2016
Structural Basis for the Procofactor to Cofactor Transition in Human Factor V
Kumar S, Deng W, Stayrook S, Li R, Camire R, Krishnaswamy S. Structural Basis for the Procofactor to Cofactor Transition in Human Factor V. Blood 2016, 128: 253. DOI: 10.1182/blood.v128.22.253.253.Peer-Reviewed Original ResearchBasic regionB domainC-terminusLong standing puzzleBR bindingCrystal structureDocking studiesBr fragmentsHuman factor VCentral B domainA2 domainAmide proton exchange ratesPhosphatidylserine-containing membranesAr2Hydrogen-deuterium exchangeA1-A2-B-A3-C1-C2Adjacent regionsAmide proton exchangeComputational docking studiesProton exchange ratesDomain organizationAcid sequenceProteolytic excisionCofactor formationPrimary structure
2015
The X-Ray Structure of a Variant of Human Factor V Provides Structural Insights into the Procofactor Activation Paradox
Kumar S, Stayrook S, Camire R, Krishnaswamy S. The X-Ray Structure of a Variant of Human Factor V Provides Structural Insights into the Procofactor Activation Paradox. Blood 2015, 126: 121. DOI: 10.1182/blood.v126.23.121.121.Peer-Reviewed Original ResearchB domainAcid regionC-terminusCofactor functionBR bindingDiffraction quality crystalsCoagulation factor VA3 domainFactor VaCofactor activityHomologous A domainsA1-A2-B-A3-C1-C2Ca2+-dependent fashionDomain organizationMolecular replacementAcid sequenceXa bindingSingle chain antibodyPrimary sequenceProteolytic excisionDevelopment of novel strategiesBind calcium ionsProteolytic processingProteolytic cleavageStructure-based model
2014
X-Ray Structure of an Anticoagulant RNA Aptamer Bound to Factor Xa. Structural Basis for Its Ability to Disrupt Interactions Between Xa and Va within Prothrombinase
Kumar S, Sullenger B, Stayrook S, Krishnaswamy S. X-Ray Structure of an Anticoagulant RNA Aptamer Bound to Factor Xa. Structural Basis for Its Ability to Disrupt Interactions Between Xa and Va within Prothrombinase. Blood 2014, 124: 4232. DOI: 10.1182/blood.v124.21.4232.4232.Peer-Reviewed Original ResearchRNA aptamersC-terminusBinding to factor VIIIaIntrinsic XaseBase-paired stemActive site functionAssembly of prothrombinaseFactor Xa and factor VaSELEX screeningMolecular replacementInteracting proteinsProteinase domainFunctional characterizationAptamer bindingCatalytic Ser195Disrupt interactionsA-resolutionFactor XaHeparin bindingStructural basisAutolysis loopNucleotideInteracting speciesNucleotide basesSolvent accessible surface area