metabotropic glutamate receptor 8 isoform X3 [Mus musculus]
Protein Classification
type 1 periplasmic-binding domain-containing protein( domain architecture ID 70)
type 1 periplasmic-binding domain-containing protein such as the ligand binding domains of the LacI family of transcriptional regulators, the ABC transporter substrate-binding proteins, the family C GPCRs, membrane bound guanylyl cyclases including the family of natriuretic peptide receptors (NPRs), and the N-terminal LIVBP-like domains of the ionotropic glutamate receptors (iGluRs); contains the Venus flytrap-like domain which undergoes transition from an open to a closed conformational state upon ligand binding
List of domain hits
| Name | Accession | Description | Interval | E-value | ||||||
| Periplasmic_Binding_Protein_type1 super family | cl10011 | Type 1 periplasmic binding fold superfamily; Type 1 periplasmic binding fold superfamily. This ... |
40-385 | 0e+00 | ||||||
Type 1 periplasmic binding fold superfamily; Type 1 periplasmic binding fold superfamily. This model and hierarchy represent the ligand binding domains of the LacI family of transcriptional regulators, periplasmic binding proteins of the ABC-type transport systems, the family C G-protein couples receptors (GPCRs), membrane bound guanylyl cyclases including the family of natriuretic peptide receptors (NPRs), and the N-terminal leucine-isoleucine-valine binding protein (LIVBP)-like domains of the ionotropic glutamate receptors (iGluRs). In LacI-like transcriptional regulator and the bacterial periplasmic binding proteins, the ligands are monosaccharides, including lactose, ribose, fructose, xylose, arabinose, galactose/glucose and other sugars, with a few exceptions. Periplasmic sugar binding proteins are one of the components of ABC transporters and are involved in the active transport of water-soluble ligands. The LacI family of proteins consists of transcriptional regulators related to the lac repressor. In this case, the sugar binding domain binds a sugar which changes the DNA binding activity of the repressor domain. The periplasmic binding proteins are the primary receptors for chemotaxis and transport of many sugar based solutes. The core structures of periplasmic binding proteins are classified into two types, and they differ in number and order of beta strands: type 1 has six beta strands while type 2 has five beta strands per sub-domain. These two structural folds are thought to be distantly related via a common ancestor. Notably, while the N-terminal LIVBP-like domain of iGluRs belongs to the type 1 periplasmic-binding fold protein superfamily, the glutamate-binding domain of the iGluR is structurally similar to the type 2 periplasmic-binding fold. The actual alignment was detected with superfamily member cd06376: Pssm-ID: 471960 [Multi-domain] Cd Length: 467 Bit Score: 740.08 E-value: 0e+00
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| Name | Accession | Description | Interval | E-value | ||||||
| PBP1_mGluR_groupIII | cd06376 | ligand-binding domain of the group III metabotropic glutamate receptor; Ligand-binding domain ... |
40-385 | 0e+00 | ||||||
ligand-binding domain of the group III metabotropic glutamate receptor; Ligand-binding domain of the group III metabotropic glutamate receptor, a family which contains mGlu4R, mGluR6R, mGluR7, and mGluR8; all of which inhibit adenylyl cyclase. The metabotropic glutamate receptor is a member of the family C of G-protein-coupled receptors that transduce extracellular signals into G-protein activation and ultimately into intracellular responses. The mGluRs are classified into three groups which comprise eight subtypes. Pssm-ID: 380599 [Multi-domain] Cd Length: 467 Bit Score: 740.08 E-value: 0e+00
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| ANF_receptor | pfam01094 | Receptor family ligand binding region; This family includes extracellular ligand binding ... |
74-353 | 8.91e-82 | ||||||
Receptor family ligand binding region; This family includes extracellular ligand binding domains of a wide range of receptors. This family also includes the bacterial amino acid binding proteins of known structure. Pssm-ID: 460062 [Multi-domain] Cd Length: 347 Bit Score: 255.00 E-value: 8.91e-82
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| LivK | COG0683 | ABC-type branched-chain amino acid transport system, periplasmic component [Amino acid ... |
72-298 | 7.90e-21 | ||||||
ABC-type branched-chain amino acid transport system, periplasmic component [Amino acid transport and metabolism]; Pssm-ID: 440447 [Multi-domain] Cd Length: 314 Bit Score: 92.30 E-value: 7.90e-21
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| Name | Accession | Description | Interval | E-value | ||||||
| PBP1_mGluR_groupIII | cd06376 | ligand-binding domain of the group III metabotropic glutamate receptor; Ligand-binding domain ... |
40-385 | 0e+00 | ||||||
ligand-binding domain of the group III metabotropic glutamate receptor; Ligand-binding domain of the group III metabotropic glutamate receptor, a family which contains mGlu4R, mGluR6R, mGluR7, and mGluR8; all of which inhibit adenylyl cyclase. The metabotropic glutamate receptor is a member of the family C of G-protein-coupled receptors that transduce extracellular signals into G-protein activation and ultimately into intracellular responses. The mGluRs are classified into three groups which comprise eight subtypes. Pssm-ID: 380599 [Multi-domain] Cd Length: 467 Bit Score: 740.08 E-value: 0e+00
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| PBP1_mGluR | cd06362 | ligand binding domain of metabotropic glutamate receptors (mGluR); Ligand binding domain of ... |
44-375 | 2.16e-172 | ||||||
ligand binding domain of metabotropic glutamate receptors (mGluR); Ligand binding domain of the metabotropic glutamate receptors (mGluR), which are members of the family C of G-protein-coupled receptors that transduce extracellular signals into G-protein activation and ultimately into cellular responses. mGluRs bind to glutamate and function as an excitatory neurotransmitter; they are involved in learning, memory, anxiety, and the perception of pain. Eight subtypes of mGluRs have been cloned so far, and are classified into three groups according to their sequence similarities, transduction mechanisms, and pharmacological profiles. Group I is composed of mGlu1R and mGlu5R that both stimulate PLC hydrolysis. Group II includes mGlu2R and mGlu3R, which inhibit adenylyl cyclase, as do mGlu4R, mGlu6R, mGlu7R, and mGlu8R, which form group III. Pssm-ID: 380585 [Multi-domain] Cd Length: 460 Bit Score: 490.27 E-value: 2.16e-172
