Cloning of a human kidney cDNA with similarity to the sodium-glucose cotransporter

Am J Physiol. 1992 Sep;263(3 Pt 2):F459-65. doi: 10.1152/ajprenal.1992.263.3.F459.


We have used low-stringency screening with the human intestinal Na(+)-glucose cotransporter SGLT1 to isolate a 2,271-nucleotide cDNA (Hu14) from human kidney. This clone, which encodes a 672-residue protein, is 59% identical at the amino acid level to SGLT1 and has a similar number and arrangement of predicted membrane-spanning regions. It also shares significant sequence identity with other Na(+)-coupled transporters. Northern blot analysis suggests strong expression of Hu14 in kidney, but, unlike SGLT1, no significant expression in intestine. We have been unable to demonstrate definitive transport of any of a number of substrates (including amino acids, sugars, nucleosides, and vitamins) into Hu14 cRNA-injected Xenopus oocytes, although sequence conservation makes it likely that Hu14 represents another member of the Na+ cotransporter family, possibly a second Na(+)-glucose cotransporter.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Amino Acid Sequence
  • Base Sequence
  • Cloning, Molecular*
  • DNA / genetics*
  • Gene Library
  • Humans
  • Kidney / metabolism*
  • Molecular Sequence Data
  • Monosaccharide Transport Proteins / genetics*


  • Monosaccharide Transport Proteins
  • DNA

Associated data

  • GENBANK/M95549