56 results found
    1. Structural Biology and Molecular Biophysics

    Structure and physiological function of the human KCNQ1 channel voltage sensor intermediate state

    Keenan C Taylor, Po Wei Kang ... Charles R Sanders
    The intermediate state conformation of the human KCNQ1 potassium channel voltage sensor domain was determined, validated, and shown to be conductive under physiological conditions.
    1. Biochemistry and Chemical Biology

    Mapping the molecular motions of 5-HT3 serotonin-gated channel by voltage-clamp fluorometry

    Laurie Peverini, Sophie Shi ... Pierre-Jean Corringer
    Conformational motions elicited by antagonists, partial agonists, and agonists in serotonin-gated ion channels 5-HT3AR progressively spread from the extracellular to the transmembrane domain.
    1. Structural Biology and Molecular Biophysics

    Voltage-clamp fluorometry analysis of structural rearrangements of ATP-gated channel P2X2 upon hyperpolarization

    Rizki Tsari Andriani, Yoshihiro Kubo
    A fluorometric analysis under voltage clamp shows the presence of a converged electric field in P2X2 channel with no canonical voltage-sensor and identifies the structural determinants for the voltage-dependent gating.
    1. Structural Biology and Molecular Biophysics
    2. Neuroscience

    Molecular mechanism of voltage-dependent potentiation of KCNH potassium channels

    Gucan Dai, William N Zagotta
    A powerful new fluorescence approach elucidates the structural mechanism for a specialized ion channel behavior important for cardiac and neuronal excitability.
    1. Structural Biology and Molecular Biophysics

    Distinctive mechanisms of epilepsy-causing mutants discovered by measuring S4 movement in KCNQ2 channels

    Michaela A Edmond, Andy Hinojo-Perez ... Rene Barro-Soria
    Because voltage-gated KCNQ2 channels are central to physiological and pathophysiological events, understanding how disease-causing mutations in different channel regions disrupt function will help future development of mutation-specific antiepileptic therapies.
    1. Structural Biology and Molecular Biophysics

    Fatty acid analogue N-arachidonoyl taurine restores function of IKs channels with diverse long QT mutations

    Sara I Liin, Johan E Larsson ... H Peter Larsson
    Fatty acid analogues are interesting prototype compounds that may inspire the development of future IKs channel activators to treat patients with long QT syndrome caused by diverse arrhythmia-causing mutations in the IKs channel.
    1. Structural Biology and Molecular Biophysics

    TMEM266 is a functional voltage sensor regulated by extracellular Zn2+

    Ferenc Papp, Suvendu Lomash ... Kenton Jon Swartz
    Transmembrane protein 266 contains a functional S1-S4 voltage-sensing domain that is regulated by extracellular Zn2+ ions.
    1. Structural Biology and Molecular Biophysics

    Voltage-dependent dynamics of the BK channel cytosolic gating ring are coupled to the membrane-embedded voltage sensor

    Pablo Miranda, Miguel Holmgren, Teresa Giraldez
    Allosteric modulation of BK channels, vital for the physiology of nerve, muscle and endocrine cells, is determined by direct coupling between gating ring RCK1 domains and the voltage sensor function.
    1. Structural Biology and Molecular Biophysics
    2. Neuroscience

    Single-molecule fluorimetry and gating currents inspire an improved optical voltage indicator

    Jeremy S Treger, Michael F Priest, Francisco Bezanilla
    ArcLight, a popular optogenetic reporter of voltage, is studied at both single-molecule and macroscopic levels, which leads to new mechanistic understanding and to the rational design of a faster reporter.
    1. Structural Biology and Molecular Biophysics

    The isolated voltage sensing domain of the Shaker potassium channel forms a voltage-gated cation channel

    Juan Zhao, Rikard Blunck
    Expression of the isolated voltage sensing domain significantly alters its structural conformation as well as its gating kinetics, indicating the importance of studying the biological assembly in its entirety.

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