1,970 results found
    1. Structural Biology and Molecular Biophysics

    Allosteric regulators selectively prevent Ca2+-feedback of CaV and NaV channels

    Jacqueline Niu et al.
    Two structurally-unrelated regulatory proteins utilize parallel molecular mechanisms to selectively tune calcium and calmodulin feedback of calcium and sodium ion channels and reveals a novel strategy to engineer synthetic channel modulators.
    1. Neuroscience

    The paranodal cytoskeleton clusters Na+ channels at nodes of Ranvier

    Veronique Amor et al.
    Single and double-knockout mouse models for proteins associated with nodes of Ranvier reveal that a paranodal, spectrin-based lateral diffusion barrier is sufficient to cluster Na+ channels at nodes of Ranvier.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Cooperative regulation by G proteins and Na+ of neuronal GIRK2 K+ channels

    Weiwei Wang et al.
    Determining how GIRK2 activity depends on the concentration of Gβγ subunits in lipid membranes at different Na+ concentrations has allowed the Gβγ concentration generated during GABAB activation in neurons to be estimated.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Quantitative analysis of mammalian GIRK2 channel regulation by G proteins, the signaling lipid PIP2 and Na+ in a reconstituted system

    Weiwei Wang et al.
    The G protein subunits Gβγ and the signaling lipid PIP2 are simultaneously needed to activate the potassium ion channel GIRK2 to control the voltage across a lipid bilayer, while sodium ions modulate these molecules' effects.
    1. Human Biology and Medicine
    2. Neuroscience

    SUMOylation of NaV1.2 channels mediates the early response to acute hypoxia in central neurons

    Leigh D Plant et al.
    The immediate response of the brain to a sudden, harmful drop in oxygen supply is the addition of SUMO proteins to sodium ion channels in neurons, increasing their activity.
    1. Cell Biology

    H+- and Na+- elicited rapid changes of the microtubule cytoskeleton in the biflagellated green alga Chlamydomonas

    Yi Liu et al.
    Acidification and salt, which are two major stresses caused by environmental changes, swiftly and drastically alter the microtubule system in green algae and likely many other organisms.
    1. Neuroscience

    Visualization of currents in neural models with similar behavior and different conductance densities

    Leandro M Alonso, Eve Marder
    Visualization methods display the dynamics of the currents in conductance-based model neurons, and show how their contribution changes in response to perturbation.
    1. Structural Biology and Molecular Biophysics

    Binary architecture of the Nav1.2-β2 signaling complex

    Samir Das et al.
    X-ray crystallography reveals new conceptual insights into the location of the β2-subunit in the Nav channel signaling complex.
    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.
    1. Cell Biology

    Profound regulation of Na/K pump activity by transient elevations of cytoplasmic calcium in murine cardiac myocytes

    Fang-Min Lu et al.
    Transient Ca elevations of cytoplasmic calcium in cardiac myocytes profoundly activate cardiac Na/K pump activity in parallel with physical-chemical changes of the sarcolemma but without involvement of conventional signaling mechanisms.

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