6,299 results found
    1. Cell Biology

    Dynein–Dynactin–NuMA clusters generate cortical spindle-pulling forces as a multi-arm ensemble

    Masako Okumura et al.
    Optogenetic reconstitution reveals core functional modules and architecture of the cortical force-generating machinery in human cells.
    1. Biochemistry and Chemical Biology
    2. Physics of Living Systems

    Direct measurement of the mechanical work during translocation by the ribosome

    Tingting Liu et al.
    ‘Optical tweezers’ measurements of single ribosomes and single mRNA molecules show that the translation rate depends exponentially on the applied force, and suggests that the ribosome functions as a Brownian ratchet.
    1. Cell Biology
    2. Physics of Living Systems

    Stoichiometric interactions explain spindle dynamics and scaling across 100 million years of nematode evolution

    Reza Farhadifar et al.
    Stoichiometric interactions between microtubules and cortical force-generators set spindle size, position and dynamics, and its scaling with cell size in nematode species.
    1. Neuroscience

    Murine Fam65b forms ring-like structures at the base of stereocilia critical for mechanosensory hair cell function

    Bo Zhao et al.
    Super-resolution microscopy reveals a highly organized compartment in the stereocilia of mechanosensory hair cells of the inner ear, which is critical for hair cell function and affected in disease.
    1. Cell Biology
    2. Structural Biology and Molecular Biophysics

    Neck linker docking is critical for Kinesin-1 force generation in cells but at a cost to motor speed and processivity

    Breane G Budaitis et al.
    Force generation by kinesin motor proteins requires formation of both a 2-stranded cover-neck bundle and an asparagine-based latch for transport of membrane-bound cargoes in cells.
    1. Computational and Systems Biology

    Spatiotemporal establishment of dense bacterial colonies growing on hard agar

    Mya R Warren et al.
    A 3D model captures the growth and expansion dynamics of bacterial colonies, revealing distinct effects of surface tension, mechanical forces, and nutrients on the speed of radial and vertical expansion.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    Assembly and positioning of actomyosin rings by contractility and planar cell polarity

    Ivonne M Sehring et al.
    Contractility wins over the polarity pathway in a tug-of-war to position a cytokinesis-like actomyosin ring at the equator of notochord cells.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    The Caenorhabditis elegans protein SAS-5 forms large oligomeric assemblies critical for centriole formation

    Kacper B Rogala et al.
    SAS-5 forms oligomers, through a trimeric coiled coil and novel dimeric domain, that are necessary for centriolar localisation of SAS-5 and for centriole duplication.
    1. Chromosomes and Gene Expression
    2. Structural Biology and Molecular Biophysics

    ParB dynamics and the critical role of the CTD in DNA condensation unveiled by combined force-fluorescence measurements

    Julene Madariaga-Marcos et al.
    A single-molecule biophysical approach reveals that the C-terminal domain of ParB blocks ParB network formation by heterodimerization with the full-length protein, which remains bound to the DNA.
    1. Neuroscience

    Cortical signatures of precision grip force control in children, adolescents, and adults

    Mikkel Malling Beck et al.
    Precise motor control is supported by connectivity within a cortical grasping network from childhood to adulthood, but older individuals display more top-down control and superior motor performance compared to children.

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