101 results found
    1. Neuroscience

    v-SNARE transmembrane domains function as catalysts for vesicle fusion

    Madhurima Dhara et al.
    Structural flexibility of the synaptobrevin-2 transmembrane domain promotes membrane fusion.
    1. Structural Biology and Molecular Biophysics
    2. Neuroscience

    Native α-synuclein induces clustering of synaptic-vesicle mimics via binding to phospholipids and synaptobrevin-2/VAMP2

    Jiajie Diao et al.
    Experiments on synthetic models of synaptic vesicles have shed new light on the role of the protein α-synuclein in the central nervous system.
    1. Structural Biology and Molecular Biophysics
    2. Neuroscience

    Autoinhibition of Munc18-1 modulates synaptobrevin binding and helps to enable Munc13-dependent regulation of membrane fusion

    Ewa Sitarska et al.
    Biophysical and functional data strongly support the notion that Munc18-1 acts as a template to assemble the neuronal SNARE complex, and that inhibition of this activity underlies diverse forms of regulation of neurotransmitter release.
    1. Neuroscience

    Synergistic actions of v-SNARE transmembrane domains and membrane-curvature modifying lipids in neurotransmitter release

    Madhurima Dhara et al.
    Naturally-occurring v-SNARE TMD variants differentially regulate fusion pore dynamics and cooperate with phospholipids in supporting membrane curvature at the fusion pore neck.
    1. Structural Biology and Molecular Biophysics
    2. Neuroscience

    Reconciling isothermal titration calorimetry analyses of interactions between complexin and truncated SNARE complexes

    Eric A Prinslow et al.
    Isothermal titration calorimetry experiments clarify apparently discrepant results described previously and show that N-terminal sequences of complexin bind to SNARE complexes containing C-terminally truncated synaptobrevin when they include the syntaxin-1 juxtamembrane region.
    1. Developmental Biology
    2. Neuroscience

    The laminar organization of the Drosophila ellipsoid body is semaphorin-dependent and prevents the formation of ectopic synaptic connections

    Xiaojun Xie et al.
    The organization of layered/laminated axon projections in specific regions of the fruitfly central brain is regulated by short-range repulsive guidance and is critical for local inhibitory circuit formation and function.
    1. Neuroscience

    Doc2B acts as a calcium sensor for vesicle priming requiring synaptotagmin-1, Munc13-2 and SNAREs

    Sébastien Houy et al.
    Doc2B functions in two distinct vesicle priming steps; membrane localization occludes upstream Ca2+-dependent priming, whereas Ca2+-binding and interaction with synaptotagmin-1, SNAREs, and Munc13-2 are involved in downstream priming, which makes vesicles readily releasable.
    1. Developmental Biology

    Antagonistic regulation by insulin-like peptide and activin ensures the elaboration of appropriate dendritic field sizes of amacrine neurons

    Jiangnan Luo et al.
    Afferent-derived factors control the elaboration of appropriate and robust sizes of dendritic arbors by dynamically modulating dendritic growth parameters.
    1. Neuroscience

    Imaging neuropeptide release at synapses with a genetically engineered reporter

    Keke Ding et al.
    A series of genetically-encoded fluorescent reporters that allow imaging of neuropeptide release in vivo, with sub-second temporal and nerve terminal-level spatial resolution are developed.
    1. Neuroscience

    Elevated synaptic vesicle release probability in synaptophysin/gyrin family quadruple knockouts

    Mathan K Raja et al.
    Synaptophysins and gyrins dampen synaptic strength selectively at low frequencies, hinting that synaptic transmission may play a frequency filtering role in biological computation that is more general than currently envisioned.

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