2015
Mechanism of Manganese-Catalyzed Oxygen Evolution from Experimental and Theoretical Analyses of 18O Kinetic Isotope Effects
Khan S, Yang K, Ertem M, Batista V, Brudvig G. Mechanism of Manganese-Catalyzed Oxygen Evolution from Experimental and Theoretical Analyses of 18O Kinetic Isotope Effects. ACS Catalysis 2015, 5: 7104-7113. DOI: 10.1021/acscatal.5b01976.Peer-Reviewed Original ResearchBiomimetic oxomanganese complexesO2 evolutionOxomanganese complexesElusive reaction intermediatesKinetic oxygen isotope effectO2-evolving complexPhotosystem IIFirst bindsTurnover conditionsPrevious kinetic studiesComplexesOxygen evolutionComplete mechanismEvolutionMechanismSpeciesBindsStrong evidenceIntermediatesTurnoverHighest barrier stepKinetic isotope effects
2002
Proton-Coupled Electron Transfer Involving Tyrosine Z in Photosystem II †
Kühne H, Brudvig G. Proton-Coupled Electron Transfer Involving Tyrosine Z in Photosystem II †. The Journal Of Physical Chemistry B 2002, 106: 8189-8196. DOI: 10.1021/jp0206222.Peer-Reviewed Original ResearchO2-evolving complexYZ oxidationOxidation reactionTyrosine ZProton-coupled electron transfer stepsManganese-depleted photosystem IIPhotosystem IIWater oxidation reactionOxidation of waterOxidation of YZElectron transfer stepProton inventory experimentsProton movementWater oxidationElectron transferRedox mechanismNumber of protonsTransfer stepOxidation processOnset temperatureSecondary donorDeuterated samplesOxidationIsotope effectChloride ions
2000
Low-Temperature Turnover Control of Photosystem II Using Novel Metal-Containing Redox-Active Herbicides
Karki L, Lakshmi K, Szalai V, Brudvig G. Low-Temperature Turnover Control of Photosystem II Using Novel Metal-Containing Redox-Active Herbicides. Journal Of The American Chemical Society 2000, 122: 5180-5188. DOI: 10.1021/ja994138x.Peer-Reviewed Original ResearchO2-evolving complexQB siteLong-range electron transferElectron acceptor groupsS-state cyclingStable charge separationPentane spacerHydrocarbon spacerUrea groupsElectron transferCharge separationEPR resultsStoichiometric reductionTwo-electronHerbicide derivativesEPR studiesElectron acceptorMoietyPhenylurea herbicidesDonor sidePhotosystem IISpacerComplexesLow temperatureInhibition studiesLow-Frequency Resonance Raman Characterization of the Oxygen-Evolving Complex of Photosystem II
Cua A, Stewart D, Reifler M, Brudvig G, Bocian D. Low-Frequency Resonance Raman Characterization of the Oxygen-Evolving Complex of Photosystem II. Journal Of The American Chemical Society 2000, 122: 2069-2077. DOI: 10.1021/ja9932885.Peer-Reviewed Original ResearchO2-evolving complexMn4 clusterS2 statePhotosystem IIRedox-active tyrosinesLow-energy electronic transitionsRaman spectraElectronic transitionsS1 stateVibrational modesOxygen-Evolving ComplexRaman studiesS2 oxidation stateRaman scatteringResonance Raman CharacterizationExcitation Raman spectroscopyTetramanganese clusterCoordination environmentNIR transitionsVibrational spectroscopyOxidation stateMolecular structureD2O/H2O exchangeOH groupsRaman spectroscopyKinetic analysis of the O2-forming reaction between [Mn(III)(dpa)2]− (dpa=dipicolinate) and potassium peroxomonosulfate
Limburg J, Crabtree* R, Brudvig* G. Kinetic analysis of the O2-forming reaction between [Mn(III)(dpa)2]− (dpa=dipicolinate) and potassium peroxomonosulfate. Inorganica Chimica Acta 2000, 297: 301-306. DOI: 10.1016/s0020-1693(99)00362-x.Peer-Reviewed Original ResearchO2-evolving complexPotassium peroxomonosulfateO2 evolutionComplexes of formulaO2-evolving reactionsFour-electron oxidationPhotosynthetic water oxidationPhotosystem IITerpy complexesWater oxidationManganese complexesKinetic analysisSide reactionsBond formationMolecular oxygenOxygen atomsReactionComplexesPeroxomonosulfateKey stepOxidationKobsManganeseTerpyridineTerpy
