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Journal of Bacteriology, March 2009, p. 1631-1640, Vol. 191, No. 5
0021-9193/09/$08.00+0     doi:10.1128/JB.01394-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.

A Campylobacter jejuni znuA Orthologue Is Essential for Growth in Low-Zinc Environments and Chick Colonization{triangledown}

Lindsay M. Davis,1 Tsutomu Kakuda,2 and Victor J. DiRita1,2*

Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan,1 Unit for Laboratory Medicine, University of Michigan, Ann Arbor, Michigan2

Received 3 October 2008/ Accepted 10 December 2008

Campylobacter jejuni infection is a leading cause of bacterial gastroenteritis in the United States and is acquired primarily through the ingestion of contaminated poultry products. Here, we describe the C. jejuni orthologue of ZnuA in other gram-negative bacteria. ZnuA (Cj0143c) is the periplasmic component of a putative zinc ABC transport system and is encoded on a zinc-dependent operon with Cj0142c and Cj0141c, which encode the other two likely components of the transport system of C. jejuni. Transcription of these genes is zinc dependent. A mutant lacking Cj0143c is growth deficient in zinc-limiting media, as well as in the chick gastrointestinal tract. The protein is glycosylated at asparagine 28, but this modification is dispensable for zinc-limited growth and chick colonization. Affinity-purified FLAG-tagged Cj0143c binds zinc in vitro. Based on our findings and on its homology to E. coli ZnuA, we conclude that Cj0143c encodes the C. jejuni orthologue of ZnuA.

* Corresponding author. Mailing address: Department of Microbiology and Immunology, University of Michigan Medical School, 5641 Medical Sciences II, Ann Arbor, MI 48109. Phone: (734) 936-3804. Fax: (734) 763-7163. E-mail: vdirita{at}umich.edu

{triangledown} Published ahead of print on 19 December 2008.

Journal of Bacteriology, March 2009, p. 1631-1640, Vol. 191, No. 5
0021-9193/09/$08.00+0     doi:10.1128/JB.01394-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Graham, A. I., Hunt, S., Stokes, S. L., Bramall, N., Bunch, J., Cox, A. G., McLeod, C. W., Poole, R. K. (2009). Severe Zinc Depletion of Escherichia coli: ROLES FOR HIGH AFFINITY ZINC BINDING BY ZinT, ZINC TRANSPORT AND ZINC-INDEPENDENT PROTEINS. J. Biol. Chem. 284: 18377-18389 [Abstract] [Full Text]  


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