanocortin receptor subtype 3, member of the class A family of seven-transmembrane G protein-coupled receptors; The melanocortin receptor (MCR) subfamily is a member of the class A family of seven-transmembrane G-protein coupled receptors. MCRs bind a group of pituitary peptide hormones known as melanocortins, which include adrenocorticotropic hormone (ACTH) and the different isoforms of melanocyte-stimulating hormones. There are five known subtypes of the MCR subfamily. MC1R is involved in regulating skin pigmentation and hair color. ACTH (adrenocorticotropic hormone) is the only endogenous ligand for MC2R, which shows low sequence similarity with other melanocortin receptors. Mutations in MC2R cause familial glucocorticoid deficiency type 1, in which patients have elevated plasma ACTH and low cortisol levels. MC3R is expressed in many parts of the brain and peripheral tissues and involved in the regulation of energy homeostasis. MC4R is expressed primarily in the central nervous system and involved in both eating behavior and sexual function. MC5R is widely expressed in peripheral tissues and is mainly involved in the regulation of exocrine gland function. Pssm-ID: 320474 [Multi-domain] Cd Length: 272 Bit Score: 67.61 E-value: 6.05e-13
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| 7tmA_TAAR1 | cd15314 | trace amine-associated receptor 1 and similar receptors, member of the class A family of ... |
125-302 | 3.14e-12 | |||||
trace amine-associated receptor 1 and similar receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; The trace amine-associated receptor 1 (TAAR1) is one of the 15 identified trace amine-associated receptor subtypes, which form a distinct subfamily within the class A G protein-coupled receptor family. Trace amines are endogenous amines of unknown function that have strong structural and metabolic similarity to classical monoamine neurotransmitters (serotonin, noradrenaline, adrenaline, dopamine, and histamine), which play critical roles in human and animal physiological activities such as cognition, consciousness, mood, motivation, perception, and autonomic responses. However, trace amines are found in the mammalian brain at very low concentrations compared to classical monoamines. TAAR1 is coupled to the Gs protein, which leads to activation of adenylate cyclase, and is thought to play functional role in the regulation of brain monoamines. TAAR1 is also shown to be activated by psychoactive compounds such as Ecstasy (MDMA), amphetamine and LSD. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320438 [Multi-domain] Cd Length: 282 Bit Score: 65.73 E-value: 3.14e-12
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| 7tmA_CB2 | cd15341 | cannabinoid receptor subtype 2, member of the class A family of seven-transmembrane G ... |
50-310 | 5.08e-12 | |||||
cannabinoid receptor subtype 2, member of the class A family of seven-transmembrane G protein-coupled receptors; Cannabinoid receptors belong to the class A G-protein coupled receptor superfamily. Two types of cannabinoid receptors, CB1 and CB2, have been identified so far. They are activated by naturally occurring endocannabinoids, cannabis plant-derived cannabinoids such as tetrahydrocannabinol, or synthetic cannabinoids. The CB receptors are involved in the various physiological processes such as appetite, mood, memory, and pain sensation. CB1 receptor is expressed predominantly in central and peripheral neurons, while CB2 receptor is found mainly in the immune system. Pssm-ID: 320463 [Multi-domain] Cd Length: 279 Bit Score: 65.24 E-value: 5.08e-12
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| 7tmA_5-HT7 | cd15329 | serotonin receptor subtype 7, member of the class A family of seven-transmembrane G ... |
126-309 | 1.46e-11 | |||||
serotonin receptor subtype 7, member of the class A family of seven-transmembrane G protein-coupled receptors; The 5-HT7 receptor, one of 14 mammalian serotonin receptors, is a member of the class A of GPCRs and is activated by the neurotransmitter serotonin (5-hydroxytryptamine, 5-HT). 5-HT7 receptor mainly couples to Gs protein, which positively stimulates adenylate cyclase, leading to increased intracellular cAMP formation and calcium influx. 5-HT7 receptor is expressed in various human tissues, mainly in the brain, the lower gastrointestinal tract and in vital blood vessels including the coronary artery. In the CNS, serotonin is involved in the regulation of appetite, mood, sleep, cognition, learning and memory, as well as implicated in neurologic disorders such as migraine, schizophrenia, and depression. Pssm-ID: 320452 [Multi-domain] Cd Length: 260 Bit Score: 63.44 E-value: 1.46e-11
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| 7tmA_Ap5-HTB1-like | cd15065 | serotonin receptor subtypes B1 and B2 from Aplysia californica and similar proteins; member of ... |
126-310 | 1.69e-11 | |||||
serotonin receptor subtypes B1 and B2 from Aplysia californica and similar proteins; member of the class A family of seven-transmembrane G protein-coupled receptors; This subfamily includes Aplysia californica serotonin receptors Ap5-HTB1 and Ap5-HTB2, and similar proteins from bilateria including insects, mollusks, annelids, and worms. Ap5-HTB1 is one of the several different receptors for 5-hydroxytryptamine (5HT, serotonin). In Aplysia, serotonin plays important roles in a variety of behavioral and physiological processes mediated by the central nervous system. These include circadian clock, feeding, locomotor movement, cognition and memory, synaptic growth and synaptic plasticity. Both Ap5-HTB1 and Ap5-HTB2 receptors are coupled to G-proteins that stimulate phospholipase C, leading to the activation of phosphoinositide metabolism. Ap5-HTB1 is expressed in the reproductive system, whereas Ap5-HTB2 is expressed in the central nervous system. Pssm-ID: 320193 [Multi-domain] Cd Length: 300 Bit Score: 63.91 E-value: 1.69e-11
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| 7tmA_D1-like_dopamine_R | cd15057 | D1-like family of dopamine receptors, member of the class A family of seven-transmembrane G ... |
125-310 | 1.79e-11 | |||||
D1-like family of dopamine receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; Dopamine receptors are members of the class A G protein-coupled receptors that are involved in many neurological processes in the central nervous system (CNS). The neurotransmitter dopamine is the primary endogenous agonist for dopamine receptors. Dopamine receptors consist of at least five subtypes: D1, D2, D3, D4, and D5. The D1 and D5 subtypes are members of the D1-like family of dopamine receptors, whereas the D2, D3 and D4 subtypes are members of the D2-like family. The D1-like family receptors are coupled to G proteins of the G(s) family, which activate adenylate cyclase, causing cAMP formation and activation of protein kinase A. In contrast, activation of D2-like family receptors is linked to G proteins of the G(i) family, which inhibit adenylate cyclase. Dopamine receptors are major therapeutic targets for neurological and psychiatric disorders such as drug abuse, depression, schizophrenia, or Parkinson's disease. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320185 [Multi-domain] Cd Length: 299 Bit Score: 63.60 E-value: 1.79e-11
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| 7tmA_Cannabinoid_R | cd15099 | cannabinoid receptors, member of the class A family of seven-transmembrane G protein-coupled ... |
50-310 | 6.09e-11 | |||||
cannabinoid receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; Cannabinoid receptors belong to the class A G-protein coupled receptor superfamily. Two types of cannabinoid receptors, CB1 and CB2, have been identified so far. They are activated by naturally occurring endocannabinoids, cannabis plant-derived cannabinoids such as tetrahydrocannabinol, or synthetic cannabinoids. The CB receptors are involved in the various physiological processes such as appetite, mood, memory, and pain sensation. CB1 receptor is expressed predominantly in central and peripheral neurons, while CB2 receptor is found mainly in the immune system. Pssm-ID: 320227 [Multi-domain] Cd Length: 281 Bit Score: 62.16 E-value: 6.09e-11
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| 7tmA_S1PR5_Edg8 | cd15348 | sphingosine-1-phosphate receptor subtype 5 (S1PR5 or S1P5), also called endothelial ... |
57-310 | 1.52e-10 | |||||
sphingosine-1-phosphate receptor subtype 5 (S1PR5 or S1P5), also called endothelial differentiation gene 8 (Edg8), member of the class A family of seven-transmembrane G protein-coupled receptors; The endothelial differentiation gene (Edg) family of G-protein coupled receptors binds blood borne lysophospholipids including sphingosine-1-phosphate (S1P) and lysophosphatidic acid (LPA), which are involved in the regulation of cell proliferation, survival, migration, invasion, endothelial cell shape change and cytoskeletal remodeling. The Edg receptors are classified into two subfamilies: the lysophosphatidic acid subfamily that includes LPA1 (Edg2), LPA2 (Edg4), and LPA3 (Edg7); and the S1P subfamily that includes S1P1 (Edg1), S1P2 (Edg5), S1P3 (Edg3), S1P4 (Edg6), and S1P5 (Edg8). The Edg receptors couple and activate at least three different G protein subtypes including G(i/o), G(q/11), and G(12/13). Pssm-ID: 320470 [Multi-domain] Cd Length: 277 Bit Score: 60.61 E-value: 1.52e-10
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| 7tmA_GPR119_R_insulinotropic_receptor | cd15104 | G protein-coupled receptor 119, also called glucose-dependent insulinotropic receptor, member ... |
114-310 | 4.22e-10 | |||||
G protein-coupled receptor 119, also called glucose-dependent insulinotropic receptor, member of the class A family of seven-transmembrane G protein-coupled receptors; GPR119 is activated by oleoylethanolamide (OEA), a naturally occurring bioactive lipid with hypophagic and anti-obesity effects. Immunohistochemistry and double-immunofluorescence studies revealed the predominant GPR119 localization in pancreatic polypeptide (PP)-cells of islets. In addition, GPR119 expression is elevated in islets of obese hyperglycemic mice as compared to control islets, suggesting a possible involvement of this receptor in the development of obesity and diabetes. GPR119 has a significant sequence similarity with the members of the endothelial differentiation gene family. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320232 [Multi-domain] Cd Length: 283 Bit Score: 59.69 E-value: 4.22e-10
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| 7tmA_5-HT1_5_7 | cd15064 | serotonin receptor subtypes 1, 5 and 7, member of the class A family of seven-transmembrane G ... |
117-310 | 6.11e-10 | |||||
serotonin receptor subtypes 1, 5 and 7, member of the class A family of seven-transmembrane G protein-coupled receptors; This group includes serotonin receptor subtypes 1, 5, and 7 that are activated by the neurotransmitter serotonin. The 5-HT1 and 5-HT5 receptors mediate inhibitory neurotransmission by coupling to G proteins of the G(i/o) family. The 5-HT1 receptor subfamily includes 5-HT1A, 5-HT1B, 5-HT1D, 5-HT1E, and 5-HT1F. There is no 5-HT1C receptor subtype, as it has been reclassified as 5-HT2C receptor. The 5-HT5A and 5-HT5B receptors have been cloned from rat and mouse, but only the 5-HT5A isoform has been identified in human because of the presence of premature stop codons in the human 5-HT5B gene, which prevents a functional receptor from being expressed. The 5-HT7 receptor is coupled to Gs, which positively stimulates adenylate cyclase activity, leading to increased intracellular cAMP formation and calcium influx. In the CNS, serotonin is involved in the regulation of appetite, mood, sleep, cognition, learning and memory, as well as implicated in neurologic disorders such as migraine, schizophrenia, and depression. Pssm-ID: 320192 [Multi-domain] Cd Length: 258 Bit Score: 58.88 E-value: 6.11e-10
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| 7tmA_LPAR2_Edg4 | cd15342 | lysophosphatidic acid receptor subtype 2 (LPAR2 or LPA2), also called Endothelial ... |
109-309 | 7.60e-10 | |||||
lysophosphatidic acid receptor subtype 2 (LPAR2 or LPA2), also called Endothelial differentiation gene 4 (Edg4), member of the class A family of seven-transmembrane G protein-coupled receptors; The endothelial differentiation gene (Edg) family of G-protein coupled receptors binds blood borne lysophospholipids including sphingosine-1-phosphate (S1P) and lysophosphatidic acid (LPA), which are involved in the regulation of cell proliferation, survival, migration, invasion, endothelial cell shape change and cytoskeletal remodeling. The Edg receptors are classified into two subfamilies: the lysophosphatidic acid subfamily that includes LPA1 (Edg2), LPA2 (Edg4), and LPA3 (Edg7); and the S1P subfamily that includes S1P1 (Edg1), S1P2 (Edg5), S1P3 (Edg3), S1P4 (Edg6), and S1P5 (Edg8). The Edg receptors couple and activate at least three different G protein subtypes including G(i/o), G(q/11), and G(12/13). Pssm-ID: 320464 [Multi-domain] Cd Length: 274 Bit Score: 58.66 E-value: 7.60e-10
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| 7tmA_Histamine_H2R | cd15051 | histamine subtype H2 receptor, member of the class A family of seven-transmembrane G ... |
125-310 | 7.74e-10 | |||||
