PGAP6

Involved in the lipid remodeling steps of GPI-anchor maturation. Lipid remodeling steps consist in the generation of 2 saturated fatty chains at the sn-2 position of GPI-anchor proteins (GPI-AP). Has phospholipase A2 activity that removes an acyl-chain at the sn-2 position of GPI-anchors during the remodeling of GPI. Required for the shedding of the GPI-AP CRIPTO, but not CFC1, at the cell surface. Shedding of CRIPTO modulates Nodal signaling by allowing soluble CRIPTO to act as a Nodal coreceptor on other cells. Also indirectly involved in the translocation of RAC1 from the cytosol to the plasma membrane by maintaining the steady state amount of CAV1-enriched plasma membrane subdomains, stabilizing RAC1 at the plasma membrane. In contrast to myomaker (TMEM8C), has no fusogenic activity..

Function from UniProtKB (Q9HCN3), read 2026-09-23. CC BY 4.0.