LMPD Database

LMP006973

UniProt Annotations

Entry Information
Gene NamePpt1p
Protein EntryPPT1_YEAST
UniProt IDP53043
SpeciesYeast (S288c)
Comments
Comment typeDescription
Biophysicochemical PropertiesKinetic parameters: KM=34 mM for p-nitrophenylphosphate {ECO:0000269|PubMed:16442612}; pH dependence: Optimum pH is 7.8. {ECO:0000269|PubMed:16442612};
Biophysicochemical PropertiesKinetic parameters: KM=34 mM for p-nitrophenylphosphate ; pH dependence: Optimum pH is 7.8. ;
Catalytic Activity[a protein]-serine/threonine phosphate + H(2)O = [a protein]-serine/threonine + phosphate.
CofactorName=Mn(2+); Xref=ChEBI:CHEBI:29035; Evidence={ECO:0000250}; Note=Binds 2 manganese ions per subunit. {ECO:0000250};
CofactorName=Mn(2+); Xref=ChEBI:CHEBI:29035; Evidence= ; Note=Binds 2 manganese ions per subunit. ;
DomainThe TPR repeats mediate protein-protein interactions with substrate proteins, but also autoinhibit PPT1 phosphatase activity.
Enzyme RegulationStimulated by arachidonic acid and other unsaturated fatty acids, and by arachidoyl coenzyme A
Enzyme RegulationStimulated by arachidonic acid and other unsaturated fatty acids, and by arachidoyl coenzyme A. {ECO:0000269|PubMed:12694636}.
FunctionProtein phosphatase that specifically binds to and dephosphorylates the molecular chaperone Hsp90 (HSC82 and HSP82). Dephosphorylation positively regulates the Hsp90 chaperone machinery
FunctionProtein phosphatase that specifically binds to and dephosphorylates the molecular chaperone Hsp90 (HSC82 and HSP82). Dephosphorylation positively regulates the Hsp90 chaperone machinery. {ECO:0000269|PubMed:16407978}.
InductionExpression peaks in early log phase and decreases dramatically during the stationary phase (at protein level)
InductionExpression peaks in early log phase and decreases dramatically during the stationary phase (at protein level). {ECO:0000269|PubMed:12694636}.
InteractionP15108:HSC82; NbExp=3; IntAct=EBI-13796, EBI-8666; P02829:HSP82; NbExp=8; IntAct=EBI-13796, EBI-8659;
MiscellaneousPresent with 6990 molecules/cell in log phase SD medium
MiscellaneousPresent with 6990 molecules/cell in log phase SD medium. {ECO:0000269|PubMed:14562106}.
Sequence CautionSequence=CAA61596.1; Type=Frameshift; Positions=381; Evidence= ;
Sequence CautionSequence=CAA61596.1; Type=Frameshift; Positions=381; Evidence={ECO:0000305};
SimilarityBelongs to the PPP phosphatase family. PP-5 (PP-T) subfamily
SimilarityBelongs to the PPP phosphatase family. PP-5 (PP-T) subfamily. {ECO:0000305}.
SimilarityContains 3 TPR repeats. {ECO:0000255|PROSITE- ProRule:PRU00339}.
Subcellular LocationNucleus {ECO:0000269|PubMed:12694636, ECO:0000269|PubMed:14562095}.
SubunitInteracts (via TPR repeats) with HSP82 (via C-terminal MEEVD pentapeptide)
SubunitInteracts (via TPR repeats) with HSP82 (via C-terminal MEEVD pentapeptide). {ECO:0000269|PubMed:16407978}.