coat protein (coatomer) delta, isoform B [Drosophila melanogaster]
Protein Classification
coatomer subunit delta( domain architecture ID 13000608)
coatomer subunit delta is a component of the coatomer, a cytosolic protein complex that binds to dilysine motifs and reversibly associates with Golgi non-clathrin-coated vesicles, which further mediate biosynthetic protein transport from the ER, via the Golgi up to the trans Golgi network
List of domain hits
| Name | Accession | Description | Interval | E-value | ||||
| AP_delta-COPI_MHD | cd09254 | Mu homology domain (MHD) of adaptor protein (AP) coat protein I (COPI) delta subunit; COPI ... |
291-528 | 1.02e-113 | ||||
Mu homology domain (MHD) of adaptor protein (AP) coat protein I (COPI) delta subunit; COPI complex-coated vesicles function in the early secretory pathway. They mediate the retrograde transport from the Golgi to the ER, and intra-Golgi transport. COPI complex-coated vesicles consist of a small GTPase, ADP-ribosylation factor 1 (ARF1) and a heteroheptameric coatomer composed of two subcomplexes, F-COPI and B-COPI. ARF1 regulates COPI vesicle formation by recruiting the coatomer onto Golgi membranes to initiate its coat function. Coatomer complexes then bind cargo molecules and self-assemble to form spherical cages that yield COPI-coated vesicles. The heterotetrameric F-COPI subcomplex contains beta-, gamma-, delta-, and zeta-COP subunits, where beta- and gamma-COP subunits are related to the large AP subunits, and delta- and zeta-COP subunits are related to the medium and small AP subunits, respectively. Due to the sequence similarity to the AP complexes, the F-COPI subcomplex might play a role in the cargo-binding. The heterotrimeric B-COPI contains alpha-, beta-, and epsilon-COP subunits, which are not related to the adaptins. This subcomplex is thought to participate in the cage-forming and might serve a function similar to that of clathrin. This family corresponds to the mu homology domain of delta-subunit of COPI complex (delta-COP), which is distantly related to the C-terminal domain of mu chains among AP complexes. The delta-COP subunit appears tightly associated with the beta-COP subunit to confer its interaction with ARF1. In addition, both delta- and beta-COP subunits contribute to a common binding site for arginine (R)-based signals, which are sorting motifs conferring transient endoplasmic reticulum (ER) localization to unassembled subunits of multimeric membrane proteins. : Pssm-ID: 271162 Cd Length: 237 Bit Score: 336.51 E-value: 1.02e-113
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| Delta_COP_N | cd14830 | delta subunit of the F-COPI complex, N-terminal domain; Delta subunit of the heterotetrameric ... |
4-133 | 1.39e-85 | ||||
delta subunit of the F-COPI complex, N-terminal domain; Delta subunit of the heterotetrameric F-COPI complex, which consists of one beta-, one gamma-, one delta-, and one zeta subunit, where beta- and gamma- subunits are related to the large adaptor protein (AP) complex subunits, and delta- and zeta- subunits are related to the medium and small AP subunits, respectively. F-COPI forms a coatomer together with the B-COPI subcomplex, which assembles with a small GTPase, ADP-ribosylation factor 1 (ARF1), playing an important role in the formation of COPI complex-coated vesicles. COPI complex-coated vesicles function in the early secretory pathway mediating the retrograde transport from the Golgi to the ER, and intra-Golgi transport. : Pssm-ID: 341434 Cd Length: 130 Bit Score: 260.53 E-value: 1.39e-85
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| Name | Accession | Description | Interval | E-value | ||||
| AP_delta-COPI_MHD | cd09254 | Mu homology domain (MHD) of adaptor protein (AP) coat protein I (COPI) delta subunit; COPI ... |
291-528 | 1.02e-113 | ||||
Mu homology domain (MHD) of adaptor protein (AP) coat protein I (COPI) delta subunit; COPI complex-coated vesicles function in the early secretory pathway. They mediate the retrograde transport from the Golgi to the ER, and intra-Golgi transport. COPI complex-coated vesicles consist of a small GTPase, ADP-ribosylation factor 1 (ARF1) and a heteroheptameric coatomer composed of two subcomplexes, F-COPI and B-COPI. ARF1 regulates COPI vesicle formation by recruiting the coatomer onto Golgi membranes to initiate its coat function. Coatomer complexes then bind cargo molecules and self-assemble to form spherical cages that yield COPI-coated vesicles. The heterotetrameric F-COPI subcomplex contains beta-, gamma-, delta-, and zeta-COP subunits, where beta- and gamma-COP subunits are related to the large AP subunits, and delta- and zeta-COP subunits are related to the medium and small AP subunits, respectively. Due to the sequence similarity to the AP complexes, the F-COPI subcomplex might play a role