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| PBP1_mGluR_groupII | cd06375 | ligand binding domain of the group II metabotropic glutamate receptor; Ligand binding domain ... |
40-390 | 1.14e-150 | ||||||
ligand binding domain of the group II metabotropic glutamate receptor; Ligand binding domain of the group II metabotropic glutamate receptor, a family that contains mGlu2R and mGlu3R, all of which inhibit adenylyl cyclase. The metabotropic glutamate receptor is a member of the family C of G-protein-coupled receptors that transduce extracellular signals into G-protein activation and ultimately into intracellular responses. The mGluRs are classified into three groups which comprise eight subtypes Pssm-ID: 380598 [Multi-domain] Cd Length: 462 Bit Score: 435.41 E-value: 1.14e-150
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| PBP1_ABC_transporter_GPCR_C-like | cd04509 | Family C of G-protein coupled receptors and their close homologs, the type 1 ... |
47-334 | 7.61e-144 | ||||||
Family C of G-protein coupled receptors and their close homologs, the type 1 periplasmic-binding proteins of ATP-binding cassette transporter-like systems; This CD includes members of the family C of G-protein coupled receptors and their close homologs, the type 1 periplasmic-binding proteins of ATP-binding cassette transporter-like systems. The family C GPCR includes glutamate/glycine-gated ion channels such as the NMDA receptor, G-protein-coupled receptors, metabotropic glutamate, GABA-B, calcium sensing, pheromone receptors, and atrial natriuretic peptide-guanylate cyclase receptors. The glutamate receptors that form cation-selective ion channels, iGluR, can be classified into three different subgroups according to their binding-affinity for the agonists NMDA (N-methyl-D-asparate), AMPA (alpha-amino-3-dihydro-5-methyl-3-oxo-4-isoxazolepropionic acid), and kainate. L-glutamate is a major neurotransmitter in the brain of vertebrates and acts through either mGluRs or iGluRs. mGluRs subunits possess seven transmembrane segments and a large N-terminal extracellular domain. ABC-type leucine-isoleucine-valine binding protein (LIVBP) is a bacterial periplasmic binding protein that has homology with the amino-terminal domain of the glutamate-receptor ion channels (iGluRs). The extracellular regions of iGluRs are made of two PBP-like domains in tandem, a LIVBP-like domain that constitutes the N terminus (included in this model) followed by a domain related to lysine-arginine-ornithine-binding protein (LAOBP) that belongs to the type 2 periplasmic binding fold protein superfamily. The uncharacterized periplasmic components of various ABC-type transport systems are also included in this family. Pssm-ID: 380490 Cd Length: 306 Bit Score: 412.08 E-value: 7.61e-144
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| PBP1_mGluR_groupI | cd06374 | ligand binding domain of the group I metabotropic glutamate receptor; Ligand binding domain of ... |
39-385 | 9.70e-129 | ||||||
ligand binding domain of the group I metabotropic glutamate receptor; Ligand binding domain of the group I metabotropic glutamate receptor, a family containing mGlu1R and mGlu5R, all of which stimulate phospholipase C (PLC) hydrolysis. The metabotropic glutamate receptor is a member of the family C of G-protein-coupled receptors that transduce extracellular signals into G-protein activation and ultimately into intracellular responses. The mGluRs are classified into three groups which comprise eight subtypes. Pssm-ID: 380597 [Multi-domain] Cd Length: 474 Bit Score: 379.77 E-value: 9.70e-129
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| PBP1_GPCR_family_C-like | cd06350 | ligand-binding domain of membrane-bound glutamate receptors that mediate excitatory ... |
47-350 | 1.89e-123 | ||||||
ligand-binding domain of membrane-bound glutamate receptors that mediate excitatory transmission on the cellular surface through initial binding of glutamate; categorized into ionotropic glutamate receptors (iGluRs) and metabotropic glutamate receptors (m; Ligand-binding domain of membrane-bound glutamate receptors that mediate excitatory transmission on the cellular surface through initial binding of glutamate and are categorized into ionotropic glutamate receptors (iGluRs) and metabotropic glutamate receptors (mGluRs). The metabotropic glutamate receptors (mGluR) are key receptors in the modulation of excitatory synaptic transmission in the central nervous system. The mGluRs are coupled to G proteins and are thus distinct from the iGluRs which internally contain ligand-gated ion channels. The mGluR structure is divided into three regions: the extracellular region, the seven-spanning transmembrane region and the cytoplasmic region. The extracellular region is further divided into the ligand-binding domain (LBD) and the cysteine-rich domain. The LBD has sequence similarity to the LIVBP, which is a bacterial periplasmic protein (PBP), as well as to the extracellular region of both iGluR and the gamma-aminobutyric acid (GABA)b receptor. iGluRs are divided into three main subtypes based on pharmacological profile: NMDA, AMPA, and kainate receptors. All family C GPCRs have a large extracellular N terminus that contain a domain with homology to bacterial periplasmic amino acid-binding proteins. Pssm-ID: 380573 Cd Length: 350 Bit Score: 361.61 E-value: 1.89e-123
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| PBP1_glutamate_receptors-like | cd06269 | ligand-binding domain of family C G-protein couples receptors (GPCRs), membrane bound guanylyl ... |
47-356 | 9.32e-91 | ||||||
ligand-binding domain of family C G-protein couples receptors (GPCRs), membrane bound guanylyl cyclases such as natriuretic peptide receptors (NPRs), and N-terminal leucine/isoleucine/valine-binding protein (LIVBP)-like domain of ionotropic glutamate rece; This CD represents the ligand-binding domain of the family C G-protein couples receptors (GPCRs), membrane bound guanylyl cyclases such as the family of natriuretic peptide receptors (NPRs), and the N-terminal leucine-isoleucine-valine binding protein (LIVBP)-like domain of the ionotropic glutamate receptors, all of which are structurally similar and related to the periplasmic-binding fold type 1 family. The family C GPCRs consists of metabotropic glutamate receptor (mGluR), a calcium-sensing receptor (CaSR), gamma-aminobutyric acid receptor (GABAbR), the promiscuous L-alpha-amino acid receptor GPR6A, families of taste and pheromone receptors, and orphan receptors. Truncated splicing variants of the orphan receptors are not included in this CD. The family C GPCRs are activated by endogenous agonists such as amino acids, ions, and sugar based molecules. Their amino terminal ligand-binding region is homologous to the bacterial leucine-isoleucine-valine binding protein (LIVBP) and a leucine binding protein (LBP). The ionotropic glutamate receptors (iGluRs) have an integral ion channel and are subdivided into three major groups based on their pharmacology and structural similarities: NMDA receptors, AMPA receptors, and kainate receptors. The family of membrane bound guanylyl cyclases is further divided into three subfamilies: the ANP receptor (GC-A)/C-type natriuretic peptide receptor (GC-B), the heat-stable enterotoxin receptor (GC-C)/sensory organ specific membrane GCs such as retinal receptors (GC-E, GC-F), and olfactory receptors (GC-D and GC-G). Pssm-ID: 380493 [Multi-domain] Cd Length: 332 Bit Score: 277.76 E-value: 9.32e-91