histamine subtype H2 receptor, member of the class A family of seven-transmembrane G protein-coupled receptors; This group includes histamine receptor subtype H2R, a member of histamine receptor family, which belongs to the class A of GPCRs. Histamine plays a key role as chemical mediator and neurotransmitter in various physiological and pathophysiological processes in the central and peripheral nervous system. Histamine exerts its functions by binding to four different G protein-coupled receptors (H1-H4). The H2R subtype selectively interacts with the G(s)-type G protein that activates adenylate cyclase, leading to increased cAMP production and activation of Protein Kinase A. H2R is found in various tissues such as the brain, stomach, and heart. Its most prominent role is in histamine-induced gastric acid secretion. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320179 [Multi-domain] Cd Length: 287 Bit Score: 58.88 E-value: 7.74e-10
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| 7tmA_mAChR | cd15049 | muscarinic acetylcholine receptor subfamily, member of the class A family of ... |
126-310 | 2.76e-09 | |||||
muscarinic acetylcholine receptor subfamily, member of the class A family of seven-transmembrane G protein-coupled receptors; Muscarinic acetylcholine receptors (mAChRs) regulate the activity of many fundamental central and peripheral functions. The mAChR family consists of 5 subtypes M1-M5, which can be further divided into two major groups according to their G-protein coupling preference. The M1, M3 and M5 receptors selectively interact with G proteins of the G(q/11) family, whereas the M2 and M4 receptors preferentially link to the G(i/o) types of G proteins. Activation of mAChRs by agonist (acetylcholine) leads to a variety of biochemical and electrophysiological responses. In general, the exact nature of these responses and the subsequent physiological effects mainly depend on the molecular and pharmacological identity of the activated receptor subtype(s). All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 341322 [Multi-domain] Cd Length: 262 Bit Score: 56.94 E-value: 2.76e-09
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| 7tmA_CCKR-like | cd14993 | cholecystokinin receptors and related proteins, member of the class A family of ... |
123-310 | 4.83e-09 | |||||
cholecystokinin receptors and related proteins, member of the class A family of seven-transmembrane G protein-coupled receptors; This group represents four G-protein coupled receptors that are members of the RFamide receptor family, including cholecystokinin receptors (CCK-AR and CCK-BR), orexin receptors (OXR), neuropeptide FF receptors (NPFFR), and pyroglutamylated RFamide peptide receptor (QRFPR). These RFamide receptors are activated by their endogenous peptide ligands that share a common C-terminal arginine (R) and an amidated phenylanine (F) motif. CCK-AR (type A, alimentary; also known as CCK1R) is found abundantly on pancreatic acinar cells and binds only sulfated CCK-peptides with very high affinity, whereas CCK-BR (type B, brain; also known as CCK2R), the predominant form in the brain and stomach, binds CCK or gastrin and discriminates poorly between sulfated and non-sulfated peptides. CCK is implicated in regulation of digestion, appetite control, and body weight, and is involved in neurogenesis via CCK-AR. There is some evidence to support that CCK and gastrin, via their receptors, are involved in promoting cancer development and progression, acting as growth and invasion factors. Orexins (OXs; also referred to as hypocretins) are neuropeptide hormones that regulate the sleep-wake cycle and potently influence homeostatic systems regulating appetite and feeding behavior or modulating emotional responses such as anxiety or panic. OXs are synthesized as prepro-orexin (PPO) in the hypothalamus and then proteolytically cleaved into two forms of isoforms: orexin-A (OX-A) and orexin-B (OX-B). OXA is a 33 amino-acid peptide with N-terminal pyroglutamyl residue and two intramolecular disulfide bonds, whereas OXB is a 28 amino-acid linear peptide with no disulfide bonds. OX-A binds orexin receptor 1 (OX1R) with high-affinity, but also binds with somewhat low-affinity to OX2R, and signals primarily to Gq coupling, whereas OX-B shows a strong preference for the orexin receptor 2 (OX2R) and signals through Gq or Gi/o coupling. The 26RFa, also known as QRFP (Pyroglutamylated RFamide peptide), is a 26-amino acid residue peptide that exerts similar orexigenic activity including the regulation of feeding behavior in mammals. It is the ligand for G-protein coupled receptor 103 (GPR103), which is predominantly expressed in paraventricular (PVN) and ventromedial (VMH) nuclei of the hypothalamus. GPR103 shares significant protein sequence homology with orexin receptors (OX1R and OX2R), which have recently shown to produce a neuroprotective effect in Alzheimer's disease by forming a functional heterodimer with GPR103. Neuropeptide FF (NPFF) is a mammalian octapeptide that has been implicated in a wide range of physiological functions in the brain including pain sensitivity, insulin release, food intake, memory, blood pressure, and opioid-induced tolerance and hyperalgesia. The effects of NPFF are mediated through neuropeptide FF1 and FF2 receptors (NPFF1-R and NPFF2-R) which are predominantly expressed in the brain. NPFF induces pro-nociceptive effects, mainly through the NPFF1-R, and anti-nociceptive effects, mainly through the NPFF2-R. Pssm-ID: 320124 [Multi-domain] Cd Length: 296 Bit Score: 56.45 E-value: 4.83e-09
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| 7tmA_alpha1A_AR | cd15325 | alpha-1 adrenergic receptors subtype A, member of the class A family of seven-transmembrane G ... |
125-310 | 5.04e-09 | |||||
alpha-1 adrenergic receptors subtype A, member of the class A family of seven-transmembrane G protein-coupled receptors; The alpha-1 adrenergic receptors (or adrenoceptors) are a subfamily of the class A rhodopsin-like GPCRs that share a common architecture of seven transmembrane helices. This subfamily consists of three highly homologous receptor subtypes that primarily mediate smooth muscle contraction: alpha-1A, alpha-1B, and alpha-1D. Activation of alpha-1 receptors by catecholamines such as norepinephrine and epinephrine couples to the G(q) protein, which then activates the phospholipase C pathway, leading to an increase in IP3 and calcium. Consequently, the elevation of intracellular calcium concentration leads to vasoconstriction in smooth muscle of blood vessels. In addition, activation of alpha-1 receptors by phenylpropanolamine (PPA) produces anorexia and may induce appetite suppression in rats. Pssm-ID: 320448 [Multi-domain] Cd Length: 261 Bit Score: 56.05 E-value: 5.04e-09
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| 7tmA_DmOct-betaAR-like | cd15066 | Drosophila melanogaster beta-adrenergic receptor-like octopamine receptors and similar ... |
125-310 | 9.56e-09 | |||||
Drosophila melanogaster beta-adrenergic receptor-like octopamine receptors and similar receptors in bilateria; member of the class A family of seven-transmembrane G protein-coupled receptors; This group includes Drosophila beta-adrenergic-like octopamine receptors and similar proteins. The biogenic amine octopamine is the invertebrate equivalent of vertebrate adrenergic neurotransmitters and exerts its effects through different G protein-coupled receptor types. Insect octopamine receptors are involved in the modulation of carbohydrate metabolism, muscular tension, cognition and memory. The activation of octopamine receptors mediating these actions leads to an increase in adenylate cyclase activity, thereby increasing cAMP levels. In Drosophila melanogaster, three subgroups have been classified on the basis of their structural homology and functional equivalents with vertebrate beta-adrenergic receptors: DmOctBeta1R, DmOctBeta2R, and DmOctBeta3R. Pssm-ID: 320194 [Multi-domain] Cd Length: 265 Bit Score: 55.46 E-value: 9.56e-09
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| 7tmA_TAAR2_3_4 | cd15312 | trace amine-associated receptors 2, 3, 4, and similar receptors, member of the class A family ... |
203-310 | 1.59e-08 | |||||
trace amine-associated receptors 2, 3, 4, and similar receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; TAAR2, TAAR3, and TAAR4 are among the 15 identified trace amine-associated receptor subtypes, which form a distinct subfamily within the class A G protein-coupled receptor family. Trace amines are endogenous amines of unknown function that have strong structural and metabolic similarity to classical monoamine neurotransmitters (serotonin, noradrenaline, adrenaline, dopamine, and histamine), which play critical roles in human and animal physiological activities such as cognition, consciousness, mood, motivation, perception, and autonomic responses. However, trace amines are found in the mammalian brain at very low concentrations compared to classical monoamines. Trace amines, including p-tyramine, beta-phenylethylamine, and tryptamine, are also thought to act as chemical messengers to exert their biological effects in vertebrates. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320437 [Multi-domain] Cd Length: 289 Bit Score: 54.67 E-value: 1.59e-08
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| 7tmA_CB1 | cd15340 | cannabinoid receptor subtype 1, member of the class A family of seven-transmembrane G ... |
55-310 | 1.63e-08 | |||||
cannabinoid receptor subtype 1, member of the class A family of seven-transmembrane G protein-coupled receptors; Cannabinoid receptors belong to the class A G-protein coupled receptor superfamily. Two types of cannabinoid receptors, CB1 and CB2, have been identified so far. They are activated by naturally occurring endocannabinoids, cannabis plant-derived cannabinoids such as tetrahydrocannabinol, or synthetic cannabinoids. The CB receptors are involved in the various physiological processes such as appetite, mood, memory, and pain sensation. CB1 receptor is expressed predominantly in central and peripheral neurons, while CB2 receptor is found mainly in the immune system. Pssm-ID: 320462 [Multi-domain] Cd Length: 292 Bit Score: 54.92 E-value: 1.63e-08
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| 7tmA_D2-like_dopamine_R | cd15053 | D2-like dopamine receptors, member of the class A family of seven-transmembrane G ... |
117-310 | 1.89e-08 | |||||
D2-like dopamine receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; Dopamine receptors are members of the class A G protein-coupled receptors that are involved in many neurological processes in the central nervous system (CNS). The neurotransmitter dopamine is the primary endogenous agonist for dopamine receptors. Dopamine receptors consist of at least five subtypes: D1, D2, D3, D4, and D5. The D1 and D5 subtypes are members of the D1-like family of dopamine receptors, whereas the D2, D3 and D4 subtypes are members of the D2-like family. The D1-like family receptors are coupled to G proteins of the G(s) family, which activate adenylate cyclase, causing cAMP formation and activation of protein kinase A. In contrast, activation of D2-like family receptors is linked to G proteins of the G(i) family, which inhibit adenylate cyclase. Dopamine receptors are major therapeutic targets for neurological and psychiatric disorders such as drug abuse, depression, schizophrenia, or Parkinson's disease. Pssm-ID: 320181 [Multi-domain] Cd Length: 263 Bit Score: 54.27 E-value: 1.89e-08
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| 7tmA_Adenosine_R_A2B | cd15069 | adenosine receptor subtype 2AB, member of the class A family of seven-transmembrane G ... |
126-308 | 2.04e-08 | |||||
adenosine receptor subtype 2AB, member of the class A family of seven-transmembrane G protein-coupled receptors; The A2B receptor, a member of the adenosine receptor family of G protein-coupled receptors, binds adenosine as its endogenous ligand and is involved in regulating myocardial oxygen consumption and coronary blood flow. High-affinity A2A and low-affinity A2B receptors are preferentially coupled to G proteins of the stimulatory (Gs) family, which lead to activation of adenylate cyclase and thereby increasing the intracellular cAMP levels. The A2A receptor activation protects against tissue injury and acts as anti-inflammatory agent. In human skin endothelial cells, activation of A2B receptor, but not the A2A receptor, promotes angiogenesis. Alternatively, activated A2A receptor, but not the A2B receptor, promotes angiogenesis in human umbilical vein and lung microvascular endothelial cells. The A2A receptor alters cardiac contractility indirectly by modulating the anti-adrenergic effect of A1 receptor, while the A2B receptor exerts direct effects on cardiac contractile function, but does not modulate beta-adrenergic or A1 anti-adrenergic effects. Pssm-ID: 320197 [Multi-domain] Cd Length: 294 Bit Score: 54.55 E-value: 2.04e-08
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| 7tmA_TAAR5-like | cd15317 | trace amine-associated receptor 5 and similar receptors, member of the class A family of ... |
202-310 | 4.71e-08 | |||||
trace amine-associated receptor 5 and similar receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; Included in this group are mammalian TAAR5, TAAR6, TAAR8, TAAR9, and similar proteins. They are among the 15 identified trace amine-associated receptors (TAARs), a distinct subfamily within the class A G protein-coupled receptors. Trace amines are endogenous amines of unknown function that have strong structural and metabolic similarity to classical monoamine neurotransmitters (serotonin, noradrenaline, adrenaline, dopamine, and histamine), which play critical roles in human and animal physiological activities such as cognition, consciousness, mood, motivation, perception, and autonomic responses. However, trace amines are found in the mammalian brain at very low concentrations compared to classical monoamines. Trace amines, including p-tyramine, beta-phenylethylamine, and tryptamine, are also thought to act as chemical messengers to exert their biological effects in vertebrates. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320440 [Multi-domain] Cd Length: 290 Bit Score: 53.61 E-value: 4.71e-08
