228 results found
    1. Structural Biology and Molecular Biophysics

    Single molecule FRET reveals pore size and opening mechanism of a mechano-sensitive ion channel

    Yong Wang et al.
    Observation by single molecule FRET of MscL, a prokaryotic mechanosensitive channel, reveals that MscL opens via the helix-tilt model and its pore reaches 2.8 nm in diameter.
    1. Chromosomes and Gene Expression
    2. Computational and Systems Biology

    Simple biochemical features underlie transcriptional activation domain diversity and dynamic, fuzzy binding to Mediator

    Adrian L Sanborn et al.
    Transcriptional activation domains achieve rapid, dynamic, specific interaction with Mediator through binding of an unstructured peptide to multiple hydrophobic surfaces without particular amino acid side chain interactions.
    1. Structural Biology and Molecular Biophysics

    Structure and mechanism of the Mrp complex, an ancient cation/proton antiporter

    Julia Steiner, Leonid Sazanov
    Structure of the Mrp antiporter, an ancestor of respiratory complex I, suggests a mechanism of coupling between cation and proton translocation, applicable to a large family of related membrane proteins.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Implications of the differing roles of the β1 and β3 transmembrane and cytoplasmic domains for integrin function

    Zhenwei Lu et al.
    Diverse biophysical properties of β1 and β3 integrin transmembrane and cytoplasmic domains result in distinct mechanisms of integrin activation and function.
    1. Structural Biology and Molecular Biophysics
    2. Computational and Systems Biology

    CryoEM and computer simulations reveal a novel kinase conformational switch in bacterial chemotaxis signaling

    C Keith Cassidy et al.
    An atomic model of the bacterial chemosensory array obtained through the synthesis of cryo-electron tomography and large-scale molecular-dynamics simulations reveals a new kinase conformation during signaling events.
    1. Cell Biology
    2. Structural Biology and Molecular Biophysics

    The role of scaffold reshaping and disassembly in dynamin driven membrane fission

    Martina Pannuzzo et al.
    Computational modeling of a dynamin-constricted membrane neck can rank proposed shape changes of the helical scaffold in terms of their fission aptitude and elucidate the associated pathways.
    1. Structural Biology and Molecular Biophysics

    Structure of mouse protocadherin 15 of the stereocilia tip link in complex with LHFPL5

    Jingpeng Ge et al.
    Structures of a mouse PCDH15 and LHFPL5 complex, two proteins involved in converting sound into electrical signals, illuminate how mechanical stimuli are delivered to the membrane of inner ear hair cells.
    1. Neuroscience
    2. Structural Biology and Molecular Biophysics

    Mutational analysis to explore long-range allosteric couplings involved in a pentameric channel receptor pre-activation and activation

    Solène N Lefebvre et al.
    A pentameric channel-receptor was studied by combining allosteric mutations, electrophysiology, fluorescent reporters and normal mode analysis, to dissect the long-range allosteric couplings specifically involved in its pre-activation and activation.
    1. Structural Biology and Molecular Biophysics

    Symmetry transitions during gating of the TRPV2 ion channel in lipid membranes

    Lejla Zubcevic et al.
    Ligand-induced two-fold symmetric arrangement in TRPV2 is observed in the native-like nanodisc-reconstituted condition using cryo-electron microscopy.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Fusion surface structure, function, and dynamics of gamete fusogen HAP2

    Juan Feng et al.
    Structure, dynamics, and mutation of a gamete fusion protein and comparisons to viral homologues suggest that after trimerization the domain bearing the membrane-inserting fusion loops can pivot with respect to the trimer 3-fold axis.

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