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| ANF_receptor | pfam01094 | Receptor family ligand binding region; This family includes extracellular ligand binding ... |
74-353 | 8.91e-82 | ||||||
Receptor family ligand binding region; This family includes extracellular ligand binding domains of a wide range of receptors. This family also includes the bacterial amino acid binding proteins of known structure. Pssm-ID: 460062 [Multi-domain] Cd Length: 347 Bit Score: 255.00 E-value: 8.91e-82
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| PBP1_CaSR | cd06364 | ligand-binding domain of the CaSR calcium-sensing receptor, a member of the family C receptors ... |
47-385 | 1.30e-78 | ||||||
ligand-binding domain of the CaSR calcium-sensing receptor, a member of the family C receptors within the G-protein coupled receptor superfamily; Ligand-binding domain of the CaSR calcium-sensing receptor, which is a member of the family C receptors within the G-protein coupled receptor superfamily. CaSR provides feedback control of extracellular calcium homeostasis by responding sensitively to acute fluctuations in extracellular ionized Ca2+ concentration. This ligand-binding domain has homology to the bacterial leucine-isoleucine-valine binding protein (LIVBP) and a leucine binding protein (LBP). CaSR is widely expressed in mammalian tissues and is active in tissues that are not directly involved in extracellular calcium homeostasis. Moreover, CaSR responds to aromatic, aliphatic, and polar amino acids, but not to positively charged or branched chain amino acids, which suggests that changes in plasma amino acid levels are likely to modulate whole body calcium metabolism. Additionally, the family C GPCRs includes at least two receptors with broad-spectrum amino acid-sensing properties: GPRC6A which recognizes basic and various aliphatic amino acids, its gold-fish homolog the 5.24 chemoreceptor, and a specific taste receptor (T1R) which responds to aliphatic, polar, charged, and branched amino acids, but not to aromatic amino acids. Pssm-ID: 380587 [Multi-domain] Cd Length: 473 Bit Score: 251.02 E-value: 1.30e-78
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| PBP1_pheromone_receptor | cd06365 | Ligand-binding domain of the V2R pheromone receptor, a member of the family C receptors within ... |
47-391 | 3.00e-58 | ||||||
Ligand-binding domain of the V2R pheromone receptor, a member of the family C receptors within the G-protein coupled receptor superfamily; Ligand-binding domain of the V2R pheromone receptor, a member of the family C receptors within the G-protein coupled receptor superfamily, which also includes the metabotropic glutamate receptor, the GABAb receptor, the calcium-sensing receptor (CaSR), the T1R taste receptor, and a small group of uncharacterized orphan receptors. Pssm-ID: 380588 [Multi-domain] Cd Length: 464 Bit Score: 197.48 E-value: 3.00e-58
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| PBP1_taste_receptor | cd06363 | ligand-binding domain of the T1R taste receptor; Ligand-binding domain of the T1R taste ... |
41-349 | 6.86e-52 | ||||||
ligand-binding domain of the T1R taste receptor; Ligand-binding domain of the T1R taste receptor. The T1R is a member of the family C receptors within the G-protein coupled receptor superfamily, which also includes the metabotropic glutamate receptors, GABAb receptors, the calcium-sensing receptor (CaSR), the V2R pheromone receptors, and a small group of uncharacterized orphan receptors. Pssm-ID: 380586 [Multi-domain] Cd Length: 418 Bit Score: 179.43 E-value: 6.86e-52
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| PBP1_GPC6A-like | cd06361 | ligand-binding domain of the promiscuous L-alpha-amino acid receptor GPRC6A which is a ... |
47-347 | 7.14e-51 | ||||||
ligand-binding domain of the promiscuous L-alpha-amino acid receptor GPRC6A which is a broad-spectrum amino acid-sensing receptor; This family includes the ligand-binding domain of the promiscuous L-alpha-amino acid receptor GPRC6A which is a broad-spectrum amino acid-sensing receptor, and its fish homolog, the 5.24 chemoreceptor. GPRC6A is a member of the family C of G-protein-coupled receptors that transduce extracellular signals into G-protein activation and ultimately into cellular responses. Pssm-ID: 380584 [Multi-domain] Cd Length: 401 Bit Score: 176.41 E-value: 7.14e-51
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| PBP1_GABAb_receptor | cd06366 | ligand-binding domain of GABAb receptors, which are metabotropic transmembrane receptors for ... |
47-353 | 2.75e-30 | ||||||
ligand-binding domain of GABAb receptors, which are metabotropic transmembrane receptors for gamma-aminobutyric acid (GABA); Ligand-binding domain of GABAb receptors, which are metabotropic transmembrane receptors for gamma-aminobutyric acid (GABA). GABA is the major inhibitory neurotransmitter in the mammalian CNS and, like glutamate and other transmitters, acts via both ligand gated ion channels (GABAa receptors) and G-protein coupled receptors (GABAb receptor or GABAbR). GABAa receptors are members of the ionotropic receptor superfamily which includes alpha-adrenergic and glycine receptors. The GABAb receptor is a member of a receptor superfamily which includes the mGlu receptors. The GABAb receptor is coupled to G alpha-i proteins, and activation causes a decrease in calcium, an increase in potassium membrane conductance, and inhibition of cAMP formation. The response is thus inhibitory and leads to hyperpolarization and decreased neurotransmitter release, for example. Pssm-ID: 380589 [Multi-domain] Cd Length: 404 Bit Score: 120.81 E-value: 2.75e-30
