LYCAT is an acyl-CoA:lysocardiolipin acyltransferase. It possesses both lysophosphatidylinositol acyltransferase (LPIAT) and lysophosphatidylglycerol acyltransferase (LPGAT) activities. LYCAT recognizes both monolysocardiolipin and dilysocardiolipin as substrates with a preference for linoleoyl-CoA and oleoyl-CoA as acyl donors. LYCAT acts as a remodeling enzyme for cardiolipin, a major membrane polyglycerophospholipid. It converts lysophosphatidic acid (LPA) into phosphatidic acid (PA) with a relatively low activity. LYCAT is required for establishment of the hematopoietic and endothelial lineages.