2014
Conformational Preferences Underlying Reduced Activity of a Thermophilic Ribonuclease H
Stafford KA, Trbovic N, Butterwick JA, Abel R, Friesner RA, Palmer AG. Conformational Preferences Underlying Reduced Activity of a Thermophilic Ribonuclease H. Journal Of Molecular Biology 2014, 427: 853-866. PMID: 25550198, PMCID: PMC4349505, DOI: 10.1016/j.jmb.2014.11.023.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceBinding SitesCrystallography, X-RayEscherichia coliHot TemperatureHydrophobic and Hydrophilic InteractionsModels, MolecularMolecular Dynamics SimulationMutationNuclear Magnetic Resonance, BiomolecularPrincipal Component AnalysisProtein BindingProtein ConformationRibonuclease HThermodynamicsThermus thermophilusConceptsE. coli homologWild-type proteinRibonuclease HE. coli mutantsGlycine-rich regionMesophilic homologsThermophilus enzymeColi mutantsSubstrate bindingThermophilic proteinsImportant residuesThermus thermophilusConformational dynamicsGlycine residueMesophilic enzymesActive conformationLoop regionAtom MD simulationsConformational basisReduced activityEscherichia coliHomologProteinPosition 80MD simulations
2009
Pulsed Electron−Electron Double-Resonance Determination of Spin-Label Distances and Orientations on the Tetrameric Potassium Ion Channel KcsA
Endeward B, Butterwick JA, MacKinnon R, Prisner TF. Pulsed Electron−Electron Double-Resonance Determination of Spin-Label Distances and Orientations on the Tetrameric Potassium Ion Channel KcsA. Journal Of The American Chemical Society 2009, 131: 15246-15250. PMID: 19919160, PMCID: PMC2779547, DOI: 10.1021/ja904808n.Peer-Reviewed Original ResearchConceptsPELDOR dataElectron-electron double resonance measurementsTransverse spin relaxation timeProbe frequencySpin relaxation timeDouble resonance measurementsChannel KcsAMagnetic field strengthSpin-label distancesCentral channel axisPELDOR experimentsDetergent-solubilized samplesField strengthRelaxation timeOscillation frequencyResonance determinationQuantitative simulationChannel axisKcsAFrequencyOrientationMeasurementsAngle