2011
GroEL/GroES‐mediated protein folding
Horwich A, Tyagi N, Clare D, Saibil H. GroEL/GroES‐mediated protein folding. The FASEB Journal 2011, 25: 319.3-319.3. DOI: 10.1096/fasebj.25.1_supplement.319.3.Peer-Reviewed Original ResearchProtein foldingGroEL/GroES chaperonin systemGroE chaperonin systemSubstrate protein bindingNon-native speciesChaperonin systemGroEL ringApical domainConformational trajectoryDomain movementsGroES bindingGroESHydrophobic contactsGroELFoldingInitial associationBindingProtein bindingOpen ringCryoEMSpeciesATPDomainNumber of approaches
2001
ATP-Bound States of GroEL Captured by Cryo-Electron Microscopy
Ranson N, Farr G, Roseman A, Gowen B, Fenton W, Horwich A, Saibil H. ATP-Bound States of GroEL Captured by Cryo-Electron Microscopy. Cell 2001, 107: 869-879. PMID: 11779463, DOI: 10.1016/s0092-8674(01)00617-1.Peer-Reviewed Original ResearchConceptsCryo-electron microscopySalt-bridge contactsGroEL ringGroEL-GroESChaperonin GroELSalt bridge interactionsCryo-EMMolecular machinesADP complexGroELATPRing complexBridge interactionEffect of ATPCooperativityOpposite ringIntermediate domainGroESGeneral insightsComplexesPolypeptideDomainBridge contactsStructural modelAffinityGroEL/GroES-Mediated Folding of a Protein Too Large to Be Encapsulated
Chaudhuri T, Farr G, Fenton W, Rospert S, Horwich A. GroEL/GroES-Mediated Folding of a Protein Too Large to Be Encapsulated. Cell 2001, 107: 235-246. PMID: 11672530, DOI: 10.1016/s0092-8674(01)00523-2.Peer-Reviewed Original ResearchFolding of malate dehydrogenase inside the GroEL–GroES cavity
Chen J, Walter S, Horwich A, Smith D. Folding of malate dehydrogenase inside the GroEL–GroES cavity. Nature Structural & Molecular Biology 2001, 8: 721-728. PMID: 11473265, DOI: 10.1038/90443.Peer-Reviewed Original ResearchMeSH KeywordsAdenosine TriphosphateAnimalsBinding SitesChaperonin 10Chaperonin 60Chromatography, High Pressure LiquidDeuteriumDimerizationHydrogen BondingKineticsMalate DehydrogenaseMass SpectrometryMitochondria, HeartModels, MolecularPeptide FragmentsProtein BindingProtein DenaturationProtein FoldingProtein Structure, SecondaryProtein Structure, TertiaryProtein SubunitsSwineConceptsMalate dehydrogenaseNonnative substrate proteinGroEL-GroES cavitySubstrate proteinsProductive foldingChaperonin GroELApical domainGroESGroELMechanical unfoldingGlobal destabilizationSecondary structureHydrophilic chamberCentral cavityInitial proteinDeuterium exchangeFoldingProteinATPDehydrogenaseHydrophobic central cavityMass spectrometryOpen ringPolypeptideUnfoldingMechanisms of protein folding
Grantcharova V, Alm E, Baker D, Horwich A. Mechanisms of protein folding. Current Opinion In Structural Biology 2001, 11: 70-82. PMID: 11179895, DOI: 10.1016/s0959-440x(00)00176-7.Peer-Reviewed Original ResearchConceptsEscherichia coli chaperonin GroELNon-native proteinsATP-dependent formationCo-chaperonin GroESLowest free energy pathChaperonin GroELProtein foldingUnfolded proteinsLarge proteinsGroELNative stateNative structureContact orderProteinChaperoninKinetic trapsFoldingChaperonesGroESFree energy pathPolypeptideComplexesAllostery and protein substrate conformational change during GroEL/GroES-mediated protein folding
Saibil H, Horwich A, Fenton W. Allostery and protein substrate conformational change during GroEL/GroES-mediated protein folding. Advances In Protein Chemistry 2001, 59: 45-72. PMID: 11868280, DOI: 10.1016/s0065-3233(01)59002-6.Peer-Reviewed Original ResearchConceptsProtein foldingATP-dependent protein foldingChloroplasts of eukaryotesDouble-ring complexesCo-chaperonin GroESC-terminal portionChaperonin machineProtein folding reactionChaperonin systemSubstrate polypeptidesChaperonin complexGroEL-GroESHeptameric ringsGroEL subunitStructural biologyBiophysical approachesEquatorial domainATPase mechanismConformational changesSubstrate conformational changesFolding reactionNative formGroESFoldingGroEL
