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    1. Neuroscience
    2. Physics of Living Systems

    The neuronal calcium sensor Synaptotagmin-1 and SNARE proteins cooperate to dilate fusion pores

    Zhenyong Wu, Nadiv Dharan ... Erdem Karatekin
    During neurotransmitter release, calcium-induced membrane insertion of the C2B domain of Synaptotagmin re-orients the bound SNARE complex which dilates the fusion pore in a mechanical lever action.
    1. Neuroscience
    2. Structural Biology and Molecular Biophysics

    Ring-like oligomers of Synaptotagmins and related C2 domain proteins

    Maria N Zanetti, Oscar D Bello ... Shyam S Krishnakumar
    A model for synchronous neurotransmitter release suggests that when not in the presence of calcium ions, Synaptotagmin proteins form ring-like structures between the vesicle and plasma membrane that prevent spontaneous fusion.
    1. Cell Biology
    2. Neuroscience

    Synaptotagmin-1 is the Ca2+ sensor for fast striatal dopamine release

    Aditi Banerjee, Jinoh Lee ... Pascal S Kaeser
    Genetic and electrophysiological analyses reveal calcium-triggering mechanisms for dopamine release in the striatum that may enable fast and slow dopamine coding.
    1. Structural Biology and Molecular Biophysics

    Advances in X-ray free electron laser (XFEL) diffraction data processing applied to the crystal structure of the synaptotagmin-1 / SNARE complex

    Artem Y Lyubimov, Monarin Uervirojnangkoorn ... Axel T Brunger
    Building on previous work (Uervirojnangkoorn et al., 2015), we demonstrate how improved methods for processing XFEL diffraction data enable the determination of structures from poorly diffracting crystals.
    1. Structural Biology and Molecular Biophysics

    Complexin inhibits spontaneous release and synchronizes Ca2+-triggered synaptic vesicle fusion by distinct mechanisms

    Ying Lai, Jiajie Diao ... Axel T Brunger
    Building on previous work (Diao et al., 2012), we show that the mechanism by which complexin suppresses spontaneous fusion is distinct from the mechanism by which it synchronizes Ca2+-triggered fusion.
    1. Structural Biology and Molecular Biophysics
    2. Neuroscience

    Synaptic proteins promote calcium-triggered fast transition from point contact to full fusion

    Jiajie Diao, Patricia Grob ... Axel T Brunger
    A combination of advanced optical imaging and cryogenic electron microscopy has been used to explore membrane fusion in a synthetic system and provide new insights into neurotransmitter release.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    Single-molecule force spectroscopy of protein-membrane interactions

    Lu Ma, Yiying Cai ... Yongli Zhang
    A high-resolution method to quantify interactions between lipid bilayers and single proteins under controlled load is presented and applied to key proteins involved in membrane fusion and formation and maintenance of membrane contact sites.
    1. Structural Biology and Molecular Biophysics

    All-atom molecular dynamics simulations of Synaptotagmin-SNARE-complexin complexes bridging a vesicle and a flat lipid bilayer

    Josep Rizo, Levent Sari ... Milo M Lin
    Novel insights into the molecular mechanisms underlying neurotransmitter release are provided by all-atom molecular dynamics simulations including SNARE proteins, synaptotagmin-1, complexin-1, a vesicle and a flat bilayer.
    1. Cell Biology
    2. Neuroscience

    Multiple factors maintain assembled trans-SNARE complexes in the presence of NSF and αSNAP

    Eric A Prinslow, Karolina P Stepien ... Josep Rizo
    Biophysical analyses indicate that Munc18-1, Munc13-1, synaptotagmin-1 and complexin-1 maintain assembled trans-SNARE complexes in the presence of NSF-alphaSNAP, suggesting that they form part of the primed state of synaptic vesicles.
    1. Cell Biology
    2. Neuroscience

    AP2 hemicomplexes contribute independently to synaptic vesicle endocytosis

    Mingyu Gu, Qiang Liu ... Erik M Jorgensen
    A protein complex that enables cells to transport substances across their membranes, and that typically consists of four subunits, can also function as two hemicomplexes, each with two subunits.