AP-1-like transcription factor YAP1 - P19880 (AP1_YEAST)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for P19880: 1
Transcription activator involved in oxidative stress response and redox homeostasis. Regulates the transcription of genes encoding antioxidant enzymes and components of the cellular thiol-reducing pathways, including the thioredoxin system (TRX2, TRR1), the glutaredoxin system (GSH1, GLR1), superoxide dismutase (SOD1, SOD2), glutathione peroxidase (GPX2), and thiol-specific peroxidases (TSA1, AHP1). The induction of some of these genes requires the cooperative action of both, YAP1 and SKN7. Preferentially binds to promoters with the core binding site 5'-TTA[CG]TAA-3'. Activity of the transcription factor is controlled through oxidation of specific cysteine residues resulting in the alteration of its subcellular location. Oxidative stress (as well as carbon stress, but not increased temperature, acidic pH, or ionic stress) induces nuclear accumulation and as a result YAP1 transcriptional activity. Activation by hydrogen peroxide or thiol-reactive chemicals elicit distinct adaptive gene responses. Nuclear export is restored when disulfide bonds are reduced by thioredoxin (TRX2), whose expression is controlled by YAP1, providing a mechanism for negative autoregulation. When overexpressed, YAP1 confers pleiotropic drug-resistance and increases cellular tolerance to cadmium, iron chelators and zinc. UniProt
Pathway Maps
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Subunit Structure
Interacts independent of oxidation state in the cytoplasm with the karyopherin PSE1/KAP121 (and less strongly with KAP123). The reduced form of YAP1 interacts in the nucleus with the nuclear export protein CRM1, and in the cytoplasm with YBP1 and the peroxiredoxin HYR1/GPX3/ORP1. Interacts with RBG1. UniProt
Contains two cysteine rich domains (CRD), referred to as the N- and C-terminal CRD's, n-CRD (Cys-303, Cys-310 and Cys-315) and c-CRD (Cys-598, Cys-620 and Cys-629), respectively. Cys-315 is not conserved in orthologs in other yeast species. A nuclear export signal is embedded in the c-CRD, with which the nuclear export protein CRM1/exportin 1 interacts only in the absence of disulfide bonds (or otherwise oxidized cysteines) within the c-CRD or between the c-CRD and the n-CRD. UniProt
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