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Journal of Bacteriology, November 1998, p. 5799-5802, Vol. 180, No. 21
0021-9193/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

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

Dietrich H. Nies,1,* Sandra Koch,1 Shinichiro Wachi,2 Nicola Peitzsch,1 and Milton H. Saier Jr.2

Institut für Mikrobiologie, D-06099 Halle, Germany,1 and Department of Biology, University of California at San Diego, La Jolla, California 92093-01162

Received 6 July 1998/Accepted 2 September 1998

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 alpha -helical segments in an unusual 4+6 arrangement, and arose by an intragenic duplication event.

* Corresponding author. Mailing address: Institut für Mikrobiologie, Kurt-Mothes-Str. 3, D-06099, Halle, Germany. Phone: (49)-345-5526352. Fax: (49)-345-552-7010. E-mail: D.Nies{at}mikrobiologie.uni-halle.de.

Journal of Bacteriology, November 1998, p. 5799-5802, Vol. 180, No. 21
0021-9193/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


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