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| Periplasmic_Binding_Protein_type1 | cd01391 | Type 1 periplasmic binding fold superfamily; Type 1 periplasmic binding fold superfamily. This ... |
72-361 | 1.71e-26 | ||||||
Type 1 periplasmic binding fold superfamily; Type 1 periplasmic binding fold superfamily. This model and hierarchy represent the ligand binding domains of the LacI family of transcriptional regulators, periplasmic binding proteins of the ABC-type transport systems, the family C G-protein couples receptors (GPCRs), membrane bound guanylyl cyclases including the family of natriuretic peptide receptors (NPRs), and the N-terminal leucine-isoleucine-valine binding protein (LIVBP)-like domains of the ionotropic glutamate receptors (iGluRs). In LacI-like transcriptional regulator and the bacterial periplasmic binding proteins, the ligands are monosaccharides, including lactose, ribose, fructose, xylose, arabinose, galactose/glucose and other sugars, with a few exceptions. Periplasmic sugar binding proteins are one of the components of ABC transporters and are involved in the active transport of water-soluble ligands. The LacI family of proteins consists of transcriptional regulators related to the lac repressor. In this case, the sugar binding domain binds a sugar which changes the DNA binding activity of the repressor domain. The periplasmic binding proteins are the primary receptors for chemotaxis and transport of many sugar based solutes. The core structures of periplasmic binding proteins are classified into two types, and they differ in number and order of beta strands: type 1 has six beta strands while type 2 has five beta strands per sub-domain. These two structural folds are thought to be distantly related via a common ancestor. Notably, while the N-terminal LIVBP-like domain of iGluRs belongs to the type 1 periplasmic-binding fold protein superfamily, the glutamate-binding domain of the iGluR is structurally similar to the type 2 periplasmic-binding fold. Pssm-ID: 380477 [Multi-domain] Cd Length: 280 Bit Score: 107.74 E-value: 1.71e-26
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| PBP1_ABC_ligand_binding-like | cd06346 | type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type ... |
145-344 | 1.53e-25 | ||||||
type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems predicted to be involved in uptake of amino acids, peptides, or inorganic ions; This subgroup includes the type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems that are predicted to be involved in uptake of amino acids, peptides, or inorganic ions. This subgroup has high sequence similarity to members of the family of hydrophobic amino acid transporters (HAAT), such as leucine-isoleucine-valine binding protein (LIVBP); however, its ligand specificity has not been determined experimentally. Pssm-ID: 380569 [Multi-domain] Cd Length: 314 Bit Score: 105.72 E-value: 1.53e-25
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| PBP1_ABC_transporter_LIVBP-like | cd06268 | periplasmic binding domain of ATP-binding cassette transporter-like systems that belong to the ... |
76-333 | 1.48e-22 | ||||||
periplasmic binding domain of ATP-binding cassette transporter-like systems that belong to the type 1 periplasmic binding fold protein superfamily; Periplasmic binding domain of ATP-binding cassette transporter-like systems that belong to the type 1 periplasmic binding fold protein superfamily. They are mostly present in archaea and eubacteria, and are primarily involved in scavenging solutes from the environment. ABC-type transporters couple ATP hydrolysis with the uptake and efflux of a wide range of substrates across bacterial membranes, including amino acids, peptides, lipids and sterols, and various drugs. These systems are comprised of transmembrane domains, nucleotide binding domains, and in most bacterial uptake systems, periplasmic binding proteins (PBPs) which transfer the ligand to the extracellular gate of the transmembrane domains. These PBPs bind their substrates selectively and with high affinity. Members of this group include ABC-type Leucine-Isoleucine-Valine-Binding Proteins (LIVBP), which are homologous to the aliphatic amidase transcriptional repressor, AmiC, of Pseudomonas aeruginosa. The uncharacterized periplasmic components of various ABC-type transport systems are included in this group. Pssm-ID: 380492 [Multi-domain] Cd Length: 298 Bit Score: 97.01 E-value: 1.48e-22
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| LivK | COG0683 | ABC-type branched-chain amino acid transport system, periplasmic component [Amino acid ... |
72-298 | 7.90e-21 | ||||||
ABC-type branched-chain amino acid transport system, periplasmic component [Amino acid transport and metabolism]; Pssm-ID: 440447 [Multi-domain] Cd Length: 314 Bit Score: 92.30 E-value: 7.90e-21
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| PBP1_NPR_GC-like | cd06352 | ligand-binding domain of membrane guanylyl-cyclase receptors; Ligand-binding domain of ... |
78-313 | 4.29e-18 | ||||||
ligand-binding domain of membrane guanylyl-cyclase receptors; Ligand-binding domain of membrane guanylyl-cyclase receptors. Membrane guanylyl cyclases (GC) have a single membrane-spanning region and are activated by endogenous and exogenous peptides. This family can be divided into three major subfamilies: the natriuretic peptide receptors (NPRs), sensory organ-specific membrane GCs, and the enterotoxin/guanylin receptors. The binding of peptide ligands to the receptor results in the activation of the cytosolic catalytic domain. Three types of NPRs have been cloned from mammalian tissues: NPR-A/GC-A, NPR-B/ GC-B, and NPR-C. In addition, two of the GCs, GC-D and GC-G, appear to be pseudogenes in humans. Atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP) are produced in the heart, and both bind to the NPR-A. NPR-C, also termed the clearance receptor, binds each of the natriuretic peptides and can alter circulating levels of these peptides. The ligand binding domain of the NPRs exhibits strong structural similarity to the type 1 periplasmic binding fold protein family. Pssm-ID: 380575 [Multi-domain] Cd Length: 391 Bit Score: 85.48 E-value: 4.29e-18
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| PBP1_ABC_ligand_binding-like | cd19984 | type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type ... |
145-334 | 1.71e-16 | ||||||
