The sequences found in this family are similar to PGAP1 (Swiss:Q765A7). This is an endoplasmic reticulum membrane protein with a catalytic serine containing motif that is conserved in a number of lipases. PGAP1 functions as a GPI inositol-deacylase; this deacylation is important for the efficient transport of GPI-anchored proteins from the endoplasmic reticulum to the Golgi body [1]. This entry also includes Tgl2, a mitochondria protein that serves as a triacylglycerol lipase in budding yeasts [2].

1: Inositol deacylation of glycosylphosphatidylinositol-anchored proteins is mediated by mammalian PGAP1 and yeast Bst1p. Tanaka S, Maeda Y, Tashima Y, Kinoshita T; J Biol Chem. 2004;279:14256-14263. PMID:14734546

2: The TGL2 gene of Saccharomyces cerevisiae encodes an active acylglycerol lipase located in the mitochondria. Ham HJ, Rho HJ, Shin SK, Yoon HJ; J Biol Chem. 2010;285:3005-3013. PMID:19959834