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IPR011710 is a Coatomer beta subunit, C-terminal.
<p>This entry represents the C-terminal domain of the beta subunit from coatomer proteins (Beta-coat proteins). The C-terminal domain probably adapts the function of the N-terminal [interpro:IPR002553] domain. Coatomer protein complex I (COPI)-coated vesicles are involved in transport between the endoplasmic reticulum and the Golgi but also participate in transport from early to late endosomes within the endocytic pathway [[cite:PUB00033346]].</p> <p>Proteins synthesised on the ribosome and processed in the endoplasmic reticulum are transported from the Golgi apparatus to the trans-Golgi network (TGN), and from there via small carrier vesicles to their final destination compartment. This traffic is bidirectional, to ensure that proteins required to form vesicles are recycled. Vesicles have specific coat proteins (such as clathrin or coatomer) that are important for cargo selection and direction of transfer [[cite:PUB00035769], [cite:PUB00103198]]. While clathrin mediates endocytic protein transport, and transport from ER to Golgi, coatomers primarily mediate intra-Golgi transport, as well as the reverse Golgi to ER transport of dilysine-tagged proteins [[cite:PUB00030524]]. For example, the coatomer COP1 (coat protein complex 1) is responsible for reverse transport of recycled proteins from Golgi and pre-Golgi compartments back to the ER, while COPII buds vesicles from the ER to the Golgi [[cite:PUB00035767]]. Coatomers reversibly associate with Golgi (non-clathrin-coated) vesicles to mediate protein transport and for budding from Golgi membranes [[cite:PUB00035768]]. COPI coated vesicle assembly is initiated by recruitment of the small GTPase Arf1 which recruits the coatomer protein complex from the cytoplasm and anchors it at the membrane. Then, Arf1 is activated by a guanine exchange factor and hydrolyses GTP to mediate uncoating of the vesicle which subsequently fuses with its target membrane [[cite:PUB00103198], [cite:PUB00100149]]. As coat proteins polymerise, vesicles are formed and budded from membrane-bound organelles. Coatomer complexes also influence Golgi structural integrity, as well as the processing, activity, and endocytic recycling of LDL receptors. In mammals, coatomer complexes can only be recruited by membranes associated to ADP-ribosylation factors (ARFs), which are small GTP-binding proteins. Coatomer complexes are hetero-oligomers composed of at least an alpha, beta, beta', gamma, delta, epsilon and zeta subunits, and can be subdivided into an outer-coat and an adaptor subcomplex [[cite:PUB00103198]].</p>
This description is obtained from EB-eye REST.
GO predictions are based solely on the InterPro-to-GO mappings published by EMBL-EBI, which are in turn based on the mapping of predicted domains to the InterPro dataset. The InterPro-to-GO mapping was last updated on , while the GO metadata was last updated on .
| GO term | Namespace | Name | Definition | Relationships |
|---|---|---|---|---|
| Molecular function | Structural molecule activity | The action of a molecule that contributes to the structural integrity of a complex or its assembly within or outside a cell. | ||
| Biological process | Intracellular protein transport | The directed movement of proteins in a cell, including the movement of proteins between specific compartments or structures within a cell, such as organelles of a eukaryotic cell. | ||
| Biological process | Vesicle-mediated transport | A cellular transport process in which transported substances are moved in membrane-bounded vesicles; transported substances are enclosed in the vesicle lumen or located in the vesicle membrane. The process begins with a step that directs a substance to the forming vesicle, and includes vesicle budding and coating. Vesicles are then targeted to, and fuse with, an acceptor membrane. | ||
| Cellular component | COPI vesicle coat | One of two multimeric complexes that forms a membrane vesicle coat. The mammalian COPI subunits are called alpha-, beta-, beta'-, gamma-, delta-, epsilon- and zeta-COP. Vesicles with COPI coats are found associated with Golgi membranes at steady state. |
| Transcript | Name | Description | Predicted domains | Domain count |
|---|---|---|---|---|
| – | PREDICTED: coatomer subunit beta-1-like [Glycine max] gi|356521768|ref|XP_003529523.1| | 16 | ||
| – | Coatomer subunit beta; TAIR: AT4G31480.1 Coatomer, beta subunit; Swiss-Prot: sp|Q9SV21|COPB1_ARATH Coatomer subunit beta-1; TrEMBL-Plants: tr|I1KG56|I1KG56_SOYBN Coatomer subunit beta; Found in the gene: LotjaGi3g1v0344700 | 16 |
A list of co-occurring predicted domains within the L. japonicus gene space:
| Predicted domain | Source | Observations | Saturation (%) |
|---|---|---|---|
| TRANSMEMBRANE | Phobius | 1 | 50.00 |