576 results found
    1. Microbiology and Infectious Disease
    2. Structural Biology and Molecular Biophysics

    A contractile injection system stimulates tubeworm metamorphosis by translocating a proteinaceous effector

    Charles F Ericson et al.
    Bacteria produce a syringe-like structure, loaded with a single protein within the lumen of its needle-like tube, that is sufficient for stimulating animal metamorphosis.
    1. Computational and Systems Biology
    2. Developmental Biology

    Vascular dimorphism ensured by regulated proteoglycan dynamics favors rapid umbilical artery closure at birth

    Sumeda Nandadasa et al.
    Morphologic, molecular, biomechanical and computational analyses show that the specialized extracellular matrix architecture of the umbilical artery contributes to its rapid closure at birth and regulates smooth muscle cell differentiation.
    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. Developmental Biology

    Glucose inhibits cardiac muscle maturation through nucleotide biosynthesis

    Haruko Nakano et al.
    During cardiogenesis, the major role of glucose is not the catabolic extraction of energy but the anabolic biosynthesis of nucleotides.
    1. Developmental Biology
    2. Evolutionary Biology

    Two consecutive microtubule-based epithelial seaming events mediate dorsal closure in the scuttle fly Megaselia abdita

    Juan Jose Fraire-Zamora et al.
    Evolutionary reduction in tissue number involves the simplification of the seaming process but not signaling during epithelial fusion.
    1. Cell Biology
    2. Developmental Biology

    Cell-intrinsic and -extrinsic mechanisms promote cell-type-specific cytokinetic diversity

    Tim Davies et al.
    Functional molecular analysis of cytokinesis in Caenorhabditis elegans four-cell embryos reveals cell-type-specific variation in the fundamental dependence on a robust f-actin cytoskeleton for successful cell division, mediated by both cell-intrinsic and -extrinsic pathways.
    1. Cell Biology

    A disassembly-driven mechanism explains F-actin-mediated chromosome transport in starfish oocytes

    Philippe Bun et al.
    On entry to meiosis, chromosomes scattered in the large oocyte nucleus of starfish are collected by an F-actin network, which contracts by an unexpected, myosin-independent mechanism based on local assembly and global disassembly of actin filaments.
    1. Computational and Systems Biology
    2. Developmental Biology

    Vertex sliding drives intercalation by radial coupling of adhesion and actomyosin networks during Drosophila germband extension

    Timothy E Vanderleest et al.
    Tricellular vertices possess sliding behaviors that harness radial forces and drive cell shape changes and intercalation in an epithelial tissue.
    1. Cell Biology
    2. Developmental Biology

    Caenorhabditis elegans PIEZO channel coordinates multiple reproductive tissues to govern ovulation

    Xiaofei Bai et al.
    Depletion of the mechanosensitive ion channel PEZO-1 in C. elegans disrupts the sheath and spermathecae cells to disrupt oocyte ovulation, resulting in crushed oocytes.
    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.

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