1998
Catalase-Free Photosystem II: The O2-Evolving Complex Does Not Dismutate Hydrogen Peroxide †
Sheptovitsky Y, Brudvig G. Catalase-Free Photosystem II: The O2-Evolving Complex Does Not Dismutate Hydrogen Peroxide †. Biochemistry 1998, 37: 5052-5059. PMID: 9548736, DOI: 10.1021/bi972872s.Peer-Reviewed Original Research
1997
Fluorescence Quenching by Chlorophyll Cations in Photosystem II †
Schweitzer R, Brudvig G. Fluorescence Quenching by Chlorophyll Cations in Photosystem II †. Biochemistry 1997, 36: 11351-11359. PMID: 9298954, DOI: 10.1021/bi9709203.Peer-Reviewed Original ResearchConceptsFluorescence quenchingPhotosystem IIElectron donorDonor sideElectron paramagnetic resonance spectroscopyRedox-active tyrosinesRedox-active centersCharge-separated stateSteady-state fluorescence quenchingParamagnetic resonance spectroscopyRedox-active componentsElectron donor sideElectron transfer pathwayCytochrome b559Redox stateFluorescence intensityO2-evolving complexPrimary electron donorReversible oxidationChlorophyll cationElectron donationFurther oxidationChlZRapid photooxidationDifferent sample preparation
1986
Mechanism for photosynthetic O2 evolution.
Brudvig G, Crabtree R. Mechanism for photosynthetic O2 evolution. Proceedings Of The National Academy Of Sciences Of The United States Of America 1986, 83: 4586-4588. PMID: 3460059, PMCID: PMC323785, DOI: 10.1073/pnas.83.13.4586.Peer-Reviewed Original ResearchConceptsO2-evolving complexManganese complexesPhotosynthetic O2 evolutionS2 stateCubane-like complexCubane-like structureIntermediate oxidation statesEPR spectral dataO2 evolutionSpectral dataDisplacement of O2Coordination chemistryOxidation stateO bondS4 stateRecent EPRUV spectral dataManganese sitesStructural conversionComplexesMolecular mechanismsMn4O4ChemistryStructureEPR
1985
Active and resting states of the O2-evolving complex of photosystem II.
Beck W, De Paula J, Brudvig G. Active and resting states of the O2-evolving complex of photosystem II. Biochemistry 1985, 24: 3035-43. PMID: 2990539, DOI: 10.1021/bi00333a035.Peer-Reviewed Original ResearchConceptsO2-evolving complexEPR signalPSII membranesLow-temperature electron paramagnetic resonance (EPR) spectroscopyPhotosystem IIElectron paramagnetic resonance spectroscopyS2-state multiline EPR signalParamagnetic resonance spectroscopyS2 state EPR signalsMn sitesMultiline EPR signalSpinach photosystem IIThylakoid membranesCatalytic reductionChemical propertiesResonance spectroscopyDifferent hyperfine structureO2
1983
PROPERTIES OF THE S2 STATE ASSOCIATED WITH O2 EVOLUTION
Brudvig G, Casey J, Sauer K. PROPERTIES OF THE S2 STATE ASSOCIATED WITH O2 EVOLUTION. 1983, 159-164. DOI: 10.1016/b978-0-12-372360-4.50023-7.Peer-Reviewed Original ResearchS2 stateMultiline electron paramagnetic resonance (EPR) signalParamagnetic speciesO2 evolutionOxidation state changesPhotosynthetic water oxidationFinal oxidation productsElectron paramagnetic resonance signalS2 state EPR signalsCharge separation eventsS-state advancementMolecule of O2State EPR signalsParamagnetic resonance signalO2-evolving complexWater oxidationPhotosystem IIUnpaired electronOxidation productsEPR signalHyperfine structureResonance signalsSpinach chloroplastsSpeciesHyperfine lines