29 results found
    1. Structural Biology and Molecular Biophysics

    Polyunsaturated fatty acid analogues differentially affect cardiac NaV, CaV, and KV channels through unique mechanisms

    Briana M Bohannon et al.
    Polyunsaturated fatty acid analogues show selectivity for different cardiac ion channels, suggesting their potential use for the treatment of different subtypes of Long QT Syndrome.
    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 et al.
    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

    ML277 specifically enhances the fully activated open state of KCNQ1 by modulating VSD-pore coupling

    Panpan Hou et al.
    ML277 exclusively enhances the AO state voltage-sensing domain (VSD)-pore coupling of KCNQ1 channels, providing an effective tool to investigate the voltge-dependent gating and new strategies for treating long QT syndrome.
    1. Structural Biology and Molecular Biophysics

    Allosteric mechanism for KCNE1 modulation of KCNQ1 potassium channel activation

    Georg Kuenze et al.
    An integrative structural biology approach provides refined models of the KCNQ1-KCNE1 channel complex, which propose a new mechanism to explain how KCNE1 modulates KCNQ1 channel activation.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Unnatural amino acid photo-crosslinking of the IKs channel complex demonstrates a KCNE1:KCNQ1 stoichiometry of up to 4:4

    Christopher I Murray et al.
    The IKs potassium channel complex displays functional flexibility that depends on the ratio of its constituent KCNQ1 and KCNE1 protein subunits.
    1. Structural Biology and Molecular Biophysics

    Graded Ca2+/calmodulin-dependent coupling of voltage-gated CaV1.2 channels

    Rose E Dixon et al.
    The Ca2+-driven functional coupling of CaV1.2 channels is a mechanism of channel memory that may modulate the amplification of Ca2+ influx.
    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. Medicine
    2. Stem Cells and Regenerative Medicine

    Modeling susceptibility to drug-induced long QT with a panel of subject-specific induced pluripotent stem cells

    Francesca Stillitano et al.
    A genetically diverse panel of subject-specific induced pluripotent stem cells models the in vitro susceptibility of cardiac cells to develop a cardiotoxic drug response.
    1. Stem Cells and Regenerative Medicine

    Stem Cells: Put to the test

    Marites T Woon, Timothy J Kamp
    Personalized heart muscle cells made from stem cells in the laboratory could be used to check an individual’s response to potential new drugs before clinical trials.
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    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    The GIRK1 subunit potentiates G protein activation of cardiac GIRK1/4 hetero-tetramers

    Kouki K Touhara et al.
    The GIRK1 subunit contains a defective Na+-binding site but behaves as if it is permanently bound to a sodium ion, and therefore increases the affinity of Gβγ to GIRK1/4 hetero-tetrameric channels in lipid membranes.

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