2004
Investigation of the Functional Role of Ca2+ in the Oxygen‐Evolving Complex of Photosystem II: A pH‐Dependence Study of the Substitution of Ca2+ by Sr2+
Lee C, Brudvig G. Investigation of the Functional Role of Ca2+ in the Oxygen‐Evolving Complex of Photosystem II: A pH‐Dependence Study of the Substitution of Ca2+ by Sr2+. Journal Of The Chinese Chemical Society 2004, 51: 1221-1228. DOI: 10.1002/jccs.200400178.Peer-Reviewed Original ResearchOxygen-evolving complexOxygen evolution activityPhotosystem IISr 2Water oxidation chemistryOxidation of waterPH dependenceMetal ions resultsTetranuclear manganese clusterElectron acceptor sidePH dependence studyOxidation chemistryWater oxidationManganese clusterLewis acidOxygen-evolving activityOxygen evolutionEssential acidic groupAcidic groupsSubstitution of Ca2Ions resultsOnly ionsCatalytic siteCa 2Chloride ions
2001
Quantifying the Ion Selectivity of the Ca2+ Site in Photosystem II: Evidence for Direct Involvement of Ca2+ in O2 Formation †
Vrettos J, Stone D, Brudvig G. Quantifying the Ion Selectivity of the Ca2+ Site in Photosystem II: Evidence for Direct Involvement of Ca2+ in O2 Formation †. Biochemistry 2001, 40: 7937-7945. PMID: 11425322, DOI: 10.1021/bi010679z.Peer-Reviewed Original ResearchConceptsOxygen-evolving complexTrivalent metal ionsMetal ionsPSII samplesPhotosystem IISubstrate water moleculesSmall metal ionsO2 evolutionSteady-state enzyme kineticsWater oxidationAqua ionsWater moleculesLewis acidO2 formationIonic radiusIon selectivityKcal/Monovalent ionsIonsExtrinsic polypeptidesFree energyEnzyme kineticsStructural cofactorSr2Activity measurements