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Infection and Immunity, June 2007, p. 3188-3191, Vol. 75, No. 6
0019-9567/07/$08.00+0 doi:10.1128/IAI.01745-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Department of Microbiology, University of Minnesota Medical School, Minneapolis, Minnesota 55455
Received 1 November 2006/ Returned for modification 24 January 2007/ Accepted 13 March 2007
Streptococcus pyogenes is a major cause of pharyngitis in humans and encodes several fibronectin-binding proteins. M protein and protein F1 (PrtF1/SfbI) are differentially regulated by CO2 and O2, respectively, and both mediate the invasion of epithelial cells. This study examined whether PrtF1/SfbI shares other properties with M protein. Expression of the PrtF1/SfbI protein by an M-negative mutant conferred resistance to phagocytosis and partial inhibition of C3 deposition on the S. pyogenes surface.
Published ahead of print on 19 March 2007.
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