At the inner mitochondrial membrane (IM), calcium-independent phospholipase A2 gamma (PLA2G6) hydrolyzes, removing one of the acyl chains, cardiolipin (CL) to form monolysocardiolipin (MLCL). This reaction is inferred from rats. PLA2G6 has also been characterized in humans (Larsson et al. 1998, Ma et al. 1999, Larsson Forsell et al. 1999).
At the endoplasmic reticulum (ER) membrane, phosphatidylcholine (PC) is hydrolyzed and has one of its acyl chains cleaved off by a phospholipase A2 to form 1-acyl lysophosphatidylcholine (LPC). The phospholipases are either cytosolic phospholipase A2 alpha/beta/delta/zeta (PLA2G4A/B/D/F) (Ghomashchi et al. 2010, Clarke et al. 1991, Sharp et al. 1994, Song et al. 1999, Chiba et al. 2004), 85 kDa calcium-independent phospholipase A2 (PLA2G6) (Larsson et al. 1998, Ma et al. 1999, Larsson Forsell et al. 1999), group XVI phospholipase A2 (PLA2G16) (Duncan et al. 2008), or Phospholipase B-like 1 (PLBD1) (Xu et al. 2009). PLBD1 acts as a phospholipase A2 but in addition has the propensity to hydrolyze the lysophospholipid formed in its initial reaction.
At the endoplasmic reticulum (ER) membrane, phosphatidylethanolamine (PE) is hydrolyzed, and has one of its acyl chains cleaved off, by phospholipase A2 to form 1-acyl lysophosphatidylethanolamine (LPE). The phospholipases are either cytosolic phospholipase A2 alpha/beta/delta/epsilon/zeta (PLA2G(4A/B/D/E/F) (Ghosh et al. 2006, Yamashita et al. 2009, Yamashita et al. 1999, Ghomashchi et al. 2010), 85 kDa calcium-independent phospholipase A2 (PLA2G6) (Larsson et al. 1998, Ma et al. 1999, Larsson Forsell et al. 1999), group XVI phospholipase A2 (PLA2G16) (Duncan et al. 2008), or Phospholipase B-like 1 (PLBD1) (Xu et al. 2009). PLBD1 acts as a phospholipase A2 but in addition has the propensity to hydrolyze the lysophospholipid formed in its initial reaction.