Neutral amino acid transporter B(0) (SLC1A5)

Sodium-dependent amino acids transporter which has a wide substrate specificity, with a taste for zwitterionic amino acids. It accepts as substrates all neutral amino acids, such as glutamine, asparagine, and branched-chain and aromatic amino acids, and excludes methylated, anionic, and cationic amino acids (PubMed:8702519, PubMed:29872227).

Through binding of the fusogenic protein syncytin-1/ERVW-1 may mediate trophoblasts syncytialization, the spontaneous mix of their plasma membranes, an essential process in placental development (PubMed:10708449, PubMed:23492904). .