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| 7tmA_TAARs | cd15055 | trace amine-associated receptors, member of the class A family of seven-transmembrane G ... |
49-310 | 5.56e-08 | |||||
trace amine-associated receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; The trace amine-associated receptors (TAARs) are a distinct subfamily within the class A G protein-coupled receptor family. Trace amines are endogenous amines of unknown function that have strong structural and metabolic similarity to classical monoamine neurotransmitters (serotonin, noradrenaline, adrenaline, dopamine, and histamine), which play critical roles in human and animal physiological activities such as cognition, consciousness, mood, motivation, perception, and autonomic responses. However, trace amines are found in the mammalian brain at very low concentrations compared to classical monoamines. Trace amines, including p-tyramine, beta-phenylethylamine, and tryptamine, are also thought to act as chemical messengers to exert their biological effects in vertebrates. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320183 [Multi-domain] Cd Length: 285 Bit Score: 53.33 E-value: 5.56e-08
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| 7tmA_Histamine_H3R_H4R | cd15048 | histamine receptor subtypes H3R and H4R, member of the class A family of seven-transmembrane G ... |
125-310 | 7.33e-08 | |||||
histamine receptor subtypes H3R and H4R, member of the class A family of seven-transmembrane G protein-coupled receptors; This group includes histamine subtypes H3R and H4R, members of the histamine receptor family, which belong to the class A of GPCRs. Histamine plays a key role as chemical mediator and neurotransmitter in various physiological and pathophysiological processes in the central and peripheral nervous system. Histamine exerts its functions by binding to four different G protein-coupled receptors (H1-H4). The H3 and H4 receptors couple to the G(i)-proteins, which leading to the inhibition of cAMP formation. The H3R receptor functions as a presynaptic autoreceptors controlling histamine release and synthesis. The H4R plays an important role in histamine-mediated chemotaxis in mast cells and eosinophils. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320176 [Multi-domain] Cd Length: 296 Bit Score: 53.08 E-value: 7.33e-08
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| 7tmA_alpha2C_AR | cd15323 | alpha-2 adrenergic receptors subtype C, member of the class A family of seven-transmembrane G ... |
62-310 | 7.67e-08 | |||||
alpha-2 adrenergic receptors subtype C, member of the class A family of seven-transmembrane G protein-coupled receptors; The alpha-2 adrenergic receptors (or adrenoceptors) are a subfamily of the class A rhodopsin-like GPCRs that share a common architecture of seven transmembrane helices. This subfamily consists of three highly homologous receptor subtypes that have a key role in neurotransmitter release: alpha-2A, alpha-2B, and alpha-2C. In addition, a fourth subtype, alpha-2D is present in ray-finned fishes and amphibians, but is not found in humans. The alpha-2 receptors are found in both central and peripheral nervous system and serve to produce inhibitory functions through the G(i) proteins. Thus, the alpha-2 receptors inhibit adenylate cyclase, which decreases cAMP production and thereby decreases calcium influx during the action potential. Consequently, lowered levels of calcium will lead to a decrease in neurotransmitter release by negative feedback. Pssm-ID: 320446 [Multi-domain] Cd Length: 261 Bit Score: 52.63 E-value: 7.67e-08
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| 7tmA_5-HT1A_vertebrates | cd15330 | serotonin receptor subtype 1A from vertebrates, member of the class A family of ... |
117-310 | 1.29e-07 | |||||
serotonin receptor subtype 1A from vertebrates, member of the class A family of seven-transmembrane G protein-coupled receptors; The 5-HT1 receptors, one of 14 mammalian 5-HT receptors, is a member of the class A of GPCRs and is activated by the endogenous neurotransmitter and peripheral signal mediator serotonin (5-hydroxytryptamine, 5-HT). The 5-HT1 receptors mediate inhibitory neurotransmission by coupling to G proteins of the G(i/o) family, which lead to a decrease in adenylate cyclase activity, thereby decreasing intracellular cAMP levels and calcium influx. The 5-HT1 receptor subfamily includes 5 subtypes: 5-HT1A, 5-HT1B, 5-HT1D, 5-HT1E, and 5-HT1F. There is no 5-HT1C receptor subtype, as it has been reclassified as the 5-HT2C receptor. In the CNS, serotonin is involved in the regulation of appetite, mood, sleep, cognition, learning and memory, as well as implicated in neurologic disorders such as migraine, schizophrenia, and depression. Pssm-ID: 320453 [Multi-domain] Cd Length: 260 Bit Score: 51.90 E-value: 1.29e-07
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| 7tmA_alpha2B_AR | cd15321 | alpha-2 adrenergic receptors subtype B, member of the class A family of seven-transmembrane G ... |
62-310 | 1.41e-07 | |||||
alpha-2 adrenergic receptors subtype B, member of the class A family of seven-transmembrane G protein-coupled receptors; The alpha-2 adrenergic receptors (or adrenoceptors) are a subfamily of the class A rhodopsin-like GPCRs that share a common architecture of seven transmembrane helices. This subfamily consists of three highly homologous receptor subtypes that have a key role in neurotransmitter release: alpha-2A, alpha-2B, and alpha-2C. In addition, a fourth subtype, alpha-2D is present in ray-finned fishes and amphibians, but is not found in humans. The alpha-2 receptors are found in both central and peripheral nervous system and serve to produce inhibitory functions through the G(i) proteins. Thus, the alpha-2 receptors inhibit adenylate cyclase, which decreases cAMP production and thereby decreases calcium influx during the action potential. Consequently, lowered levels of calcium will lead to a decrease in neurotransmitter release by negative feedback. Pssm-ID: 320444 [Multi-domain] Cd Length: 268 Bit Score: 51.85 E-value: 1.41e-07
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| 7tmA_D3_dopamine_R | cd15310 | D3 subtype of the D2-like family of dopamine receptors, member of the class A family of ... |
115-310 | 1.78e-07 | |||||
D3 subtype of the D2-like family of dopamine receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; Dopamine receptors are members of the class A G protein-coupled receptors that are involved in many neurological processes in the central nervous system (CNS). The neurotransmitter dopamine is the primary endogenous agonist for dopamine receptors. Dopamine receptors consist of at least five subtypes: D1, D2, D3, D4, and D5. The D1 and D5 subtypes are members of the D1-like family of dopamine receptors, whereas the D2, D3 and D4 subtypes are members of the D2-like family. Activation of D2-like family receptors is linked to G proteins of the G(i) family. This leads to a decrease in adenylate cyclase activity, thereby decreasing cAMP levels. Dopamine receptors are major therapeutic targets for neurological and psychiatric disorders such as drug abuse, depression, schizophrenia, or Parkinson's disease. Pssm-ID: 320436 [Multi-domain] Cd Length: 259 Bit Score: 51.51 E-value: 1.78e-07
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| 7tmA_LPAR | cd15101 | lysophosphatidic acid receptor subfamily, member of the class A family of seven-transmembrane ... |
118-307 | 1.96e-07 | |||||
lysophosphatidic acid receptor subfamily, member of the class A family of seven-transmembrane G protein-coupled receptors; The endothelial differentiation gene (Edg) family of G-protein coupled receptors binds blood borne lysophospholipids including sphingosine-1-phosphate (S1P) and lysophosphatidic acid (LPA), which are involved in the regulation of cell proliferation, survival, migration, invasion, endothelial cell shape change and cytoskeletal remodeling. The Edg receptors are classified into two subfamilies: the lysophosphatidic acid subfamily that includes LPA1 (Edg2), LPA2 (Edg4), and LPA3 (Edg7); and the S1P subfamily that includes S1P1 (Edg1), S1P2 (Edg5), S1P3 (Edg3), S1P4 (Edg6), and S1P5 (Edg8). The Edg receptors couple and activate at least three different G protein subtypes including G(i/o), G(q/11), and G(12/13). Pssm-ID: 341325 [Multi-domain] Cd Length: 274 Bit Score: 51.36 E-value: 1.96e-07
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| 7tmA_5-HT1B_1D | cd15333 | serotonin receptor subtypes 1B and 1D, member of the class A family of seven-transmembrane G ... |
246-310 | 1.97e-07 | |||||
serotonin receptor subtypes 1B and 1D, member of the class A family of seven-transmembrane G protein-coupled receptors; The 5-HT1 receptors, one of 14 mammalian 5-HT receptors, is a member of the class A of GPCRs and is activated by the endogenous neurotransmitter and peripheral signal mediator serotonin (5-hydroxytryptamine, 5-HT). The 5-HT1 receptors mediate inhibitory neurotransmission by coupling to G proteins of the G(i/o) family, which lead to a decrease in adenylate cyclase activity, thereby decreasing intracellular cAMP levels and calcium influx. The 5-HT1 receptor subfamily includes 5 subtypes: 5-HT1A, 5-HT1B, 5-HT1D, 5-HT1E, and 5-HT1F. There is no 5-HT1C receptor subtype, as it has been reclassified as the 5-HT2C receptor. In the CNS, serotonin is involved in the regulation of appetite, mood, sleep, cognition, learning and memory, as well as implicated in neurologic disorders such as migraine, schizophrenia, and depression. Pssm-ID: 320455 [Multi-domain] Cd Length: 265 Bit Score: 51.33 E-value: 1.97e-07
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| 7tmA_S1PR | cd15102 | sphingosine-1-phosphate receptors, member of the class A family of seven-transmembrane G ... |
57-310 | 2.35e-07 | |||||
sphingosine-1-phosphate receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; The endothelial differentiation gene (Edg) family of G-protein coupled receptors binds blood borne lysophospholipids including sphingosine-1-phosphate (S1P) and lysophosphatidic acid (LPA), which are involved in the regulation of cell proliferation, survival, migration, invasion, endothelial cell shape change and cytoskeletal remodeling. The Edg receptors are classified into two subfamilies: the lysophosphatidic acid subfamily that includes LPA1 (Edg2), LPA2 (Edg4), and LPA3 (Edg7); and the S1P subfamily that includes S1P1 (Edg1), S1P2 (Edg5), S1P3 (Edg3), S1P4 (Edg6), and S1P5 (Edg8). The Edg receptors couple and activate at least three different G protein subtypes including G(i/o), G(q/11), and G(12/13). Pssm-ID: 320230 [Multi-domain] Cd Length: 270 Bit Score: 51.32 E-value: 2.35e-07
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| 7tmA_alpha2A_AR | cd15322 | alpha-2 adrenergic receptors subtype A, member of the class A family of seven-transmembrane G ... |
62-310 | 6.16e-07 | |||||
alpha-2 adrenergic receptors subtype A, member of the class A family of seven-transmembrane G protein-coupled receptors; The alpha-2 adrenergic receptors (or adrenoceptors) are a subfamily of the class A rhodopsin-like GPCRs that share a common architecture of seven transmembrane helices. This subfamily consists of three highly homologous receptor subtypes that have a key role in neurotransmitter release: alpha-2A, alpha-2B, and alpha-2C. In addition, a fourth subtype, alpha-2D is present in ray-finned fishes and amphibians, but is not found in humans. The alpha-2 receptors are found in both central and peripheral nervous system and serve to produce inhibitory functions through the G(i) proteins. Thus, the alpha-2 receptors inhibit adenylate cyclase, which decreases cAMP production and thereby decreases calcium influx during the action potential. Consequently, lowered levels of calcium will lead to a decrease in neurotransmitter release by negative feedback. Pssm-ID: 320445 [Multi-domain] Cd Length: 259 Bit Score: 49.94 E-value: 6.16e-07
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| 7tmA_alpha1B_AR | cd15326 | alpha-1 adrenergic receptors subtype B, member of the class A family of seven-transmembrane G ... |
125-310 | 9.33e-07 | |||||
alpha-1 adrenergic receptors subtype B, member of the class A family of seven-transmembrane G protein-coupled receptors; The alpha-1 adrenergic receptors (or adrenoceptors) are a subfamily of the class A rhodopsin-like GPCRs that share a common architecture of seven transmembrane helices. This subfamily consists of three highly homologous receptor subtypes that primarily mediate smooth muscle contraction: alpha-1A, alpha-1B, and alpha-1D. Activation of alpha-1 receptors by catecholamines such as norepinephrine and epinephrine couples to the G(q) protein, which then activates the phospholipase C pathway, leading to an increase in IP3 and calcium. Consequently, the elevation of intracellular calcium concentration leads to vasoconstriction in smooth muscle of blood vessels. In addition, activation of alpha-1 receptors by phenylpropanolamine (PPA) produces anorexia and may induce appetite suppression in rats. Pssm-ID: 320449 [Multi-domain] Cd Length: 261 Bit Score: 49.51 E-value: 9.33e-07
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| 7tmA_Adenosine_R_A2A | cd15068 | adenosine receptor subtype A2A, member of the class A family of seven-transmembrane G ... |
