2022
Myosin light chain phosphatase catalytic subunit dephosphorylates cardiac myosin via mechanisms dependent and independent of the MYPT regulatory subunits
Lee E, Liu Z, Nguyen N, Nairn A, Chang AN. Myosin light chain phosphatase catalytic subunit dephosphorylates cardiac myosin via mechanisms dependent and independent of the MYPT regulatory subunits. Journal Of Biological Chemistry 2022, 298: 102296. PMID: 35872014, PMCID: PMC9418503, DOI: 10.1016/j.jbc.2022.102296.Peer-Reviewed Original ResearchConceptsMyosin light chain phosphataseRegulatory light chainRegulatory subunitCatalytic subunitPhosphatase catalytic subunitMain catalytic subunitSmooth muscle myosin light chain phosphataseNon-muscle cellsMuscle myosin light chain phosphataseMyosin regulatory light chainMyosin light chain kinaseLight chain kinasePP1cβTrimeric proteinConditional knockout miceLight chain phosphatasePhosphatase activitySubunitsPhosphate/Chain kinaseMuscle pathogenesisPhysiological regulationKnockout animalsMain isoformsProteinPP1cβ dephosphorylates cardiac myosin by MYPT‐dependent and independent mechanisms
Lee E, Liu Z, Nguyen N, Nairn A, Chang A. PP1cβ dephosphorylates cardiac myosin by MYPT‐dependent and independent mechanisms. The FASEB Journal 2022, 36 DOI: 10.1096/fasebj.2022.36.s1.r3877.Peer-Reviewed Original ResearchMyosin light chain phosphataseRegulatory light chainCardiac myosinSmooth muscleNormal cardiac functionMain catalytic subunitSmooth muscle contractionMyosin light chain kinaseMyosin phosphatase targetCardiac functionPP1cβLight chain kinaseCatalytic subunitAccessory subunitsConstitutive phosphorylationProtein stabilityLight chain phosphataseKnockout animalsMuscle contractionMuscle pathogenesisConditional knockoutCardiac muscle myosinCardiac myocytesCardiac musclePhosphatase activity
2001
Mechanisms for Increased Levels of Phosphorylation of Elongation Factor-2 during Hibernation in Ground Squirrels †
Chen Y, Matsushita M, Nairn A, Damuni Z, Cai D, Frerichs K, Hallenbeck J. Mechanisms for Increased Levels of Phosphorylation of Elongation Factor-2 during Hibernation in Ground Squirrels †. Biochemistry 2001, 40: 11565-11570. PMID: 11560506, DOI: 10.1021/bi010649w.Peer-Reviewed Original ResearchConceptsEukaryotic elongation factor 2EEF-2 phosphorylationElongation factor 2Elongation phaseEEF-2 kinase activityProtein phosphatase 2AGround squirrelsLevel of phosphorylationFactor 2Phosphatase 2ACellular functionsCatalytic subunitUncharacterized mechanismKinase activityInhibitor 2Protein synthesisPhosphorylationPP2AHibernating animalsActive animalsHibernatorsReversible mechanismSevere reductionSquirrelsHibernation
2000
Cellular Mechanisms Regulating Protein Phosphatase-1 A KEY FUNCTIONAL INTERACTION BETWEEN INHIBITOR-2 AND THE TYPE 1 PROTEIN PHOSPHATASE CATALYTIC SUBUNIT*
