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Infection and Immunity, January 2001, p. 534-537, Vol. 69, No. 1
0019-9567/01/$04.00+0   DOI: 10.1128/IAI.69.1.534-537.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Group A Streptococcal rofA Gene Is Involved in the Control of Several Virulence Genes and Eukaryotic Cell Attachment and Internalization

Susanne Beckert, Bernd Kreikemeyer, and Andreas Podbielski*

Department of Medical Microbiology, University Hospital Ulm, D-89081 Ulm, Germany

Received 24 April 2000/Returned for modification 11 August 2000/Accepted 2 October 2000

The serotype M6 group A streptococcal RofA regulator was previously shown to exert a direct positive control of protein F1 expression and, concomitantly, fibronectin binding. Using a serotype M6 rofA mutant, we demonstrate here that this regulator has a potentially indirect negative influence on the expression of the mga, emm6, pel-sagA, and speA virulence genes. Additionally, the rofA mutant exhibited reduced eukaryotic cell internalization rates in combination with decreased host cell viability.


* Corresponding author. Mailing address: Department of Medical Microbiology and Hygiene, University Hospital Rostock, Schillingallee 70, D-18055 Rostock, Germany. Phone: 49-731-502-4615. Fax: 49-731-502-4619. E-mail: andreas.podbielski{at}med.uni-rostock.de.


Infection and Immunity, January 2001, p. 534-537, Vol. 69, No. 1
0019-9567/01/$04.00+0   DOI: 10.1128/IAI.69.1.534-537.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.



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