type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems predicted to be involved in uptake of amino acids, peptides, or inorganic ions; This subgroup includes the type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems that are predicted to be involved in uptake of amino acids, peptides, or inorganic ions. This subgroup has high sequence similarity to members of the family of hydrophobic amino acid transporters (HAAT), such as leucine-isoleucine-valine binding protein (LIVBP); however, its ligand specificity has not been determined experimentally. Pssm-ID: 380639 [Multi-domain] Cd Length: 296 Bit Score: 79.57 E-value: 1.71e-16
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| PBP1_SAP_GC-like | cd06370 | Ligand-binding domain of membrane bound guanylyl cyclases; Ligand-binding domain of membrane ... |
78-309 | 4.78e-16 | ||||||
Ligand-binding domain of membrane bound guanylyl cyclases; Ligand-binding domain of membrane bound guanylyl cyclases (GCs), which are known to be activated by sperm-activating peptides (SAPs), such as speract or resact. These ligand peptides are released by a range of invertebrates to stimulate the metabolism and motility of spermatozoa and are also potent chemoattractants. These GCs contain a single transmembrane segment, an extracellular ligand binding domain, and intracellular protein kinase-like and cyclase catalytic domains. GCs of insect and nematodes, which exhibit high sequence similarity to the speract receptor are also included in this model. Pssm-ID: 380593 [Multi-domain] Cd Length: 400 Bit Score: 79.21 E-value: 4.78e-16
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| PBP1_ABC_LivK_ligand_binding-like | cd06347 | type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type ... |
72-313 | 1.21e-15 | ||||||
type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems predicted to be involved in uptake of amino acids, peptides, or inorganic ions; This subgroup includes the type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems that are predicted to be involved in uptake of amino acids, peptides, or inorganic ions. This subgroup has high sequence similarity to members of the family of hydrophobic amino acid transporters (HAAT), such as leucine-isoleucine-valine binding protein (LIVBP); however, its ligand specificity has not been determined experimentally. Pssm-ID: 380570 [Multi-domain] Cd Length: 334 Bit Score: 77.58 E-value: 1.21e-15
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| PBP1_GABAb_receptor_plant | cd19990 | periplasmic ligand-binding domain of Arabidopsis thaliana glutamate receptors and its close ... |
146-353 | 3.29e-12 | ||||||
periplasmic ligand-binding domain of Arabidopsis thaliana glutamate receptors and its close homologs in other plants; This group includes the ligand-binding domain of Arabidopsis thaliana glutamate receptors, which have sequence similarity with animal ionotropic glutamate receptor and its close homologs in other plants. The ligand-binding domain of GABAb receptors are metabotropic transmembrane receptors for gamma-aminobutyric acid (GABA). GABA is the major inhibitory neurotransmitter in the mammalian CNS and, like glutamate and other transmitters, acts via both ligand gated ion channels (GABAa receptors) and G-protein coupled receptors (GABAb receptor or GABAbR). GABAa receptors are members of the ionotropic receptor superfamily which includes alpha-adrenergic and glycine receptors. The GABAb receptor is a member of a receptor superfamily which includes the mGlu receptors. The GABAb receptor is coupled to G alpha-i proteins, and activation causes a decrease in calcium, an increase in potassium membrane conductance, and inhibition of cAMP formation. The response is thus inhibitory and leads to hyperpolarization and decreased neurotransmitter release, for example. Pssm-ID: 380645 [Multi-domain] Cd Length: 373 Bit Score: 67.64 E-value: 3.29e-12
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| PBP1_ABC_LIVBP-like | cd06342 | type 1 periplasmic ligand-binding domain of ABC (Atpase Binding Cassette)-type active ... |
145-244 | 6.37e-12 | ||||||
type 1 periplasmic ligand-binding domain of ABC (Atpase Binding Cassette)-type active transport systems involved in the transport of all three branched chain aliphatic amino acids (leucine, isoleucine and valine); This subgroup includes the type 1 periplasmic ligand-binding domain of ABC (Atpase Binding Cassette)-type active transport systems that are involved in the transport of all three branched chain aliphatic amino acids (leucine, isoleucine and valine). This subgroup also includes a leucine-specific binding protein (or LivK), which is very similar in sequence and structure to leucine-isoleucine-valine binding protein (LIVBP). ABC-type active transport systems are transmembrane proteins that function in the transport of diverse sets of substrates across extra- and intracellular membranes, including carbohydrates, amino acids, inorganic ions, dipeptides and oligopeptides, metabolic products, lipids and sterols, and heme, to name a few. Pssm-ID: 380565 [Multi-domain] Cd Length: 334 Bit Score: 66.40 E-value: 6.37e-12
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| PBP1_ABC_ligand_binding-like | cd19980 | type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type ... |
72-330 | 6.84e-12 | ||||||
type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems predicted to be involved in uptake of amino acids, peptides, or inorganic ions; This subgroup includes the type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems that are predicted to be involved in uptake of amino acids, peptides, or inorganic ions. This subgroup has high sequence similarity to members of the family of hydrophobic amino acid transporters (HAAT), such as leucine-isoleucine-valine binding protein (LIVBP); however, its ligand specificity has not been determined experimentally. Pssm-ID: 380635 [Multi-domain] Cd Length: 334 Bit Score: 66.09 E-value: 6.84e-12
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| PBP1_ABC_HAAT-like | cd19988 | type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type ... |
72-298 | 2.60e-11 | ||||||
type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems predicted to be involved in uptake of amino acids or peptides; This subgroup includes the type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems that are predicted to be involved in the uptake of amino acids or peptides. This subgroup has high sequence similarity to members of the family of hydrophobic amino acid transporters (HAAT), such as leucine-isoleucine-valine binding protein (LIVBP); however, its ligand specificity has not been determined experimentally. Pssm-ID: 380643 [Multi-domain] Cd Length: 302 Bit Score: 64.22 E-value: 2.60e-11
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| PBP1_ABC_ligand_binding-like | cd06335 | type 1 periplasmic ligand-binding domain of uncharacterized ABC (ATPase Binding Cassette)-type ... |