2000
Multivalent Binding of Nonnative Substrate Proteins by the Chaperonin GroEL
Farr G, Furtak K, Rowland M, Ranson N, Saibil H, Kirchhausen T, Horwich A. Multivalent Binding of Nonnative Substrate Proteins by the Chaperonin GroEL. Cell 2000, 100: 561-573. PMID: 10721993, DOI: 10.1016/s0092-8674(00)80692-3.Peer-Reviewed Original ResearchMeSH KeywordsAdenosine TriphosphateAnimalsBacterial ProteinsBinding SitesCattleChaperonin 10Chaperonin 60Chemical PhenomenaChemistry, PhysicalCryoelectron MicroscopyCystineEscherichia coliEthylmaleimideImage Processing, Computer-AssistedMacromolecular SubstancesMalate DehydrogenaseModels, MolecularPeptidesProtein BindingProtein ConformationProtein FoldingProtein Structure, TertiaryRibulose-Bisphosphate CarboxylaseStructure-Activity RelationshipThiosulfate SulfurtransferaseConceptsNonnative substrate proteinApical domainSubstrate proteinsChaperonin GroELWild-type domainCross-linking experimentsCochaperonin GroESNonnative proteinsProductive foldingGroEL ringSingle polypeptideHydrophobic residuesMalate dehydrogenaseBinary complex formationRubiscoProteinInside aspectMultivalent bindingGroELCentral cavityComplex formationBindingDomainGroESOpen ring
1998
STRUCTURE AND FUNCTION IN GroEL-MEDIATED PROTEIN FOLDING
Sigler P, Xu Z, Rye H, Burston S, Fenton W, Horwich A. STRUCTURE AND FUNCTION IN GroEL-MEDIATED PROTEIN FOLDING. Annual Review Of Biochemistry 1998, 67: 581-608. PMID: 9759498, DOI: 10.1146/annurev.biochem.67.1.581.Peer-Reviewed Original ResearchConceptsProtein foldingNative stateMechanism of chaperoninsCis ternary complexAsymmetric conformational changesFinal native stateNonnative polypeptidesCochaperonin GroESGroEL ringTrans ringATP hydrolysisGenetic informationChaperonin moleculesConformational changesFolding processFoldingTernary complexPolypeptideGroESATPBiochemical investigationsFinal stepChaperoninGroELComplexes[11] Construction of single-ring and two-ring hybrid versions of bacterial chaperonin GroEL
Horwich A, Burston S, Rye H, Weissman J, Fenton W. [11] Construction of single-ring and two-ring hybrid versions of bacterial chaperonin GroEL. Methods In Enzymology 1998, 290: 141-146. PMID: 9534157, DOI: 10.1016/s0076-6879(98)90013-1.Peer-Reviewed Original ResearchConceptsBacterial chaperonin GroELGreen fluorescent proteinChaperonin GroELDouble-ring assemblyAddition of GroESDouble-ring complexesSingle-ring versionUnliganded GroELBacterial chaperoninsGroEL ringNeighboring subunitProtein foldsGroELEquatorial domainNonnative formsFluorescent proteinGroESNative stateNative formCentral channelCritical signalingSubunitsSignalingForm contactsNormal ATP
1997
Distinct actions of cis and trans ATP within the double ring of the chaperonin GroEL
Rye H, Burston S, Fenton W, Beechem J, Xu Z, Sigler P, Horwich A. Distinct actions of cis and trans ATP within the double ring of the chaperonin GroEL. Nature 1997, 388: 792-798. PMID: 9285593, DOI: 10.1038/42047.Peer-Reviewed Original ResearchConceptsTrans ringProductive foldingGroES complexChaperonin GroELCis ringCo-chaperone GroESDouble-ring complexesCis ternary complexNon-hydrolysable ATPHydrolysis of ATPGroEL functionGroEL-ATPATP bindingEfficient foldingBinds ATPATP hydrolysisGroESMutant formsMalate dehydrogenaseGroELAMP-PNPDouble-ring structureFoldingTernary complexATPChaperonin-Mediated Folding in the Eukaryotic Cytosol Proceeds through Rounds of Release of Native and Nonnative Forms
