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J. Bacteriol., 07 1997, 4285-4291, Vol 179, No. 13
B Stevenson, S Casjens, R van Vugt, SF Porcella, K Tilly, JL Bono and P Rosa
We have mapped the genes encoding the antigenic lipoproteins OspE and OspF
to an approximately 18-kb circular plasmid in Borrelia burgdorferi N40.
Sequencing and restriction mapping have revealed that this plasmid, cp18,
is homologous to an 18-kb region of the cp32 circular plasmids found in the
Lyme disease spirochetes. Our data show that cp18 may have arisen from an
ancestral cp32 plasmid by deletion of a 14-kb region of DNA, indicating
that a significant portion of the cp32 plasmid is not essential in cis for
plasmid maintenance. These findings suggest that a relatively small
recombinant plasmid capable of being stably maintained in B. burgdorferi
could be constructed from a cp32 plasmid.
Copyright © 1997, American Society for Microbiology
Characterization of cp18, a naturally truncated member of the cp32 family of Borrelia burgdorferi plasmids
Laboratory of Microbial Structure and Function, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, Hamilton, Montana 59840, USA. brian_stevenson@nih.gov
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