PLAAT4
Function
Exhibits both phospholipase A1/2 and acyltransferase activities (PubMed:19615464, PubMed:22605381, PubMed:22825852, PubMed:26503625). Shows phospholipase A1 (PLA1) and A2 (PLA2), catalyzing the calcium-independent release of fatty acids from the sn-1 or sn-2 position of glycerophospholipids (PubMed:19615464, PubMed:22605381, PubMed:22825852). For most substrates, PLA1 activity is much higher than PLA2 activity (PubMed:19615464). Shows O-acyltransferase activity, catalyzing the transfer of a fatty acyl group from glycerophospholipid to the hydroxyl group of lysophospholipid (PubMed:19615464). Shows N-acyltransferase activity, catalyzing the calcium-independent transfer of a fatty acyl group at the sn-1 position of phosphatidylcholine (PC) and other glycerophospholipids to the primary amine of phosphatidylethanolamine (PE), forming N-acylphosphatidylethanolamine (NAPE), which serves as precursor for N-acylethanolamines (NAEs) (PubMed:19615464, PubMed:22605381, PubMed:22825852). Promotes keratinocyte differentiation via activation of TGM1 (PubMed:17762858).
Sequence Similarities
Belongs to the H-rev107 family.
Tissue Specificity
Widely expressed.
Cellular localization
- Membrane
- Single-pass membrane protein
Alternative names
RARRES3, RIG1, TIG3, PLAAT4, Phospholipase A and acyltransferase 4, HRAS-like suppressor 4, RAR-responsive protein TIG3, Retinoic acid receptor responder protein 3, Retinoid-inducible gene 1 protein, Tazarotene-induced gene 3 protein, HRSL4