125-309 | 1.17e-06 | |||||
adenosine receptor subtype A2A, member of the class A family of seven-transmembrane G protein-coupled receptors; The A2A receptor, a member of the adenosine receptor family of G protein-coupled receptors, binds adenosine as its endogenous ligand and is involved in regulating myocardial oxygen consumption and coronary blood flow. High-affinity A2A and low-affinity A2B receptors are preferentially coupled to G proteins of the stimulatory (Gs) family, which lead to activation of adenylate cyclase and thereby increasing the intracellular cAMP levels. The A2A receptor activation protects against tissue injury and acts as anti-inflammatory agent. In human skin endothelial cells, activation of A2B receptor, but not the A2A receptor, promotes angiogenesis. Alternatively, activated A2A receptor, but not the A2B receptor, promotes angiogenesis in human umbilical vein and lung microvascular endothelial cells. The A2A receptor alters cardiac contractility indirectly by modulating the anti-adrenergic effect of A1 receptor, while the A2B receptor exerts direct effects on cardiac contractile function, but does not modulate beta-adrenergic or A1 anti-adrenergic effects. Pssm-ID: 320196 [Multi-domain] Cd Length: 293 Bit Score: 49.17 E-value: 1.17e-06
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| 7tmA_alpha1_AR | cd15062 | alpha-1 adrenergic receptors, member of the class A family of seven-transmembrane G ... |
125-310 | 1.33e-06 | |||||
alpha-1 adrenergic receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; The alpha-1 adrenergic receptors (or adrenoceptors) are a subfamily of the class A rhodopsin-like GPCRs that share a common architecture of seven transmembrane helices. This subfamily consists of three highly homologous receptor subtypes that primarily mediate smooth muscle contraction: alpha-1A, alpha-1B, and alpha-1D. Activation of alpha-1 receptors by catecholamines such as norepinephrine and epinephrine couples to the G(q) protein, which then activates the phospholipase C pathway, leading to an increase in IP3 and calcium. Consequently, the elevation of intracellular calcium concentration leads to vasoconstriction in smooth muscle of blood vessels. In addition, activation of alpha-1 receptors by phenylpropanolamine (PPA) produces anorexia and may induce appetite suppression in rats. Pssm-ID: 320190 [Multi-domain] Cd Length: 261 Bit Score: 49.02 E-value: 1.33e-06
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| 7tmA_5-HT1A_invertebrates | cd15331 | serotonin receptor subtype 1A from invertebrates, member of the class A family of ... |
246-310 | 1.43e-06 | |||||
serotonin receptor subtype 1A from invertebrates, member of the class A family of seven-transmembrane G protein-coupled receptors; The 5-HT1 receptors, one of 14 mammalian 5-HT receptors, is a member of the class A of GPCRs and is activated by the endogenous neurotransmitter and peripheral signal mediator serotonin (5-hydroxytryptamine, 5-HT). The 5-HT1 receptors mediate inhibitory neurotransmission by coupling to G proteins of the G(i/o) family, which lead to a decrease in adenylate cyclase activity, thereby decreasing intracellular cAMP levels and calcium influx. The 5-HT1 receptor subfamily includes 5 subtypes: 5-HT1A, 5-HT1B, 5-HT1D, 5-HT1E, and 5-HT1F. There is no 5-HT1C receptor subtype, as it has been reclassified as the 5-HT2C receptor. In the CNS, serotonin is involved in the regulation of appetite, mood, sleep, cognition, learning and memory, as well as implicated in neurologic disorders such as migraine, schizophrenia, and depression. Pssm-ID: 320454 [Multi-domain] Cd Length: 261 Bit Score: 48.89 E-value: 1.43e-06
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| 7tmA_LPAR3_Edg7 | cd15343 | lysophosphatidic acid receptor subtype 3 (LPAR3 or LPA3), also called endothelial ... |
49-307 | 1.46e-06 | |||||
lysophosphatidic acid receptor subtype 3 (LPAR3 or LPA3), also called endothelial differentiation gene 7 (Edg7), member of the class A family of seven-transmembrane G protein-coupled receptors; The endothelial differentiation gene (Edg) family of G-protein coupled receptors binds blood borne lysophospholipids including sphingosine-1-phosphate (S1P) and lysophosphatidic acid (LPA), which are involved in the regulation of cell proliferation, survival, migration, invasion, endothelial cell shape change and cytoskeletal remodeling. The Edg receptors are classified into two subfamilies: the lysophosphatidic acid subfamily that includes LPA1 (Edg2), LPA2 (Edg4), and LPA3 (Edg7); and the S1P subfamily that includes S1P1 (Edg1), S1P2 (Edg5), S1P3 (Edg3), S1P4 (Edg6), and S1P5 (Edg8). The Edg receptors couple and activate at least three different G protein subtypes including G(i/o), G(q/11), and G(12/13). Pssm-ID: 320465 [Multi-domain] Cd Length: 274 Bit Score: 48.72 E-value: 1.46e-06
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| 7tmA_alpha1D_AR | cd15327 | alpha-1 adrenergic receptors subtype D, member of the class A family of seven-transmembrane G ... |
125-310 | 1.99e-06 | |||||
alpha-1 adrenergic receptors subtype D, member of the class A family of seven-transmembrane G protein-coupled receptors; The alpha-1 adrenergic receptors (or adrenoceptors) are a subfamily of the class A rhodopsin-like GPCRs that share a common architecture of seven transmembrane helices. This subfamily consists of three highly homologous receptor subtypes that primarily mediate smooth muscle contraction: alpha-1A, alpha-1B, and alpha-1D. Activation of alpha-1 receptors by catecholamines such as norepinephrine and epinephrine couples to the G(q) protein, which then activates the phospholipase C pathway, leading to an increase in IP3 and calcium. Consequently, the elevation of intracellular calcium concentration leads to vasoconstriction in smooth muscle of blood vessels. In addition, activation of alpha-1 receptors by phenylpropanolamine (PPA) produces anorexia and may induce appetite suppression in rats. Pssm-ID: 320450 [Multi-domain] Cd Length: 261 Bit Score: 48.37 E-value: 1.99e-06
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| 7tmA_5-HT1F | cd15334 | serotonin receptor subtype 1F, member of the class A family of seven-transmembrane G ... |
125-310 | 2.37e-06 | |||||
serotonin receptor subtype 1F, member of the class A family of seven-transmembrane G protein-coupled receptors; The 5-HT1 receptors, one of 14 mammalian 5-HT receptors, is a member of the class A of GPCRs and is activated by the endogenous neurotransmitter and peripheral signal mediator serotonin (5-hydroxytryptamine, 5-HT). The 5-HT1 receptors mediate inhibitory neurotransmission by coupling to G proteins of the G(i/o) family, which lead to a decrease in adenylate cyclase activity, thereby decreasing intracellular cAMP levels and calcium influx. The 5-HT1 receptor subfamily includes 5 subtypes: 5-HT1A, 5-HT1B, 5-HT1D, 5-HT1E, and 5-HT1F. There is no 5-HT1C receptor subtype, as it has been reclassified as the 5-HT2C receptor. In the CNS, serotonin is involved in the regulation of appetite, mood, sleep, cognition, learning and memory, as well as implicated in neurologic disorders such as migraine, schizophrenia, and depression. Pssm-ID: 320456 [Multi-domain] Cd Length: 259 Bit Score: 48.02 E-value: 2.37e-06
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| 7tmA_tyramine_octopamine_R-like | cd15060 | tyramine/octopamine receptor-like, member of the class A family of seven-transmembrane G ... |
125-310 | 2.75e-06 | |||||
tyramine/octopamine receptor-like, member of the class A family of seven-transmembrane G protein-coupled receptors; This group includes tyramine/octopamine receptors and similar proteins found in insects and other invertebrates. Both octopamine and tyramine mediate their actions via G protein-coupled receptors (GPCRs) and are the invertebrate equivalent of vertebrate adrenergic neurotransmitters. In Drosophila, octopamine is involved in ovulation by mediating an egg release from the ovary, while a physiological role for tyramine in this process is not fully understood. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320188 [Multi-domain] Cd Length: 260 Bit Score: 47.81 E-value: 2.75e-06
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| 7tmA_alpha2_AR | cd15059 | alpha-2 adrenergic receptors, member of the class A family of seven-transmembrane G ... |
56-310 | 2.86e-06 | |||||
alpha-2 adrenergic receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; The alpha-2 adrenergic receptors (or adrenoceptors) are a subfamily of the class A rhodopsin-like GPCRs that share a common architecture of seven transmembrane helices. This subfamily consists of three highly homologous receptor subtypes that have a key role in neurotransmitter release: alpha-2A, alpha-2B, and alpha-2C. In addition, a fourth subtype, alpha-2D is present in ray-finned fishes and amphibians, but is not found in humans. The alpha-2 receptors are found in both central and peripheral nervous system and serve to produce inhibitory functions through the G(i) proteins. Thus, the alpha-2 receptors inhibit adenylate cyclase, which decreases cAMP production and thereby decreases calcium influx during the action potential. Consequently, lowered levels of calcium will lead to a decrease in neurotransmitter release by negative feedback. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320187 [Multi-domain] Cd Length: 261 Bit Score: 47.72 E-value: 2.86e-06
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| 7tmA_NPR-like_invertebrate | cd15391 | invertebrate neuropeptide receptor-like, member of the class A family of seven-transmembrane G ... |
115-305 | 3.03e-06 | |||||
invertebrate neuropeptide receptor-like, member of the class A family of seven-transmembrane G protein-coupled receptors; This subgroup includes putative neuropeptide receptor found in invertebrates, which is a member of class A of 7-transmembrane G protein-coupled receptors. This orphan receptor shares a significant amino acid sequence identity with the neurokinin 1 receptor (NK1R). The endogenous ligand for NK1R is substance P, an 11-amino acid peptide that functions as a vasodilator and neurotransmitter and is released from the autonomic sensory nerve fibers. Pssm-ID: 320513 [Multi-domain] Cd Length: 289 Bit Score: 47.89 E-value: 3.03e-06
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| 7tmA_alpha-2D_AR | cd15324 | alpha-2 adrenergic receptors subtype D, member of the class A family of seven-transmembrane G ... |
62-310 | 3.71e-06 | |||||
alpha-2 adrenergic receptors subtype D, member of the class A family of seven-transmembrane G protein-coupled receptors; The alpha-2 adrenergic receptors (or adrenoceptors) are a subfamily of the class A rhodopsin-like GPCRs that share a common architecture of seven transmembrane helices. This subfamily consists of three highly homologous receptor subtypes that have a key role in neurotransmitter release: alpha-2A, alpha-2B, and alpha-2C. In addition, a fourth subtype, alpha-2D is present in ray-finned fishes and amphibians, but is not found in humans. The alpha-2 receptors are found in both central and peripheral nervous system and serve to produce inhibitory functions through the G(i) proteins. Thus, the alpha-2 receptors inhibit adenylate cyclase, which decreases cAMP production and thereby decreases calcium influx during the action potential. Consequently, lowered levels of calcium will lead to a decrease in neurotransmitter release by negative feedback. Pssm-ID: 320447 [Multi-domain] Cd Length: 256 Bit Score: 47.56 E-value: 3.71e-06
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| 7tmA_mAChR_GAR-2-like | cd15302 | muscarinic acetylcholine receptor GAR-2 and similar proteins, member of the class A family of ... |
126-310 | 4.09e-06 | |||||
muscarinic acetylcholine receptor GAR-2 and similar proteins, member of the class A family of seven-transmembrane G protein-coupled receptors; Muscarinic acetylcholine receptors (mAChRs) regulate the activity of many fundamental central and peripheral functions. The mAChR family consists of 5 subtypes M1-M5, which can be further divided into two major groups according to their G-protein coupling preference. The M1, M3 and M5 receptors selectively interact with G proteins of the G(q/11) family, whereas the M2 and M4 receptors preferentially link to the G(i/o) types of G proteins. Activation of mAChRs by agonist (acetylcholine) leads to a variety of biochemical and electrophysiological responses. In general, the exact nature of these responses and the subsequent physiological effects mainly depend on the molecular and pharmacological identity of the activated receptor subtype(s). All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320429 [Multi-domain] Cd Length: 266 Bit Score: 47.43 E-value: 4.09e-06
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| 7tmA_Galanin_R-like | cd14971 | galanin receptor and related proteins, member of the class A family of seven-transmembrane G ... |
119-310 | 5.88e-06 | |||||
