title: Peroxiredoxin-mediated redox regulation of the nuclear localization of Yap1, a transcription factor in budding yeast.
abstract: A redox reaction involving cysteine thiol-disulfide exchange is crucial for the intracellular monitoring of oxidation status. The yeast transcription factor Yap1 is activated by formation of a disulfide bond, which inhibits nuclear export in response to peroxide stress, with resultant enhancement of the nuclear localization of Yap1. A glutathione peroxidase-like protein, Gpx3, which has peroxiredoxin activity, is required for formation of the disulfide bond in Yap1. We show here that the requirement for Gpx3 in the regulation of Yap1 is strain-specific. Thus, Tsa1, a ubiquitous thioredoxin peroxidase, is required for the activation of Yap1 in yeast strain Y700, which is derived from W303. The strain-specific utilization of different peroxiredoxins appears to be determined by Ybp1, a Yap1-binding protein. The Ybp1 of Y700 has a nonsense mutation, and a wild-type YBP1 gene can restore the Gpx3-dependent activation of Yap1. These results suggest that Tsa1, a ubiquitous peroxiredoxin, has the potential for transducing redox signals to a particular sensor protein.
authors.affiliation: Laboratory of Molecular and Biochemical Toxicology, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Miyagi, Japan.
authors.forename: Shoko
authors.initials: S
authors.lastname: Okazaki
authors.forename: Akira
authors.initials: A
authors.lastname: Naganuma
authors.forename: Shusuke
authors.initials: S
authors.lastname: Kuge
mesh_terms: D048868:Adaptor Proteins, Signal Transducing; D001483:Base Sequence; D002467:Cell Nucleus / Q000737:chemistry*; D005979:Glutathione Peroxidase / Q000378:metabolism*; D006861:Hydrogen Peroxide / Q000494:pharmacology; D008969:Molecular Sequence Data; D009154:Mutation; D010084:Oxidation-Reduction; D010544:Peroxidases / Q000378:metabolism*; D054464:Peroxiredoxins; D012441:Saccharomyces cerevisiae / Q000737:chemistry / Q000201:enzymology*; D029701:Saccharomyces cerevisiae Proteins / Q000032:analysis* / Q000235:genetics / Q000378:metabolism*; D015398:Signal Transduction; D014157:Transcription Factors / Q000032:analysis* / Q000378:metabolism
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D029701:Saccharomyces cerevisiae Proteins; D014157:Transcription Factors; C086677:YAP1 protein, S cerevisiae; C477161:YBP1 protein, S cerevisiae; D006861:Hydrogen Peroxide; D010544:Peroxidases; C496253:Tsa1 protein, S cerevisiae; D054464:Peroxiredoxins; D005979:Glutathione Peroxidase; C494438:HYR1 protein, S cerevisiae