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Infection and Immunity, June 2001, p. 4109-4115, Vol. 69, No. 6
0019-9567/01/$04.00+0   DOI: 10.1128/IAI.69.6.4109-4115.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Pasteurella multocida Gene Expression in Response to Iron Limitation

Michael L. Paustian, Barbara J. May, and Vivek Kapur*

Department of Veterinary Pathobiology and Biomedical Genomics Center, University of Minnesota, St. Paul, Minnesota 55108

Received 30 October 2000/Returned for modification 29 January 2001/Accepted 26 February 2001

Pasteurella multocida is the causative agent of a wide range of diseases in avian and mammalian hosts. Gene expression in response to low iron conditions was analyzed in P. multocida using whole-genome microarrays. The analysis shows that the expression of genes involved in energy metabolism and electron transport generally decreased 2.1- to 6-fold while that of genes used for iron binding and transport increased 2.1- to 7.7-fold in P. multocida during the first 2 h of growth under iron-limiting conditions compared with controls. Notably, 27% of the genes with significantly altered expression had no known function, illustrating the limitations of using publicly available databases to identify genes involved in microbial metabolism and pathogenesis. Taken together, the results of our investigations demonstrate the utility of whole-genome microarray analyses for the identification of genes with altered expression profiles during varying growth conditions and provide a framework for the detailed analysis of the molecular mechanisms of iron acquisition and metabolism in P. multocida and other gram-negative bacteria.

* Corresponding author. Mailing address: 1971 Commonwealth Ave., St. Paul, MN 55108. Phone: (612) 625-7712. Fax: (612) 625-5203. E-mail: vkapur{at}umn.edu.

Infection and Immunity, June 2001, p. 4109-4115, Vol. 69, No. 6
0019-9567/01/$04.00+0   DOI: 10.1128/IAI.69.6.4109-4115.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


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