Biology:GAPVD1

From HandWiki

GTPase activating protein and VPS9 domains 1, also known as GAPVD1, Gapex-5 and RME-6 is a protein which in humans is encoded by the GAPVD1 gene.[1][2]

Function

GAPVD1 is Rab GTPase guanine nucleotide exchange factor essential for activation of RAB5A during engulfment of apoptotic cells.[3] GAPVD1 is also involved in the degradation of the epidermal growth factor receptor.[4] Gapex-5 mediated activation of Rab5 has been implicated in the insulin stimulated formation of plasma membrane phosphatidylinositol-3-phosphate.[5]

Structure

Based on sequence homology, mammalian Gapex-5 has been shown to have an amino-terminal Ras GAP domain, a central polyproline (SH3 binding) region and a carboxy-terminal Rab GEF domain. The RabGEF domain has been suggested to activate Rab5[6] and Rab31.[7]

References

  1. "Entrez Gene: GAPVD1 GTPase activating protein and VPS9 domains 1". https://www.ncbi.nlm.nih.gov/gene?Db=gene&Cmd=ShowDetailView&TermToSearch=26130. 
  2. "Rab5-activating protein 6, a novel endosomal protein with a role in endocytosis". Biochem. Biophys. Res. Commun. 340 (3): 967–75. February 2006. doi:10.1016/j.bbrc.2005.12.099. PMID 16410077. 
  3. "Imaging of Rab5 activity identifies essential regulators for phagosome maturation". Nature 453 (7192): 241–5. May 2008. doi:10.1038/nature06857. PMID 18385674. Bibcode2008Natur.453..241K. 
  4. "GAPex-5 mediates ubiquitination, trafficking, and degradation of epidermal growth factor receptor". J. Biol. Chem. 282 (29): 21278–84. July 2007. doi:10.1074/jbc.M703725200. PMID 17545148. 
  5. "Insulin Stimulates Phosphatidylinositol 3-Phosphate Production via the Activation of Rab5". Mol. Biol. Cell 19 (7): 2718–28. July 2008. doi:10.1091/mbc.E08-01-0105. PMID 18434594. 
  6. "Insulin-stimulated Interaction between insulin receptor substrate 1 and p85alpha and activation of protein kinase B/Akt require Rab5". J. Biol. Chem. 281 (38): 27982–90. September 2006. doi:10.1074/jbc.M602873200. PMID 16880210. 
  7. "Gapex-5, a Rab31 Guanine Nucleotide Exchange Factor that Regulates Glut4 Trafficking in Adipocytes". Cell Metab. 5 (1): 59–72. January 2007. doi:10.1016/j.cmet.2006.12.006. PMID 17189207. 

Further reading