Tbio COPA Coatomer subunit alpha

Protein Summary

Description

The coatomer is 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. Coatomer complex is required for budding from Golgi membranes, and is essential for the retrograde Golgi-to-ER transport of dilysine-tagged proteins. In mammals, the coatomer can only be recruited by membranes associated to ADP-ribosylation factors (ARFs), which are small GTP-binding proteins; the complex also influences the Golgi structural integrity, as well as the processing, activity, and endocytic recycling of LDL receptors (By similarity). Xenin stimulates exocrine pancreatic secretion. It inhibits pentagastrin-stimulated secretion of acid, to induce exocrine pancreatic secretion and to affect small and large intestinal motility. In the gut, xenin interacts with the neurotensin receptor. In eukaryotic cells, protein transport between the endoplasmic reticulum and Golgi compartments is mediated in part by non-clathrin-coated vesicular coat proteins (COPs). Seven coat proteins have been identified, and they represent subunits of a complex known as coatomer. The subunits are designated alpha-COP, beta-COP, beta-prime-COP, gamma-COP, delta-COP, epsilon-COP, and zeta-COP. The alpha-COP, encoded by COPA, shares high sequence similarity with RET1P, the alpha subunit of the coatomer complex in yeast. Also, the N-terminal 25 amino acids of alpha-COP encode the bioactive peptide, xenin, which stimulates exocrine pancreatic secretion and may act as a gastrointestinal hormone. Alternative splicing results in multiple splice forms encoding distinct isoforms. [provided by RefSeq, Jul 2008]

Uniprot Accession IDs

• P53621
• Q5T201
• Q8IXZ9

Gene Name

• COPA

Ensembl ID

• ENST00000241704
• ENSP00000241704
• ENSG00000122218
• ENST00000368069
• ENSP00000357048

Symbol

• AILJK
• HEP-COP
• alpha-COP

Knowledge Table

Most Knowledge About	Knowledge Value (0 to 1 scale)
interacting protein	1
virus perturbation	1
disease perturbation	0.99
protein domain	0.99
transcription factor perturbation	0.88

Protein Classes

PANTHER Classes

Protein / Membrane Traffic Protein / Vesicle Coat Protein / Coatomer Subunit Alpha

DTO Classes

Protein / Transporter / Vesicle Coat Protein / Coatomer Subunit Alpha

IDG Development Level Summary

Tdark

These are targets about which virtually nothing is known. They do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 60.04   (req: < 5)

Gene RIFs: 20   (req: <= 3)

Antibodies: 124   (req: <= 50)

Tbio

These targets do not have known drug or small molecule activities
- AND - satisfy two or more of the following criteria:

Pubmed score: 60.04   (req: >= 5)

Gene RIFs: 20   (req: > 3)

Antibodies: 124   (req: > 50)

- OR - satisfy the following criterion:

Gene Ontology Terms: 7

Tchem

Target has at least one ChEMBL compound with an activity cutoff of < 30 nM - AND - satisfies the preceding conditions

Active Ligand: 0

Tclin

Target has at least one approved drug - AND - satisfies the preceding conditions

Active Drug: 0