3,025 results found
    1. Cell Biology

    DNA damage induces nuclear actin filament assembly by Formin-2 and Spire-1/2 that promotes efficient DNA repair

    Brittany J Belin et al.
    An efficient response to DNA damage requires the assembly of actin filaments in the nucleus.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Lamellipodin promotes actin assembly by clustering Ena/VASP proteins and tethering them to actin filaments

    Scott D Hansen, R Dyche Mullins
    Lamellipodin, an important regulator of cytoskeletal and assembly cell migration, enhances the activity of Ena/VASP family actin polymerases by clustering them on leading-edge membranes and tethering them to actin filaments.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Synergy between Wsp1 and Dip1 may initiate assembly of endocytic actin networks

    Connor J Balzer et al.
    An activator of branching nucleation by Arp2/3 complex directly synergizes with an activator of linear filament nucleation to initiate assembly of actin networks that drive endocytosis.
    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
    2. Neuroscience

    Neurexin–Neuroligin 1 regulates synaptic morphology and functions via the WAVE regulatory complex in Drosophila neuromuscular junction

    Guanglin Xing et al.
    Neurexin–Neuroligin1 complex positively regulates F-actin assembly through direct interaction with WAVE complex to control normal synaptic growth and electrophysiological function in Drosophila neuromuscular junction.
    1. Cell Biology

    Actin assembly ruptures the nuclear envelope by prying the lamina away from nuclear pores and nuclear membranes in starfish oocytes

    Natalia Wesolowska et al.
    Combined light and electron microscopy reveals a new function for Arp2/3-mediated actin assembly in nuclear envelope rupture, which leads to a separation of nuclear membranes and pores from the lamina.
    1. Cell Biology

    Switch-like Arp2/3 activation upon WASP and WIP recruitment to an apparent threshold level by multivalent linker proteins in vivo

    Yidi Sun et al.
    Intersectin counterparts in yeast recruit WASP and WIP to endocytic sites to establish a robust multivalent SH3 domain-PRM interaction network which gives actin assembly onset a switch-like behavior in vivo.
    1. Structural Biology and Molecular Biophysics

    Rac1 GTPase activates the WAVE regulatory complex through two distinct binding sites

    Baoyu Chen et al.
    The cryo-electron microscopy structure of an assembly of the WAVE Regulatory Complex and its activator, the Rac GTPase, plus complementary biochemistry and biophysics, reveal a novel activation mechanism involving two distinct Rac binding sites.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    INAVA-ARNO complexes bridge mucosal barrier function with inflammatory signaling

    Phi Luong et al.
    Inflammatory bowel disease risk-gene, INAVA and the ARF-GEF ARNO, regulates non-canonical cortical actin assembly and IL-1b signaling to maintain epithelial homeostasis.
    1. Cell Biology
    2. Microbiology and Infectious Disease

    Three F-actin assembly centers regulate organelle inheritance, cell-cell communication and motility in Toxoplasma gondii

    Nicolò Tosetti et al.
    Toxoplasma gondii formins have several non-overlapping roles including generating an apico-basal flux of F-actin that is controlled by phosphorylation and methylation and is essential for motility.

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