title: Two recA genes in Myxococcus xanthus.
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.
authors.affiliation: Department of Biochemistry, Robert Wood Johnson Medical School, Piscataway, New Jersey 08854, USA.
authors.forename: N
authors.initials: N
authors.lastname: Norioka
authors.forename: M Y
authors.initials: MY
authors.lastname: Hsu
authors.forename: S
authors.initials: S
authors.lastname: Inouye
authors.forename: M
authors.initials: M
authors.lastname: Inouye
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D015152:Blotting, Northern; D002455:Cell Division; D003001:Cloning, Molecular; D004926:Escherichia coli / Q000235:genetics; D015964:Gene Expression Regulation, Bacterial; D005798:Genes, Bacterial / Q000235:genetics*; D008969:Molecular Sequence Data; D009024:Morphogenesis; D016296:Mutagenesis; D016941:Myxococcus xanthus / Q000187:drug effects / Q000235:genetics* / Q000254:growth & development / Q000528:radiation effects; D009268:Nalidixic Acid / Q000494:pharmacology; D011938:Rec A Recombinases / Q000096:biosynthesis / Q000235:genetics*; D011995:Recombination, Genetic; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D013045:Species Specificity; D014466:Ultraviolet Rays / Q000009:adverse effects
chemical_list: D009268:Nalidixic Acid; D011938:Rec A Recombinases