in the cargo-binding. The heterotrimeric B-COPI contains alpha-, beta-, and epsilon-COP subunits, which are not related to the adaptins. This subcomplex is thought to participate in the cage-forming and might serve a function similar to that of clathrin. This family corresponds to the mu homology domain of delta-subunit of COPI complex (delta-COP), which is distantly related to the C-terminal domain of mu chains among AP complexes. The delta-COP subunit appears tightly associated with the beta-COP subunit to confer its interaction with ARF1. In addition, both delta- and beta-COP subunits contribute to a common binding site for arginine (R)-based signals, which are sorting motifs conferring transient endoplasmic reticulum (ER) localization to unassembled subunits of multimeric membrane proteins. Pssm-ID: 271162 Cd Length: 237 Bit Score: 336.51 E-value: 1.02e-113
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| Delta_COP_N | cd14830 | delta subunit of the F-COPI complex, N-terminal domain; Delta subunit of the heterotetrameric ... |
4-133 | 1.39e-85 | ||||
delta subunit of the F-COPI complex, N-terminal domain; Delta subunit of the heterotetrameric F-COPI complex, which consists of one beta-, one gamma-, one delta-, and one zeta subunit, where beta- and gamma- subunits are related to the large adaptor protein (AP) complex subunits, and delta- and zeta- subunits are related to the medium and small AP subunits, respectively. F-COPI forms a coatomer together with the B-COPI subcomplex, which assembles with a small GTPase, ADP-ribosylation factor 1 (ARF1), playing an important role in the formation of COPI complex-coated vesicles. COPI complex-coated vesicles function in the early secretory pathway mediating the retrograde transport from the Golgi to the ER, and intra-Golgi transport. Pssm-ID: 341434 Cd Length: 130 Bit Score: 260.53 E-value: 1.39e-85
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| Adap_comp_sub | pfam00928 | Adaptor complexes medium subunit family; This family also contains members which are coatomer ... |
290-495 | 1.19e-31 | ||||
Adaptor complexes medium subunit family; This family also contains members which are coatomer subunits. Pssm-ID: 395742 Cd Length: 259 Bit Score: 122.80 E-value: 1.19e-31
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| Name | Accession | Description | Interval | E-value | ||||
| AP_delta-COPI_MHD | cd09254 | Mu homology domain (MHD) of adaptor protein (AP) coat protein I (COPI) delta subunit; COPI ... |
291-528 | 1.02e-113 | ||||
Mu homology domain (MHD) of adaptor protein (AP) coat protein I (COPI) delta subunit; COPI complex-coated vesicles function in the early secretory pathway. They mediate the retrograde transport from the Golgi to the ER, and intra-Golgi transport. COPI complex-coated vesicles consist of a small GTPase, ADP-ribosylation factor 1 (ARF1) and a heteroheptameric coatomer composed of two subcomplexes, F-COPI and B-COPI. ARF1 regulates COPI vesicle formation by recruiting the coatomer onto Golgi membranes to initiate its coat function. Coatomer complexes then bind cargo molecules and self-assemble to form spherical cages that yield COPI-coated vesicles. The heterotetrameric F-COPI subcomplex contains beta-, gamma-, delta-, and zeta-COP subunits, where beta- and gamma-COP subunits are related to the large AP subunits, and delta- and zeta-COP subunits are related to the medium and small AP subunits, respectively. Due to the sequence similarity to the AP complexes, the F-COPI subcomplex might play a role in the cargo-binding. The heterotrimeric B-COPI contains alpha-, beta-, and epsilon-COP subunits, which are not related to the adaptins. This subcomplex is thought to participate in the cage-forming and might serve a function similar to that of clathrin. This family corresponds to the mu homology domain of delta-subunit of COPI complex (delta-COP), which is distantly related to the C-terminal domain of mu chains among AP complexes. The delta-COP subunit appears tightly associated with the beta-COP subunit to confer its interaction with ARF1. In addition, both delta- and beta-COP subunits contribute to a common binding site for arginine (R)-based signals, which are sorting motifs conferring transient endoplasmic reticulum (ER) localization to unassembled subunits of multimeric membrane proteins. Pssm-ID: 271162 Cd Length: 237 Bit Score: 336.51 E-value: 1.02e-113
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| Delta_COP_N | cd14830 | delta subunit of the F-COPI complex, N-terminal domain; Delta subunit of the heterotetrameric ... |
4-133 | 1.39e-85 | ||||
