18 results found
    1. Structural Biology and Molecular Biophysics

    The divergent mitotic kinesin MKLP2 exhibits atypical structure and mechanochemistry

    Joseph Atherton et al.
    MKLP2 is a divergent molecular motor that has structurally evolved to bind its microtubule track and use the energy of ATP in distinct ways, tuned according to its function in cell division.
    1. Structural Biology and Molecular Biophysics
    2. Computational and Systems Biology

    Kinesin motility is driven by subdomain dynamics

    Wonmuk Hwang et al.
    The motor protein kinesin utilizes its fuel molecule by active and concerted motions of its subdomains, while it rapidly interacts with the microtubule track by forming a wet and dynamic interface.
    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 et al.
    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. 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 et al.
    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

    Intracellular functions and motile properties of bi-directional kinesin-5 Cin8 are regulated by neck linker docking

    Alina Goldstein-Levitin et al.
    Precise hydrogen-bond stabilization of the neck linker docking onto the catalytic motor domain, is crucial for motor activity and intracellular functions of the bi-directional mitotic kinesin-5 Cin8.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    Bipolar filaments of human nonmuscle myosin 2-A and 2-B have distinct motile and mechanical properties

    Luca Melli et al.
    Individual nonmuscle myosin 2 filaments in cells may differ their mechanical and kinetic properties depending on the myosin paralog composition giving the cells a mechanism for fine tuning the output of a given nonmuscle myosin filament.
    1. Cell Biology
    2. Computational and Systems Biology

    Human kinetochores are swivel joints that mediate microtubule attachments

    Chris A Smith et al.
    The outer domain of the kinetochore can rotate (swivel) around the centromere, and this rather than intra-kinetochore stretching is coupled to anaphase onset.
    1. Structural Biology and Molecular Biophysics

    Molecular Motors: Small steps and giant leaps

    Bram Prevo, Erwin JG Peterman
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    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Single molecule mechanics resolves the earliest events in force generation by cardiac myosin

    Michael S Woody et al.
    Cardiac myosin converts energy from ATP into mechanical work by transitioning from a short-lived force-bearing state, to a post working stroke state before the release of inorganic phosphate.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Synergy between RecBCD subunits is essential for efficient DNA unwinding

    Rani Zananiri et al.
    A new optical tweezers assay sheds light on the mechanism of cooperation and force generation by the subunits of RecBCD, critical for the repair of double strand breaks in bacteria.

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