Title : Sodium-independent low-affinity D-glucose transport by human sodium/D-glucose cotransporter 1: critical role of tryptophan 561.

Pub. Date : 2007 Mar 13

PMID : 17288452






3 Functional Relationships(s)
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Compound Name
Protein Name
Organism
1 In the absence of sodium, various sugars significantly decreased the intrinsic Trp fluorescence of hSGLT1 in proteoliposomes exhibiting the following sequence of affinities: alpha-MDG > d-glucose approximately d-galactose > 6-deoxy-d-glucose > 2-deoxy-d-glucose > d-allose. Tryptophan solute carrier family 5 member 1 Homo sapiens
2 This Trp residue is conserved in all known SGLT1 forms (except Vibrio parahaemolyticus SGLT) and all SGLT isoforms in humans (except hSGLT3). Tryptophan solute carrier family 5 member 1 Homo sapiens
3 If all these data are taken into consideration, it seems that Trp-561 in hSGLT1 forms part of a low-affinity sodium-independent binding and/or translocation site for d-glucose. Tryptophan solute carrier family 5 member 1 Homo sapiens