FAF2

Plays an important role in endoplasmic reticulum-associated degradation (ERAD) that mediates ubiquitin-dependent degradation of misfolded endoplasmic reticulum proteins. By controlling the steady-state expression of the IGF1R receptor, indirectly regulates the insulin-like growth factor receptor signaling pathway. Recruits ATPase VCP to lipid droplets and also binds to phospholipase PNPLA2/ATGL, inhibiting PNPLA2 activity by promoting its dissociation from its ABHD5/CGI-58 activator. This inhibits PNPLA2-mediated triacylglycerol hydrolysis and leads to inhibition of lipid droplet degradation. Involved in stress granule disassembly: associates with ubiquitinated G3BP1 in response to heat shock, thereby promoting interaction between ubiquitinated G3BP1 and VCP, followed by G3BP1 extraction from stress granules and stress granule disassembly..

Function from UniProtKB (Q96CS3), read 2026-09-23. CC BY 4.0.