78-236 | 6.51e-11 | ||||||
type 1 periplasmic ligand-binding domain of uncharacterized ABC (ATPase Binding Cassette)-type active transport systems predicted to be involved in transport of amino acids, peptides, or inorganic ions; This subgroup includes the type 1 periplasmic ligand-binding domain of uncharacterized ABC (ATPase Binding Cassette)-type active transport systems that are predicted to be involved in transport of amino acids, peptides, or inorganic ions. Members of this group are sequence-similar to members of the family of ABC-type hydrophobic amino acid transporters, such as leucine-isoleucine-valine binding protein (LIVBP); however their ligand specificity has not been determined experimentally. Pssm-ID: 380558 [Multi-domain] Cd Length: 348 Bit Score: 63.40 E-value: 6.51e-11
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| PBP1_ABC_HAAT-like | cd19985 | type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type ... |
69-314 | 6.70e-11 | ||||||
type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems predicted to be involved in uptake of hydrophobic amino acids or peptides; This subgroup includes the type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems that are predicted to be involved in the uptake of hydrophobic amino acids or peptides. This subgroup has high sequence similarity to members of the family of hydrophobic amino acid transporters (HAAT), such as leucine-isoleucine-valine binding protein (LIVBP); however, its ligand specificity has not been determined experimentally. Pssm-ID: 380640 [Multi-domain] Cd Length: 321 Bit Score: 63.06 E-value: 6.70e-11
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| PBP1_iGluR_NMDA_NR1 | cd06379 | N-terminal leucine-isoleucine-valine-binding protein (LIVBP)-like domain of the NR1, an ... |
82-306 | 1.87e-10 | ||||||
N-terminal leucine-isoleucine-valine-binding protein (LIVBP)-like domain of the NR1, an essential channel-forming subunit of the NMDA receptor; N-terminal leucine-isoleucine-valine binding protein (LIVBP)-like domain of the NR1, an essential channel-forming subunit of the NMDA receptor. The ionotropic N-methyl-D-asparate (NMDA) subtype of glutamate receptor serves critical functions in neuronal development, functioning, and degeneration in the mammalian central nervous system. The functional NMDA receptor is a heterotetramer ccomposed of two NR1 and two NR2 (A, B, C, and D) or of NR3 (A and B) subunits. The receptor controls a cation channel that is highly permeable to monovalent ions and calcium and exhibits voltage-dependent inhibition by magnesium. Dual agonists, glutamate and glycine, are required for efficient activation of the NMDA receptor. When co-expressed with NR1, the NR3 subunits form receptors that are activated by glycine alone and therefore can be classified as excitatory glycine receptors. NR1/NR3 receptors are calcium-impermeable and unaffected by ligands acting at the NR2 glutamate-binding site Pssm-ID: 380602 Cd Length: 364 Bit Score: 61.97 E-value: 1.87e-10
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| PBP1_ABC_RPA1789-like | cd06333 | type 1 periplasmic binding-protein component (CouP) of an ABC system (CouPSTU; RPA1789, ... |
72-243 | 3.77e-10 | ||||||
type 1 periplasmic binding-protein component (CouP) of an ABC system (CouPSTU; RPA1789, RPA1791-1793), involved in active transport of lignin-derived aromatic substrates, and its close homologs; This group includes RPA1789 (CouP) from Rhodopseudomonas palustris and its close homologs in other bacteria. RPA1789 (CouP) is the periplasmic binding-protein component of an ABC system (CouPSTU; RPA1789, RPA1791-1793) that is involved in the active transport of lignin-derived aromatic substrates. Members of this group has high sequence similarity to members of the family of hydrophobic amino acid transporters (HAAT), such as leucine-isoleucine-valine binding protein (LIVBP). Pssm-ID: 380556 [Multi-domain] Cd Length: 342 Bit Score: 61.02 E-value: 3.77e-10
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| PBP1_ABC_HAAT-like | cd19981 | type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type ... |
72-244 | 2.38e-09 | ||||||
type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems predicted to be involved in uptake of amino acids or peptides; This subgroup includes the type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems that are predicted to be involved in the uptake of amino acids or peptides. This subgroup has high sequence similarity to members of the family of hydrophobic amino acid transporters (HAAT), such as leucine-isoleucine-valine binding protein (LIVBP); however, its ligand specificity has not been determined experimentally. Pssm-ID: 380636 [Multi-domain] Cd Length: 297 Bit Score: 58.07 E-value: 2.38e-09
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| PBP1_GC_G-like | cd06372 | Ligand-binding domain of membrane guanylyl cyclase G; This group includes the ligand-binding ... |
78-306 | 4.77e-08 | ||||||
Ligand-binding domain of membrane guanylyl cyclase G; This group includes the ligand-binding domain of membrane guanylyl cyclase G (GC-G) which is a sperm surface receptor and might function, similar to its sea urchin counterpart, in the early signaling event that regulates the Ca2+ influx/efflux and subsequent motility response in sperm. GC-G appears to be a pseudogene in human. Furthermore, in contrast to the other orphan receptor GCs, GC-G has a broad tissue distribution in rat, including lung, intestine, kidney, and skeletal muscle. Pssm-ID: 380595 [Multi-domain] Cd Length: 390 Bit Score: 54.80 E-value: 4.77e-08
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| PBP1_ABC_HAAT-like | cd06344 | type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type ... |
141-298 | 1.12e-07 | ||||||
type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems predicted to be involved in uptake of hydrophobic amino acids or peptides; This subgroup includes the type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems that are predicted to be involved in the uptake of hydrophobic amino acids or peptides. This subgroup has high sequence similarity to members of the family of hydrophobic amino acid transporters (HAAT), such as leucine-isoleucine-valine binding protein (LIVBP); however, its ligand specificity has not been determined experimentally. Pssm-ID: 380567 [Multi-domain] Cd Length: 332 Bit Score: 53.38 E-value: 1.12e-07
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| PBP1_ABC_HAAT-like | cd19983 | type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type ... |
