BAIT
PDI1
MFP1, TRG1, protein disulfide isomerase PDI1, L000001360, YCL043C
Protein disulfide isomerase; multifunctional protein of ER lumen, essential for formation of disulfide bonds in secretory and cell-surface proteins, unscrambles non-native disulfide bonds; key regulator of Ero1p; forms complex with Mnl1p that has exomannosidase activity, processing unfolded protein-bound Man8GlcNAc2 oligosaccharides to Man7GlcNAc2, promoting degradation in unfolded protein response; PDI1 has a paralog, EUG1, that arose from the whole genome duplication
GO Process (1)
GO Function (4)
GO Component (1)
Gene Ontology Biological Process
Gene Ontology Molecular Function
Gene Ontology Cellular Component
Saccharomyces cerevisiae (S288c)
PREY
ESS1
PIN1, PTF1, peptidylprolyl isomerase ESS1, L000000587, YJR017C
Peptidylprolyl-cis/trans-isomerase (PPIase); specific for phosphorylated serine and threonine residues N-terminal to proline; regulates phosphorylation of the RNAP II large subunit (Rpo21p) C-terminal domain (CTD); associates with phospho-Ser5 form of RNAP II in vivo; regulates phosphorylation of Ser7 within CTD; present along entire coding length of genes; represses initiation of CUTs; required for efficient termination of mRNA transcription and trimethylation of histone H3
GO Process (13)
GO Function (2)
GO Component (1)
Gene Ontology Biological Process
- histone H3-K4 trimethylation [IGI, IMP]
- negative regulation of histone deacetylation [IMP, IPI]
- negative regulation of protein ubiquitination involved in ubiquitin-dependent protein catabolic process [IMP]
- negative regulation of transcription from RNA polymerase II promoter [IGI, IMP]
- positive regulation of RNA polymerase II transcriptional preinitiation complex assembly [IGI]
- positive regulation of chromatin silencing at rDNA [IMP]
- positive regulation of protein dephosphorylation [IDA, IMP]
- positive regulation of transcription from RNA polymerase II promoter [IGI, IPI]
- protein peptidyl-prolyl isomerization [IDA, IMP]
- regulation of phosphorylation of RNA polymerase II C-terminal domain [IDA]
- regulation of transcription involved in G1/S transition of mitotic cell cycle [IMP]
- regulation of transcription involved in G2/M transition of mitotic cell cycle [IMP]
- termination of RNA polymerase II transcription [IGI, IMP]
Gene Ontology Molecular Function
Saccharomyces cerevisiae (S288c)
Synthetic Lethality
A genetic interaction is inferred when mutations or deletions in separate genes, each of which alone causes a minimal phenotype, result in lethality when combined in the same cell under a given condition.
Publication
The unfolded protein response is necessary but not sufficient to compensate for defects in disulfide isomerization.
Pdi1p (protein-disulfide isomerase) is a folding assistant of the endoplasmic reticulum (ER) that catalyzes disulfide formation and the isomerization of incorrect disulfides. Its disulfide forming activity is its essential function in Saccharomyces cerevisiae. A truncation mutant (Pdi1a') that is competent in disulfide formation but deficient in catalyzing isomerization has only a small effect on growth, although the maturation of isomerase-requiring ... [more]
J. Biol. Chem. Apr. 17, 2009; 284(16);10400-8 [Pubmed: 19233841]
Throughput
- High Throughput
Ontology Terms
- phenotype: inviable (APO:0000112)
- phenotype: heat sensitivity (APO:0000147)
Additional Notes
- diploid synthetic lethality array method (dSLAM)
Curated By
- BioGRID