Oxysterol-binding protein-related protein 8 (OSBPL8)

Lipid transporter involved in lipid countertransport between the endoplasmic reticulum and the plasma membrane: specifically exchanges phosphatidylserine with phosphatidylinositol 4-phosphate (PI4P), delivering phosphatidylserine into the plasma membrane in exchange for PI4P, which is degraded by the SAC1/SACM1L phosphatase in the endoplasmic reticulum. Binds phosphatidylserine and PI4P in a mutually exclusive manner (PubMed:26206935).

Binds oxysterol, 25- hydroxycholesterol and cholesterol (PubMed:17428193, PubMed:17991739, PubMed:21698267). .