delta subunit of the F-COPI complex, N-terminal domain; Delta subunit of the heterotetrameric F-COPI complex, which consists of one beta-, one gamma-, one delta-, and one zeta subunit, where beta- and gamma- subunits are related to the large adaptor protein (AP) complex subunits, and delta- and zeta- subunits are related to the medium and small AP subunits, respectively. F-COPI forms a coatomer together with the B-COPI subcomplex, which assembles with a small GTPase, ADP-ribosylation factor 1 (ARF1), playing an important role in the formation of COPI complex-coated vesicles. COPI complex-coated vesicles function in the early secretory pathway mediating the retrograde transport from the Golgi to the ER, and intra-Golgi transport. Pssm-ID: 341434 Cd Length: 130 Bit Score: 260.53 E-value: 1.39e-85
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| AP_longin-like | cd14823 | Longin-like domains of AP complex subunits; AP complex sigma subunits are part of the ... |
5-133 | 1.75e-42 | ||||
Longin-like domains of AP complex subunits; AP complex sigma subunits are part of the heterotetrameric adaptor protein (AP) complex which consists of one large subunit (alpha-, gamma-, delta- or epsilon), one beta-, one mu-, and one sigma-subunit. In general, AP complexes link the cytosolic domains of the cargo proteins to the protein coat that induces vesicle budding in the donor compartment during vesicle transport. In most cases the coat protein is clathrin (AP1 and AP2 complex), but some of the other members of the AP complex family are associated with nonclathrin coats. The sigma subunit is comprised of a single longin domain and plays a role in binding dileucine-based sorting signals. Pssm-ID: 341427 Cd Length: 131 Bit Score: 148.05 E-value: 1.75e-42
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| AP_MHD_Cterm | cd07954 | C-terminal domain of adaptor protein (AP) complexes medium mu subunits and its homologs (MHD); ... |
292-496 | 2.72e-35 | ||||
C-terminal domain of adaptor protein (AP) complexes medium mu subunits and its homologs (MHD); This family corresponds to the C-terminal domain of heterotetrameric AP complexes medium mu subunits and its homologs existing in monomeric stonins, delta-subunit of the heteroheptameric coat protein I (delta-COPI), a protein encoded by a pro-death gene referred as MuD (also known as MUDENG, mu-2 related death-inducing gene), an endocytic adaptor syp1, the mammalian FCH domain only proteins (FCHo1/2), SH3-containing GRB2-like protein 3-interacting protein 1 (SGIP1), and related proteins. AP complexes participate in the formation of intracellular coated transport vesicles and select cargo molecules for incorporation into the coated vesicles in the late secretory and endocytic pathways. Stonins have been characterized as clathrin-dependent AP-2 mu chain related factors and may act as cargo-specific sorting adaptors in endocytosis. Coat protein complex I (COPI)-coated vesicles function in the early secretory pathway. They mediate the retrograde transport from the Golgi to the ER, and intra-Golgi transport. MuD is distantly related to the C-terminal domain of mu2 subunit of AP-2. It is able to induce cell death by itself and plays an important role in cell death in various tissues. Syp1 represents a novel type of endocytic adaptor protein that participates in endocytosis, promotes vesicle tabulation, and contributes to cell polarity and stress responses. It shares the same domain architecture with its two ubiquitously expressed mammalian counterparts, FCHo1/2, which represent key initial proteins ultimately controlling cellular nutrient uptake, receptor regulation, and synaptic vesicle retrieval. They bind specifically to the plasma membrane and recruit the scaffold proteins eps15 and intersectin, which subsequently engage the adaptor complex AP2 and clathrin, leading to coated vesicle formation. Another mammalian neuronal-specific protein SGIP1 does have a C-terminal MHD and has been classified into this family as well. It is an endophilin-interacting protein that plays an obligatory role in the regulation of energy homeostasis. It is also involved in clathrin-mediated endocytosis by interacting with phospholipids and eps15. Pssm-ID: 271157 Cd Length: 245 Bit Score: 132.53 E-value: 2.72e-35
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| Adap_comp_sub | pfam00928 | Adaptor complexes medium subunit family; This family also contains members which are coatomer ... |
290-495 | 1.19e-31 | ||||
Adaptor complexes medium subunit family; This family also contains members which are coatomer subunits. Pssm-ID: 395742 Cd Length: 259 Bit Score: 122.80 E-value: 1.19e-31
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| AP-3_Mu3_Cterm | cd09252 | C-terminal domain of medium Mu3 subunit in adaptor protein (AP) complex AP-3; AP complexes ... |
423-492 | 3.68e-06 | ||||
