title: Reactive oxygen species-mediated regulation of mitochondrial biogenesis in the yeast Saccharomyces cerevisiae.
abstract: Mitochondrial biogenesis is a complex process. It necessitates the participation of both the nuclear and the mitochondrial genomes. This process is highly regulated, and mitochondrial content within a cell varies according to energy demand. In the yeast Saccharomyces cerevisiae, the cAMP pathway is involved in the regulation of mitochondrial biogenesis. An overactivation of this pathway leads to an increase in mitochondrial enzymatic content. Of the three yeast cAMP protein kinases, we have previously shown that Tpk3p is the one involved in the regulation of mitochondrial biogenesis. In this paper, we investigated the molecular mechanisms that govern this process. We show that in the absence of Tpk3p, mitochondria produce large amounts of reactive oxygen species that signal to the HAP2/3/4/5 nuclear transcription factors involved in mitochondrial biogenesis. We establish that an increase in mitochondrial reactive oxygen species production down-regulates mitochondrial biogenesis. It is the first time that a redox sensitivity of the transcription factors involved in yeast mitochondrial biogenesis is shown. Such a process could be seen as a mitochondria quality control process.
authors.affiliation: Institute of Biochemistry and Genetics of the Cell, CNRS UMR 5095, 1 Rue Camille Saint Saëns, 33077 Bordeaux Cedex, France.
authors.forename: Cyrille
authors.initials: C
authors.lastname: Chevtzoff
authors.forename: Edgar D
authors.initials: ED
authors.lastname: Yoboue
authors.forename: Anne
authors.initials: A
authors.lastname: Galinier
authors.forename: Louis
authors.initials: L
authors.lastname: Casteilla
authors.forename: Bertrand
authors.initials: B
authors.lastname: Daignan-Fornier
authors.forename: Michel
authors.initials: M
authors.lastname: Rigoulet
authors.forename: Anne
authors.initials: A
authors.lastname: Devin
mesh_terms: D000242:Cyclic AMP / Q000378:metabolism; D054751:Cyclic AMP-Dependent Protein Kinase Catalytic Subunits / Q000378:metabolism; D008928:Mitochondria / Q000201:enzymology / Q000378:metabolism*; D017382:Reactive Oxygen Species / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000166:cytology* / Q000201:enzymology / Q000378:metabolism*; D029701:Saccharomyces cerevisiae Proteins / Q000378:metabolism; D015398:Signal Transduction; D014157:Transcription Factors / Q000378:metabolism
chemical_list: D017382:Reactive Oxygen Species; D029701:Saccharomyces cerevisiae Proteins; D014157:Transcription Factors; D000242:Cyclic AMP; D054751:Cyclic AMP-Dependent Protein Kinase Catalytic Subunits; C509333:Tpk3 protein, S cerevisiae