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Journal of Bacteriology, October 2007, p. 7520-7524, Vol. 189, No. 20
0021-9193/07/$08.00+0     doi:10.1128/JB.00738-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Transducing Particles of Staphylococcus aureus Pathogenicity Island SaPI1 Are Comprised of Helper Phage-Encoded Proteins{triangledown} ,{dagger}

Sandra M. Tallent,1,{ddagger} Timothy B. Langston,2 Richard G. Moran,2 and Gail E. Christie1*

Departments of Microbiology and Immunology,1 Pharmacology and Toxicology, Virginia Commonwealth University School of Medicine, Richmond, Virginia2

Received 10 May 2007/ Accepted 3 August 2007

The relationship between the composition of SaPI1 transducing particles and those of helper phage 80{alpha} was investigated by direct comparison of virion proteins. Twelve virion proteins were identified by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and mass spectrometry; all were present in both 80{alpha} and SaPI1 virions, and all were encoded by 80{alpha}. No SaPI1-encoded proteins were detected. This confirms the prediction that SaPI1 is encapsidated in a virion assembled from helper phage-encoded proteins.

* Corresponding author. Mailing address: Department of Microbiology and Immunology, VCU, P.O. Box 980678, Richmond, VA 23298-0678. Phone: (804) 828-9093. Fax: (804) 828-9946. E-mail: christie{at}vcu.edu

{triangledown} Published ahead of print on 10 August 2007.

{dagger} Supplemental material for this article may be found at http://jb.asm.org/.

{ddagger} Present address: Commonwealth of Virginia, Division of Consolidated Laboratory Services, 600 North 5th Street, Richmond, VA 23219.

Journal of Bacteriology, October 2007, p. 7520-7524, Vol. 189, No. 20
0021-9193/07/$08.00+0     doi:10.1128/JB.00738-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



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