The function of ENSG00000144645 (OSBPL10, oxysterol binding protein like 10) is as follows. Lipid transporter involved in lipid countertransport between the endoplasmic reticulum and the plasma membrane. Its ability to bind phosphatidylserine, suggests that it specifically exchanges phosphatidylserine with phosphatidylinositol 4-phosphate (PI4P), delivering phosphatidylserine to the plasma membrane in exchange for PI4P (Probable) (PubMed:23934110). Plays a role in negative regulation of lipid biosynthesis (PubMed:19554302). Interacts with OSBPL9 to function as lipid transfer proteins (PubMed:36853333). Together they form a heterodimer that localizes at the ER-trans-Golgi membrane contact sites, and exchanges phosphatidylserine (1,2-diacyl-sn-glycero- 3-phospho-L-serine, PS) for phosphatidylinositol-4-phosphate (1,2- diacyl-sn-glycero-3-phospho-(1D-myo-inositol 4-phosphate), PI(4)P) between the two organelles, a step that is critical for sphingomyelin synthesis in the Golgi complex (PubMed:36853333). Negatively regulates APOB secretion from hepatocytes (PubMed:19554302, PubMed:22906437). Binds cholesterol and acidic phospholipids (PubMed:22906437). Also binds 25-hydroxycholesterol (PubMed:17428193). Binds phosphatidylserine (PubMed:23934110). {ECO:0000269|PubMed:17428193, ECO:0000269|PubMed:19554302, ECO:0000269|PubMed:22906437, ECO:0000269|PubMed:23934110, ECO:0000269|PubMed:36853333, ECO:0000305}.