120-368 | 5.51e-07 | ||||||
type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems predicted to be involved in uptake of hydrophobic amino acids or peptides; This subgroup includes the type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems that are predicted to be involved in the uptake of hydrophobic amino acids or peptides. This subgroup has high sequence similarity to members of the family of hydrophobic amino acid transporters (HAAT), such as leucine-isoleucine-valine binding protein (LIVBP); however, its ligand specificity has not been determined experimentally. Pssm-ID: 380638 [Multi-domain] Cd Length: 303 Bit Score: 51.05 E-value: 5.51e-07
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| PBP1_ABC_HAAT-like | cd19986 | type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type ... |
145-316 | 9.76e-07 | ||||||
type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems predicted to be involved in uptake of amino acids or peptides; This subgroup includes the type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems that are predicted to be involved in the uptake of amino acids or peptides. This subgroup has high sequence similarity to members of the family of hydrophobic amino acid transporters (HAAT), such as leucine-isoleucine-valine binding protein (LIVBP); however, its ligand specificity has not been determined experimentally. Pssm-ID: 380641 [Multi-domain] Cd Length: 297 Bit Score: 50.32 E-value: 9.76e-07
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| PBP1_ABC_HAAT-like | cd06349 | type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type ... |
127-333 | 1.40e-06 | ||||||
type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems predicted to be involved in uptake of amino acids or peptides; This subgroup includes the type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems that are predicted to be involved in the uptake of amino acids or peptides. This subgroup has high sequence similarity to members of the family of hydrophobic amino acid transporters (HAAT), such as leucine-isoleucine-valine binding protein (LIVBP); however, its ligand specificity has not been determined experimentally. Pssm-ID: 380572 [Multi-domain] Cd Length: 338 Bit Score: 49.87 E-value: 1.40e-06
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| PBP1_iGluR_NMDA | cd06367 | N-terminal leucine-isoleucine-valine-binding protein (LIVBP)-like domain of the ionotropic ... |
184-319 | 1.08e-05 | ||||||
N-terminal leucine-isoleucine-valine-binding protein (LIVBP)-like domain of the ionotropic N-methyl-D-asparate (NMDA) subtype of glutamate receptors; N-terminal leucine-isoleucine-valine binding protein (LIVBP)-like domain of the ionotropic N-methyl-D-asparate (NMDA) subtype of glutamate receptors. While this N-terminal domain belongs to the periplasmic-binding fold type 1 superfamily, the glutamate-binding domain of the iGluR is structurally homologous to the periplasmic-binding fold type 2. The LIVBP-like domain of iGluRs is thought to play a role in the initial assembly of iGluR subunits, but it is not well understood how this domain is arranged and functions in intact iGluR. The function of the NMDA subtype receptor serves critical functions in neuronal development, functioning, and degeneration in the mammalian central nervous system. The functional NMDA receptor is a heterotetramer comprising two NR1 and two NR2 (A, B, C, and D) or NR3 (A and B) subunits. The receptor controls a cation channel that is highly permeable to monovalent ions and calcium and exhibits voltage-dependent inhibition by magnesium. Dual agonists, glutamate and glycine, are required for efficient activation of the NMDA receptor. Among NMDA receptor subtypes, the NR2B subunit containing receptors appear particularly important for pain perception; thus NR2B-selective antagonists may be useful in the treatment of chronic pain. Pssm-ID: 380590 [Multi-domain] Cd Length: 357 Bit Score: 47.23 E-value: 1.08e-05
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| PBP1_SBP-like | cd19989 | periplasmic substrate-binding domain of active transport proteins; Periplasmic ... |
72-368 | 1.48e-05 | ||||||
periplasmic substrate-binding domain of active transport proteins; Periplasmic substrate-binding domain of active transport proteins found in bacteria and Archaea. Members of this group are initial receptors in the process of active transport across cellular membrane, but their substrate specificities are not known in detail. However, they closely resemble the group of AmiC and active transport systems for short-chain amides and urea (FmdDEF), and thus are likely to exhibit a ligand-binding mode similar to that of the amide sensor protein AmiC from Pseudomonas aeruginosa. Moreover, this binding domain has high sequence identity to the family of hydrophobic amino acid transporters (HAAT), and thus it may also be involved in transport of amino acids. Pssm-ID: 380644 [Multi-domain] Cd Length: 299 Bit Score: 46.50 E-value: 1.48e-05
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| PBP1_ABC_ligand_binding-like | cd19982 | type 1 periplasmic ligand-binding domain of uncharacterized ABC (ATPase Binding Cassette)-type ... |
120-243 | 1.68e-05 | ||||||
type 1 periplasmic ligand-binding domain of uncharacterized ABC (ATPase Binding Cassette)-type active transport systems predicted to be involved in transport of amino acids, peptides, or inorganic ions; This subgroup includes the type 1 periplasmic ligand-binding domain of uncharacterized ABC (ATPase Binding Cassette)-type active transport systems that are predicted to be involved in transport of amino acids, peptides, or inorganic ions. This subgroup has high sequence similarity to members of the family of hydrophobic amino acid transporters (HAAT), such as leucine-isoleucine-valine binding protein (LIVBP); however, their ligand specificity has not been determined experimentally. Pssm-ID: 380637 [Multi-domain] Cd Length: 302 Bit Score: 46.51 E-value: 1.68e-05
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| PBP1_YraM_LppC_lipoprotein-like | cd06339 | periplasmic binding component of lipoprotein LppC, an immunodominant antigen; This subgroup ... |
145-290 | 3.02e-05 | ||||||
periplasmic binding component of lipoprotein LppC, an immunodominant antigen; This subgroup includes periplasmic binding component of lipoprotein LppC, an immunodominant antigen, whose molecular function is not characterized. Members of this subgroup are predicted to be involved in transport of lipid compounds, and they are sequence similar to the family of ABC-type hydrophobic amino acid transporters (HAAT). Pssm-ID: 380562 [Multi-domain] Cd Length: 331 Bit Score: 45.72 E-value: 3.02e-05
