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Journal of Bacteriology, May 2008, p. 3381-3385, Vol. 190, No. 9
0021-9193/08/$08.00+0     doi:10.1128/JB.01840-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

Biogenesis of the Fraction 1 Capsule and Analysis of the Ultrastructure of Yersinia pestis{triangledown}

Lisa M. Runco, Selina Myrczek,{dagger} James B. Bliska, and David G. Thanassi*

Center for Infectious Diseases, Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York 11794-5120

Received 21 November 2007/ Accepted 19 February 2008

Analysis of a Yersinia pestis {Delta}caf1A mutant demonstrated that the Caf1A usher is required for the assembly and secretion of the fraction 1 capsule. The capsule assembled into thin fibrils and denser aggregates on the bacterial surface. Pilus-like fibers were also detected on the surface of Y. pestis. The capsule occasionally coated these fibers, suggesting how the capsule may cloak surface features to prevent host recognition.


* Corresponding author. Mailing address: 242 Center for Infectious Diseases, Stony Brook University, Stony Brook, NY 11794-5120. Phone: (631) 632-4549. Fax: (631) 632-4294. E-mail: David.Thanassi{at}stonybrook.edu

{triangledown} Published ahead of print on 29 February 2008.

{dagger} Present address: Institute of Clinical Microbiology, Immunology and Hygiene, University Hospital Erlangen, Wasserturmstr. 3-5, D-91054 Erlangen, Germany.


Journal of Bacteriology, May 2008, p. 3381-3385, Vol. 190, No. 9
0021-9193/08/$08.00+0     doi:10.1128/JB.01840-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.




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