endoplasmic reticulum membrane
The H-RAS-like suppressor (HRASLS) subfamily consists of five enzymes (1–5) in humans that share sequence homology with lecithin:retinol acyltransferase (LRAT). All HRASLS members possess in vitro phospholipid metabolizing abilities including phospholipase A1/2 (PLA1/2) activities and O-acyltransferase activities for the remodeling of glycerophospholipid acyl chains (Golczak et al. 2012), as well as N-acyltransferase activities for the production of N-acylphosphatidylethanolamines (Mardian et al. 2015). Acyl chain remodelling can play a key role in regulating triglyceride accumulation and energy expenditure in adipocytes, making this process a potential target for treatment of metabolic disorders causing obesity. The example here describes the N-acyltransferase activity of HRASLSs for the production of N-acylphosphatidylethanolamines (NAPEs) (Uyama et al. 2012).