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Biochim Biophys Acta. 2000 Sep 7;1493(1-2):215-8.

Cloning, characterization and chromosomal assignment of NBC4, a new member of the sodium bicarbonate cotransporter family.

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  • 1Division of Nephrology, UCLA School of Medicine, 10833 Le Conte Avenue, Room 7-155 Factor Building, 90095-1689, Los Angeles, CA, USA.

Abstract

We report the cloning, characterization and chromosomal assignment of a new member of the sodium bicarbonate cotransporter (NBC) family, NBC4, from human heart. NBC4 maps to chromosome 2p13 and is a new candidate gene for Alstrom syndrome. NBC4 encodes a 1074-residue polypeptide with 12 putative membrane-spanning domains. Unlike other members of the NBC family, NBC4 has a unique glycine-rich region (amino acids 438-485). In addition, NBC4 lacks the lysine-rich C-terminus of NBC1 with which it is most homologous. The first of two putative stilbene binding motifs (K(M/L)(X)K) is lacking in NBC4 (amino acids 655-658). The approximately 6 kb NBC4 transcript is moderately expressed in heart, with the highest expression in liver, testes and spleen.

PMID:
10978526
[PubMed - indexed for MEDLINE]
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