Farr G, Scharl E, Schumacher R, Sondek S, Horwich A. Chaperonin-Mediated Folding in the Eukaryotic Cytosol Proceeds through Rounds of Release of Native and Nonnative Forms. Cell 1997, 89: 927-937. PMID: 9200611, DOI: 10.1016/s0092-8674(00)80278-0.Peer-Reviewed Original ResearchConceptsRounds of releaseSubstrate proteinsNonnative formsNative formChaperonin-mediated foldingEukaryotic cytosolic chaperoninATP-dependent foldingIntact Xenopus oocytesCytosolic chaperoninBacterial chaperoninsEukaryotic cytosolChaperoninNative stateXenopus oocytesEssential roleSingle roundFoldingProteinActinTubulinOverall mechanismGroELTransducinCytosolSmall fractionGroEL‐Mediated protein folding
Fenton W, Horwich A. GroEL‐Mediated protein folding. Protein Science 1997, 6: 743-760. PMID: 9098884, PMCID: PMC2144759, DOI: 10.1002/pro.5560060401.Peer-Reviewed Original ResearchConceptsGroEL-GroESNonnative polypeptidesSubstrate proteinsATP bindingProtein foldingHomologous proteinsNonnative formsPrimary structureConformational changesGroELTernary complexPolypeptideAssociation 5FoldingProteinBindingChaperonesGroESConformationEnergy landscapeRole of hydrophobicityPathway 3RolePathwayComplex C.Native-like structure of a protein-folding intermediate bound to the chaperonin GroEL
Goldberg M, Zhang J, Sondek S, Matthews C, Fox R, Horwich A. Native-like structure of a protein-folding intermediate bound to the chaperonin GroEL. Proceedings Of The National Academy Of Sciences Of The United States Of America 1997, 94: 1080-1085. PMID: 9037009, PMCID: PMC19747, DOI: 10.1073/pnas.94.4.1080.Peer-Reviewed Original ResearchConceptsNative-like structureChaperonin GroELDihydrofolate reductaseProtein-folding intermediatesNative dihydrofolate reductaseStopped-flow fluorescence experimentsNonnative proteinsSubstrate proteinsProductive foldingPresence of ATPHuman dihydrofolate reductaseHydrogen-deuterium exchangeGroELPrimary structureProteinCentral channelHydrophobic interactionsFluorescence experimentsGroESFoldingSpeciesReductaseNMR spectroscopyDistant partsATP
1996
Putting a lid on protein folding: structure and function of the co-chaperonin, GroES
Fenton W, Weissman J, Horwich A. Putting a lid on protein folding: structure and function of the co-chaperonin, GroES. Cell Chemical Biology 1996, 3: 157-161. PMID: 8807841, DOI: 10.1016/s1074-5521(96)90257-4.Peer-Reviewed Original Research
1995
Unliganded GroEL at 2.8 Å: structure and functional implications
Sigler P, Horwich A. Unliganded GroEL at 2.8 Å: structure and functional implications. Philosophical Transactions Of The Royal Society B Biological Sciences 1995, 348: 113-119. PMID: 7770481, DOI: 10.1098/rstb.1995.0052.Peer-Reviewed Original ResearchConceptsATP-binding pocketCentral channelUnfolded polypeptidesApical domainThree-dimensional structureExtensive mutagenesisMutational studiesDyad symmetryC-terminusDistinct domainsGroELATP analogBiochemical studiesStructural scaffoldFunctional implicationsHigh saltSubunitsDomainChaperoninGroESMutagenesisEntire lengthCrystal formsPolypeptideSymmetric ring
1994
GroEL-mediated protein folding proceeds by multiple rounds of binding and release of nonnative forms
Weissman J, Kashi Y, Fenton W, Horwich A. GroEL-mediated protein folding proceeds by multiple rounds of binding and release of nonnative forms. Cell 1994, 78: 693-702. PMID: 7915201, DOI: 10.1016/0092-8674(94)90533-9.Peer-Reviewed Original ResearchConceptsCochaperonin GroESMultiple roundsGroEL functionChaperonin GroELKinetic partitioningMutant formsNonnative conformationsNonnative formsGroELAddition of ATPGroEL moleculeTryptophan fluorescenceFolding reactionDouble-ring structureUnfolded statePolypeptideDiverse setGroESProteolysisProteinATPBindingFateConformationComplexes
