Journal of Bacteriology, November 2003, p. 6723-6727, Vol. 185, No. 22
0021-9193/03/$08.00+0 DOI: 10.1128/JB.185.22.6723-6727.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.
aadA Confers Streptomycin Resistance in Borrelia burgdorferi
Kristi L. Frank,1,
Sharyl F. Bundle,1,
Michele E. Kresge,1,
Christian H. Eggers,2 and D. Scott Samuels1*
Division of Biological Sciences, The University of Montana, Missoula, Montana 59812,1
Center for Microbial Pathogenesis, University of Connecticut Health Center, Farmington, Connecticut 060302
Received 6 June 2003/
Accepted 26 August 2003
To enhance genetic manipulation of the Lyme disease spirochete Borrelia burgdorferi, we assayed the aadA gene for the ability to confer resistance to the antibiotics spectinomycin and streptomycin. Using the previously described pBSV2 as a backbone, a shuttle vector, termed pKFSS1, which carries the aadA open reading frame fused to the B. burgdorferi flgB promoter was constructed. The hybrid flgB promoter-aadA cassette confers resistance to spectinomycin and streptomycin in both B. burgdorferi and Escherichia coli. pKFSS1 has a replication origin derived from the 9-kb circular plasmid and can be comaintained in B. burgdorferi with extant shuttle vector pCE320, which has a replication origin derived from a 32-kb circular plasmid, or pBSV2, despite the fact that pKFSS1 and pBSV2 have the same replication origin. Our results demonstrate the availability of a new selectable marker and shuttle vector for genetically dissecting B. burgdorferi at the molecular level.
* Corresponding author. Mailing address: Division of Biological Sciences, 32 Campus Dr., #4824, The University of Montana, Missoula, MT 59812-4824. Phone: (406) 243-6145. Fax: (406) 243-4184. E-mail: samuels{at}mso.umt.edu.
Present address: Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN 55905.
Present address: Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030.
Deceased.
Journal of Bacteriology, November 2003, p. 6723-6727, Vol. 185, No. 22
0021-9193/03/$08.00+0 DOI: 10.1128/JB.185.22.6723-6727.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.
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Copyright © 2003 by the American Society for Microbiology. All rights reserved.