169 results found
    1. Cell Biology
    2. Physics of Living Systems

    Centering and symmetry breaking in confined contracting actomyosin networks

    Niv Ierushalmi et al.
    Novel mechanisms for cellular centering and symmetry breaking involving persistent contractile actomyosin flows and their hydrodynamic interactions with the fluid cytosol are presented and studied using a minimal, reconstituted system.
    1. Cell Biology

    A novel checkpoint pathway controls actomyosin ring constriction trigger in fission yeast

    Tomás Edreira et al.
    In fission yeast cell wall stress triggers a cytokinesis blockage specifically in the onset of actomyosin ring constriction.
    1. Physics of Living Systems

    Controlling contractile instabilities in the actomyosin cortex

    Masatoshi Nishikawa et al.
    Combining quantitative biological experiment and physical description of actomyosin cortex reveals a contractile instability in the cortex of C. elegans embryo, and its biochemical control in order to robustly drive morphogenetic events.
    1. Cell Biology

    Curvature-induced expulsion of actomyosin bundles during cytokinetic ring contraction

    Junqi Huang et al.
    Cytokinetic actomyosin ring disassembly occurs through a novel mechanism in which the increased ring curvature, generated through contraction, itself promotes the disassembly process.
    1. Cell Biology

    Generation of contractile actomyosin bundles depends on mechanosensitive actin filament assembly and disassembly

    Sari Tojkander et al.
    Mechanosensitive inhibition of actin polymerization through VASP phosphorylation is required for stress fiber maturation and alignment.
    1. Cell Biology

    Cytokinesis in vertebrate cells initiates by contraction of an equatorial actomyosin network composed of randomly oriented filaments

    Felix Spira et al.
    Asymmetric tension increase along the cell equator promotes self-organization of actomyosin into a partially aligned network during cytokinetic cleavage furrow ingression of vertebrate cells.
    1. Cell Biology
    2. Developmental Biology

    Shear-induced damped oscillations in an epithelium depend on actomyosin contraction and E-cadherin cell adhesion

    Ehsan Sadeghipour et al.
    Cell movement toward and away from the midline of an epithelium over tens of hours are caused by spontaneous or externally-applied shear forces to eliminate force imbalances within the tissue.
    1. Biochemistry and Chemical Biology

    Control of lipid domain organization by a biomimetic contractile actomyosin cortex

    Sven Kenjiro Vogel et al.
    Building on previous work (Vogel et al., 2013b), it is shown that myosin-driven actin filament rearrangements actively move, split or fuse individual lipid domains and change their overall shape.
    1. Cell Biology
    2. Neuroscience

    The membrane periodic skeleton is an actomyosin network that regulates axonal diameter and conduction

    Ana Rita Costa et al.
    The axonal cytoskeletal contains an actomyosin-II network that controls circumferential axonal contraction and expansion with the potential of regulating fluctuations in diameter during action potential firing, trafficking, and degeneration.
    1. Physics of Living Systems

    Reversal of contractility as a signature of self-organization in cytoskeletal bundles

    Martin Lenz
    Quantitative, experimentally testable predictions allow discrimination between contraction mechanisms in disordered actomyosin and microtubule/motor bundles.

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