2,049 results found
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Molecular determinants of the Ska-Ndc80 interaction and their influence on microtubule tracking and force-coupling

    Pim J Huis in 't Veld, Vladimir A Volkov ... Marileen Dogterom
    Binding of two macromolecular complexes allows kinetochores to capture force produced by the depolymerising ends of microtubules, allowing chromosomes to be transmitted from a mother cell to its two daughters.
    1. Cell Biology
    2. Physics of Living Systems

    Force propagation between epithelial cells depends on active coupling and mechano-structural polarization

    Artur Ruppel, Dennis Wörthmüller ... Martial Balland
    Combining micropatterning, traction force microscopy, and optogenetics, it is shown that epithelial cells actively respond to mechanical signals from neighboring cells.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Mechanochemical coupling and bi-phasic force-velocity dependence in the ultra-fast ring ATPase SpoIIIE

    Ninning Liu, Gheorghe Chistol ... Carlos Bustamante
    Probing the DNA motor SpoIIIE at the single-molecule level has revealed its force-generating step, rich translocation dynamics during motor operation and a novel, bi-phasic mechanical response to opposing force.
    1. Cell Biology
    2. Structural Biology and Molecular Biophysics

    Working strokes produced by curling protofilaments at disassembling microtubule tips can be biochemically tuned and vary with species

    Lucas E Murray, Haein Kim ... Charles L Asbury
    Laser trap measurements show that mechanical work output from curling protofilaments is enhanced by adding magnesium, and that yeast microtubules generate larger and more energetic working strokes than bovine microtubules.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    Direct measurement of conformational strain energy in protofilaments curling outward from disassembling microtubule tips

    Jonathan W Driver, Elisabeth A Geyer ... Charles L Asbury
    The protofilaments that curl outward from a disassembling microtubule tip carry a large amount of strain energy and they can drive movement with an efficiency similar to conventional motor proteins.
    1. Cell Biology
    2. Physics of Living Systems

    Mechanical coupling coordinates microtubule growth

    Bonnibelle K Leeds, Katelyn F Kostello ... Charles L Asbury
    Microtubules grow at highly variable rates, but they can be tightly coordinated merely by coupling their tips to a single shared load.
    1. Physics of Living Systems

    Plasticity of cell migration resulting from mechanochemical coupling

    Yuansheng Cao, Elisabeth Ghabache, Wouter-Jan Rappel
    Computational and experimental studies show that different migration modes of eukaryotic cells are the result of the interplay between signaling waves and cell mechanics.
    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, Eric M Kasprowicz ... Raymond Keller
    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. Physics of Living Systems
    2. Structural Biology and Molecular Biophysics

    Piezo1 as a force-through-membrane sensor in red blood cells

    George Vaisey, Priyam Banerjee ... Roderick MacKinnon
    Super-resolution microscopy and single particle tracking analysis of Piezo1 in red blood cells demonstrate its ability to sense membrane curvature, consistent with a force-through-membrane mechanism of channel mechanosensation in these cells.
    1. Physics of Living Systems

    Strong confinement of active microalgae leads to inversion of vortex flow and enhanced mixing

    Debasmita Mondal, Ameya G Prabhune ... Prerna Sharma
    Coupling between cell motility and strong confinement alters the force generators that cause flow fields to change their handedness and lead to enhanced mixing.

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