SEC14 cytosolic factor

UniProtKB accession:  P24280

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Required for transport of secretory proteins from the Golgi complex. Catalyzes the transfer of phosphatidylinositol (PI) and phosphatidylcholine (PC) between membranes in vitro. Essential for viability and secretion (PubMed:2215682, PubMed:2466847). Exchanges its bound phospholipid with phospholipid monomers that reside in membrane bilayers (PubMed:16997918). Regulates specific trans-Golgi export pathways, like transport from endosomes to the trans-Golgi or transport from the plasma membrane to the vacuole at the level of the endosome (PubMed:19129178). Increased membrane curvature and lipid unsaturation levels at the trans-Golgi membrane promotes membrane binding and phospholipid transfer of SEC14. Thus, SEC14 may act at the trans-Golgi membrane to exchange lipids and promote vesicle formation (PubMed:32828847). The phosphatidylcholine-bound form of SEC14 represses the CDP-choline pathway activity by inhibiting CCTase, the rate-determining enzyme of the CDP-choline pathway (PubMed:7816798). PI binding/transfer is dispensable for function in vivo (PubMed:10488334). Required for trafficking and localization of lipid raft proteins to the plasma membrane (PubMed:23383173).