Frederick D, Huang H, Yang J, Helps N, Cohen P, Nairn A, DePaoli-Roach A, Tatchell K, Connor J, Shenolikar S. Cellular Mechanisms Regulating Protein Phosphatase-1 A KEY FUNCTIONAL INTERACTION BETWEEN INHIBITOR-2 AND THE TYPE 1 PROTEIN PHOSPHATASE CATALYTIC SUBUNIT*. Journal Of Biological Chemistry 2000, 275: 18670-18675. PMID: 10748125, DOI: 10.1074/jbc.m909312199.Peer-Reviewed Original ResearchConceptsPP1 catalytic subunitCatalytic subunitType 1 protein phosphatase catalytic subunitAmino acidsProtein phosphatase catalytic subunitN-terminusProtein serine/threonineN-terminal 35 amino acidsInhibitor 2Phosphatase catalytic subunitTwo-hybrid analysisNovel regulatory interactionsProtein phosphatase 1Serine/threoninePull-down assaysSite-directed mutagenesisN-terminal sequencePP1 mutantsKey functional interactionsPP1 inhibitorPP1 enzymesPP1 inhibitionPhosphatase 1Regulatory interactionsSaccharomyces cerevisiae
1999
Mutation of Tyr307 and Leu309 in the Protein Phosphatase 2A Catalytic Subunit Favors Association with the α4 Subunit Which Promotes Dephosphorylation of Elongation Factor-2 †
Chung H, Nairn A, Murata K, Brautigan D. Mutation of Tyr307 and Leu309 in the Protein Phosphatase 2A Catalytic Subunit Favors Association with the α4 Subunit Which Promotes Dephosphorylation of Elongation Factor-2 †. Biochemistry 1999, 38: 10371-10376. PMID: 10441131, DOI: 10.1021/bi990902g.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAnion Exchange ResinsBacterial ProteinsCatalytic DomainChromatography, Ion ExchangeCOS CellsHemagglutininsLectinsLeucineMutagenesis, Site-DirectedOligopeptidesPeptide Elongation Factor 2Peptide Elongation FactorsPeptidesPhosphoprotein PhosphatasesPhosphoproteinsPhosphorylationPrecipitin TestsProtein Phosphatase 2Resins, SyntheticTransfectionTyrosineConceptsAlpha 4 proteinElongation factor 2AC dimerC subunitSpecific intracellular substratesProtein phosphatase 2ASites of phosphorylationAbc trimerCOS-7 cellsFactor 2B subunitC-terminal residuesTOR proteinsPhosphatase 2ANovel subunitCatalytic subunitTransient overexpressionSubstrate specificityCellular locationIntracellular substratesTransient expressionP70S6 kinaseSingle mutationProtein synthesisSubunits
1997
A molecular modeling analysis of the binding interactions between the okadaic acid class of natural product inhibitors and the ser-thr phosphatases, PP1 and PP2A
Gauss C, Sheppeck J, Nairn A, Chamberlin R. A molecular modeling analysis of the binding interactions between the okadaic acid class of natural product inhibitors and the ser-thr phosphatases, PP1 and PP2A. Bioorganic & Medicinal Chemistry 1997, 5: 1751-1773. PMID: 9354231, DOI: 10.1016/s0968-0896(97)00145-4.Peer-Reviewed Original ResearchConceptsSerine-threonine proteinOkadaic acid classSignal transduction pathwaysNatural product inhibitorsCatalytic subunitTransduction pathwaysPP1Endogenous substratesProduct inhibitorsMolecular modeling analysisSer-ThrAcid classPP2AImportant roleComputer-generated modelsInhibitorsSubunitsProteinPathwayCharacterization of the interaction between DARPP-32 and protein phosphatase 1 (PP-1): DARPP-32 peptides antagonize the interaction of PP-1 with binding proteins
Kwon Y, Huang H, Desdouits F, Girault J, Greengard P, Nairn A. Characterization of the interaction between DARPP-32 and protein phosphatase 1 (PP-1): DARPP-32 peptides antagonize the interaction of PP-1 with binding proteins. Proceedings Of The National Academy Of Sciences Of The United States Of America 1997, 94: 3536-3541. PMID: 9108011, PMCID: PMC20474, DOI: 10.1073/pnas.94.8.3536.Peer-Reviewed Original ResearchConceptsPP-1cPP-1C.PP-1DARPP-32Inhibitor 2Protein phosphatase 1Amino acid sequence analysisAmino acid residuesNH2-terminal regionAcid sequence analysisPhosphoinhibitor-1Threonine residuesPhosphatase 1Inhibitor-1Catalytic subunitCalyculin AOkadaic acidInhibitor proteinActive siteAcid residuesSequence analysisProteinEnzyme activityMotifResidues
