@article{hendrischk_phra_2007, title = {The phrA gene of Rhodobacter sphaeroides encodes a photolyase and is regulated by singlet oxygen and peroxide in a sigma(E)-dependent manner}, author = {Anne-Kathrin Hendrischk and Stephan Braatsch and Jens Glaeser and Gabriele Klug}, journal = {Microbiology (Reading, England)}, month = {June}, note = {PMID: 17526841}, pages = {1842-51}, volume = {153}, year = {2007}, biburl = {http://www.bibsonomy.org/bibtex/2f1831a18a9ee9dba81778273d45463ab/mikromolbio}, abstract = {The genome of the facultatively photosynthetic bacterium Rhodobacter sphaeroides encodes three proteins of the photolyase/cryptochrome family. This paper shows that phrA (RSP2143) encodes a functional photolyase, which is an enzyme that repairs UV radiation-induced DNA damage in a blue light dependent manner. Expression of phrA is upregulated in response to light, with no photoreceptor or the photosynthetic electron transport being involved. The results reveal that singlet oxygen and hydrogen peroxide dependent signals are transmitted by the sigma(E) factor and the anti-sigma(E) factor ChrR affecting phrA expression, while superoxide anions do not stimulate phrA expression. Thus, the sigma(E) regulon is involved not only in the response to singlet oxygen but also in the hydrogen peroxide response.}, issn = {13500872}, keywords = {Amino_Acid_Sequence Anti-Bacterial_Agents Artificial_Gene_Fusion Bacterial Bacterial_Proteins Deoxyribodipyrimidine_Photo-Lyase Gene_Expression_Regulation Genes IFZ Light Microbial_Viability Molecular_Sequence_Data Peroxides Reporter Rhodobacter_sphaeroides Sequence_Alignment Sigma_Factor Singlet_Oxygen Superoxides Transcription_Factors Up-Regulation beta-Galactosidase } }