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Journal of Bacteriology, May 2009, p. 3183-3188, Vol. 191, No. 9
0021-9193/09/$08.00+0     doi:10.1128/JB.00147-09
Copyright © 2009, American Society for Microbiology. All Rights Reserved.

Plasmid pAMS1-Encoded, Bacteriocin-Related "Siblicide" in Enterococcus faecalis{triangledown}

Christine M. Sedgley,1* Don B. Clewell,2,3 and Susan E. Flannagan1

Department of Cariology, Restorative Sciences and Endodontics,1 Department of Biologic and Materials Sciences, School of Dentistry,2 Department of Microbiology and Immunology, Medical School, The University of Michigan, Ann Arbor, Michigan3

Received 3 February 2009/ Accepted 24 February 2009

The Enterococcus faecalis class IIa bacteriocin MC4-1 encoded by the sex pheromone-responding, multiple-antibiotic resistance plasmid pAMS1 exhibits "siblicidal" (sibling-killing) activity under certain conditions. Stabs of plasmid-containing cells on solid medium containing lawns of bacteria of the same (plasmid-containing) strain give rise to zones of inhibition. If the plasmid-containing host also produces gelatinase, bacteriocin cannot be detected.

* Corresponding author. Mailing address: Department of Cariology, Restorative Sciences & Endodontics, School of Dentistry, The University of Michigan, 1011 N. University Ave., Ann Arbor, MI 48109-1078. Phone: (734) 615-3210. Fax: (734) 936-1597. E-mail: csedgley{at}umich.edu

{triangledown} Published ahead of print on 6 March 2009.

Journal of Bacteriology, May 2009, p. 3183-3188, Vol. 191, No. 9
0021-9193/09/$08.00+0     doi:10.1128/JB.00147-09
Copyright © 2009, American Society for Microbiology. All Rights Reserved.





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