Involvement of oxidative stress in the regulation of H(2)S production during ultradian metabolic oscillation of Saccharomyces cerevisiae.
Periodic evolution of H(2)S during aerobic chemostat culture of Saccharomyces cerevisiae resulted in ultradian metabolic oscillation via periodic inhibition of respiratory activity. To understand the nature of periodic H(2)S evolution, we investigated whether oxidative stress is associated with H(2)S production. The cellular oxidative states represented by intracellular level of lipid peroxides oscillated out of phase with the oscillation of dissolved O(2). Pulse addition of antioxidant, oxidative agent or inhibitor of antioxidation enzymes perturbed metabolic oscillation producing changes in H(2)S evolution. Analysis of H(2)S production profiles during perturbation of oscillation revealed that the amount of H(2)S production is closely linked with cellular oxidative states. Based on these results and our previous reports, we suggest that oxidative stresses result in periodic depletion of glutathione and cysteine, which in turn causes stimulation of the sulfate assimilation pathway and H(2)S production.
Kwak
Wie Jong
WJ
SK chemicals Ltd., 440-745, Suwon, South Korea.
Kwon
Gi Seok
GS
Jin
Ingnyol
I
Kuriyama
Hiroshi
H
Sohn
Ho Yong
HY
D000332:Aerobiosis; D001683:Biological Clocks / Q000502:physiology*; D015966:Gene Expression Regulation, Fungal; D005978:Glutathione / Q000378:metabolism; D006862:Hydrogen Sulfide / Q000378:metabolism*; D010084:Oxidation-Reduction; D018384:Oxidative Stress; D012441:Saccharomyces cerevisiae / Q000254:growth & development / Q000378:metabolism / Q000502:physiology*
D005978:Glutathione; D006862:Hydrogen Sulfide