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J. Bacteriol., 07 1995, 4179-4182, Vol 177, No. 14
N Norioka, MY Hsu, S Inouye and M Inouye
Two recA genes, recA1 and recA2, in Myxococcus xanthus were cloned by using
the recA gene of Escherichia coli, and their DNA sequences were determined.
On the basis of deduced amino acid sequences, RecA1 and RecA2 have 67.0%
identity to each other and 60.5 and 60.9% identities to E. coli RecA,
respectively. Expression of recA2 was detected in both vegetative and
developmental cells by Northern blot (RNA) analysis, and a threefold
induction was observed when cells were treated with nalidixic acid.
Repeated attempts to isolate a recA2 disruption mutant have failed, while a
recA1 disruption mutant was readily isolated. Both the recA1 and recA2
genes expressed in E. coli complement the UV sensitivity of an E. coli recA
strain.
Copyright © 1995, American Society for Microbiology
Two recA genes in Myxococcus xanthus
Department of Biochemistry, Robert Wood Johnson Medical School, Piscataway, New Jersey 08854, USA.
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