cAMP regulates respiration and oxidative stress during rehydration in Anabaena sp. PCC 7120.
Cellular cAMP level increased dramatically upon rehydration following dehydration for 24h in Anabaena sp. PCC 7120, but not in disruptant of an adenylate cyclase gene, cyaC. Oxygen consumption in the cyaC disruptant upon rehydration was higher than that in wild-type strain. Determination of lipid peroxidation and protein carbonylation of the cells revealed greater oxidative stress in the cyaC disruptant than in the wild-type strain during rehydration. Addition of cAMP or KCN to the cyaC disruptant decreased cellular oxygen consumption upon rehydration and oxidative damage. These results suggest that respiration upon rehydration is regulated by cAMP and that the higher respiration activity results in more oxidative damage in cyaC disruptant.
Higo
Akiyoshi
A
Department of Molecular Biology, Faculty of Science, Saitama University, 255 Shimo-Ohkubo, Sakura-ku, Saitama City, Saitama 338-8570, Japan.
Ikeuchi
Masahiko
M
Ohmori
Masayuki
M
D000262:Adenylyl Cyclases / Q000235:genetics; D017033:Anabaena / Q000187:drug effects / Q000235:genetics / Q000378:metabolism*; D000242:Cyclic AMP / Q000235:genetics / Q000378:metabolism*; D015227:Lipid Peroxidation; D018384:Oxidative Stress; D010100:Oxygen / Q000378:metabolism*; D011190:Potassium Cyanide / Q000494:pharmacology; D014867:Water / Q000378:metabolism*
D014867:Water; D000242:Cyclic AMP; D000262:Adenylyl Cyclases; D011190:Potassium Cyanide; D010100:Oxygen