1993
Folding in vivo of bacterial cytoplasmic proteins: Role of GroEL
Horwich A, Low K, Fenton W, Hirshfield I, Furtak K. Folding in vivo of bacterial cytoplasmic proteins: Role of GroEL. Cell 1993, 74: 909-917. PMID: 8104102, DOI: 10.1016/0092-8674(93)90470-b.Peer-Reviewed Original ResearchMeSH KeywordsATP-Binding Cassette TransportersBacterial ProteinsBacteriophage lambdaCarrier ProteinsChaperonin 60Citrate (si)-SynthaseEscherichia coliEscherichia coli ProteinsHeat-Shock ProteinsKetoglutarate Dehydrogenase ComplexMaltoseMaltose-Binding ProteinsMethionineMonosaccharide Transport ProteinsOperonOrnithine CarbamoyltransferasePlasmidsPolyribonucleotide NucleotidyltransferasePromoter Regions, GeneticProtein BiosynthesisProtein FoldingProtein Sorting SignalsSequence DeletionTemperatureTransduction, GeneticConceptsCytoplasmic proteinsTemperature-sensitive lethal mutationBacterial cytoplasmic proteinsE. coli chaperonin GroELMaltose-binding proteinRole of GroELNative tertiary structureEssential genesChaperonin GroELBacterial cytoplasmMutant cellsLethal mutationsNonpermissive temperatureGenetic informationPolynucleotide phosphorylaseGeneral translationTertiary structureCitrate synthasePathways of transferKetoglutarate dehydrogenaseGeneral roleGroELNative conformationProteinTest proteinsHigh-resolution gold labeling
Hainfeld J, Furuya F, Carbone K, Simon M, Lin B, Braig K, Horwich A, Safer D, Blechschmidt B, Sprinzl M, Ofengand J, Boublik M. High-resolution gold labeling. Microscopy And Microanalysis 1993, 51: 330-331. DOI: 10.1017/s0424820100147491.Peer-Reviewed Original ResearchGroEL complexDihydrofolate reductaseNascent polypeptide chainsChaperonin GroELMacromolecular complexesOligomeric complexesSmall proteinsActive proteinPolypeptide chainGroELChaperoninGold clustersCentral cavityGold labelingSpecific sitesGold compoundsModel substrateProteinMacromolecular sitesComplexesExternal surfaceRibosomesReductaseSitesChainA polypeptide bound by the chaperonin groEL is localized within a central cavity.
Braig K, Simon M, Furuya F, Hainfeld J, Horwich A. A polypeptide bound by the chaperonin groEL is localized within a central cavity. Proceedings Of The National Academy Of Sciences Of The United States Of America 1993, 90: 3978-3982. PMID: 8097882, PMCID: PMC46429, DOI: 10.1073/pnas.90.9.3978.Peer-Reviewed Original ResearchConceptsChaperonin GroELGroEL complexEscherichia coli chaperonin GroELOligomeric protein complexesDihydrofolate reductaseMolten globule-like intermediateCentral cavityPolypeptide chain foldingChaperonin ringsChaperonin complexProtein complexesCellular compartmentsDHFR moleculeMonomeric membersPresence of MgATPGroELNative stateEssential roleCompact conformationPolypeptideComplexesCochaperoninChaperoninMultiple sitesIntermediates
1991
Chaperonin-mediated protein folding at the surface of groEL through a 'molten globule'-like intermediate
Martin J, Langer T, Boteva R, Schramel A, Horwich A, Hartl F. Chaperonin-mediated protein folding at the surface of groEL through a 'molten globule'-like intermediate. Nature 1991, 352: 36-42. PMID: 1676490, DOI: 10.1038/352036a0.Peer-Reviewed Original ResearchConceptsChaperonin-mediated proteinMolten globule-like intermediateMolten globule stateGroEL proteinProtein monomersMonomeric enzymeProtein structureTertiary structureATP moleculesGlobule stateGeneral mechanismMg-ATPGroESGroELFoldingProteinActive processPolypeptideEnzymeChain foldingConformationVivo