CHR, a Novel Family of Prokaryotic Proton Motive Force-Driven Transporters Probably Containing Chromate/Sulfate Antiporters

Author:

Nies Dietrich H.1,Koch Sandra1,Wachi Shinichiro2,Peitzsch Nicola1,Saier Milton H.2

Affiliation:

1. Institut für Mikrobiologie, D-06099 Halle, Germany,1 and

2. Department of Biology, University of California at San Diego, La Jolla, California 92093-01162

Abstract

ABSTRACT We describe a small family of proteins, CHR, which contains members that function in chromate and/or sulfate transport. CHR proteins occur in bacteria and archaea. They consist of about 400 amino acyl residues, appear to have 10 transmembrane α-helical segments in an unusual 4+6 arrangement, and arose by an intragenic duplication event.

Publisher

American Society for Microbiology

Subject

Molecular Biology,Microbiology

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