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Appl. Environ. Microbiol., 03 1995, 1104-1109, Vol 61, No. 3
S Yamamoto and S Harayama
Degenerate PCR primers, UP-1 and UP-2r, for the amplification of DNA gyrase
subunit B genes (gyrB) were designed by using consensus amino acid
sequences of gyrases from Escherichia coli, Pseudomonas putida, and
Bacillus subtilis. In addition to the degenerate sequences, these primers
have sequences at the 5' end which allow direct sequencing of amplified PCR
products. With these primers, DNA segments of the predicted size were
amplified from a variety of gram-negative and gram- positive genera. The
nucleotide sequences of the amplified gyrB DNA from three P. putida strains
were determined directly from the amplified fragments. The base
substitution frequency of gyrB between the strains of P. putida was much
higher than that of the 16S rRNA gene. With a specific set of PCR primers,
it was possible to amplify gyrB fragments selectively from P. putida or its
subgroups. The direct sequencing method of gyrB developed in this study
provides a rapid and convenient system for bacterial identification,
taxonomic analysis, and monitoring of bacteria in the natural environment.
Copyright © 1995, American Society for Microbiology
PCR amplification and direct sequencing of gyrB genes with universal primers and their application to the detection and taxonomic analysis of Pseudomonas putida strains [published erratum appears in Appl Environ Microbiol 1995 Oct;61(10):3768]
Marine Biotechnology Institute, Kamaishi Laboratories, Iwate, Japan.
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