galanin receptor and related proteins, member of the class A family of seven-transmembrane G protein-coupled receptors; This subfamily includes G-protein coupled galanin receptors, kisspeptin receptor and allatostatin-A receptor (AstA-R) in insects. These receptors, which are members of the class A of seven transmembrane GPCRs, share a high degree of sequence homology among themselves. The galanin receptors bind galanin, a neuropeptide that is widely expressed in the brain, peripheral tissues, and endocrine glands. Galanin is implicated in numerous neurological and psychiatric diseases including Alzheimer's disease, eating disorders, and epilepsy, among many others. KiSS1-derived peptide receptor (also known as GPR54 or kisspeptin receptor) binds the peptide hormone kisspeptin (metastin), which encoded by the metastasis suppressor gene (KISS1) expressed in various endocrine and reproductive tissues. AstA-R is a G-protein coupled receptor that binds allatostatin A. Three distinct types of allatostatin have been identified in the insects and crustaceans: AstA, AstB, and AstC. They both inhibit the biosynthesis of juvenile hormone and exert an inhibitory influence on food intake. Therefore, allatostatins are considered as potential targets for insect control. Pssm-ID: 320102 [Multi-domain] Cd Length: 281 Bit Score: 47.08 E-value: 5.88e-06
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| 7tmA_LPAR1_Edg2 | cd15344 | lysophosphatidic acid receptor subtype 1 (LPAR1 or LPA1), also called endothelial ... |
111-307 | 7.23e-06 | |||||
lysophosphatidic acid receptor subtype 1 (LPAR1 or LPA1), also called endothelial differentiation gene 2 (Edg2), member of the class A family of seven-transmembrane G protein-coupled receptors; The endothelial differentiation gene (Edg) family of G-protein coupled receptors binds blood borne lysophospholipids including sphingosine-1-phosphate (S1P) and lysophosphatidic acid (LPA), which are involved in the regulation of cell proliferation, survival, migration, invasion, endothelial cell shape change and cytoskeletal remodeling. The Edg receptors are classified into two subfamilies: the lysophosphatidic acid subfamily that includes LPA1 (Edg2), LPA2 (Edg4), and LPA3 (Edg7); and the S1P subfamily that includes S1P1 (Edg1), S1P2 (Edg5), S1P3 (Edg3), S1P4 (Edg6), and S1P5 (Edg8). The Edg receptors couple and activate at least three different G protein subtypes including G(i/o), G(q/11), and G(12/13). Pssm-ID: 341348 [Multi-domain] Cd Length: 273 Bit Score: 46.56 E-value: 7.23e-06
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| 7tmA_D1A_dopamine_R | cd15320 | D1A (or D1) subtype dopamine receptor, member of the class A family of seven-transmembrane G ... |
125-310 | 7.98e-06 | |||||
D1A (or D1) subtype dopamine receptor, member of the class A family of seven-transmembrane G protein-coupled receptors; Dopamine receptors are members of the class A G protein-coupled receptors that are involved in many neurological processes in the central nervous system (CNS). The neurotransmitter dopamine is the primary endogenous agonist for dopamine receptors. Dopamine receptors consist of at least five subtypes: D1, D2, D3, D4, and D5. The D1 and D5 subtypes are members of the D1-like family of dopamine receptors, whereas the D2, D3 and D4 subtypes are members of the D2-like family. The D1-like family receptors are coupled to G proteins of the G(s) family, which activate adenylate cyclase, causing cAMP formation and activation of protein kinase A. Dopamine receptors are major therapeutic targets for neurological and psychiatric disorders such as drug abuse, depression, schizophrenia, or Parkinson's disease. Pssm-ID: 320443 [Multi-domain] Cd Length: 319 Bit Score: 46.92 E-value: 7.98e-06
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| 7tmA_TACR | cd15390 | neurokinin receptors (or tachykinin receptors), member of the class A family of ... |
101-304 | 1.13e-05 | |||||
neurokinin receptors (or tachykinin receptors), member of the class A family of seven-transmembrane G protein-coupled receptors; This group represents G-protein coupled receptors for a variety of neuropeptides of the tachykinin (TK) family. The tachykinins are widely distributed throughout the mammalian central and peripheral nervous systems and act as excitatory transmitters on neurons and cells in the gastrointestinal tract. The TKs are characterized by a common five-amino acid C-terminal sequence, Phe-X-Gly-Leu-Met-NH2, where X is a hydrophobic residue. The three major mammalian tachykinins are substance P (SP), neurokinin A (NKA), and neurokinin B (NKB). The physiological actions of tachykinins are mediated through three types of receptors: neurokinin receptor type 1 (NK1R), NK2R, and NK3R. SP is a high-affinity endogenous ligand for NK1R, which interacts with the Gq protein and activates phospholipase C, leading to elevation of intracellular calcium. NK2R is a high-affinity receptor for NKA, the tachykinin neuropeptide substance K. SP and NKA are found in the enteric nervous system and mediate in the regulation of gastrointestinal motility, secretion, vascular permeability, and pain perception. NK3R is activated by its high-affinity ligand, NKB, which is primarily involved in the central nervous system and plays a critical role in the regulation of gonadotropin hormone release and the onset of puberty. Pssm-ID: 320512 [Multi-domain] Cd Length: 289 Bit Score: 46.13 E-value: 1.13e-05
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| 7tmA_Dop1R2-like | cd15067 | dopamine 1-like receptor 2 from Drosophila melanogaster and similar proteins, member of the ... |
121-310 | 1.84e-05 | |||||
dopamine 1-like receptor 2 from Drosophila melanogaster and similar proteins, member of the class A family of seven-transmembrane G protein-coupled receptors; G protein-coupled dopamine 1-like receptor 2 is expressed in Drosophila heads and it shows significant sequence similarity with vertebrate and invertebrate dopamine receptors. Although the Drosophila Dop1R2 receptor does not cluster into the D1-like structural group, it does show pharmacological properties similar to D1-like receptors. As shown in vertebrate D1-like receptors, agonist stimulation of Dop1R2 activates adenylyl cyclase to increase cAMP levels and also generates a calcium signal through stimulation of phospholipase C. Pssm-ID: 320195 [Multi-domain] Cd Length: 262 Bit Score: 45.42 E-value: 1.84e-05
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| 7tmA_Adenosine_R_A1 | cd15071 | adenosine receptor subtype A1, member of the class A family of seven-transmembrane G ... |
211-310 | 2.83e-05 | |||||
adenosine receptor subtype A1, member of the class A family of seven-transmembrane G protein-coupled receptors; The adenosine A1 receptor, a member of the adenosine receptor family of G protein-coupled receptors, binds adenosine as its endogenous ligand. The A1 receptor has primarily inhibitory function on the tissues in which it is located. The A1 receptor slows metabolic activity in the brain and has a strong anti-adrenergic effects in the heart. Thus, it antagonizes beta1-adrenergic receptor-induced stimulation and thereby reduces cardiac contractility. The A1 receptor preferentially couples to G proteins of the G(i/o) family, which lead to inhibition of adenylate cyclase and thereby lowering the intracellular cAMP levels. Pssm-ID: 341323 [Multi-domain] Cd Length: 290 Bit Score: 44.84 E-value: 2.83e-05
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| 7tmA_5-HT4 | cd15056 | serotonin receptor subtype 4, member of the class A family of seven-transmembrane G ... |
62-310 | 3.17e-05 | |||||
serotonin receptor subtype 4, member of the class A family of seven-transmembrane G protein-coupled receptors; The 5-HT4 subtype is a member of the serotonin receptor family that belongs to the class A G protein-coupled receptors, and binds the neurotransmitter serotonin (5HT; 5-hydroxytryptamine) in the mammalian central nervous system (CNS). 5-HT4 receptors are selectively linked to G proteins of the G(s) family, which positively stimulate adenylate cyclase, causing cAMP formation and activation of protein kinase A. 5-HT4 receptor-specific agonists have been shown to enhance learning and memory in animal studies. Moreover, hippocampal 5-HT4 receptor expression has been reported to be inversely correlated with memory performance in humans. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320184 [Multi-domain] Cd Length: 294 Bit Score: 44.79 E-value: 3.17e-05
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| 7tmA_NPYR-like | cd15203 | neuropeptide Y receptors and related proteins, member of the class A family of ... |
199-310 | 4.24e-05 | |||||
neuropeptide Y receptors and related proteins, member of the class A family of seven-transmembrane G protein-coupled receptors; NPY is a 36-amino acid peptide neurotransmitter with a C-terminal tyrosine amide residue that is widely distributed in the brain and the autonomic nervous system of many mammalian species. NPY exerts its functions through five, G-protein coupled receptor subtypes including NPY1R, NPY2R, NPY4R, NPY5R, and NPY6R; however, NPY6R is not functional in humans. NYP receptors are also activated by its two other family members, peptide YY (PYY) and pancreatic polypeptide (PP). They typically couple to Gi or Go proteins, which leads to a decrease in adenylate cyclase activity, thereby decreasing intracellular cAMP levels, and are involved in diverse physiological roles including appetite regulation, circadian rhythm, and anxiety. Also included in this subgroup is prolactin-releasing peptide (PrRP) receptor (previously known as GPR10), which is activated by its endogenous ligand PrRP, a neuropeptide possessing C-terminal Arg-Phe-amide motif. There are two active isoforms of PrRP in mammals: one consists of 20 amino acid residues (PrRP-20) and the other consists of 31 amino acid residues (PrRP-31). PrRP receptor shows significant sequence homology to the NPY receptors, and a micromolar level of NPY can bind and completely inhibit the PrRP-evoked intracellular calcium response in PrRP receptor-expressing cells, suggesting that the PrRP receptor shares a common ancestor with the NPY receptors. Pssm-ID: 320331 [Multi-domain] Cd Length: 293 Bit Score: 44.52 E-value: 4.24e-05
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| 7tmA_S1PR3_Edg3 | cd15345 | sphingosine-1-phosphate receptor subtype 3 (S1PR3 or S1P3), also called endothelial ... |
49-310 | 5.30e-05 | |||||
sphingosine-1-phosphate receptor subtype 3 (S1PR3 or S1P3), also called endothelial differentiation gene 3 (Edg3), member of the class A family of seven-transmembrane G protein-coupled receptors; The endothelial differentiation gene (Edg) family of G-protein coupled receptors binds blood borne lysophospholipids including sphingosine-1-phosphate (S1P) and lysophosphatidic acid (LPA), which are involved in the regulation of cell proliferation, survival, migration, invasion, endothelial cell shape change and cytoskeletal remodeling. The Edg receptors are classified into two subfamilies: the lysophosphatidic acid subfamily that includes LPA1 (Edg2), LPA2 (Edg4), and LPA3 (Edg7); and the S1P subfamily that includes S1P1 (Edg1), S1P2 (Edg5), S1P3 (Edg3), S1P4 (Edg6), and S1P5 (Edg8). The Edg receptors couple and activate at least three different G protein subtypes including G(i/o), G(q/11), and G(12/13). Pssm-ID: 320467 [Multi-domain] Cd Length: 270 Bit Score: 44.04 E-value: 5.30e-05
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| 7tmA_TACR_family | cd14992 | tachykinin receptor and closely related proteins, member of the class A family of ... |
122-309 | 5.41e-05 | |||||
tachykinin receptor and closely related proteins, member of the class A family of seven-transmembrane G protein-coupled receptors; This subfamily includes G-protein coupled receptors for a variety of neuropeptides of the tachykinin (TK) family as well as closely related receptors. The tachykinins are widely distributed throughout the mammalian central and peripheral nervous systems and act as excitatory transmitters on neurons and cells in the gastrointestinal tract. The TKs are characterized by a common five-amino acid C-terminal sequence, Phe-X-Gly-Leu-Met-NH2, where X is a hydrophobic residue. The three major mammalian tachykinins are substance P (SP), neurokinin A (NKA), and neurokinin B (NKB). The physiological actions of tachykinins are mediated through three types of receptors: neurokinin receptor type 1 (NK1R), NK2R, and NK3R. SP is a high-affinity endogenous ligand for NK1R, which interacts with the Gq protein and activates phospholipase C, leading to elevation of intracellular calcium. NK2R is a high-affinity receptor for NKA, the tachykinin neuropeptide substance K. SP and NKA are found in the enteric nervous system and mediate in the regulation of gastrointestinal motility, secretion, vascular permeability, and pain perception. NK3R is activated by its high-affinity ligand, NKB, which is primarily involved in the central nervous system and plays a critical role in the regulation of gonadotropin hormone release and the onset of puberty. Pssm-ID: 320123 [Multi-domain] Cd Length: 291 Bit Score: 43.96 E-value: 5.41e-05
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| 7tmA_S1PR2_Edg5 | cd15347 | sphingosine-1-phosphate receptor subtype 2 (S1PR2 or S1P2), also called endothelial ... |
49-309 | 5.43e-05 | |||||
sphingosine-1-phosphate receptor subtype 2 (S1PR2 or S1P2), also called endothelial differentiation gene 5 (Edg5), member of the class A family of seven-transmembrane G protein-coupled receptors; The endothelial differentiation gene (Edg) family of G-protein coupled receptors binds blood borne lysophospholipids including sphingosine-1-phosphate (S1P) and lysophosphatidic acid (LPA), which are involved in the regulation of cell proliferation, survival, migration, invasion, endothelial cell shape change and cytoskeletal remodeling. The Edg receptors are classified into two subfamilies: the lysophosphatidic acid subfamily that includes LPA1 (Edg2), LPA2 (Edg4), and LPA3 (Edg7); and the S1P subfamily that includes S1P1 (Edg1), S1P2 (Edg5), S1P3 (Edg3), S1P4 (Edg6), and S1P5 (Edg8). The Edg receptors couple and activate at least three different G protein subtypes including G(i/o), G(q/11), and G(12/13). Pssm-ID: 320469 [Multi-domain] Cd Length: 266 Bit Score: 44.03 E-value: 5.43e-05
