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Journal of Bacteriology, November 1998, p. 5928-5931, Vol. 180, No. 22
0021-9193/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Characterization of the Lysogenic Bacteriophage MAV1 from Mycoplasma arthritidis

LeRoy L. Voelker* and Kevin Dybvig

Department of Comparative Medicine, University of Alabama at Birmingham, Birmingham, Alabama 35294-0019

Received 17 April 1998/Accepted 16 September 1998

The lysogenic bacteriophage MAV1, which is associated with the arthritogenicity of Mycoplasma arthritidis, was characterized. Several strains of M. arthritidis were examined for their ability to support growth of MAV1. A PFU assay was developed, and the sensitivity of phage to various chemical treatments was assayed. The most notable result was the resistance of MAV1 to proteinase K. The MAV1 genome is a double-stranded, linear DNA molecule of about 16 kb. The site of MAV1 DNA integration in the host chromosome was investigated. The ends of MAV1 DNA were cloned from three independent lysogens shown to have MAV1 DNA inserted at different sites in the host. The nucleotide sequences of the ends of the MAV1 genome and of the MAV1 DNA-chromosomal DNA junctions from each of three lysogens were determined. Sequences flanking the integrated prophage and the ends of native MAV1 DNA were determined, allowing the identification of the phage DNA (attP) and bacterial DNA (attB) recombination sites. Analysis of the left MAV1 DNA-chromosomal DNA junction sites showed a single-base heterogeneity located within MAV1 DNA sequences immediately adjacent to the attB sequence. A model for MAV1 integration-excision is proposed.

* Corresponding author. Mailing address: Department of Comparative Medicine, University of Alabama at Birmingham, 422 Volker Hall, Birmingham, AL 35294-0019. Phone: (205) 934-9141. Fax: (205) 975-4418. E-mail: riker{at}uab.edu.

Journal of Bacteriology, November 1998, p. 5928-5931, Vol. 180, No. 22
0021-9193/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


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