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Journal of Bacteriology, August 2001, p. 4664-4667, Vol. 183, No. 15
0021-9193/01/$04.00+0   DOI: 10.1128/JB.183.15.4664-4667.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

ZitB (YbgR), a Member of the Cation Diffusion Facilitator Family, Is an Additional Zinc Transporter in Escherichia coli

Gregor Grass,1 Bin Fan,2 Barry P. Rosen,2 Sylvia Franke,3 Dietrich H. Nies,3 and Christopher Rensing1,*

Department of Soil, Water, and Environmental Science, University of Arizona, Tucson, Arizona 857211; Department of Biochemistry and Molecular Biology, Wayne State University, Detroit, Michigan 482012; and Institut für Mikrobiologie, Martin-Luther-Universität Halle-Wittenberg, 06120 Halle, Germany3

Received 7 March 2001/Accepted 14 May 2001

The Escherichia coli zitB gene encodes a Zn(II) transporter belonging to the cation diffusion facilitator family. ZitB is specifically induced by zinc. ZitB expression on a plasmid rendered zntA-disrupted E. coli cells more resistant to zinc, and the cells exhibited reduced accumulation of 65Zn, suggesting ZitB-mediated efflux of zinc.

* Corresponding author. Mailing address: Department of Soil, Water, and Environmental Science, University of Arizona, Shantz Bldg. #38 Rm. 429, Tucson, AZ 85721. Phone: (520) 626-8482. Fax: (520) 621-1647. E-mail: rensingc{at}ag.arizona.edu.

Journal of Bacteriology, August 2001, p. 4664-4667, Vol. 183, No. 15
0021-9193/01/$04.00+0   DOI: 10.1128/JB.183.15.4664-4667.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


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