The function of Ensembl gene identifier ENSG00000091039 (OSBPL8, oxysterol binding protein like 8) is as follows. Lipid transporter involved in lipid countertransport between the endoplasmic reticulum and the plasma membrane: specifically exchanges phosphatidylserine with phosphatidylinositol 4-phosphate (PI4P), delivering phosphatidylserine to 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). {ECO:0000269|PubMed:17428193, ECO:0000269|PubMed:17991739, ECO:0000269|PubMed:21698267, ECO:0000269|PubMed:26206935}.