System B(0) neutral amino acid transporter AT1, 2 and 3, and related proteins; solute-binding domain
This subgroup includes the solute-binding domain of transmembrane transporters, which transport, i) neutral amino acids: NTT4 (also called XT1), SBAT1 (also called B0AT2, v7-3, NTT7-3), and B0AT1 (also called HND); the human genes encoding these are SLC6A17, SLC6A15, and SLC6A19 respectively, ii) glycine: B0AT3 (also called Xtrp2, XT2), iii) imino acids, such as proline, pipecolate, MeAIB, and sarcosine: SIT1 (also called XTRP3, XT3, IMINO). The human genes encoding B0AT3 and SIT1 are SLC6A18 and SLC6A20 respectively. Transporters in this subgroup may play a role in disorders including major depression, Hartnup disorder, increased susceptibility to myocardial infarction, and iminoglycinuria. This subgroup belongs to the solute carrier 6 (SLC6) transporter family.
Comment:based on Aquifex aeolicus LeuT (SLC6) with structure
Comment:One of two Na+ binding sites in Aquifex aeolicus LeuT. It binds the Na+ ion designated Na2, and appears conserved in Vibrio parahaemolyticus vSGLT and other SLC5 proteins
Jiyao W et al.(2023). "The conserved domain database in 2023.",