2023
Synaptophysin chaperones the assembly of 12 SNAREpins under each ready-release vesicle
Bera M, Radhakrishnan A, Coleman J, Sundaram R, Ramakrishnan S, Pincet F, Rothman J. Synaptophysin chaperones the assembly of 12 SNAREpins under each ready-release vesicle. Proceedings Of The National Academy Of Sciences Of The United States Of America 2023, 120: e2311484120. PMID: 37903271, PMCID: PMC10636311, DOI: 10.1073/pnas.2311484120.Peer-Reviewed Original ResearchConceptsSpecific molecular functionsSynaptic vesicle protein synaptophysinTarget membrane bilayerSensor synaptotagminSNARE proteinsMolecular functionsMembrane proteinsSNAREpinsReceptor vesiclesSingle-molecule measurementsGene knockoutMembrane bilayerLipid bilayersProtein synaptophysinVesiclesDetergent extractsHexamer structureSYPMechanism of actionProteinAssemblyChaperonesSynaptotagminExocytosisBilayers
2021
Vesicle capture by membrane‐bound Munc13‐1 requires self‐assembly into discrete clusters
Li F, Sundaram R, Gatta AT, Coleman J, Ramakrishnan S, Krishnakumar SS, Pincet F, Rothman JE. Vesicle capture by membrane‐bound Munc13‐1 requires self‐assembly into discrete clusters. FEBS Letters 2021, 595: 2185-2196. PMID: 34227103, DOI: 10.1002/1873-3468.14157.Peer-Reviewed Original ResearchConceptsMunc13-1Vesicle captureSpecific plasma membrane domainsStep-wise photobleachingC-domainMunc13-1 proteinPlasma membrane domainsSynaptic vesicle dockingC-terminal CVesicle dockingMembrane domainsTIRF microscopySoluble proteinVesicle membraneActive zoneMultiple copiesSynaptic vesiclesFunctional significanceSmall unilamellar vesiclesLipid bilayersVesiclesUnilamellar vesiclesProteinDiscrete clustersCopiesNascent fusion pore opening monitored at single-SNAREpin resolution
Heo P, Coleman J, Fleury JB, Rothman JE, Pincet F. Nascent fusion pore opening monitored at single-SNAREpin resolution. Proceedings Of The National Academy Of Sciences Of The United States Of America 2021, 118: e2024922118. PMID: 33495324, PMCID: PMC7865171, DOI: 10.1073/pnas.2024922118.Peer-Reviewed Original ResearchConceptsFusion poreFusion pore openingTransient fusion poresSingle fusion eventFast neurotransmitter releaseSingle SNAREpinAsymmetric lipid bilayerProtein complexesSNAREpinsTarget membraneFusion eventsCellular traffickingVesicle fusionSmall vesiclesIon channelsLipid bilayersCargo transportKey eventsEnergy landscapePore openingNeurotransmitter releaseDiscrete sizesVesiclesSynaptic transmissionCargo release
2018
High-Throughput Monitoring of Single Vesicle Fusion Using Freestanding Membranes and Automated Analysis
Ramakrishnan S, Gohlke A, Li F, Coleman J, Xu W, Rothman JE, Pincet F. High-Throughput Monitoring of Single Vesicle Fusion Using Freestanding Membranes and Automated Analysis. Langmuir 2018, 34: 5849-5859. PMID: 29694054, DOI: 10.1021/acs.langmuir.8b00116.Peer-Reviewed Original ResearchConceptsMembrane fusionFusion eventsSoluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) proteinsSNARE-dependent membrane fusionIndividual vesicle fusion eventsFactor attachment protein receptor proteinsN-ethylmaleimide-sensitive factor attachment protein receptor proteinsT-SNARE proteinsSingle-vesicle fusionProtein receptor proteinsVesicle fusion eventsMobility of proteinsVesicle dockingContent releaseVesicle fusionHigh-throughput monitoringPlanar membranesReceptor proteinLipid mixingProteinLipid bilayersVesiclesCorrect reconstitutionMembraneAqueous compartmentStructural Insight into the Interaction of Synaptotagmin-1 and Snare Complex on Lipid Bilayer by Cryo-Electron Microscopy
Grushin K, Wang J, Coleman J, Rothman J, Sindelar C, Krishnakumar S. Structural Insight into the Interaction of Synaptotagmin-1 and Snare Complex on Lipid Bilayer by Cryo-Electron Microscopy. Biophysical Journal 2018, 114: 282a. DOI: 10.1016/j.bpj.2017.11.1622.Peer-Reviewed Original Research