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H2O2 sensing through oxidation of the Yap1 transcription factor.
EMBO J. 2000 Oct 02; 19(19):5157-66.EJ

Abstract

The yeast transcription factor Yap1 activates expression of antioxidant genes in response to oxidative stress. Yap1 regulation involves nuclear accumulation, but the mechanism sensing the oxidative stress signal remains unknown. We provide biochemical and genetic evidence that upon H2O2 treatment, Yap1 is activated by oxidation and deactivated by enzymatic reduction with Yap1-controlled thioredoxins, thus providing a mechanism for autoregulation. Two cysteines essential for Yap1 oxidation are also essential for its activation by H2O2. The data are consistent with a model in which oxidation of Yap1 leads to disulfide bond formation with the resulting change of conformation masking recognition of the nuclear export signal by Crm1/Xpo1, thereby promoting nuclear accumulation of the protein. In sharp contrast to H2O2, diamide does not lead to the same Yap1 oxidized form and still activates mutants lacking cysteines essential for H2O2 activation, providing a molecular basis for differential activation of Yap1 by these oxidants. This is the first example of an H2O2-sensing mechanism in a eukaryote that exploits the oxidation of cysteines in order to respond rapidly to stress conditions.

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Authors+Show Affiliations

Delaunay A
Service de Biochimie et de Génétique Moléculaire, DBCM, DSV, CEA-Saclay, Gif-sur-Yvette, 91191 Cedex, France. toledano@jonas.saclay.cea.fr
Isnard AD
No affiliation info available
Toledano MB
No affiliation info available

MeSH

Adaptation, PhysiologicalBlotting, WesternCysteineDNA-Binding ProteinsDiamideFluorescent Antibody TechniqueFungal ProteinsHomeostasisHydrogen PeroxideModels, BiologicalOxidation-ReductionReverse Transcriptase Polymerase Chain ReactionSaccharomyces cerevisiaeSaccharomyces cerevisiae ProteinsThioredoxinsTranscription FactorsTwo-Hybrid System Techniques

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

11013218

Citation

Delaunay, A, et al. "H2O2 Sensing Through Oxidation of the Yap1 Transcription Factor." The EMBO Journal, vol. 19, no. 19, 2000, pp. 5157-66.
Delaunay A, Isnard AD, Toledano MB. H2O2 sensing through oxidation of the Yap1 transcription factor. EMBO J. 2000;19(19):5157-66.
Delaunay, A., Isnard, A. D., & Toledano, M. B. (2000). H2O2 sensing through oxidation of the Yap1 transcription factor. The EMBO Journal, 19(19), 5157-66.
Delaunay A, Isnard AD, Toledano MB. H2O2 Sensing Through Oxidation of the Yap1 Transcription Factor. EMBO J. 2000 Oct 2;19(19):5157-66. PubMed PMID: 11013218.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - H2O2 sensing through oxidation of the Yap1 transcription factor. AU - Delaunay,A, AU - Isnard,A D, AU - Toledano,M B, PY - 2000/10/3/pubmed PY - 2001/2/28/medline PY - 2000/10/3/entrez SP - 5157 EP - 66 JF - The EMBO journal JO - EMBO J VL - 19 IS - 19 N2 - The yeast transcription factor Yap1 activates expression of antioxidant genes in response to oxidative stress. Yap1 regulation involves nuclear accumulation, but the mechanism sensing the oxidative stress signal remains unknown. We provide biochemical and genetic evidence that upon H2O2 treatment, Yap1 is activated by oxidation and deactivated by enzymatic reduction with Yap1-controlled thioredoxins, thus providing a mechanism for autoregulation. Two cysteines essential for Yap1 oxidation are also essential for its activation by H2O2. The data are consistent with a model in which oxidation of Yap1 leads to disulfide bond formation with the resulting change of conformation masking recognition of the nuclear export signal by Crm1/Xpo1, thereby promoting nuclear accumulation of the protein. In sharp contrast to H2O2, diamide does not lead to the same Yap1 oxidized form and still activates mutants lacking cysteines essential for H2O2 activation, providing a molecular basis for differential activation of Yap1 by these oxidants. This is the first example of an H2O2-sensing mechanism in a eukaryote that exploits the oxidation of cysteines in order to respond rapidly to stress conditions. SN - 0261-4189 UR - https://www.unboundmedicine.com/medline/citation/11013218/H2O2_sensing_through_oxidation_of_the_Yap1_transcription_factor_ DB - PRIME DP - Unbound Medicine ER -