Abstract
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.
MeSH Terms
Amino Acid Sequence
Base Sequence
Blotting, Northern
Cell Division
Cloning, Molecular
Escherichia coli/genetics
Gene Expression Regulation, Bacterial
Genes, Bacterial/genetics
Molecular Sequence Data
Morphogenesis
Mutagenesis
Myxococcus xanthus/drug effects,genetics,growth & development,radiation effects
Nalidixic Acid/pharmacology
Rec A Recombinases/biosynthesis,genetics
Recombination, Genetic
Sequence Analysis, DNA
Sequence Homology, Amino Acid
Species Specificity
Ultraviolet Rays/adverse effects
Chemicals
Nalidixic Acid
Rec A Recombinases
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Norioka N
Department of Biochemistry, Robert Wood Johnson Medical School, Piscataway, New Jersey 08854, USA.
Hsu M Y
Inouye S
Inouye M
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