28 results found
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    A tethered delivery mechanism explains the catalytic action of a microtubule polymerase

    Pelin Ayaz et al.
    Using linked TOG domains that each bind a curved conformation of αβ-tubulin, a microtubule polymerase catalyzes fast elongation by concentrating αβ-tubulin near the polymer end.
    1. Cell Biology
    2. Physics of Living Systems

    The transition state and regulation of γ-TuRC-mediated microtubule nucleation revealed by single molecule microscopy

    Akanksha Thawani et al.
    Four αβ-tubulin dimers associate laterally on γ-TuRC to define the rate-limiting transition state for microtubule nucleation.
    1. Cell Biology

    The microtubule polymerase Stu2 promotes oligomerization of the γ-TuSC for cytoplasmic microtubule nucleation

    Judith Gunzelmann et al.
    Biochemical and genetic approaches show that the XMAP215 homolog Stu2 directly interacts with the small gamma-tubulin complex and its recruitment factor Spc72 to instigate functions in cytoplasmic microtubule organization.
    1. Cell Biology
    2. Structural Biology and Molecular Biophysics

    Design principles of a microtubule polymerase

    Elisabeth A Geyer et al.
    Antagonism between binding to unpolymerized subunits and to the lattice leads to a ratcheting model for the processive action of a microtubule polymerase.
    1. Cell Biology
    2. Structural Biology and Molecular Biophysics

    Structural basis of tubulin recruitment and assembly by microtubule polymerases with tumor overexpressed gene (TOG) domain arrays

    Stanley Nithianantham et al.
    TOG (tumor overexpressed gene) domains organize then polymerize tubulins at microtubule plus ends.
    1. Cell Biology
    2. Structural Biology and Molecular Biophysics

    Structural state recognition facilitates tip tracking of EB1 at growing microtubule ends

    Taylor A Reid et al.
    EB1 targeting to growing microtubule plus-ends is facilitated by tapered microtubule tip structures.
    1. Cell Biology

    chTOG is a conserved mitotic error correction factor

    Jacob A Herman et al.
    The conserved chTOG protein is required to destabilize incorrect kinetochore-microtubule attachments.
    1. Neuroscience

    Cytosolic calcium regulates cytoplasmic accumulation of TDP-43 through Calpain-A and Importin α3

    Jeong Hyang Park et al.
    Genetic and optogenetic analyses in Drosophila neurons reveal calcium as one of the key regulators of nucleocytoplasmic localization of TDP-43 via Calpain-A and Importin α3.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    Kinesin Kip2 enhances microtubule growth in vitro through length-dependent feedback on polymerization and catastrophe

    Anneke Hibbel et al.
    The budding yeast kinesin Kip2 is a polymerase that uses its processive motility in a positive feedback loop to promote microtubule growth.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    A filter at the entrance of the Golgi that selects vesicles according to size and bulk lipid composition

    Maud Magdeleine et al.
    The golgin GMAP-210 captures vesicles at the cis Golgi by merely recognizing the high curvature and lipid unsaturation level of transport vesicles.

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