11 results found
    1. Cell Biology

    CYK-4 functions independently of its centralspindlin partner ZEN-4 to cellularize oocytes in germline syncytia

    Kian-Yong Lee et al.
    The CYK-4 subunit of the broadly conserved intercellular bridge component centralspindlin, but not its ZEN-4 subunit, is essential for the cytokinesis-like closure of intercellular bridges that cellularizes oocytes to separate them from germline syncytia.
    1. Cell Biology

    The RhoGAP activity of CYK-4/MgcRacGAP functions non-canonically by promoting RhoA activation during cytokinesis

    Donglei Zhang, Michael Glotzer
    Activation of the key regulator of cytokinesis, RhoA, involves an unexpected contribution by a RhoGAP domain.
    1. Cell Biology

    Microtubule plus-ends act as physical signaling hubs to activate RhoA during cytokinesis

    Vikash Verma, Thomas J Maresca
    MT plus-end-mediated recruitment of a cortical pool of ECT2 trigger RhoA activation upon contact, which results in localized contractility during cytokinesis.
    1. Cell Biology
    2. Neuroscience

    Ser/Thr kinase Trc controls neurite outgrowth in Drosophila by modulating microtubule-microtubule sliding

    Rosalind Norkett et al.
    Microtubule-microtubule sliding and neurite outgrowth in Drosophila is controlled by a Ser/Thr kinase Tricornered via phosphorylation of a 'mitotic' motor protein Pavarotti.
    1. Cell Biology

    Male meiotic spindle features that efficiently segregate paired and lagging chromosomes

    Gunar Fabig et al.
    Chromosome segregation in male spermatocytes exhibits anaphase A without shortening of autosome-associated microtubules and partitioning of an unpaired X chromosome that is initiated by an imbalance of attached kinetochore microtubules.
    1. Physics of Living Systems
    2. Cell Biology

    Cortical flow aligns actin filaments to form a furrow

    Anne-Cecile Reymann et al.
    Compressing the actomyosin network by cortical flow causes filaments to align and form a constricting ring.
    1. Cell Biology
    2. Computational and Systems Biology

    A positive-feedback-based mechanism for constriction rate acceleration during cytokinesis in Caenorhabditis elegans

    Renat N Khaliullin et al.
    Positive feedback between contractile ring myosin and compression-driven cortical flow can explain the exponential accumulation of contractile ring components and constriction rate acceleration that ensures timely cell separation during cytokinesis.
    1. Cell Biology
    2. Physics of Living Systems

    Co-movement of astral microtubules, organelles and F-actin by dynein and actomyosin forces in frog egg cytoplasm

    James F Pelletier et al.
    Live imaging of multiple cytoplasmic networks in frog egg extracts calls for new models for how egg cytoplasm is physically organized during cleavage divisions.
    1. Structural Biology and Molecular Biophysics

    The divergent mitotic kinesin MKLP2 exhibits atypical structure and mechanochemistry

    Joseph Atherton et al.
    MKLP2 is a divergent molecular motor that has structurally evolved to bind its microtubule track and use the energy of ATP in distinct ways, tuned according to its function in cell division.
    1. Structural Biology and Molecular Biophysics

    Geometry of antiparallel microtubule bundles regulates relative sliding and stalling by PRC1 and Kif4A

    Sithara Wijeratne, Radhika Subramanian
    Geometrical features of microtubule arrays regulate the collective activity of motor and non-motor proteins.

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