2015
Analysis of the Radiation-Damage-Free X‑ray Structure of Photosystem II in Light of EXAFS and QM/MM Data
Askerka M, Vinyard DJ, Wang J, Brudvig GW, Batista VS. Analysis of the Radiation-Damage-Free X‑ray Structure of Photosystem II in Light of EXAFS and QM/MM Data. Biochemistry 2015, 54: 1713-1716. PMID: 25710258, DOI: 10.1021/acs.biochem.5b00089.Peer-Reviewed Original ResearchConceptsPhotosystem II crystalsX-ray absorption fine structureExtended X-ray absorption fine structureAbsorption fine structurePhotosystem IIHigh-resolution structural modelS1 stateS0 stateOxygen-evolving complexRadiation damageX-ray diffraction studiesExtensive dark adaptationFine structureDiffraction studiesOxygen atomsManganese centersX-ray structureAtomsMM dataCrystalsStateEXAFSLightStructureResolution
2014
Structural Changes in the Oxygen-Evolving Complex of Photosystem II Induced by the S1 to S2 Transition: A Combined XRD and QM/MM Study
Askerka M, Wang J, Brudvig GW, Batista VS. Structural Changes in the Oxygen-Evolving Complex of Photosystem II Induced by the S1 to S2 Transition: A Combined XRD and QM/MM Study. Biochemistry 2014, 53: 6860-6862. PMID: 25347729, PMCID: PMC4230327, DOI: 10.1021/bi5011915.Peer-Reviewed Original Research
2013
S0‑State Model of the Oxygen-Evolving Complex of Photosystem II
Pal R, Negre CF, Vogt L, Pokhrel R, Ertem MZ, Brudvig GW, Batista VS. S0‑State Model of the Oxygen-Evolving Complex of Photosystem II. Biochemistry 2013, 52: 7703-7706. PMID: 24125018, DOI: 10.1021/bi401214v.Peer-Reviewed Original ResearchMeSH KeywordsManganeseModels, MolecularOxidation-ReductionPhotosystem II Protein ComplexPlant ProteinsConceptsOxygen-evolving complexS1 transitionQuantum mechanics/molecular mechanics modelsX-ray absorption fine structure spectroscopyExtended X-ray absorption fine structure (EXAFS) spectroscopyQM/MM modelAbsorption fine structure spectroscopyElectron transfer processHydrogen bonding networkFine structure spectroscopyPhotosystem IIX-ray diffraction dataMolecular mechanics modelPCET mechanismKok cycleWater moleculesWater splittingBonding networkS1 stateMn centersStructure spectroscopyS0 stateDiffraction dataMM modelSignificant rearrangementElectrostatic Effects on Proton Coupled Electron Transfer in Oxomanganese Complexes Inspired by the Oxygen-Evolving Complex of Photosystem II
Amin M, Vogt L, Vassiliev S, Rivalta I, Sultan MM, Bruce D, Brudvig GW, Batista VS, Gunner MR. Electrostatic Effects on Proton Coupled Electron Transfer in Oxomanganese Complexes Inspired by the Oxygen-Evolving Complex of Photosystem II. The Journal Of Physical Chemistry B 2013, 117: 6217-6226. PMID: 23570540, PMCID: PMC3753004, DOI: 10.1021/jp403321b.Peer-Reviewed Original ResearchConceptsOxomanganese complexesElectron transferOxygen-evolving complexComplexes 6Electrostatic effectsΜ-oxo bridgeDensity functional theory levelTerminal water ligandsBiomimetic oxomanganese complexesPhotosystem IIOxidation state transitionsContinuum electrostatic modelWater ligandsLigand substituentsOxidation midpoint potentialsOxo bridgeCalculated pKaProton transferElectrostatic interactionsTheory levelElectrostatic contributionMidpoint potentialMn oxidationElectrostatic modelFree energy
2012
Oxomanganese complexes for natural and artificial photosynthesis
Rivalta I, Brudvig GW, Batista VS. Oxomanganese complexes for natural and artificial photosynthesis. Current Opinion In Chemical Biology 2012, 16: 11-18. PMID: 22481113, PMCID: PMC3335890, DOI: 10.1016/j.cbpa.2012.03.003.Peer-Reviewed Original ResearchMeSH KeywordsBiomimetic MaterialsChloridesManganeseOxidation-ReductionOxygen CompoundsPhotosynthesisConceptsOxygen-evolving complexOxomanganese complexesArtificial photosynthesisQuantum mechanics/molecular mechanics (QM/MM) hybrid methodsArtificial photosynthetic devicesVisible-light photoexcitationInterfacial electron transferRecent X-ray dataX-ray crystallographyPhotosystem IIPhotosynthetic devicesMn catalystStructure/function relationsX-ray dataCarboxylate moietyElectron transferProton abstractionMn centersChromophoric linkersElectrostatic interactionsOEC structureCovalent attachmentS1 stateOxygen evolutionInexpensive materials
2008
Acetylacetonate Anchors for Robust Functionalization of TiO2 Nanoparticles with Mn(II)−Terpyridine Complexes
