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Journal of Bacteriology, February 2006, p. 1169-1174, Vol. 188, No. 3
0021-9193/06/$08.00+0     doi:10.1128/JB.188.3.1169-1174.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

A Bacteroides Conjugative Transposon, CTnERL, Can Transfer a Portion of Itself by Conjugation without Excising from the Chromosome

Gabrielle Whittle, Nathan Hamburger, Nadja B. Shoemaker,* and Abigail A. Salyers

Department of Microbiology, University of Illinois, Urbana, Illinois 61801

Received 2 June 2005/ Accepted 11 November 2005

CTnERL, a Bacteroides conjugative transposon, transferred DNA by an Hfr-type mechanism during conjugation when it was excision deficient due to an insertion in the integrase gene. Rescue of the conjugative transposon sequences required the recipient to be RecA proficient and to contain an integrated CTnERL. The transfer efficiency was only 10- to 30-fold lower than the normal element transfer efficiency, and the direction of transfer from the oriT gene showed that the integrase end was transferred first and that the transfer genes were transferred last.

* Corresponding author. Mailing address: Department of Microbiology, 601 S. Goodwin Ave., University of Illinois, Urbana, IL 61801. Phone: (217) 333-2061. Fax: (217) 244-8485. E-mail: nadjasho{at}life.uiuc.edu.

Journal of Bacteriology, February 2006, p. 1169-1174, Vol. 188, No. 3
0021-9193/06/$08.00+0     doi:10.1128/JB.188.3.1169-1174.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.



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