2lkt

Structural highlights

Function

PLAT4_HUMAN 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).^{[1] [2] [3] [4] [5]}

References

1. ↑ Jans R, Sturniolo MT, Eckert RL. Localization of the TIG3 transglutaminase interaction domain and demonstration that the amino-terminal region is required for TIG3 function as a keratinocyte differentiation regulator. J Invest Dermatol. 2008 Mar;128(3):517-29. doi: 10.1038/sj.jid.5701035. Epub 2007, Aug 30. PMID:17762858 doi:http://dx.doi.org/10.1038/sj.jid.5701035
2. ↑ Uyama T, Jin XH, Tsuboi K, Tonai T, Ueda N. Characterization of the human tumor suppressors TIG3 and HRASLS2 as phospholipid-metabolizing enzymes. Biochim Biophys Acta. 2009 Dec;1791(12):1114-24. doi:, 10.1016/j.bbalip.2009.07.001. Epub 2009 Jul 14. PMID:19615464 doi:http://dx.doi.org/10.1016/j.bbalip.2009.07.001
3. ↑ Golczak M, Kiser PD, Sears AE, Lodowski DT, Blaner WS, Palczewski K. Structural Basis for the Acyltransferase Activity of Lecithin:Retinol Acyltransferase-like Proteins. J Biol Chem. 2012 Jul 6;287(28):23790-807. Epub 2012 May 17. PMID:22605381 doi:10.1074/jbc.M112.361550
4. ↑ Uyama T, Ikematsu N, Inoue M, Shinohara N, Jin XH, Tsuboi K, Tonai T, Tokumura A, Ueda N. Generation of N-acylphosphatidylethanolamine by members of the phospholipase A/acyltransferase (PLA/AT) family. J Biol Chem. 2012 Sep 14;287(38):31905-19. doi: 10.1074/jbc.M112.368712. Epub, 2012 Jul 23. PMID:22825852 doi:http://dx.doi.org/10.1074/jbc.M112.368712
5. ↑ Mardian EB, Bradley RM, Duncan RE. The HRASLS (PLA/AT) subfamily of enzymes. J Biomed Sci. 2015 Oct 26;22:99. doi: 10.1186/s12929-015-0210-7. PMID:26503625 doi:http://dx.doi.org/10.1186/s12929-015-0210-7