1995
Isotype-specific Activation of Cystic Fibrosis Transmembrane Conductance Regulator-Chloride Channels by cGMP-dependent Protein Kinase II (∗)
French P, Bijman J, Edixhoven M, Vaandrager A, Scholte B, Lohmann S, Nairn A, de Jonge H. Isotype-specific Activation of Cystic Fibrosis Transmembrane Conductance Regulator-Chloride Channels by cGMP-dependent Protein Kinase II (∗). Journal Of Biological Chemistry 1995, 270: 26626-26631. PMID: 7592887, DOI: 10.1074/jbc.270.44.26626.Peer-Reviewed Original ResearchMeSH KeywordsAdenosine TriphosphateAnimalsCattleCell LineCell MembraneChloride ChannelsCyclic GMP-Dependent Protein KinasesCystic Fibrosis Transmembrane Conductance RegulatorEnzyme InhibitorsIntestinesIsoenzymesKineticsLungMacromolecular SubstancesMarine ToxinsMembrane PotentialsMicrovilliOxazolesPeptide FragmentsPhosphopeptidesPhosphorylationProtein Phosphatase 1Protein Tyrosine PhosphatasesRatsRecombinant ProteinsSwineTransfectionConceptsProtein kinaseType II cGMP-dependent protein kinaseCGMP-dependent protein kinase IICAMP-dependent protein kinaseCystic fibrosis transmembrane conductance regulator (CFTR) chloride channelCGMP-dependent protein kinaseCystic fibrosis transmembrane conductance regulatorFibrosis transmembrane conductance regulatorTransmembrane conductance regulatorProtein kinase IINIH 3T3 fibroblastsRat intestinal cell lineRecombinant CFTRCF 2Presence of cGMPProtein phosphatasePresence of ATPCAK activationPhosphatase 1Phosphopeptide mapsCatalytic subunitCalyculin ACatalytic fragmentKinase IIConductance regulatorThree-dimensional structure of the catalytic subunit of protein serine/threonine phosphatase-1
Goldberg J, Huang H, Kwon Y, Greengard P, Nairn A, Kuriyan J. Three-dimensional structure of the catalytic subunit of protein serine/threonine phosphatase-1. Nature 1995, 376: 745-753. PMID: 7651533, DOI: 10.1038/376745a0.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsBinding SitesCatalysisCrystallography, X-RayDopamine and cAMP-Regulated Phosphoprotein 32Escherichia coliHumansIntracellular Signaling Peptides and ProteinsMetalsMicrocystinsModels, MolecularMolecular Sequence DataNerve Tissue ProteinsNuclear ProteinsPeptides, CyclicPhosphoprotein PhosphatasesPhosphoproteinsProtein ConformationProtein Phosphatase 1ProteinsRabbitsRecombinant ProteinsRNA-Binding ProteinsSequence Homology, Amino AcidConceptsPhosphatase 1Protein serine/threonine phosphatase-1Serine/threonine phosphatase 1Mammalian protein phosphatase 1Protein phosphatase 1Potential binding sitesThree-dimensional structureCatalytic subunitRegulatory sequencesCatalytic domainCarboxy terminusΒ scaffoldBinding sitesActive siteSurface groovesTerminusSubunitsDomainProteinCrystal structureSitesTyrosineMetalloenzymesSequenceToxin
1994
Identification of the phosphorylation site for cAMP-dependent protein kinase on Na+,K(+)-ATPase and effects of site-directed mutagenesis.
