Function
SLC27A4, also known as Fatty Acid Transport Protein 4 (FATP4), is a crucial protein involved in the transport of long-chain fatty acids (LCFAs) across the plasma membrane. It possesses acyl-CoA ligase activity for both long-chain and very-long-chain fatty acids (VLCFAs). FATP4 is considered the primary fatty acid transporter in small intestinal enterocytes, playing a vital role in the formation of the epidermal barrier. It is essential for fat absorption during early embryogenesis and likely participates in fatty acid transport across the blood barrier. Additionally, FATP4 indirectly inhibits RPE65 through substrate competition and the production of VLCFA derivatives like lignoceroyl-CoA, preventing light-induced degeneration of rods and cones in the eye.