9,302 results found
    1. Neuroscience

    Spatiotemporal dynamics of multi-vesicular release is determined by heterogeneity of release sites within central synapses

    Dario Maschi, Vitaly A Klyachko
    Release site heterogeneity represents a previously unknown level of structural and functional organization within individual active zones in central synapses, which determines the spatiotemporal dynamics of multi-vesicular release.
    1. Neuroscience

    Variability in the Munc13-1 content of excitatory release sites

    Maria Rita Karlocai et al.
    Different numbers of Munc13-1 molecules build up the specialized regions of the presynaptic plasma membrane called the release sites.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Cryo-EM visualization of the ribosome in termination complex with apo-RF3 and RF1

    Jesper Pallesen et al.
    Cryo-electron microscopy has been used to provide a structural interpretation of the complete action cycle of release factor 3 during translation termination, which includes a coordinated sequence of interactions with a class-I release factor and the ribosome.
    1. Chromosomes and Gene Expression

    An efficient targeted nuclease strategy for high-resolution mapping of DNA binding sites

    Peter J Skene, Steven Henikoff
    CUT&RUN (Cleavage Under Targets & Release Using Nuclease) profiles antibody-targeted DNA-binding proteins in situ with high resolution and low background, providing a simple, robust and scalable alternative to chromatin immunoprecipitation.
    1. Neuroscience

    Rapid regulation of vesicle priming explains synaptic facilitation despite heterogeneous vesicle:Ca2+ channel distances

    Janus RL Kobbersmed et al.
    Heterogeneous distances between vesicles and Ca2+-channels make synapses prone to short-term depression, however, Ca2+-dependent increases in the number of release-ready vesicles supports facilitation even with broadly distributed vesicle:Ca2+-channel distances.
    1. Neuroscience

    Incomplete vesicular docking limits synaptic strength under high release probability conditions

    Gerardo Malagon et al.
    The probability of occupancy of individual synaptic release sites at rest sets an upper limit to synaptic output when increasing action potential related calcium entry.
    1. Neuroscience

    Human pyramidal to interneuron synapses are mediated by multi-vesicular release and multiple docked vesicles

    Gábor Molnár et al.
    The compactness of synaptic release sites coupled with their four-fold number in humans compared to rats provides unprecedented scaleability in operation of human synapses.
    1. Computational and Systems Biology

    CDK9-dependent RNA polymerase II pausing controls transcription initiation

    Saskia Gressel et al.
    CDK9 inhibition in human cells uncovers that Pol II pause duration regulates the frequency of productive transcription initiation.
    1. Neuroscience

    Myosin V functions as a vesicle tether at the plasma membrane to control neurotransmitter release in central synapses

    Dario Maschi et al.
    Synaptic vesicles undergo reversible tethering at the plasma membrane which is activity- and myosin V- dependent.
    1. Biochemistry and Chemical Biology
    2. Evolutionary Biology

    Reverse evolution leads to genotypic incompatibility despite functional and active site convergence

    Miriam Kaltenbach et al.
    Enzyme evolution is reversible on a structural and functional (phenotypic) level, but through a different mutational pathway that leads to genotypic incompatibility with the ancestor.

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