Fisone G, Cheng S, Nairn A, Czernik A, Hemmings H, Höög J, Bertorello A, Kaiser R, Bergman T, Jörnvall H. Identification of the phosphorylation site for cAMP-dependent protein kinase on Na+,K(+)-ATPase and effects of site-directed mutagenesis. Journal Of Biological Chemistry 1994, 269: 9368-9373. PMID: 7510709, DOI: 10.1016/s0021-9258(17)37117-x.Peer-Reviewed Original ResearchMeSH Keywords1-Methyl-3-isobutylxanthineAmino Acid SequenceAnimalsBase SequenceColforsinCyclic AMP-Dependent Protein KinasesDNA PrimersKineticsMolecular Sequence DataMutagenesis, Site-DirectedPeptide MappingPeptidesPhosphoserineRatsRecombinant ProteinsSodium-Potassium-Exchanging ATPaseStructure-Activity RelationshipConceptsCAMP-dependent protein kinasePhosphorylation sitesProtein kinaseSignal transduction pathwaysWild-type enzymeSite-directed mutagenesisATPase alpha subunitAlpha 1 isoformCatalytic subunitTransduction pathwaysDependent phosphorylationSeryl residuesCOS cellsAlpha subunitIntact cellsATPaseKinasePhosphorylationEnzymeSubunitsCellsExperimental approachMutagenesisCDNAIsoforms
1993
Purification and characterization of calmodulin-dependent protein kinase III from rabbit reticulocytes and rat pancreas
Mitsui K, Brady M, Palfrey H, Nairn A. Purification and characterization of calmodulin-dependent protein kinase III from rabbit reticulocytes and rat pancreas. Journal Of Biological Chemistry 1993, 268: 13422-13433. PMID: 8514778, DOI: 10.1016/s0021-9258(19)38667-3.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsCalcium-Calmodulin-Dependent Protein KinasesCalmodulinCattleChromatography, GelElectrophoresis, Polyacrylamide GelElongation Factor 2 KinaseHeat-Shock ProteinsMolecular Sequence DataPancreasPeptide Elongation Factor 2Peptide Elongation FactorsPeptide MappingPhosphoproteinsPhosphorylationProtein KinasesRabbitsRatsReticulocytesSubstrate SpecificityConceptsEukaryotic elongation factor 2CaM kinase IIICalmodulin-dependent protein kinase IIIProtein kinase IIIKinase IIIProtein kinaseRabbit reticulocytesCAMP-dependent protein kinaseYeast EF-2Heat shock protein Hsp90Novel protein kinaseElongation factor 2Amino acid sequencingPhosphopeptide mappingSodium dodecyl sulfate-polyacrylamide gel electrophoresisDodecyl sulfate-polyacrylamide gel electrophoresisProtein Hsp90Catalytic subunitSulfate-polyacrylamide gel electrophoresisSeryl residuesMajor polypeptidesSubstrate ATPHsp90Factor 2Gel electrophoresis
1992
The protein kinase A-regulated cardiac CI− channel resembles the cystic fibrosis transmembrane conductance regulator
Nagel G, Hwang T, Nastiuk K, Nairn A, Gadsbyt D. The protein kinase A-regulated cardiac CI− channel resembles the cystic fibrosis transmembrane conductance regulator. Nature 1992, 360: 81-84. PMID: 1279437, DOI: 10.1038/360081a0.Peer-Reviewed Original ResearchMeSH KeywordsAdenosine TriphosphateAnimalsBiological Transport, ActiveBlotting, NorthernChloride ChannelsChlorineCystic Fibrosis Transmembrane Conductance RegulatorGuanosine TriphosphateGuinea PigsIn Vitro TechniquesIon Channel GatingMembrane PotentialsMembrane ProteinsMyocardiumPhosphorylationProtein KinasesReceptors, Adrenergic, betaRNAConceptsCystic fibrosis transmembrane conductance regulatorFibrosis transmembrane conductance regulatorTransmembrane conductance regulatorConductance regulatorCyclic AMP-dependent protein kinaseAMP-dependent protein kinasePKA catalytic subunitResult of phosphorylationPhosphorylated channelsCatalytic subunitProtein kinaseSingle-channel conductanceNucleoside triphosphatesPhosphorylationMembrane potentialEpithelial cellsChannel activationRegulatorChannel conductanceCystic fibrosisKinaseCardiac ventricular myocytesSubunitsProteinUnitary current amplitudecGMP-dependent protein kinase regulation of a chloride channel in T84 cells
