794 results found
    1. Structural Biology and Molecular Biophysics

    Pore mutation N617D in the skeletal muscle DHPR blocks Ca2+ influx due to atypical high-affinity Ca2+ binding

    Anamika Dayal, Monica L Fernández-Quintero ... Manfred Grabner
    Characterization of Ca2+ selectivity and non-conductance mechanism induced by pore mutation N617D in the skeletal muscle DHPR.
    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    A polyomavirus peptide binds to the capsid VP1 pore and has potent antiviral activity against BK and JC polyomaviruses

    Joshua R Kane, Susan Fong ... Charles A Wartchow
    A peptide derived from BK and JC polyomavirus protein VP2/3 inhibits viral infection by targeting a binding site in the pore of polyomavirus VP1 pentamers, enabling future VP1-targeted therapeutic strategies.
    1. Structural Biology and Molecular Biophysics
    2. Neuroscience

    Structure of a pore-blocking toxin in complex with a eukaryotic voltage-dependent K+ channel

    Anirban Banerjee, Alice Lee ... Roderick MacKinnon
    Charybdotoxin, a toxin produced by scorpions, blocks a K+ channel by binding in a lock-and-key fashion to the mouth of the channel and presenting a lysine amino group, which serves as a K+ mimic in the selectivity filter.
    1. Biochemistry and Chemical Biology

    Dual functions of a small regulatory subunit in the mitochondrial calcium uniporter complex

    Ming-Feng Tsai, Charles B Phillips ... Christopher Miller
    Studies of EMRE, one of the four essential protein subunits in the mitochondrial calcium uniporter complex that regulates calcium ion levels in mitochondria, reveal new details about the physical interactions between the subunits.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Single-molecule analysis of the entire perfringolysin O pore formation pathway

    Conall McGuinness, James C Walsh ... Till Böcking
    Arc-shaped PFO oligomers consisting of at least four subunits can insert into the membrane in a kinetically controlled process opening a transmembrane pore, whereby post-insertion growth may ultimately lead to formation of a complete ring.
    1. Cell Biology

    An amphipathic helix in Brl1 is required for nuclear pore complex biogenesis in S. cerevisiae

    Annemarie Kralt, Matthias Wojtynek ... Karsten Weis
    Genetic, proteomic, and structural analyses provide insight into the role of Brl1 during nuclear pore complex biogenesis, suggesting a function in the fusion of outer and inner nuclear membranes.
    1. Structural Biology and Molecular Biophysics

    Agonist efficiency links binding and gating in a nicotinic receptor

    Dinesh C Indurthi, Anthony Auerbach
    Efficiency measures the fundamental link between agonist binding and protein conformational change, and in nicotinic receptors has 5 values that calibrate energy changes in the induced fit that triggers activation.
    1. Structural Biology and Molecular Biophysics

    Calcium-driven regulation of voltage-sensing domains in BK channels

    Yenisleidy Lorenzo-Ceballos, Willy Carrasquel-Ursulaez ... Ramon Latorre
    Gating currents analysis at different Ca2+ concentrations of BK channels reveals a strong allosteric coupling between Ca2+- and voltage-sensing modules via equivalent contributions exerted by the RCK1 and RCK2 Ca2+-sites.
    1. Neuroscience

    Blocking Kir6.2 channels with SpTx1 potentiates glucose-stimulated insulin secretion from murine pancreatic β cells and lowers blood glucose in diabetic mice

    Yajamana Ramu, Jayden Yamakaze ... Zhe Lu
    The centipede peptide toxin SpTx1 blocks the pore of ATP-sensitive potassium channels in pancreatic β cells to markedly enhance insulin secretion and mitigate hyperglycemia in diabetic mice insensitive to the anti-diabetic sulfonylurea glibenclamide.
    1. Structural Biology and Molecular Biophysics

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

    Lejla Zubcevic, Allen L Hsu ... Seok-Yong Lee
    Ligand-induced two-fold symmetric arrangement in TRPV2 is observed in the native-like nanodisc-reconstituted condition using cryo-electron microscopy.

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