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Infect Immun, February 1998, p. 856-861, Vol. 66, No. 2
0019-9567/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Cell-Specific Proteins Synthesized by Salmonella typhimurium

Lisa Burns-Keliher,* Cheryl A. Nickerson, Brian J. Morrow, and Roy Curtiss III

Department of Biology, Washington University, St. Louis, Missouri 63130

Received 18 July 1997/Returned for modification 26 August 1997/Accepted 21 November 1997

Studies of the proteins synthesized by Salmonella typhimurium during growth within tissue culture cells have previously focused on a single cell type. In the present study we examine the different protein patterns exhibited by S. typhimurium during growth within three different cell types relevant to those it would encounter throughout the course of a natural infection, including intestinal epithelial cells (Intestine-407), macrophages (J774.A, rat bone marrow-derived macrophages, and mouse bone marrow-derived macrophages), and liver cells (NMuLi). Side-by-side comparisons reveal that S. typhimurium responds to these different cellular environments with specific patterns of protein synthesis unique to each cell type. The numbers of proteins detected in each cell line are as follows: 142 proteins in Intestine-407, of which 58 appear to be unique to growth within this cell line; 413 proteins in J774.A, of which 157 appear to be unique; 260 proteins in rat bone marrow-derived macrophages, of which 40 appear to be unique; 336 proteins in mouse bone marrow-derived macrophages, of which 113 appear to be unique; and 183 proteins in NMuLi, of which 91 appear to be unique.

* Corresponding author. Mailing address: Department of Biology, Campus Box 1137, Washington University, One Brookings Dr., St. Louis, MO 63130-4899. Phone: (314) 935-7186. Fax: (314) 935-7246. E-mail: burns{at}amonra.wustl.edu.




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