23 results found
    1. Neuroscience

    Nanodomain coupling explains Ca2+ independence of transmitter release time course at a fast central synapse

    Itaru Arai, Peter Jonas
    Ca2+ channels and release sensors at a fast central synapse are tightly coupled, which minimizes the effect of extracellular Ca2+ concentration on the timing of transmitter release.
    1. Structural Biology and Molecular Biophysics
    2. Neuroscience

    A novel region in the CaV2.1 α1 subunit C-terminus regulates fast synaptic vesicle fusion and vesicle docking at the mammalian presynaptic active zone

    Matthias Lübbert et al.
    A novel region in the CaV2.1 α1 subunit regulates coupling of synaptic vesicles to CaV2.1 calcium channels, synaptic vesicle release and docking, and the size of the fast and total releasable pools of synaptic vesicles.
    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. Cell Biology

    Stable Pom1 clusters form a glucose-modulated concentration gradient that regulates mitotic entry

    Corey A H Allard et al.
    Dynamic signaling protein clusters sample and map the cell surface to ensure that cells divide at the proper size.
    1. Cell Biology

    Mitochondrial flashes regulate ATP homeostasis in the heart

    Xianhua Wang et al.
    Mitochondrial flashes counteract the imbalance of ATP supply-and-demand and constitute an auto-regulator of ATP homeostasis in the heart.
    1. Neuroscience

    Ca2+ sensor synaptotagmin-1 mediates exocytosis in mammalian photoreceptors

    Justin J Grassmeyer et al.
    The vesicular Ca2+ sensor synaptotagmin-1 regulates both fast phasic and slow tonic glutamate release at ribbon synapses of rod and cone photoreceptor cells.
    1. Neuroscience

    The presynaptic ribbon maintains vesicle populations at the hair cell afferent fiber synapse

    Lars Becker et al.
    The auditory hair cell synaptic ribbon maintains vesicle pools near release sites in order to support sustained and timed vesicle release.
    1. Structural Biology and Molecular Biophysics

    Proximal clustering between BK and CaV1.3 channels promotes functional coupling and BK channel activation at low voltage

    Oscar Vivas et al.
    Super-resolution imaging reveals a novel multi-channel arrangement that explains how big potassium (BK) channel activation closely tracks the opening of low-voltage-activated L-type calcium channels.
    1. Neuroscience

    Synchronous and asynchronous modes of synaptic transmission utilize different calcium sources

    Hua Wen et al.
    The delayed-onset of asynchronous transmitter release seen in neurons that fire repeatedly is triggered by a different source of calcium from that which triggers synchronous transmitter release.
    1. Cell Biology
    2. Neuroscience

    The synaptic ribbon is critical for sound encoding at high rates and with temporal precision

    Philippe Jean et al.
    The synaptic ribbon regulates calcium channel clustering and proper vesicle dynamics at cochlear inner hair cells to ensure precise sound encoding.

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