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| 7tmA_prokineticin-R | cd15204 | prokineticin receptors, member of the class A family of seven-transmembrane G protein-coupled ... |
122-309 | 7.08e-05 | |||||
prokineticin receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; Prokineticins 1 (PROK1) and 2 (PROK2), also known as endocrine gland vascular endothelial factor and Bombina varigata 8, respectively, are multifunctional chemokine-like peptides that are highly conserved across species. Prokineticins can bind with similar affinities to two closely homologous 7-transmembrane G protein coupled receptors, PROKR1 and PROKR2, which are phylogenetically related to the tachykinin receptors. Prokineticins and their GPCRs are widely distributed in human tissues and are involved in numerous physiological roles, including gastrointestinal motility, generation of circadian rhythms, neuron migration and survival, pain sensation, angiogenesis, inflammation, and reproduction. Moreover, different point mutations in genes encoding PROK2 or its receptor (PROKR2) can lead to Kallmann syndrome, a disease characterized by delayed or absent puberty and impaired olfactory function. Pssm-ID: 320332 [Multi-domain] Cd Length: 288 Bit Score: 43.80 E-value: 7.08e-05
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| 7tmA_QRFPR | cd15205 | pyroglutamylated RFamide peptide receptor, member of the class A family of seven-transmembrane ... |
189-309 | 7.65e-05 | |||||
pyroglutamylated RFamide peptide receptor, member of the class A family of seven-transmembrane G protein-coupled receptors; 26RFa, also known as QRFP (Pyroglutamylated RFamide peptide), is a 26-amino acid residue peptide that belongs to a family of neuropeptides containing an Arg-Phe-NH2 (RFamide) motif at its C-terminus. 26Rfa/QRFP exerts similar orexigenic activity including the regulation of feeding behavior in mammals. It is the ligand for G-protein coupled receptor 103 (GPR103), which is predominantly expressed in paraventricular (PVN) and ventromedial (VMH) nuclei of the hypothalamus. GPR103 shares significant protein sequence homology with orexin receptors (OX1R and OX2R), which have recently shown to produce a neuroprotective effect in Alzheimer's disease by forming a functional heterodimer with GPR103. Pssm-ID: 320333 [Multi-domain] Cd Length: 298 Bit Score: 43.62 E-value: 7.65e-05
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| 7tmA_S1PR1_Edg1 | cd15346 | sphingosine-1-phosphate receptor subtype 1 (S1PR1 or S1P1), also called endothelial ... |
57-310 | 9.28e-05 | |||||
sphingosine-1-phosphate receptor subtype 1 (S1PR1 or S1P1), also called endothelial differentiation gene 1 (Edg1), member of the class A family of seven-transmembrane G protein-coupled receptors; The endothelial differentiation gene (Edg) family of G-protein coupled receptors binds blood borne lysophospholipids including sphingosine-1-phosphate (S1P) and lysophosphatidic acid (LPA), which are involved in the regulation of cell proliferation, survival, migration, invasion, endothelial cell shape change and cytoskeletal remodeling. The Edg receptors are classified into two subfamilies: the lysophosphatidic acid subfamily that includes LPA1 (Edg2), LPA2 (Edg4), and LPA3 (Edg7); and the S1P subfamily that includes S1P1 (Edg1), S1P2 (Edg5), S1P3 (Edg3), S1P4 (Edg6), and S1P5 (Edg8). The Edg receptors couple and activate at least three different G protein subtypes including G(i/o), G(q/11), and G(12/13). Pssm-ID: 320468 [Multi-domain] Cd Length: 277 Bit Score: 43.33 E-value: 9.28e-05
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| 7tmA_mAChR_DM1-like | cd15301 | muscarinic acetylcholine receptor DM1, member of the class A family of seven-transmembrane G ... |
125-304 | 1.23e-04 | |||||
muscarinic acetylcholine receptor DM1, member of the class A family of seven-transmembrane G protein-coupled receptors; This subgroup includes muscarinic acetylcholine receptor DM1-like from invertebrates. Muscarinic acetylcholine receptors (mAChRs) regulate the activity of many fundamental central and peripheral functions. The mAChR family consists of 5 subtypes M1-M5, which can be further divided into two major groups according to their G-protein coupling preference. The M1, M3 and M5 receptors selectively interact with G proteins of the G(q/11) family, whereas the M2 and M4 receptors preferentially link to the G(i/o) types of G proteins. Activation of mAChRs by agonist (acetylcholine) leads to a variety of biochemical and electrophysiological responses. In general, the exact nature of these responses and the subsequent physiological effects mainly depend on the molecular and pharmacological identity of the activated receptor subtype(s). All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320428 [Multi-domain] Cd Length: 270 Bit Score: 42.89 E-value: 1.23e-04
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| 7tmA_D1B_dopamine_R | cd15319 | D1B (or D5) subtype dopamine receptor, member of the class A family of seven-transmembrane G ... |
125-310 | 1.25e-04 | |||||
D1B (or D5) subtype dopamine receptor, member of the class A family of seven-transmembrane G protein-coupled receptors; Dopamine receptors are members of the class A G protein-coupled receptors that are involved in many neurological processes in the central nervous system (CNS). The neurotransmitter dopamine is the primary endogenous agonist for dopamine receptors. Dopamine receptors consist of at least five subtypes: D1, D2, D3, D4, and D5. The D1 and D5 subtypes are members of the D1-like family of dopamine receptors, whereas the D2, D3 and D4 subtypes are members of the D2-like family. The D1-like family receptors are coupled to G proteins of the G(s) family, which activate adenylate cyclase, causing cAMP formation and activation of protein kinase A. Dopamine receptors are major therapeutic targets for neurological and psychiatric disorders such as drug abuse, depression, schizophrenia, or Parkinson's disease. Pssm-ID: 320442 [Multi-domain] Cd Length: 317 Bit Score: 43.02 E-value: 1.25e-04
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| 7tmA_Opsins_type2_animals | cd14969 | type 2 opsins in animals, member of the class A family of seven-transmembrane G ... |
49-310 | 1.92e-04 | |||||
type 2 opsins in animals, member of the class A family of seven-transmembrane G protein-coupled receptors; This rhodopsin family represents the type 2 opsins found in vertebrates and invertebrates except sponge. Type 2 opsins primarily function as G protein coupled receptors and are responsible for vision as well as for circadian rhythm and pigment regulation. On the contrary, type 1 opsins such as bacteriorhodopsin and proteorhodopsin are found in both prokaryotic and eukaryotic microbes, functioning as light-gated ion channels, proton pumps, sensory receptors and in other unknown functions. Although these two opsin types share seven-transmembrane domain topology and a conserved lysine reside in the seventh helix, type 1 opsins do not activate G-proteins and are not evolutionarily related to type 2. Type 2 opsins can be classified into six distinct subfamilies including the vertebrate opsins/encephalopsins, the G(o) opsins, the G(s) opsins, the invertebrate G(q) opsins, the photoisomerases, and the neuropsins. Pssm-ID: 381741 [Multi-domain] Cd Length: 284 Bit Score: 42.19 E-value: 1.92e-04
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| 7tmA_GPR39 | cd15135 | G protein-coupled receptor 39, member of the class A family of seven-transmembrane G ... |
243-310 | 1.96e-04 | |||||
G protein-coupled receptor 39, member of the class A family of seven-transmembrane G protein-coupled receptors; GPR39 is an orphan G protein-coupled receptor that belongs to the growth hormone secretagogue and neurotensin receptor subfamily. GPR39 is expressed in peripheral tissues such as pancreas, gut, gastrointestinal tract, liver, kidney as well as certain regions of the brain. The divalent metal ion Zn(2+) has been shown to be a ligand capable of activating GPR39. Thus, it has been suggested that GPR39 function as a G(q)-coupled Zn(2+)-sensing receptor which involved in the regulation of endocrine pancreatic function, body weight, gastrointestinal mobility, and cell death. Pssm-ID: 320263 [Multi-domain] Cd Length: 320 Bit Score: 42.48 E-value: 1.96e-04
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| 7tmA_Apelin_R | cd15190 | apelin receptor, member of the class A family of seven-transmembrane G protein-coupled ... |
205-310 | 2.68e-04 | |||||
apelin receptor, member of the class A family of seven-transmembrane G protein-coupled receptors; Apelin (APJ) receptor is a G protein-coupled receptor that binds the endogenous peptide ligands, apelin and Toddler/Elabela. APJ is an adipocyte-derived hormone that is ubiquitously expressed throughout the human body and Toddler/Elabela is a short secretory peptide that is required for normal cardiac development in zebrafish. Activation of APJ receptor plays key roles in diverse physiological processes including vasoconstriction and vasodilation, cardiac muscle contractility, angiogenesis, and regulation of water balance and food intake. Pssm-ID: 341340 [Multi-domain] Cd Length: 304 Bit Score: 42.06 E-value: 2.68e-04
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| 7tmA_GPR135 | cd15212 | G protein-coupled receptor 135, member of the class A family of seven-transmembrane G ... |
198-307 | 3.24e-04 | |||||
G protein-coupled receptor 135, member of the class A family of seven-transmembrane G protein-coupled receptors; GPR135, also known as the somatostatin- and angiotensin-like peptide receptor (SALPR), is found in various tissues including eye, brain, cervix, stomach, and testis. Pharmacological studies have shown that relaxin-3 (R3) is a high-affinity endogenous ligand for GPR135. R3 has recently been identified as a new member of the insulin/relaxin family of peptide hormones and is exclusively expressed in the brain neurons. In addition to GPR135, R3 also acts as an agonist for GPR142, a pseudogene in the rat, and can activate LGR7 (leucine repeat-containing G-protein receptor-7), which is the main receptor for relaxin-1 (R1) and relaxin-2 (R2). While R1 and R2 are hormones primarily associated with reproduction and pregnancy, R3 is involved in neuroendocrine and sensory processing. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320340 [Multi-domain] Cd Length: 285 Bit Score: 41.68 E-value: 3.24e-04
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| 7tmA_Gal1_R | cd15098 | galanin receptor subtype 1, member of the class A family of seven-transmembrane G ... |
119-310 | 3.49e-04 | |||||
galanin receptor subtype 1, member of the class A family of seven-transmembrane G protein-coupled receptors; The G protein-coupled galanin receptors bind galanin, a neuropeptide that is widely expressed in the brain, peripheral tissues, and endocrine glands. Three receptors subtypes have been so far identified: GAL1, GAL2, and GAL3. The specific functions of each subtype remains mostly unknown, although galanin is thought to be involved in a variety of neuronal functions such as hormone release and food intake. Galanin is implicated in numerous neurological and psychiatric diseases including Alzheimer's disease, depression, eating disorders, epilepsy and stroke, among many others. Pssm-ID: 320226 [Multi-domain] Cd Length: 282 Bit Score: 41.64 E-value: 3.49e-04
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| 7tmA_Adenosine_R_A3 | cd15070 | adenosine receptor subtype A3, member of the class A family of seven-transmembrane G ... |
62-306 | 3.72e-04 | |||||
adenosine receptor subtype A3, member of the class A family of seven-transmembrane G protein-coupled receptors; The A3 receptor, a member of the adenosine receptor family of G protein-coupled receptors, is coupled to G proteins of the inhibitory G(i) family, which lead to inhibition of adenylate cyclase and thereby lowering the intracellular cAMP levels. The A3 receptor has a sustained protective function in the heart during cardiac ischemia and contributes to inhibition of neutrophil degranulation in neutrophil-mediated tissue injury. Moreover, activation of A3 receptor by adenosine protects astrocytes from cell death induced by hypoxia. Pssm-ID: 320198 [Multi-domain] Cd Length: 280 Bit Score: 41.69 E-value: 3.72e-04
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| 7tmA_Melanopsin-like | cd15083 | vertebrate melanopsins and related opsins, member of the class A family of seven-transmembrane ... |
117-302 | 4.25e-04 | |||||
vertebrate melanopsins and related opsins, member of the class A family of seven-transmembrane G protein-coupled receptors; This group represent the Gq-coupled rhodopsin subfamily consists of melanopsins, insect photoreceptors R1-R6, invertebrate Gq opsins as well as their closely related opsins. Melanopsins (also called Opsin-4) are the primary photoreceptor molecules for non-visual functions such as the photo-entrainment of the circadian rhythm and pupillary constriction in mammals. Mammalian melanopsins are expressed only in the inner retina, whereas non-mammalian vertebrate melanopsins are localized in various extra-retinal tissues such as iris, brain, pineal gland, and skin. The outer photoreceptors (R1-R6) are the insect Drosophila equivalent to the vertebrate rods and are responsible for image formation and motion detection. The invertebrate G(q) opsins includes the arthropod and mollusk visual opsins as well as invertebrate melanopsins, which are also found in vertebrates. Arthropods possess color vision by the use of multiple opsins sensitive to different light wavelengths. Members of this subfamily belong to the class A of the G protein-coupled receptors and have seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. Pssm-ID: 320211 [Multi-domain] Cd Length: 291 Bit Score: 41.55 E-value: 4.25e-04
