2024
Minimal presynaptic protein machinery governing diverse kinetics of calcium-evoked neurotransmitter release
Bose D, Bera M, Norman C, Timofeeva Y, Volynski K, Krishnakumar S. Minimal presynaptic protein machinery governing diverse kinetics of calcium-evoked neurotransmitter release. Nature Communications 2024, 15: 10741. PMID: 39738049, PMCID: PMC11685451, DOI: 10.1038/s41467-024-54960-1.Peer-Reviewed Original ResearchConceptsSynaptotagmin-7Synaptotagmin-1Protein machinerySNARE complex assemblyFusion clampExocytosis processVesicle fusionVesicular fusionComplex assemblySynaptic vesiclesFusion assayMolecular basisPhysiologically relevant conditionsPresynaptic calcium influxNeurotransmitter releaseVesiclesSNAREProteinMachineryCompetitive bindingFusion dynamicsComplexinExocytosisFusionCalcium influx
2023
Roles for diacylglycerol in synaptic vesicle priming and release revealed by complete reconstitution of core protein machinery
Sundaram R, Chatterjee A, Bera M, Grushin K, Panda A, Li F, Coleman J, Lee S, Ramakrishnan S, Ernst A, Gupta K, Rothman J, Krishnakumar S. Roles for diacylglycerol in synaptic vesicle priming and release revealed by complete reconstitution of core protein machinery. Proceedings Of The National Academy Of Sciences Of The United States Of America 2023, 120: e2309516120. PMID: 37590407, PMCID: PMC10450444, DOI: 10.1073/pnas.2309516120.Peer-Reviewed Original ResearchConceptsCore protein machineryRelease-ready vesiclesSynaptic vesicle primingVesicle primingProtein machinerySingle-molecule imagingSNAREpin assemblyFunctional intermediatesFunctional reconstitutionMunc13DiacylglycerolCoordinated actionMunc18VesiclesMachineryComplete reconstitutionNew roleSelective effectDetailed characterizationChaperonesRate of caReconstitutionVAMP2ComplexinMutations
2019
Symmetrical organization of proteins under docked synaptic vesicles
Li X, Radhakrishnan A, Grushin K, Kasula R, Chaudhuri A, Gomathinayagam S, Krishnakumar SS, Liu J, Rothman JE. Symmetrical organization of proteins under docked synaptic vesicles. FEBS Letters 2019, 593: 144-153. PMID: 30561792, PMCID: PMC6353562, DOI: 10.1002/1873-3468.13316.Peer-Reviewed Original ResearchConceptsCryo-electron tomography analysisSymmetrical organizationCalcium-regulated exocytosisMunc18 proteinsProtein machineryFusion machinerySingle SNAREpinCircular oligomersMutational analysisRadial positioningSynaptic vesiclesRelease machineryMachinerySynaptotagminProteinRing hypothesisVesiclesObserved arrangementUnderlying mechanismSNAREpinsComplexinNerve growthExocytosisGrowth
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