title: Possible involvement of nitric oxide and reactive oxygen species in glucose deprivation-induced activation of transcription factor rst2.
abstract: Glucose is one of the most important sources of cellular nutrition and glucose deprivation induces various cellular responses. In Schizosaccharomyces pombe, zinc finger protein Rst2 is activated upon glucose deprivation, and regulates gene expression via the STREP (stress response element of Schizosaccharomyces pombe) motif. However, the activation mechanism of Rst2 is not fully understood. We monitored Rst2 transcriptional activity in living cells using a Renilla luciferase reporter system. Hydrogen peroxide (H2O2) enhanced Rst2 transcriptional activity upon glucose deprivation and free radical scavenger inhibited Rst2 transcriptional activity upon glucose deprivation. In addition, deletion of the trx2 (+) gene encoding mitochondrial thioredoxin enhanced Rst2 transcriptional activity. Notably, nitric oxide (NO) generators enhanced Rst2 transcriptional activity upon glucose deprivation as well as under glucose-rich conditions. Furthermore, NO specific scavenger inhibited Rst2 transcriptional activity upon glucose deprivation. Altogether, our data suggest that NO and reactive oxygen species may be involved in the activation of transcription factor Rst2.
authors.affiliation: Division of Molecular Pharmacology and Pharmacogenomics, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Kobe, Japan.
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Kato
authors.forename: Xin
authors.initials: X
authors.lastname: Zhou
authors.forename: Yan
authors.initials: Y
authors.lastname: Ma
mesh_terms: D017868:Cyclic AMP-Dependent Protein Kinases / Q000378:metabolism; D017353:Gene Deletion; D015966:Gene Expression Regulation, Fungal / Q000187:drug effects; D017930:Genes, Reporter; D005947:Glucose / Q000172:deficiency*; D049410:Luciferases, Renilla / Q000378:metabolism; D009569:Nitric Oxide / Q000378:metabolism*; D010084:Oxidation-Reduction / Q000187:drug effects; D017382:Reactive Oxygen Species / Q000378:metabolism*; D026423:S-Nitroso-N-Acetylpenicillamine / Q000494:pharmacology; D012568:Schizosaccharomyces / Q000187:drug effects / Q000235:genetics / Q000378:metabolism*; D029702:Schizosaccharomyces pombe Proteins / Q000235:genetics / Q000378:metabolism*; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*; D014158:Transcription, Genetic / Q000187:drug effects; D015533:Transcriptional Activation / Q000187:drug effects / Q000235:genetics
chemical_list: C415971:RST2 protein, S pombe; D017382:Reactive Oxygen Species; D029702:Schizosaccharomyces pombe Proteins; D014157:Transcription Factors; D009569:Nitric Oxide; D026423:S-Nitroso-N-Acetylpenicillamine; D049410:Luciferases, Renilla; D017868:Cyclic AMP-Dependent Protein Kinases; D005947:Glucose