Neutral amino acid transporter B

Definition:

Sodium-dependent amino acids transporter that has a broad substrate specificity, with a preference for zwitterionic amino acids. It accepts as substrates all neutral amino acids, including glutamine, asparagine, and branched-chain and aromatic amino acids, and excludes methylated, anionic, and cationic amino acids. Through binding of the fusogenic protein syncytin-1/ERVW-1 may mediate trophoblasts syncytialization, the spontaneous fusion of their plasma membranes, an essential process in placental development.; (Microbial infection) Acts as a cell surface receptor for Feline endogenous virus RD114.; (Microbial infection) Acts as a cell surface receptor for Baboon M7 endogenous virus.; (Microbial infection) Acts as a cell surface receptor for type D simian retroviruses.

References:

[1]. Jun Sugimoto, et al. A novel human endogenous retroviral protein inhibits cell-cell fusion. Sci Rep. 2013;3:1462. [Content Brief]

[2]. Alisa A Garaeva, et al. Cryo-EM structure of the human neutral amino acid transporter ASCT2. Nat Struct Mol Biol. 2018 Jun;25(6):515-521. [Content Brief]

[3]. J E Rasko, et al. The RD114/simian type D retrovirus receptor is a neutral amino acid transporter. Proc Natl Acad Sci U S A. 1999 Mar 2;96(5):2129-34. [Content Brief]

[4]. R Kekuda, et al. Cloning of the sodium-dependent, broad-scope, neutral amino acid transporter Bo from a human placental choriocarcinoma cell line. J Biol Chem. 1996 Aug 2;271(31):18657-61. [Content Brief]

[5]. C S Tailor, et al. A sodium-dependent neutral-amino-acid transporter mediates infections of feline and baboon endogenous retroviruses and simian type D retroviruses. J Virol. 1999 May;73(5):4470-4. [Content Brief]

[6]. J L Blond, et al. An envelope glycoprotein of the human endogenous retrovirus HERV-W is expressed in the human placenta and fuses cells expressing the type D mammalian retrovirus receptor. J Virol. 2000 Apr;74(7):3321-9. [Content Brief]

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