666 results found
    1. Cell Biology

    Waves of actin and microtubule polymerization drive microtubule-based transport and neurite growth before single axon formation

    Amy M Winans, Sean R Collins, Tobias Meyer
    Waves of polymerizing actin work in concert with microtubule polymerization to lay down more microtubules tracks and transiently increase microtubule-based transport into the growing neurite.
    1. Cell Biology
    2. Immunology and Inflammation

    Microtubules restrict F-actin polymerization to the immune synapse via GEF-H1 to maintain polarity in lymphocytes

    Judith Pineau, Léa Pinon ... Paolo Pierobon
    Microfluidics and dynamic imaging allow systematic characterization of polarization kinetics in B lymphocytes and highlight the role of microtubules as master regulators of actin polymerization at the immune synapse.
    1. Biochemistry and Chemical Biology

    On the role of nucleotides and lipids in the polymerization of the actin homolog MreB from a Gram-positive bacterium

    Wei Mao, Lars D Renner ... Rut Carballido-Lopez
    First 3D-structure and first observation of organized protofilaments of MreB from a Gram-positive bacterium, suggesting a model where ATP drives the formation of dynamic pairs of MreB protofilaments on a lipid surface.
    1. Cell Biology
    2. Microbiology and Infectious Disease

    Formin-2 drives polymerisation of actin filaments enabling segregation of apicoplasts and cytokinesis in Plasmodium falciparum

    Johannes Felix Stortz, Mario Del Rosario ... Sujaan Das
    Formin-2 controls spatiotemporal polymerisation of actin filaments, a common mechanism used by apicomplexans for effective segregation of essential chloroplast-like organelles called apicoplasts, and additionally for daughter formation in Plasmodium falciparum.
    1. Cancer Biology
    2. Cell Biology

    ERK3/MAPK6 dictates CDC42/RAC1 activity and ARP2/3-dependent actin polymerization

    Katarzyna Bogucka-Janczi, Gregory Harms ... Krishnaraj Rajalingam
    ERK3 controls actin cytoskeleton.
    1. Cell Biology

    Calcium-mediated actin reset (CaAR) mediates acute cell adaptations

    Pauline Wales, Christian E Schuberth ... Roland Wedlich-Söldner
    Calcium influx during acute cell stimulation triggers a global actin reset in mammalian cells, which is linked to plasma membrane repair and transcription and has implications for our understanding of cell migration, cancer, inflammation and cell stress response.
    1. Neuroscience

    Palmitoylation of LIM Kinase-1 ensures spine-specific actin polymerization and morphological plasticity

    Joju George, Cary Soares ... Gareth M Thomas
    The protein-lipid modification palmitoylation targets the kinase LIMK1 to dendritic spines to ensure precise control of the size of individual spines in response to synaptic activation.
    1. Cell Biology
    2. Physics of Living Systems

    A mechanism with severing near barbed ends and annealing explains structure and dynamics of dendritic actin networks

    Danielle Holz, Aaron R Hall ... Dimitrios Vavylonis
    Computational modeling and single molecule imaging data support frequent disassembly and annealing of newly assembled actin, a process that can underlie structural changes of lamellipodial actin networks.
    1. Cell Biology

    N-WASP-dependent branched actin polymerization attenuates B-cell receptor signaling by increasing the molecular density of receptor clusters

    Anshuman Bhanja, Margaret K Seeley-Fallen ... Wenxia Song
    B-cells generate inner actomyosin foci from lamellipodial actin networks to drive cell contraction on antigen-presenting surfaces, which causes signaling molecule disassociation from B-cell receptor clusters and signal attenuation.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Profilin and formin constitute a pacemaker system for robust actin filament growth

    Johanna Funk, Felipe Merino ... Peter Bieling
    Profilin release from the filament end controls the speed of actin growth at physiological conditions.

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