407 results found
    1. Structural Biology and Molecular Biophysics

    Promiscuous binding by Hsp70 results in conformational heterogeneity and fuzzy chaperone-substrate ensembles

    Rina Rosenzweig et al.
    Multiple chaperone binding sites on substrates suggest a mechanism by which the Hsp70 chaperone can circumvent kinetic traps in protein folding.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    E. coli TraR allosterically regulates transcription initiation by altering RNA polymerase conformation

    James Chen et al.
    Cryo-electron microscopy structures, combined with biochemical experiments, show how the E. coli F element-encoded TraR protein regulates transcription initiation by altering RNA polymerase conformation and conformational heterogeneity.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Functional instability allows access to DNA in longer transcription Activator-Like effector (TALE) arrays

    Kathryn Geiger-Schuller et al.
    Single molecule DNA-binding trajectories and deterministic modeling analyses demonstrate a functional role for high energy partly folded states in Transcription Activator-Like Effectors that could improve future TALEN design.
    1. Structural Biology and Molecular Biophysics

    Routine single particle CryoEM sample and grid characterization by tomography

    Alex J Noble et al.
    Fiducial-less tomography on single particle cryoEM samples reveals that most particles are adsorbed to the air-water interface and allows for researchers to diagnose and solve sample, grid, ice thickness, collection, and processing issues.
    1. Structural Biology and Molecular Biophysics

    Allosteric fine-tuning of the conformational equilibrium poises the chaperone BiP for post-translational regulation

    Lukasz Wieteska et al.
    The molecular chaperone BIP from the endoplasmic reticulum is fine-tuned postranslationally through the thermodynamic and kinetic alterations in its conformational ensemble of functionally and structurally distinct physiological forms.
    1. Structural Biology and Molecular Biophysics

    Mapping the conformational landscape of a dynamic enzyme by multitemperature and XFEL crystallography

    Daniel A Keedy et al.
    The conformations of the enzyme cyclophilin A that are essential for its catalytic activity are temperature dependent and exhibit diverse responses, which is consistent with a complex energy landscape.
    1. Structural Biology and Molecular Biophysics

    Structure and dynamics of a nanodisc by integrating NMR, SAXS and SANS experiments with molecular dynamics simulations

    Tone Bengtsen et al.
    Molecular simulations, small-angle X-ray and neutron scattering experiments and previously measured NMR experiments were combined to study the structure and dynamics of the proteins and lipids in a nanodisc.
    1. Neuroscience
    2. Structural Biology and Molecular Biophysics

    Conformational dynamics between transmembrane domains and allosteric modulation of a metabotropic glutamate receptor

    Vanessa A Gutzeit et al.
    Single molecule subunit counting, FRET and electrophysiology experiments reveal that metabotropic glutamate receptor subunits interact and rearrange at the level of the transmembrane domains in response to allosteric modulators.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural insights into the Ca2+-dependent gating of the human mitochondrial calcium uniporter

    Yan Wang et al.
    Cryo-EM structures of human MCU-EMRE-MICU1-MICU2 complex in the apo and Ca2+-bound states reveal how MICU1 and MICU2 impart their gating function to the mitochondrial calcium uniporter.
    1. Microbiology and Infectious Disease
    2. Structural Biology and Molecular Biophysics

    Epitope resurfacing on dengue virus-like particle vaccine preparation to induce broad neutralizing antibody

    Wen-Fan Shen et al.
    Despite size heterogeneity, an epitope-resurfaced mature-form dengue VLP has the potential to induce quaternary structure-recognizing broad cross-reactive neutralizing antibodies.

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