2007
Fluorescence of 2-aminopurine reveals rapid conformational changes in the RB69 DNA polymerase-primer/template complexes upon binding and incorporation of matched deoxynucleoside triphosphates
Zhang H, Cao W, Zakharova E, Konigsberg W, De La Cruz EM. Fluorescence of 2-aminopurine reveals rapid conformational changes in the RB69 DNA polymerase-primer/template complexes upon binding and incorporation of matched deoxynucleoside triphosphates. Nucleic Acids Research 2007, 35: 6052-6062. PMID: 17766250, PMCID: PMC2094073, DOI: 10.1093/nar/gkm587.Peer-Reviewed Original ResearchConceptsHydroxyl groupsNucleotidyl transfer reactionMinimal kinetic schemeConformational changesDetectable fluorescence changeChemical quenchTransfer reactionsDependent fluorescence enhancementFluorescence enhancementFluorescence quenchingFluorescent probeRapid conformational changesTemplate complexN-positionRate constantsFluorescence changesRapid fluorescenceTernary complexKinetic schemeComplexesTemplating baseDependent conformational changesDp/TTemplateFluorescence
2005
Thymosin β4 Induces a Conformational Change in Actin Monomers
Dedova IV, Nikolaeva OP, Safer D, De La Cruz EM, dos Remedios CG. Thymosin β4 Induces a Conformational Change in Actin Monomers. Biophysical Journal 2005, 90: 985-992. PMID: 16272441, PMCID: PMC1367123, DOI: 10.1529/biophysj.105.063081.Peer-Reviewed Original ResearchAcrylamideActinsAdenosine TriphosphateAnimalsCalorimetry, Differential ScanningCysteineElectrophoresis, Polyacrylamide GelFluorescence Resonance Energy TransferHot TemperatureKineticsLysineModels, MolecularMolecular ConformationNucleotidesProtein BindingProtein ConformationProtein Structure, TertiaryPurinesRabbitsSolventsSpectrometry, FluorescenceTemperatureThymosin
2004
Cofilin Binding to Muscle and Non-muscle Actin Filaments: Isoform-dependent Cooperative Interactions
De La Cruz EM. Cofilin Binding to Muscle and Non-muscle Actin Filaments: Isoform-dependent Cooperative Interactions. Journal Of Molecular Biology 2004, 346: 557-564. PMID: 15670604, DOI: 10.1016/j.jmb.2004.11.065.Peer-Reviewed Original ResearchConceptsActin filamentsConcentration of cofilinActin isoformsFilament severingRegulatory proteinsCooperative free energyActin fluorescencePyrene-actin fluorescenceCofilinFilament bindingHuman cofilinEquilibrium bindingCooperative interactionsIntrinsic affinitySkeletal muscleIsoformsBindingFilamentsSeveringMuscle actinHill coefficientCooperativity modelFilament latticeIsolated siteProtein
2002
Kinetic Characterization of the Weak Binding States of Myosin V †
Yengo CM, De La Cruz EM, Safer D, Ostap EM, Sweeney HL. Kinetic Characterization of the Weak Binding States of Myosin V †. Biochemistry 2002, 41: 8508-8517. PMID: 12081502, DOI: 10.1021/bi015969u.Peer-Reviewed Original Research
2001
Kinetic Mechanism and Regulation of Myosin VI*
De La Cruz E, Ostap E, Sweeney H. Kinetic Mechanism and Regulation of Myosin VI*. Journal Of Biological Chemistry 2001, 276: 32373-32381. PMID: 11423557, DOI: 10.1074/jbc.m104136200.Peer-Reviewed Original ResearchConceptsHeavy chain phosphorylationMyosin VIPhysiological nucleotide concentrationsADP releaseHigh duty ratio motorMolecular basisUnique adaptationsActin filamentsATP bindsATPase cycleNative dimerRate-limiting stepDetailed kinetic analysisChain phosphorylationRegulationNucleotide concentrationsDiffusional encounterMyosinLow affinityMutantsProcessivityKinetic analysisPhosphorylationActinBinds
2000
Actin and Light Chain Isoform Dependence of Myosin V Kinetics †
De La Cruz E, Wells A, Sweeney H, Ostap E. Actin and Light Chain Isoform Dependence of Myosin V Kinetics †. Biochemistry 2000, 39: 14196-14202. PMID: 11087368, DOI: 10.1021/bi001701b.Peer-Reviewed Original Research
1998
Interactions of Acanthamoeba Profilin with Actin and Nucleotides Bound to Actin †
Vinson V, De La Cruz E, Higgs H, Pollard T. Interactions of Acanthamoeba Profilin with Actin and Nucleotides Bound to Actin †. Biochemistry 1998, 37: 10871-10880. PMID: 9692980, DOI: 10.1021/bi980093l.Peer-Reviewed Original ResearchConceptsMg-ATPAcanthamoeba profilinMg-ADPExchange of ADPRabbit skeletal muscle actinAffinity of profilinSkeletal muscle actinFree barbed endsProfilin bindingSerine 38Nucleotide exchangeBarbed endsCysteine 374Actin monomersProfilinMuscle actinActinUnique siteIntrinsic fluorescenceFluorescence anisotropyATP-actinSubunit/Free actinSame affinityATP