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| 7tmA_purinoceptor-like | cd14982 | purinoceptor and its related proteins, member of the class A family of seven-transmembrane G ... |
115-309 | 4.66e-04 | |||||
purinoceptor and its related proteins, member of the class A family of seven-transmembrane G protein-coupled receptors; Members of this subfamily include lysophosphatidic acid receptor, P2 purinoceptor, protease-activated receptor, platelet-activating factor receptor, Epstein-Barr virus induced gene 2, proton-sensing G protein-coupled receptors, GPR35, and GPR55, among others. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 341318 [Multi-domain] Cd Length: 283 Bit Score: 41.10 E-value: 4.66e-04
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| 7tmA_leucokinin-like | cd15393 | leucokinin-like peptide receptor from tick and related proteins, member of the class A family ... |
245-305 | 6.73e-04 | |||||
leucokinin-like peptide receptor from tick and related proteins, member of the class A family of seven-transmembrane G protein-coupled receptors; This subgroup includes a leucokinin-like peptide receptor from the Southern cattle tick, Boophilus microplus, a pest of cattle world-wide. Leucokinins are invertebrate neuropeptides that exhibit myotropic and diuretic activity. This receptor is the first neuropeptide receptor known from the Acari and the second known in the subfamily of leucokinin-like peptide G-protein-coupled receptors. The other known leucokinin-like peptide receptor is a lymnokinin receptor from the mollusc Lymnaea stagnalis. Pssm-ID: 320515 [Multi-domain] Cd Length: 288 Bit Score: 40.85 E-value: 6.73e-04
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| 7tmA_TAAR5 | cd15318 | trace amine-associated receptor 5, member of the class A family of seven-transmembrane G ... |
52-310 | 7.28e-04 | |||||
trace amine-associated receptor 5, member of the class A family of seven-transmembrane G protein-coupled receptors; The trace amine-associated receptor 5 is one of the 15 identified amine-activated G protein-coupled receptors (TAARs), a distinct subfamily within the class A G protein-coupled receptors. Trace amines are endogenous amines of unknown function that have strong structural and metabolic similarity to classical monoamine neurotransmitters (serotonin, noradrenaline, adrenaline, dopamine, and histamine), which play critical roles in human and animal physiological activities such as cognition, consciousness, mood, motivation, perception, and autonomic responses. However, trace amines are found in the mammalian brain at very low concentrations compared to classical monoamines. Trace amines, including p-tyramine, beta-phenylethylamine, and tryptamine, are also thought to act as chemical messengers to exert their biological effects in vertebrates. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320441 [Multi-domain] Cd Length: 282 Bit Score: 40.61 E-value: 7.28e-04
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| 7tmA_Beta1_AR | cd15958 | beta-1 adrenergic receptors (adrenoceptors), member of the class A family of ... |
121-310 | 8.88e-04 | |||||
beta-1 adrenergic receptors (adrenoceptors), member of the class A family of seven-transmembrane G protein-coupled receptors; The beta-1 adrenergic receptor (beta-1 adrenoceptor), also known as beta-1 AR, is activated by adrenaline (epinephrine) and plays important roles in regulating cardiac function and heart rate. The human heart contains three subtypes of the beta AR: beta-1 AR, beta-2 AR, and beta-3 AR. Beta-1 AR and beta-2 AR, which expressed at about a ratio of 70:30, are the major subtypes involved in modulating cardiac contractility and heart rate by positively stimulating the G(s) protein-adenylate cyclase-cAMP-PKA signaling pathway. In contrast, beta-3 AR produces negative inotropic effects by activating inhibitory G(i) proteins. The aberrant expression of betrayers can lead to cardiac dysfunction such as arrhythmias or heart failure. Pssm-ID: 320624 [Multi-domain] Cd Length: 298 Bit Score: 40.27 E-value: 8.88e-04
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| 7tmA_5-HT5 | cd15328 | serotonin receptor subtype 5, member of the class A family of seven-transmembrane G ... |
114-310 | 9.03e-04 | |||||
serotonin receptor subtype 5, member of the class A family of seven-transmembrane G protein-coupled receptors; 5-HT5 receptor, one of 14 mammalian 5-HT receptors, is activated by the neurotransmitter and peripheral signal mediator serotonin (also known as 5-hydroxytryptamine or 5-HT). The 5-HT5A and 5-HT5B receptors have been cloned from rat and mouse, but only the 5-HT5A isoform has been identified in human because of the presence of premature stop codons in the human 5-HT5B gene, which prevents a functional receptor from being expressed. 5-HT5 receptors mediate inhibitory neurotransmission by coupling to G proteins of the G(i/0) family, which lead to a decrease in adenylate cyclase activity, thereby decreasing intracellular cAMP levels and calcium influx. In the CNS, serotonin is involved in the regulation of appetite, mood, sleep, cognition, learning and memory, as well as implicated in neurologic disorders such as migraine, schizophrenia, and depression. Pssm-ID: 320451 [Multi-domain] Cd Length: 259 Bit Score: 40.32 E-value: 9.03e-04
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| 7tmA_Octopamine_R | cd15063 | octopamine receptors in invertebrates, member of the class A family of seven-transmembrane G ... |
49-310 | 9.13e-04 | |||||
octopamine receptors in invertebrates, member of the class A family of seven-transmembrane G protein-coupled receptors; G-protein coupled receptor for octopamine (OA), which functions as a neurotransmitter, neurohormone, and neuromodulator in invertebrate nervous system. Octopamine (also known as beta, 4-dihydroxyphenethylamine) is an endogenous trace amine that is highly similar to norepinephrine, but lacks a hydroxyl group, and has effects on the adrenergic and dopaminergic nervous systems. Based on the pharmacological and signaling profiles, the octopamine receptors can be classified into at least two groups: OA1 receptors elevate intracellular calcium levels in muscle, whereas OA2 receptors activate adenylate cyclase and increase cAMP production. Pssm-ID: 320191 [Multi-domain] Cd Length: 266 Bit Score: 40.17 E-value: 9.13e-04
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| 7tmA_Glycoprotein_LRR_R-like | cd14980 | glycoprotein hormone receptors and leucine-rich repeats containing G protein-coupled receptors, ... |
55-310 | 9.83e-04 | |||||
glycoprotein hormone receptors and leucine-rich repeats containing G protein-coupled receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; This subfamily includes the glycoprotein hormone receptors (GPHRs), vertebrate receptors containing 17 leucine-rich repeats (LGR4-6), and the relaxin family peptide receptors (also known as LGR7 and LGR8). They are seven transmembrane domain receptors with a very large extracellular N-terminal domain containing many leucine-rich repeats responsible for hormone recognition and binding. The glycoprotein hormone receptor family contains receptors for the pituitary hormones, thyrotropin (thyroid-stimulating hormone receptor), follitropin (follicle-stimulating hormone receptor), and lutropin (luteinizing hormone receptor). Glycoprotein hormone receptors couple primarily to the G(s)-protein and promotes cAMP production, but also to the G(i)- or G(q)-protein. Two orphan GPCRs, LGR7 and LGR8, have been recently identified as receptors for the relaxin peptide hormones. Pssm-ID: 320111 [Multi-domain] Cd Length: 286 Bit Score: 40.30 E-value: 9.83e-04
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| 7tm_GPCRs | cd14964 | seven-transmembrane G protein-coupled receptor superfamily; This hierarchical evolutionary ... |
126-304 | 1.20e-03 | |||||
seven-transmembrane G protein-coupled receptor superfamily; This hierarchical evolutionary model represents the seven-transmembrane (7TM) receptors, often referred to as G protein-coupled receptors (GPCRs), which transmit physiological signals from the outside of the cell to the inside via G proteins. GPCRs constitute the largest known superfamily of transmembrane receptors across the three kingdoms of life that respond to a wide variety of extracellular stimuli including peptides, lipids, neurotransmitters, amino acids, hormones, and sensory stimuli such as light, smell and taste. All GPCRs share a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. However, some 7TM receptors, such as the type 1 microbial rhodopsins, do not activate G proteins. Based on sequence similarity, GPCRs can be divided into six major classes: class A (the rhodopsin-like family), class B (the Methuselah-like, adhesion and secretin-like receptor family), class C (the metabotropic glutamate receptor family), class D (the fungal mating pheromone receptors), class E (the cAMP receptor family), and class F (the frizzled/smoothened receptor family). Nearly 800 human GPCR genes have been identified and are involved essentially in all major physiological processes. Approximately 40% of clinically marketed drugs mediate their effects through modulation of GPCR function for the treatment of a variety of human diseases including bacterial infections. Pssm-ID: 410628 [Multi-domain] Cd Length: 267 Bit Score: 39.72 E-value: 1.20e-03
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| 7tmA_Histamine_H1R | cd15050 | histamine subtype H1 receptor, member of the class A family of seven-transmembrane G ... |
105-310 | 1.24e-03 | |||||
histamine subtype H1 receptor, member of the class A family of seven-transmembrane G protein-coupled receptors; This group includes histamine receptor subtype H1R, a member of histamine receptor family, which belongs to the class A of GPCRs. Histamine plays a key role as chemical mediator and neurotransmitter in various physiological and pathophysiological processes in the central and peripheral nervous system. Histamine exerts its functions by binding to four different G protein-coupled receptors (H1-H4). H1R selectively interacts with the G(q)-type G protein that activates phospholipase C and the phosphatidylinositol pathway. Antihistamines, a widely used anti-allergy medication, act on the H1 subtype and produce drowsiness as a side effect. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320178 [Multi-domain] Cd Length: 263 Bit Score: 39.72 E-value: 1.24e-03
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| 7tmA_Histamine_H4R | cd15295 | histamine receptor subtype H4R, member of the class A family of seven-transmembrane G ... |
125-310 | 1.25e-03 | |||||
histamine receptor subtype H4R, member of the class A family of seven-transmembrane G protein-coupled receptors; This group includes histamine subtype H4R, a member of the histamine receptor family, which belong to the class A of GPCRs. Histamine plays a key role as chemical mediator and neurotransmitter in various physiological and pathophysiological processes in the central and peripheral nervous system. Histamine exerts its functions by binding to four different G protein-coupled receptors (H1-H4). The H3 and H4 receptors couple to the G(i)-proteins, which leading to the inhibition of cAMP formation. The H3R receptor functions as a presynaptic autoreceptors controlling histamine release and synthesis. The H4R plays an important role in histamine-mediated chemotaxis in mast cells and eosinophils. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320422 [Multi-domain] Cd Length: 267 Bit Score: 39.81 E-value: 1.25e-03
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| 7tmA_Beta3_AR | cd15959 | beta-3 adrenergic receptors (adrenoceptors), member of the class A family of ... |
121-300 | 1.42e-03 | |||||
beta-3 adrenergic receptors (adrenoceptors), member of the class A family of seven-transmembrane G protein-coupled receptors; The beta-3 adrenergic receptor (beta-3 adrenoceptor), also known as beta-3 AR, is activated by adrenaline and plays important roles in regulating cardiac function and heart rate. The human heart contains three subtypes of the beta AR: beta-1 AR, beta-2 AR, and beta-3 AR. Beta-1 AR and beta-2 AR, which expressed at about a ratio of 70:30, are the major subtypes involved in modulating cardiac contractility and heart rate by positively stimulating the G(s) protein-adenylate cyclase-cAMP-PKA signaling pathway. In contrast, beta-3 AR produces negative inotropic effects by activating inhibitory G(i) proteins. The aberrant expression of betrayers can lead to cardiac dysfunction such as arrhythmias or heart failure. Pssm-ID: 320625 [Multi-domain] Cd Length: 302 Bit Score: 39.89 E-value: 1.42e-03
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| 7tmA_Beta_AR | cd15058 | beta adrenergic receptors (adrenoceptors), member of the class A family of seven-transmembrane ... |
121-310 | 1.58e-03 | |||||