McNamara WR, Snoeberger RC, Li G, Schleicher JM, Cady CW, Poyatos M, Schmuttenmaer CA, Crabtree RH, Brudvig GW, Batista VS. Acetylacetonate Anchors for Robust Functionalization of TiO2 Nanoparticles with Mn(II)−Terpyridine Complexes. Journal Of The American Chemical Society 2008, 130: 14329-14338. PMID: 18831585, DOI: 10.1021/ja805498w.Peer-Reviewed Original ResearchMeSH KeywordsComputer SimulationElectron Spin Resonance SpectroscopyElectronsHydroxybutyratesLightManganeseMembranes, ArtificialModels, ChemicalModels, MolecularMolecular StructureNanoparticlesOrganometallic CompoundsOxidation-ReductionParticle SizePentanonesPhotochemistryPorosityPyridinesSensitivity and SpecificitySpectrophotometry, UltravioletSurface PropertiesTime FactorsTitaniumWaterConceptsInterfacial electron injectionTiO2 nanoparticlesRobust functionalizationTransition metal ionsVisible light sensitizationElectron injectionInterfacial electron transferColloidal thin filmsTerpy complexesPhotocatalytic complexesOxidation chemistryEffective catalystCoupling reactionElectron transferNanoparticlesVariety of scaffoldsComplex of caPhotovoltaic devicesFunctionalizationSubpicosecond time scaleAqueous suspensionOxidative conditionsThin filmsComplexesTransient measurementsA Model of the Oxygen-Evolving Center of Photosystem II Predicted by Structural Refinement Based on EXAFS Simulations
Sproviero EM, Gascón JA, McEvoy JP, Brudvig GW, Batista VS. A Model of the Oxygen-Evolving Center of Photosystem II Predicted by Structural Refinement Based on EXAFS Simulations. Journal Of The American Chemical Society 2008, 130: 6728-6730. PMID: 18457397, PMCID: PMC2678715, DOI: 10.1021/ja801979n.Peer-Reviewed Original ResearchConceptsOxygen-evolving complexSpectroscopic dataPhotosystem IIOxygen-Evolving CenterIntermediate oxidation statesHigh-resolution spectroscopic dataOxidation stateCatalytic cycleMetal clustersEXAFS simulationsPolarized EXAFSXRD modelStructural refinementEXAFSComputational structural modelsSingle crystalsStructural modelDanglerAmino acidsIonsComplexesCrystalsMnAcidStructureQuantum Mechanics/Molecular Mechanics Study of the Catalytic Cycle of Water Splitting in Photosystem II
Sproviero EM, Gascón JA, McEvoy JP, Brudvig GW, Batista VS. Quantum Mechanics/Molecular Mechanics Study of the Catalytic Cycle of Water Splitting in Photosystem II. Journal Of The American Chemical Society 2008, 130: 3428-3442. PMID: 18290643, DOI: 10.1021/ja076130q.Peer-Reviewed Original ResearchConceptsSubstrate water moleculesWater moleculesMu-oxo bridgeOxygen-evolving complexWater splittingQuantum mechanics/molecular mechanics (QM/MM) hybrid methodsQuantum Mechanics/Molecular Mechanics StudySolar fuel production systemsPhotosystem IIX-ray diffraction structureMolecular mechanics studySecond coordination shellCyanobacterium Thermosynechococcus elongatusOxomanganese clusterDioxygen evolutionTerminal ligandsXRD structureCatalytic clustersCP43-R357Ligand exchangeCatalytic reactionCatalytic cycleReaction intermediatesS0 stateNucleophilic attack
2006
Characterization of synthetic oxomanganese complexes and the inorganic core of the O2-evolving complex in photosystem II: Evaluation of the DFT/B3LYP level of theory
Sproviero EM, Gascon JA, McEvoy JP, Brudvig GW, Batista VS. Characterization of synthetic oxomanganese complexes and the inorganic core of the O2-evolving complex in photosystem II: Evaluation of the DFT/B3LYP level of theory. Journal Of Inorganic Biochemistry 2006, 100: 786-800. PMID: 16510187, DOI: 10.1016/j.jinorgbio.2006.01.017.Peer-Reviewed Original ResearchConceptsDFT/B3LYP levelOxomanganese complexesDFT/B3LYPB3LYP levelDensity functional theory (DFT) B3LYP levelBecke-3-LeeOxygen-evolving complexPhotosystem IISpin electronic statesInorganic coreImidazole ligandsMn complexesMu-oxoMagnetic experimental dataElectronic propertiesModest basis setsBasis setHybrid densityMechanistic studiesMn trimersComplexesMagnetic propertiesB3LYPTetramerBenchmark calculations
2005
The mechanism of photosynthetic water splitting
McEvoy J, Gascon J, Batista V, Brudvig G. The mechanism of photosynthetic water splitting. Photochemical & Photobiological Sciences 2005, 4: 940-949. PMID: 16307106, DOI: 10.1039/b506755c.Peer-Reviewed Original ResearchMeSH KeywordsComputer SimulationManganeseModels, MolecularOxidation-ReductionOxygenPhotosynthesisWaterConceptsProtein complex photosystem IIOxygen-evolving complexWater splittingPhotosynthetic water splittingGreen plant chloroplastsMolecular mechanics calculationsPhotosynthetic light reactionsRecent experimental resultsElectron transfer pathwayX-ray crystallographic modelSource of electronsProton concentration gradientPlant chloroplastsProduct protonsMechanics calculationsOxygenic photosynthesisDioxygen gasThylakoid lumenAerobic lifeElectronsThylakoid membranesCatalytic mechanismChemical energyPhotosystem IIManganese ions