FUNCTION: Phospholipid scramblase involved in autophagy by mediating autophagosomal membrane expansion (PubMed:22456507, PubMed:27510922, PubMed:29437695, PubMed:32513819, PubMed:33468622, PubMed:33850023, PubMed:32610138, PubMed:33106659). Cycles between the preautophagosomal structure/phagophore a...
FUNCTION: Phospholipid scramblase involved in autophagy by mediating autophagosomal membrane expansion (PubMed:22456507, PubMed:27510922, PubMed:29437695, PubMed:32513819, PubMed:33468622, PubMed:33850023, PubMed:32610138, PubMed:33106659). Cycles between the preautophagosomal structure/phagophore assembly site (PAS) and the cytoplasmic vesicle pool and supplies membrane for the growing autophagosome (PubMed:16940348, PubMed:22456507, PubMed:33106659). Lipid scramblase activity plays a key role in preautophagosomal structure/phagophore assembly by distributing the phospholipids that arrive through ATG2 (ATG2A or ATG2B) from the cytoplasmic to the luminal leaflet of the bilayer, thereby driving autophagosomal membrane expansion (PubMed:33106659). Also required to supply phosphatidylinositol 4-phosphate to the autophagosome initiation site by recruiting the phosphatidylinositol 4-kinase beta (PI4KB) in a process dependent on ARFIP2, but not ARFIP1 (PubMed:30917996). In addition to autophagy, also plays a role in necrotic cell death (By similarity). {ECO:0000250|UniProtKB:Q68FE2, ECO:0000269|PubMed:16940348, ECO:0000269|PubMed:22456507, ECO:0000269|PubMed:27510922, ECO:0000269|PubMed:29437695, ECO:0000269|PubMed:30917996, ECO:0000269|PubMed:32513819, ECO:0000269|PubMed:32610138, ECO:0000269|PubMed:33106659, ECO:0000269|PubMed:33468622, ECO:0000269|PubMed:33850023}.
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GO - Biological processes (BP):
autophagosome assembly [GO:0000045]; autophagy of mitochondrion [GO:0000422]; bone morphogenesis [GO:0060349]; late nucleophagy [GO:0044805]; positive regulation of necrotic cell death [GO:0010940]; protein localization to phagophore assembly site [GO:0034497]...
autophagosome assembly [GO:0000045]; autophagy of mitochondrion [GO:0000422]; bone morphogenesis [GO:0060349]; late nucleophagy [GO:0044805]; positive regulation of necrotic cell death [GO:0010940]; protein localization to phagophore assembly site [GO:0034497]
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GO - Molecular function (MF):
phospholipid scramblase activity [GO:0017128]...
phospholipid scramblase activity [GO:0017128]
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GO - Cellular component (CC):
autophagosome [GO:0005776]; endoplasmic reticulum membrane [GO:0005789]; endosome [GO:0005768]; Golgi apparatus [GO:0005794]; Golgi membrane [GO:0000139]; integral component of membrane [GO:0016021]; intracellular membrane-bounded organelle [GO:0043231]; late endosome [GO:0005770]; late endosome mem...
autophagosome [GO:0005776]; endoplasmic reticulum membrane [GO:0005789]; endosome [GO:0005768]; Golgi apparatus [GO:0005794]; Golgi membrane [GO:0000139]; integral component of membrane [GO:0016021]; intracellular membrane-bounded organelle [GO:0043231]; late endosome [GO:0005770]; late endosome membrane [GO:0031902]; membrane [GO:0016020]; mitochondrion [GO:0005739]; phagophore assembly site [GO:0000407]; phagophore assembly site membrane [GO:0034045]; recycling endosome [GO:0055037]; recycling endosome membrane [GO:0055038]; trans-Golgi network [GO:0005802]
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