Lin M, Nairn A, Guggino S. cGMP-dependent protein kinase regulation of a chloride channel in T84 cells. American Journal Of Physiology 1992, 262: c1304-c1312. PMID: 1317106, DOI: 10.1152/ajpcell.1992.262.5.c1304.Peer-Reviewed Original ResearchConceptsProtein kinaseChloride channelsIntestinal epithelial cellsCGMP-dependent protein kinaseProtein kinase regulationApical membraneDependent protein kinaseT84 cellsEpithelial cellsInhibitor of PKGKinase regulationCatalytic subunitCombination of ATPNonhydrolyzable formExcessive fluid secretionIntracellular faceEscherichia coliElevated guanosineSingle-channel recordingsATPKinasePKGLinear current-voltage relationshipCellsChloride secretion
1989
Chloride conductance regulated by cyclic AMP-dependent protein kinase in cardiac myocytes
Bahinski A, Nairn A, Greengard P, Gadsby D. Chloride conductance regulated by cyclic AMP-dependent protein kinase in cardiac myocytes. Nature 1989, 340: 718-721. PMID: 2475783, DOI: 10.1038/340718a0.Peer-Reviewed Original ResearchConceptsCyclic AMP-dependent protein kinaseAMP-dependent protein kinaseProtein kinaseChloride ion currentCatalytic subunitRegulatory proteinsKinase activationIon channelsKinaseChloride conductanceCalcium entrySingle-channel currentsCardiac myocytesCellsHeart cellsPhosphorylationAction potential repolarizationConductanceSubunitsProteinIntracellular dialysisMyocytesRegulationChannel currentsAdrenergic stimulation
1988
Cyclic AMP-dependent protein kinase opens chloride channels in normal but not cystic fibrosis airway epithelium
Li M, McCann J, Liedtket C, Nairn A, Greengard P, Welsh M. Cyclic AMP-dependent protein kinase opens chloride channels in normal but not cystic fibrosis airway epithelium. Nature 1988, 331: 358-360. PMID: 2448645, DOI: 10.1038/331358a0.Peer-Reviewed Original ResearchConceptsCAMP-dependent protein kinaseProtein kinaseRegulatory proteinsCl- channelsCyclic AMP-dependent protein kinaseAMP-dependent protein kinaseCommon lethal genetic diseaseNormal cellsLethal genetic diseaseApical Cl- channelsCatalytic subunitCell-free patchesCystic fibrosis airway epitheliaGenetic diseasesVariety of hormonesCF airway epitheliaCF cellsChloride channelsKinaseIntracellular levelsProteinAirway epitheliumCyclic AMPChloride secretionCells
1987
The cyclic nucleotide-dependent phosphorylation of aortic smooth muscle membrane proteins
Parks T, Nairn A, Greengard P, Jamieson J. The cyclic nucleotide-dependent phosphorylation of aortic smooth muscle membrane proteins. Archives Of Biochemistry And Biophysics 1987, 255: 361-371. PMID: 3036005, DOI: 10.1016/0003-9861(87)90404-8.Peer-Reviewed Original ResearchConceptsG-kinaseA-kinaseGs proteinMembrane proteinsCyclic nucleotide-dependent phosphorylationCAMP-dependent protein kinase activityCGMP-dependent protein kinaseKinase catalytic subunitEndogenous A-kinaseProtein kinase activityPeptide mappingTwo-dimensional peptide mappingMembrane-bound formCyclic nucleotidesHigh-salt washMuscle membrane proteinsCatalytic subunitFunctional homologyProtein kinasePhosphorylation stateCytosolic formKinase activitySalt washIntracellular concentrationSoluble form