title: Molecular analysis and identification of the radC gene from the phototrophic bacterium Rhodobacter capsulatus B10.
abstract: The radC gene, whose product plays a role in the prokaryotic repair of DNA damage after UV and X-ray irradiation, was cloned and sequenced from the phototrophic bacterium Rhodobacter capsulatus B10. The gene codes for a protein of 214 amino acids with a molecular mass of 23,792 Da. The deduced amino acid sequence showed significant homology with the RadC proteins of Escherichia coli, Bacillus subtilis and Haemophilus influenzae. Northern blot analysis indicated that under both chemotrophic and phototrophic growth conditions the radC gene was relatively highly expressed and was induced about five-fold after UV-irradiation. Primer extension analysis revealed that transcription was initiated from the same position before and after UV treatment. Mutants (radC negative) have a low survival rate and a slower growth rate than the wild type.
authors.affiliation: Institute of Biology II/Microbiology, University of Freiburg, Germany.
authors.forename: E
authors.initials: E
authors.lastname: Katsiou
authors.forename: C M
authors.initials: CM
authors.lastname: Nickel
authors.forename: A F
authors.initials: AF
authors.lastname: Garcia
authors.forename: M H
authors.initials: MH
authors.lastname: Tadros
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism; D001483:Base Sequence; D015152:Blotting, Northern; D004260:DNA Repair / Q000235:genetics*; D004269:DNA, Bacterial / Q000235:genetics; D004268:DNA-Binding Proteins; D029968:Escherichia coli Proteins; D017353:Gene Deletion; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D009154:Mutation; D016366:Open Reading Frames / Q000235:genetics; D016354:Rhodobacter capsulatus / Q000737:chemistry / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism / Q000528:radiation effects; D016415:Sequence Alignment; D013997:Time Factors; D014158:Transcription, Genetic / Q000235:genetics; D014466:Ultraviolet Rays / Q000009:adverse effects
chemical_list: D001426:Bacterial Proteins; D004269:DNA, Bacterial; D004268:DNA-Binding Proteins; D029968:Escherichia coli Proteins; C074495:yicR protein, E coli