1,814 results found
    1. Biochemistry and Chemical Biology
    2. Plant Biology

    Limitations to photosynthesis by proton motive force-induced photosystem II photodamage

    Geoffry A Davis et al.
    Storage of solar energy in the thylakoid electrical field by photosynthesis in vivo can substantially destabilize charge-separated states in photosystem II, leading to singlet oxygen production and photodamage, contributing to loss of productivity, especially under fluctuating light experienced in the field.
    1. Structural Biology and Molecular Biophysics

    Hexameric and pentameric complexes of the ExbBD energizer in the Ton system

    Saori Maki-Yonekura et al.
    Crystallography and single particle cryo-EM reveal hexameric and pentameric structures of the ExbBD energizer in the Ton system and oligomeric transition, which provides a unique working mechanism and a new vision of dynamic membrane biology.
    1. Structural Biology and Molecular Biophysics
    2. Microbiology and Infectious Disease

    Bacterial flagella grow through an injection-diffusion mechanism

    Thibaud T Renault et al.
    Single cell, fluorescent microscopy and mathematical modeling reveal how bacterial flagella dynamically assemble outside the cell.
    1. Cell Biology
    2. Physics of Living Systems

    Graded titin cleavage progressively reduces tension and uncovers the source of A-band stability in contracting muscle

    Yong Li et al.
    Elastic forces generated by the giant protein titin define both passive and active tension of skeletal muscle fibers and protect the sarcomeric myosin filaments from severe disruption during contraction.
    1. Computational and Systems Biology
    2. Structural Biology and Molecular Biophysics

    Energetics and conformational pathways of functional rotation in the multidrug transporter AcrB

    Yasuhiro Matsunaga et al.
    High-performance computing simulations reveal how two remote sites in the multidrug transporter AcrB work together for drug extrusion using the proton-motive force.
    1. Physics of Living Systems

    Downsizing the molecular spring of the giant protein titin reveals that skeletal muscle titin determines passive stiffness and drives longitudinal hypertrophy

    Ambjorn Brynnel et al.
    Genetically altering the size of the molecular spring element in the giant protein titin established that titin determines the stiffness of skeletal muscle and the number of sarcomeres in series.
    1. Cell Biology

    Dynein–Dynactin–NuMA clusters generate cortical spindle-pulling forces as a multi-arm ensemble

    Masako Okumura et al.
    Optogenetic reconstitution reveals core functional modules and architecture of the cortical force-generating machinery in human cells.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Two-way communication between SecY and SecA suggests a Brownian ratchet mechanism for protein translocation

    William John Allen et al.
    Evidence is presented that supports a completely new, diffusion-driven mechanism for transporting proteins across membranes in bacteria.
    1. Cell Biology
    2. Structural Biology and Molecular Biophysics

    Munc18-1 catalyzes neuronal SNARE assembly by templating SNARE association

    Junyi Jiao et al.
    Sec1/Munc18-family proteins chaperone SNARE assembly via a common templating mechanism.
    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.

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