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Journal of Bacteriology, January 1999, p. 454-461, Vol. 181, No. 2
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Protein-DNA Complexes in Mycobacteriophage L5 Integrative Recombination

Carol E. A. Peña, J. Michelle Kahlenberg,dagger and Graham F. Hatfull*

Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15260

Received 6 July 1998/Accepted 6 November 1998

The temperate mycobacteriophage L5 integrates site specifically into the genomes of Mycobacterium smegmatis, Mycobacterium tuberculosis, and Mycobacterium bovis bacillus Calmette-Guérin. This integrative recombination event occurs between the phage L5 attP site and the mycobacterial attB site and requires the phage-encoded integrase and mycobacterial-encoded integration host factor mIHF. Here we show that attP, Int-L5, and mIHF assemble into a recombinationally active complex, the intasome, which is capable of attB capture and formation of products. The arm-type integrase binding sites within attP play specialized roles in the formation of specific protein-DNA architectures; the intasome is constructed by the formation of intramolecular integrase bridges between one pair of sites, P4-P5, and the attP core, while an additional pair of sites, P1-P2, is required for interaction with attB.

* Corresponding author. Mailing address: Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260. Phone: (412) 624-6975. Fax: (412) 624-4870. E-mail: GFH{at}vms.cis.pitt.edu.

dagger Present address: Case Western Reserve University School of Medicine, Cleveland, OH 44106.

Journal of Bacteriology, January 1999, p. 454-461, Vol. 181, No. 2
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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  • Peña, C. E. A., Kahlenberg, J. M., Hatfull, G. F. (2000). Assembly and activation of site-specific recombination complexes. Proc. Natl. Acad. Sci. USA 10.1073/pnas.140014297v1 [Abstract] [Full Text]  
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