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Clinical and Diagnostic Laboratory Immunology, July 1999, p. 617-620, Vol. 6, No. 4
1071-412X/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Conservation of Expression and N-Terminal Sequences of the Pasteurella haemolytica 31-Kilodalton and Pasteurella trehalosi 29-Kilodalton Periplasmic Iron-Regulated Proteins

Louisa B. Tabatabai* and Glynn H. Frank

National Animal Disease Center, Agricultural Research Service, U.S. Department of Agriculture, Ames, Iowa 50010

Received 5 November 1998/Returned for modification 19 January 1999/Accepted 9 March 1999

This study examined the conservation of expression of a 31-kDa iron-regulated protein by serotypes of Pasteurella haemolytica and Pasteurella trehalosi associated with pasteurellosis of cattle and sheep. A polyclonal antibody prepared against the purified 31-kDa periplasmic iron-regulated protein from P. haemolytica serotype A1 showed that all P. haemolytica serotypes expressed similar 31-kDa proteins with identical N-terminal sequences, whereas P. trehalosi serotypes expressed immunologically different 29-kDa proteins with a different N-terminal sequence. Antibody to the 31-kDa iron-regulated protein was a useful tool to distinguish similarities and differences of the iron-regulated proteins of P. haemolytica and P. trehalosi.

* Corresponding author. Mailing address: National Animal Disease Center, ARS, USDA, 2300 Dayton Rd., P.O. Box 70, Ames, IA 50010. Phone: (515) 294-6284. Fax: (515) 294-0453. E-mail: lbt{at}iastate.edu.

Clinical and Diagnostic Laboratory Immunology, July 1999, p. 617-620, Vol. 6, No. 4
1071-412X/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.




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