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    1. Cell Biology
    2. Developmental Biology

    Anisotropic organization of circumferential actomyosin characterizes hematopoietic stem cells emergence in the zebrafish

    Mylene Lancino et al.
    Emergence of hematopoietic stem cells from an aortic component is a unique phenomenon of cell extrusion, with no equivalent in cell biology, and which is adapted to environmental constraints exerted by endothelial cells and hemodynamics forces.
    1. Developmental Biology
    2. Structural Biology and Molecular Biophysics

    Large, long range tensile forces drive convergence during Xenopus blastopore closure and body axis elongation

    David R Shook et al.
    Blastopore closure in Xenopus is driven by two morphogenic mechanisms that have strongly context dependent effects on tissue movement and that generate tensile force across tissues: convergent extension, as expected, and, unexpectedly, convergent thickening.
    1. Chromosomes and Gene Expression

    Scc2/Nipbl hops between chromosomal cohesin rings after loading

    James Rhodes et al.
    The cohesin loading factor Scc2/Nipbl interacts frequently with cohesin after the loading reaction in a manner consistent with a role in stimulating loop extrusion.
    1. Neuroscience

    A multicellular rosette-mediated collective dendrite extension

    Li Fan et al.
    Migrating skin carries the amphid rosette vertex anteriorly to extrude and position dendrites.
    1. Cell Biology
    2. Structural Biology and Molecular Biophysics

    Tunable molecular tension sensors reveal extension-based control of vinculin loading

    Andrew S LaCroix et al.
    A quantitative understanding of molecular tension sensor function enables the production of unique sensors with desired mechanical properties as well as the ability to distinguish between protein force and protein deformation in mechanosensitive processes.
  1. Nuclear pore assembly proceeds by an inside-out extrusion of the nuclear envelope

    Shotaro Otsuka et al.
    Nuclear pores assemble asymmetrically, by an inside-out evagination of the inner nuclear membrane that grows in diameter and depth until it fuses with the flat outer nuclear membrane.
    1. Cell Biology
    2. Plant Biology

    Stromule extension along microtubules coordinated with actin-mediated anchoring guides perinuclear chloroplast movement during innate immunity

    Amutha Sampath Kumar et al.
    Stromules induced during plant innate immunity dynamically interact and use the cytoskeleton to form and to direct the movement of chloroplasts.
    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. Biochemistry and Chemical Biology

    Crystallographic observation of nonenzymatic RNA primer extension

    Wen Zhang et al.
    Time resolved crystal structures reveal the binding of activated monomers to the template, followed by generation of the imidazolium-bridged dinucleotide intermediate, and finally formation of a phosphodiester bond between the primer and the adjacent monomer.
    1. Cell Biology

    SUMO peptidase ULP-4 regulates mitochondrial UPR-mediated innate immunity and lifespan extension

    Kaiyu Gao et al.
    SUMOylation regulates mitochondrial UPR signaling through modulation of transcription factors DVE-1 and ATFS-1.