C-terminal domain of medium Mu3 subunit in adaptor protein (AP) complex AP-3; AP complexes participate in the formation of intracellular coated transport vesicles and select cargo molecules for incorporation into the coated vesicles in the late secretory and endocytic pathways. There are four AP complexes, AP-1, AP-2, AP-3, and AP-4, described in various eukaryotic organisms. Each AP complex consists of four subunits: two large chains (one each of gamma/alpha/delta/epsilon and beta1-4, respectively), a medium mu chain (mu1-4), and a small sigma chain (sigma1-4). Each of the four subunits from the different AP complexes exhibits similarity with each other. This family corresponds to the C-terminal domain of heterotetrameric adaptor protein complex 3 (AP-3) medium mu3 subunit, which includes two closely related homologs, mu3A (P47A, encoded by ap3m1) and mu1B (P47B, encoded by ap3m2). Mu3A is ubiquitously expressed, but mu3B is specifically expressed in neurons and neuroendocrine cells. AP-3 is particularly important for targeting integral membrane proteins to lysosomes and lysome-related organelles at trans-Golgi network (TGN) and/or endosomes, such as the yeast vacuole, fly pigment granules and mammalian melanosomes, platelet dense bodies and the secretory lysosomes of cytotoxic T lymphocytes. Unlike AP-1 and AP-2, which function in conjunction with clathrin which is a scaffolding protein participating in the formation of coated vesicles, the nature of the outer shell of AP-3 containing coats remains to be elucidated. Membrane-anchored cargo molecules interact with adaptors through short sorting signals in their cytosolic segments. Tyrosine-based endocytotic signals are one of the most important sorting signals. They are of the form Y-X-X-Phi, where Y is tyrosine, X is any amino acid and Phi is a bulky hydrophobic residue that can be Leu, Ile, Met, Phe, or Val. These kinds of sorting signals can be recognized by the C-terminal domain of AP-3 mu3 subunit, also known as Y-X-X-Phi signal-binding domain that contains two hydrophobic pockets, one for the tyrosine-binding and one for the bulky hydrophobic residue-binding. Pssm-ID: 271160 Cd Length: 251 Bit Score: 48.35 E-value: 3.68e-06
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| FCHo1_MHD | cd09268 | mu-homology domain (MHD) of F-BAR domain-containing Fer/Cip4 homology domain-only protein 1 ... |
377-495 | 7.77e-04 | ||||
mu-homology domain (MHD) of F-BAR domain-containing Fer/Cip4 homology domain-only protein 1 (FCH domain only 1 or FCHo1, also known as KIAA0290) and similar proteins; This family corresponds to the MHD found in ubiquitously expressed mammalian membrane-sculpting FCHo1 and similar proteins. FCHo1 represents a key initial protein that ultimately controls cellular nutrient uptake, receptor regulation, and synaptic vesicle retrieval. It is required for plasma membrane clathrin-coated vesicle (CCV) budding and marks sites of CCV formation. It binds specifically to the plasma membrane and recruits the scaffold proteins eps15 and intersectin, which subsequently engage the adaptor complex AP2 and clathrin, leading to coated vesicle formation. FCHo1 contains an N-terminal EFC/F-BAR domain, a proline-rich domain (PRD) in the middle region, and a C-terminal MHD. The crescent-shaped EFC/F-BAR domain can form an antiparallel dimer structure that binds PtdIns(4,5)P2-enriched membranes and can polymerize into rings to generate membrane tubules. The MHD is structurally related to the cargo-binding mu2 subunit of adaptor complex 2 (AP-2) and is responsible for the binding of eps15 and intersectin. Unlike other F-BAR domain containing proteins, FCHo1 has neither the Src homology 3 (SH3) domain nor any other known domain for interaction with dynamin and actin cytoskeleton. However, it can periodically accumulate at the budding site of clathrin. FCHo1 may utilize a unique action mode for vesicle formation as compared with other F-BAR proteins. Pssm-ID: 271173 Cd Length: 265 Bit Score: 41.49 E-value: 7.77e-04
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| AP1_Mu_N | cd14835 | AP-1 complex subunit mu N-terminal domain; AP-1 complex mu subunit is part of the ... |
12-140 | 1.69e-03 | ||||
AP-1 complex subunit mu N-terminal domain; AP-1 complex mu subunit is part of the heterotetrameric adaptor protein (AP)-1 complex which consists of one large gamma-, one beta-, one mu-, and one sigma-subunit. AP complexes link the cytosolic domains of the cargo proteins to the protein coat that induces vesicle budding in the donor compartment during vesicle transport. In the case of AP-1 the coat protein is clathrin. AP-1 binds the phospholipid PI(4)P which plays a role in its localisation to the trans-Golgi network (TGN)/endosome. The mu subunit is comprised of an N-terminal longin domain followed by a C-terminal domain which is involved in the binding of the Y-X-X-Phi sorting signal. Pssm-ID: 341439 Cd Length: 139 Bit Score: 38.68 E-value: 1.69e-03
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