beta adrenergic receptors (adrenoceptors), member of the class A family of seven-transmembrane G protein-coupled receptors; The beta adrenergic receptor (beta adrenoceptor), also known as beta AR, is activated by hormone adrenaline (epinephrine) and plays important roles in regulating cardiac function and heart rate, as well as pulmonary physiology. The human heart contains three subtypes of the beta AR: beta-1 AR, beta-2 AR, and beta-3 AR. Beta-1 AR and beta-2 AR, which expressed at about a ratio of 70:30, are the major subtypes involved in modulating cardiac contractility and heart rate by positively stimulating the G(s) protein-adenylate cyclase-cAMP-PKA signaling pathway. In contrast, beta-3 AR produces negative inotropic effects by activating inhibitory G(i) proteins. The aberrant expression of beta-ARs can lead to cardiac dysfunction such as arrhythmias or heart failure. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320186 [Multi-domain] Cd Length: 305 Bit Score: 39.74 E-value: 1.58e-03
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| 7tmA_NPFFR | cd15207 | neuropeptide FF receptors, member of the class A family of seven-transmembrane G ... |
121-310 | 2.09e-03 | |||||
neuropeptide FF receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; Neuropeptide FF (NPFF) is a mammalian octapeptide that belongs to a family of neuropeptides containing an RF-amide motif at their C-terminus that have been implicated in a wide range of physiological functions in the brain including pain sensitivity, insulin release, food intake, memory, blood pressure, and opioid-induced tolerance and hyperalgesia. The effects of these peptides are mediated through neuropeptide FF1 and FF2 receptors (NPFF1-R and NPFF2-R) which are predominantly expressed in the brain. NPFF induces pro-nociceptive effects, mainly through the NPFF1-R, and anti-nociceptive effects, mainly through the NPFF2-R. NPFF has been shown to inhibit adenylate cyclase via the Gi protein coupled to NPFF1-R. Pssm-ID: 320335 [Multi-domain] Cd Length: 291 Bit Score: 39.14 E-value: 2.09e-03
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| 7tmA_Mrgpr | cd14973 | mas-related G protein-coupled receptors, member of the class A family of seven-transmembrane G ... |
98-302 | 3.34e-03 | |||||
mas-related G protein-coupled receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; The Mas-related G-protein coupled receptor (Mrgpr) family constitutes a group of orphan receptors exclusively expressed in nociceptive primary sensory neurons and mast cells in the skin. Members of the Mrgpr family have been implicated in the modulation of nociception, pruritus (itching), and mast cell degranulation. The Mrgpr family in rodents and humans contains more than 50 members that can be grouped into 9 distinct subfamilies: MrgprA, B, C (MrgprX1), D, E, F, G, H (GPR90), and the primate-specific MrgprX subfamily. Some Mrgprs can be activated by endogenous ligands such as beta-alanine, adenine (a cell metabolite and potential transmitter), RF-amide related peptides, or salusin-beta (a bioactive peptide). However, the effects of these agonists are not clearly understood, and the physiological role of the individual receptor family members remains to be determined. Also included in this family is Mas-related G-protein coupled receptor 1-like (MAS1L) which is only found in primates. The angiotensin-II metabolite angiotensin is an endogenous ligand for MAS1L. Pssm-ID: 320104 [Multi-domain] Cd Length: 272 Bit Score: 38.39 E-value: 3.34e-03
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| 7tmA_TACR-like | cd15202 | tachykinin receptors and related receptors, member of the class A family of ... |
246-305 | 4.33e-03 | |||||
tachykinin receptors and related receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; This group includes the neurokinin/tachykinin receptors and its closely related receptors such as orphan GPR83 and leucokinin-like peptide receptor. The tachykinins are widely distributed throughout the mammalian central and peripheral nervous systems and act as excitatory transmitters on neurons and cells in the gastrointestinal tract. The TKs are characterized by a common five-amino acid C-terminal sequence, Phe-X-Gly-Leu-Met-NH2, where X is a hydrophobic residue. The three major mammalian tachykinins are substance P (SP), neurokinin A (NKA), and neurokinin B (NKB). The physiological actions of tachykinins are mediated through three types of receptors: neurokinin receptor type 1 (NK1R), NK2R, and NK3R. SP is a high-affinity endogenous ligand for NK1R, which interacts with the Gq protein and activates phospholipase C, leading to elevation of intracellular calcium. NK2R is a high-affinity receptor for NKA, the tachykinin neuropeptide substance K. SP and NKA are found in the enteric nervous system and mediate in the regulation of gastrointestinal motility, secretion, vascular permeability, and pain perception. NK3R is activated by its high-affinity ligand, NKB, which is primarily involved in the central nervous system and plays a critical role in the regulation of gonadotropin hormone release and the onset of puberty. Pssm-ID: 320330 [Multi-domain] Cd Length: 288 Bit Score: 38.26 E-value: 4.33e-03
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| 7tmA_D2_dopamine_R | cd15309 | D2 subtype of the D2-like family of dopamine receptors, member of the class A family of ... |
115-310 | 4.78e-03 | |||||
D2 subtype of the D2-like family of dopamine receptors, member of the class A family of seven-transmembrane G protein-coupled receptors; Dopamine receptors are members of the class A G protein-coupled receptors that are involved in many neurological processes in the central nervous system (CNS). The neurotransmitter dopamine is the primary endogenous agonist for dopamine receptors. Dopamine receptors consist of at least five subtypes: D1, D2, D3, D4, and D5. The D1 and D5 subtypes are members of the D1-like family of dopamine receptors, whereas the D2, D3 and D4 subtypes are members of the D2-like family. Activation of D2-like family receptors is linked to G proteins of the G(i) family. This leads to a decrease in adenylate cyclase activity, thereby decreasing cAMP levels. Dopamine receptors are major therapeutic targets for neurological and psychiatric disorders such as drug abuse, depression, schizophrenia, or Parkinson's disease. Pssm-ID: 320435 [Multi-domain] Cd Length: 254 Bit Score: 38.09 E-value: 4.78e-03
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| 7tmA_mAChR_M5 | cd15300 | muscarinic acetylcholine receptor subtype M5, member of the class A family of ... |
125-309 | 4.99e-03 | |||||
muscarinic acetylcholine receptor subtype M5, member of the class A family of seven-transmembrane G protein-coupled receptors; Muscarinic acetylcholine receptors (mAChRs) regulate the activity of many fundamental central and peripheral functions. The mAChR family consists of 5 subtypes M1-M5, which can be further divided into two major groups according to their G-protein coupling preference. The M1, M3 and M5 receptors selectively interact with G proteins of the G(q/11) family, whereas the M2 and M4 receptors preferentially link to the G(i/o) types of G proteins. M5 mAChR is primarily found in the central nervous system and mediates acetylcholine-induced dilation of cerebral blood vessels. Activation of M5 receptor triggers a variety of cellular responses, including inhibition of adenylate cyclase, breakdown of phosphoinositides, and modulation of potassium channels. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 320427 [Multi-domain] Cd Length: 262 Bit Score: 38.08 E-value: 4.99e-03
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| 7tmA_D4_dopamine_R | cd15308 | D4 dopamine receptor of the D2-like family, member of the class A family of ... |
125-308 | 5.57e-03 | |||||
D4 dopamine receptor of the D2-like family, member of the class A family of seven-transmembrane G protein-coupled receptors; Dopamine receptors are members of the class A G protein-coupled receptors that are involved in many neurological processes in the central nervous system (CNS). The neurotransmitter dopamine is the primary endogenous agonist for dopamine receptors. Dopamine receptors consist of at least five subtypes: D1, D2, D3, D4, and D5. The D1 and D5 subtypes are members of the D1-like family of dopamine receptors, whereas the D2, D3 and D4 subtypes are members of the D2-like family. Activation of D2-like family receptors is linked to G proteins of the G(i) family. This leads to a decrease in adenylate cyclase activity, thereby decreasing cAMP levels. Dopamine receptors are major therapeutic targets for neurological and psychiatric disorders such as drug abuse, depression, schizophrenia, or Parkinson's disease. Pssm-ID: 320434 [Multi-domain] Cd Length: 258 Bit Score: 37.89 E-value: 5.57e-03
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| 7tmA_NPY6R | cd15396 | neuropeptide Y receptor type 6, member of the class A family of seven-transmembrane G ... |
243-309 | 6.03e-03 | |||||
neuropeptide Y receptor type 6, member of the class A family of seven-transmembrane G protein-coupled receptors; NPY is a 36-amino acid peptide neurotransmitter with a C-terminal tyrosine amide residue that is widely distributed in the brain and the autonomic nervous system of many mammalian species. NPY exerts its functions through five, G-protein coupled receptor subtypes including NPY1R, NPY2R, NPY4R, NPY5R, and NPY6R; however, NPY6R is not functional in humans. NYP receptors are also activated by its two other family members, peptide YY (PYY) and pancreatic polypeptide (PP). They typically couple to G(i) or G(o) proteins, which leads to a decrease in adenylate cyclase activity, thereby decreasing intracellular cAMP levels, and are involved in diverse physiological roles including appetite regulation, circadian rhythm, and anxiety. Pssm-ID: 320518 [Multi-domain] Cd Length: 293 Bit Score: 37.89 E-value: 6.03e-03
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| 7tmA_5-HT1E | cd15335 | serotonin receptor subtype 1E, member of the class A family of seven-transmembrane G ... |
246-310 | 6.50e-03 | |||||
serotonin receptor subtype 1E, member of the class A family of seven-transmembrane G protein-coupled receptors; The 5-HT1 receptors, one of 14 mammalian 5-HT receptors, is a member of the class A of GPCRs and is activated by the endogenous neurotransmitter and peripheral signal mediator serotonin (5-hydroxytryptamine, 5-HT). The 5-HT1 receptors mediate inhibitory neurotransmission by coupling to G proteins of the G(i/o) family, which lead to a decrease in adenylate cyclase activity, thereby decreasing intracellular cAMP levels and calcium influx. The 5-HT1 receptor subfamily includes 5 subtypes: 5-HT1A, 5-HT1B, 5-HT1D, 5-HT1E, and 5-HT1F. There is no 5-HT1C receptor subtype, as it has been reclassified as the 5-HT2C receptor. In the CNS, serotonin is involved in the regulation of appetite, mood, sleep, cognition, learning and memory, as well as implicated in neurologic disorders such as migraine, schizophrenia, and depression. Pssm-ID: 320457 [Multi-domain] Cd Length: 258 Bit Score: 37.60 E-value: 6.50e-03
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| 7tmA_Opsin_Gq_invertebrates | cd15337 | invertebrate Gq opsins, member of the class A family of seven-transmembrane G protein-coupled ... |
55-310 | 6.87e-03 | |||||
invertebrate Gq opsins, member of the class A family of seven-transmembrane G protein-coupled receptors; The invertebrate Gq-coupled opsin subfamily includes the arthropod and mollusc visual opsins. Like the vertebrate visual opsins, arthropods possess color vision by the use of multiple opsins sensitive to different light wavelengths. The invertebrate Gq opsins are closely related to the vertebrate melanopsins, the primary photoreceptor molecules for non-visual responses to light, and the R1-R6 photoreceptors, which are the fly equivalent to the vertebrate rods. The Gq opsins belong the class A of the G protein-coupled receptors and possess seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. Pssm-ID: 320459 [Multi-domain] Cd Length: 292 Bit Score: 37.69 E-value: 6.87e-03
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| 7tmA_mAChR_M1 | cd17790 | muscarinic acetylcholine receptor subtype M1, member of the class A family of ... |
121-309 | 9.09e-03 | |||||
muscarinic acetylcholine receptor subtype M1, member of the class A family of seven-transmembrane G protein-coupled receptors; Muscarinic acetylcholine receptors (mAChRs) regulate the activity of many fundamental central and peripheral functions. The mAChR family consists of 5 subtypes M1-M5, which can be further divided into two major groups according to their G-protein coupling preference. The M1, M3 and M5 receptors selectively interact with G proteins of the G(q/11) family, whereas the M2 and M4 receptors preferentially link to the G(i/o) types of G proteins. Activation of mAChRs by agonist (acetylcholine) leads to a variety of biochemical and electrophysiological responses. M1 is the dominant mAChR subtype involved in learning and memory. It is linked to synaptic plasticity, neuronal excitability, and neuronal differentiation during early development. All GPCRs have a common structural architecture comprising of seven-transmembrane (TM) alpha-helices interconnected by three extracellular and three intracellular loops. A general feature of GPCR signaling is agonist-induced conformational changes in the receptors, leading to activation of the heterotrimeric G proteins, which consist of the guanine nucleotide-binding G-alpha subunit and the dimeric G-beta-gamma subunits. The activated G proteins then bind to and activate numerous downstream effector proteins, which generate second messengers that mediate a broad range of cellular and physiological processes. Pssm-ID: 341356 [Multi-domain] Cd Length: 262 Bit Score: 37.25 E-value: 9.09e-03
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