Vibrio parahaemolyticus Na(+)/galactose cotransporter (vSGLT) and related proteins; solute binding domain
vSGLT transports D-galactose, D-glucose, and alpha-D-fucose, with a sugar specificity in the order of D-galactose >D-fucose >D-glucose. It transports one Na+ ion for each sugar molecule, and appears to function as a monomer. vSGLT has 13 transmembrane helices (TMs): TM-1, an inverted topology repeat: TMs1-5 and TMs6-10, and TMs 11-12 (TMs numbered to conform to the solute carrier 6 family Aquifex aeolicus LeuT). This subfamily belongs to the solute carrier 5 (SLC5) transporter family.
Comment:based on the structures of Vibrio parahaemolyticus vSGLT (SLC5), Aquifex aeolicus LeuT (SLC6), and the NCS1, Microbacterium liquefaciens Mhp1, bound with Na+, functional studies of Escherichia coli PutP (SLC5) and mammalian NIS (SLC5), and mutational analysis of vSGLT
Comment:one of two Na+ binding sites in Aquifex aeolicus LeuT, where it is referred to as the Na binding site 2
Jiyao W et al.(2023). "The conserved domain database in 2023.",