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| PBP1_ABC_ligand_binding-like | cd06340 | type 1 periplasmic ligand-binding domain of uncharacterized ABC (ATPase Binding Cassette)-type ... |
145-213 | 9.54e-05 | ||||||
type 1 periplasmic ligand-binding domain of uncharacterized ABC (ATPase Binding Cassette)-type active transport systems predicted to be involved in transport of amino acids, peptides, or inorganic ions; This subgroup includes the type 1 periplasmic ligand-binding domain of uncharacterized ABC (ATPase Binding Cassette)-type active transport systems that are predicted to be involved in transport of amino acids, peptides, or inorganic ions. This subgroup has high sequence similarity to members of the family of hydrophobic amino acid transporters (HAAT), such as leucine-isoleucine-valine binding protein (LIVBP); however, their ligand specificity has not been determined experimentally. Pssm-ID: 380563 [Multi-domain] Cd Length: 352 Bit Score: 44.09 E-value: 9.54e-05
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| PBP1_NPR-like | cd06373 | Ligand binding domain of natriuretic peptide receptor (NPR) family; Ligand binding domain of ... |
76-298 | 2.73e-04 | ||||||
Ligand binding domain of natriuretic peptide receptor (NPR) family; Ligand binding domain of natriuretic peptide receptor (NPR) family which consists of three different subtypes: type A natriuretic peptide receptor (NPR-A, or GC-A), type B natriuretic peptide receptors (NPR-B, or GC-B), and type C natriuretic peptide receptor (NPR-C). There are three types of natriuretic peptide (NP) ligands specific to the receptors: atrial NP (ANP), brain or B-type NP (BNP), and C-type NP (CNP). The NP family is thought to have arisen through gene duplication during evolution and plays an essential role in cardiovascular and body fluid homeostasis. ANP and BNP bind mainly to NPR-A, while CNP binds specifically to NPR-B. Both NPR-A and NPR-B have guanylyl cyclase catalytic activity and produces intracellular secondary messenger cGMP in response to peptide-ligand binding. Consequently, the NPR-A activation results in vasodilation and inhibition of vascular smooth muscle cell proliferation. NPR-C acts as the receptor for all the three members of NP family, and functions as a clearance receptor. Unlike NPR-A and -B, NPR-C lacks an intracellular guanylyl cyclase domain and is thought to exert biological actions by sequestration of released natriuretic peptides and/or inhibition of adenylyl cyclase. Pssm-ID: 380596 [Multi-domain] Cd Length: 394 Bit Score: 43.03 E-value: 2.73e-04
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| PBP1_ABC_ligand_binding-like | cd06345 | type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type ... |
145-243 | 2.82e-04 | ||||||
type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems predicted to be involved in uptake of amino acids, peptides, or inorganic ions; This subgroup includes the type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems that are predicted to be involved in uptake of amino acids, peptides, or inorganic ions. This subgroup has high sequence similarity to members of the family of hydrophobic amino acid transporters (HAAT), such as leucine-isoleucine-valine binding protein (LIVBP); however, its ligand specificity has not been determined experimentally. Pssm-ID: 380568 [Multi-domain] Cd Length: 356 Bit Score: 42.64 E-value: 2.82e-04
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| PBP1_ABC_HAAT-like | cd06348 | type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type ... |
72-212 | 1.14e-03 | ||||||
type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems predicted to be involved in uptake of amino acids or peptides; This subgroup includes the type 1 periplasmic ligand-binding domain of uncharacterized ABC (Atpase Binding Cassette)-type active transport systems that are predicted to be involved in the uptake of amino acids or peptides. This subgroup has high sequence similarity to members of the family of hydrophobic amino acid transporters (HAAT), such as leucine-isoleucine-valine binding protein (LIVBP); however, its ligand specificity has not been determined experimentally. Pssm-ID: 380571 [Multi-domain] Cd Length: 342 Bit Score: 40.68 E-value: 1.14e-03
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| PBP1_iGluR_AMPA | cd06380 | N-terminal leucine-isoleucine-valine binding protein (LIVBP)-like domain of the AMPA receptor; ... |
78-216 | 1.85e-03 | ||||||
N-terminal leucine-isoleucine-valine binding protein (LIVBP)-like domain of the AMPA receptor; N-terminal leucine-isoleucine-valine binding protein (LIVBP)-like domain of the AMPA (alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid) receptor, a member of the glutamate-receptor ion channels (iGluRs). AMPA receptors are the major mediators of excitatory synaptic transmission in the central nervous system. While this N-terminal domain belongs to the periplasmic-binding fold type 1 superfamily, the glutamate-binding domain of the iGluR is structurally homologous to the periplasmic-binding fold type 2. The LIVBP-like domain of iGluRs is thought to play a role in the initial assembly of iGluR subunits, but it is not well understood how this domain is arranged and functions in intact iGluR. AMPA receptors consist of four types of subunits (GluR1, GluR2, GluR3, and GluR4) which combine to form a tetramer and play an important roles in mediating the rapid excitatory synaptic current. Pssm-ID: 380603 [Multi-domain] Cd Length: 390 Bit Score: 40.34 E-value: 1.85e-03
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| PBP1_As_SBP-like | cd06330 | periplasmic substrate-binding domain of active transport proteins; Periplasmic ... |
145-237 | 6.74e-03 | ||||||
periplasmic substrate-binding domain of active transport proteins; Periplasmic substrate-binding domain of active transport proteins found in bacteria and Archaea that is predicted to be involved in the efflux of toxic compounds. Members of this subgroup include proteins from Herminiimonas arsenicoxydans, which is resistant to arsenic (As) and various heavy metals such as cadmium and zinc. Moreover, they show significant sequence similarity to the cluster of AmiC and active transport systems for short-chain amides and urea (FmdDEF), and thus are likely to exhibit a ligand-binding mode similar to that of the amide sensor protein AmiC from Pseudomonas aeruginosa. Pssm-ID: 380553 [Multi-domain] Cd Length: 342 Bit Score: 38.31 E-value: 6.74e-03
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