153 results found
    1. Physics of Living Systems
    2. Structural Biology and Molecular Biophysics

    Conformational changes in twitchin kinase in vivo revealed by FRET imaging of freely moving C. elegans

    Daniel Porto et al.
    Quantitative FRET imaging in moving C. elegans shows that stretch-unfolding of twitchin kinase occurs in the active muscle, whereby mechanical activity titrates the signaling pathway of this cytoskeletal kinase.
    1. Cell Biology
    2. Physics of Living Systems

    Autonomous clocks that regulate organelle biogenesis, cytoskeletal organization, and intracellular dynamics

    Mohammad Mofatteh et al.
    Latest advances in biological timing studies substantiate an emerging concept of autonomous clocks that are normally entrained by the cell cycle and/or the circadian clock to run in synchrony, but have evolved to run independently to regulate different cellular events.
    1. Physics of Living Systems

    Condensation tendency and planar isotropic actin gradient induce radial alignment in confined monolayers

    Tianfa Xie et al.
    Radial alignment in confined cell monolayers with isotropic actin network is found to be mediated by the condensation tendency and tissue-scale actin gradient.
    1. Developmental Biology

    Apical contacts stemming from incomplete delamination guide progenitor cell allocation through a dragging mechanism

    Eduardo Pulgar et al.
    Incomplete delamination serves as a cellular platform for coordinated tissue movements during development, guiding newly formed progenitor cell groups to the differentiation site.
    1. Cell Biology
    2. Physics of Living Systems

    Emergence of a smooth interface from growth of a dendritic network against a mechanosensitive contractile material

    Medha Sharma et al.
    A smooth and circular interface can form between domains of the cell cortex from local induction of a contractile actomyosin ring by centrifugal pushing forces of an expanding Arp2/3 actin network.
    1. Computational and Systems Biology
    2. Physics of Living Systems

    Hypoxia triggers collective aerotactic migration in Dictyostelium discoideum

    Olivier Cochet-Escartin et al.
    Cell assemblies can use environmental cues created by their own respiration, such as oxygen gradients, to collectively guide themselves to more favorable locations in a remarkably robust and long-lasting way.
    1. Cell Biology

    Selective dephosphorylation by PP2A-B55 directs the meiosis I-meiosis II transition in oocytes

    S Zachary Swartz et al.
    Time-course phosphoproteomics reveals that selective dephosphorylation is critical for directing the MI/MII transition and that, through its inherent phospho-threonine preference, PP2A-B55 imposes specific phosphoregulated behaviors that distinguish the two meiotic divisions.
    1. Immunology and Inflammation
    2. Physics of Living Systems

    T cell stiffness is enhanced upon formation of immunological synapse

    Philipp Jung et al.
    Upon activation of T cell receptors at the contact site, T cells were substantially stiffened at the cell body as well as at the lamellipodia, which is mediated by Ca2+.
    1. Physics of Living Systems

    Effect of malaria parasite shape on its alignment at erythrocyte membrane

    Anil K Dasanna et al.
    A numerical model of malaria parasite adhesion to an erythrocyte shows that the original egg-like shape of merozoites is more robust than other shapes in negotiating various physiological conditions during the alignment process upon erythrocyte invasion.
    1. Physics of Living Systems
    2. Structural Biology and Molecular Biophysics

    Calponin-homology domain mediated bending of membrane-associated actin filaments

    Saravanan Palani et al.
    Combination of actin and curly on lipid membranes constitutes a new, minimalistic system to generate high curvature actin rings that can contract upon the action of myosin II filaments.

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