title: Characterization of Cu- and Zn-containing superoxide dismutase of Rhodobacter sphaeroides.
abstract: Rhodobacter sphaeroides has a cuprozinc-containing superoxide dismutase (CuZnSOD) in its periplasm in addition to the cytoplasmic SOD that appears to contain iron (FeSOD). The FeSOD is constitutively expressed under the growth conditions examined, whereas the CuZnSOD is detected only when the light-harvesting complexes are found. The CuZnSOD expression is regulated post-transcriptionally, and the enzyme appears to protect the photoheterotrophic cells from periplasmic superoxide that may be generated by exposure of the cells to low O2 under the illuminated conditions at 10 W/m2.
authors.affiliation: Department of Life Science, Sogang University, Seoul 121-742, Republic of Korea.
authors.forename: Dhong Hyo
authors.initials: DH
authors.lastname: Kho
authors.forename: Sang-Bae
authors.initials: SB
authors.lastname: Yoo
authors.forename: Ju-Sim
authors.initials: JS
authors.lastname: Kim
authors.forename: Eui-Jin
authors.initials: EJ
authors.lastname: Kim
authors.forename: Jeong K
authors.initials: JK
authors.lastname: Lee
mesh_terms: D003600:Cytosol / Q000201:enzymology; D007527:Isoenzymes / Q000235:genetics / Q000378:metabolism; D016296:Mutagenesis; D011499:Protein Processing, Post-Translational; D011994:Recombinant Proteins / Q000378:metabolism; D012242:Rhodobacter sphaeroides / Q000201:enzymology* / Q000235:genetics / Q000254:growth & development; D017384:Sequence Deletion; D013482:Superoxide Dismutase / Q000235:genetics* / Q000378:metabolism*
chemical_list: D007527:Isoenzymes; D011994:Recombinant Proteins; D013482:Superoxide Dismutase