538 results found
    1. Neuroscience

    Chronic social isolation reduces 5-HT neuronal activity via upregulated SK3 calcium-activated potassium channels

    Derya Sargin, David K Oliver, Evelyn K Lambe
    Serotonin neurons in chronically isolated mice become less responsive to excitatory stimulation, but inhibiting a distinctive calcium-activated potassium channel can restore both neuronal activity and behavior.
    1. Neuroscience

    Dendritic small conductance calcium-activated potassium channels activated by action potentials suppress EPSPs and gate spike-timing dependent synaptic plasticity

    Scott L Jones, Minh-Son To, Greg J Stuart
    The activation of small-conductance calcium-activated potassium channels in spines by action potentials regulates the induction of spike-timing dependent synaptic plasticity during low-frequency single action potential–EPSP pairing.
    1. Cell Biology

    Histidine phosphorylation relieves copper inhibition in the mammalian potassium channel KCa3.1

    Shekhar Srivastava, Saswati Panda ... Edward Y Skolnik
    The mammalian potassium channel KCa3.1, which is important for T- and B-cell activation, is inhibited by cytoplasmic copper, mediated by a histidine residue (His358) that is phosphorylated to activate the channel.
    1. Structural Biology and Molecular Biophysics

    Activation of the archaeal ion channel MthK is exquisitely regulated by temperature

    Yihao Jiang, Vinay Idikuda ... Baron Chanda
    Temperature-sensitivity of archaebacterial potassium channel MthK is regulated by RCK domain via alteration of allosteric coupling.
    1. Neuroscience

    Melanopsin activates divergent phototransduction pathways in intrinsically photosensitive retinal ganglion cell subtypes

    Ely Contreras, Jacob D Bhoi ... Tiffany M Schmidt
    Melanopsin phototransduction targets distinct complements of transduction channels across intrinsically photosensitive retinal ganglion cell subtypes and does not require hyperpolarization-activated cyclic nucleotide-gated channels.
    1. Neuroscience

    Shank promotes action potential repolarization by recruiting BK channels to calcium microdomains

    Luna Gao, Jian Zhao ... Joshua M Kaplan
    Shank promotes functional coupling between CaV1 calcium channels and BK potassium channels.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    The Ca2+-activated K+ current of human sperm is mediated by Slo3

    Christoph Brenker, Yu Zhou ... Timo Strünker
    The principal potassium ion channel in human sperm, Slo3, is primarily activated by calcium ions and controls the membrane potential of human sperm by intracellular calcium ion levels rather than intracellular pH.
    1. Cell Biology

    Potassium dependent rescue of a myopathy with core-like structures in mouse

    M Gartz Hanson, Jonathan J Wilde ... Lee Niswander
    A mouse model of human muscle myopathy is used to provide mechanistic insight, identify possible biomarkers of disease, and suggest possible therapeutic strategies to alleviate muscle weakness.
    1. Neuroscience

    Ca2+ entry through NaV channels generates submillisecond axonal Ca2+ signaling

    Naomi AK Hanemaaijer, Marko A Popovic ... Maarten HP Kole
    High-speed calcium imaging from the axon initial segment shows that sodium channels are in part permeable to calcium ions.
    1. Structural Biology and Molecular Biophysics

    Proximal clustering between BK and CaV1.3 channels promotes functional coupling and BK channel activation at low voltage

    Oscar Vivas, Claudia M Moreno ... Bertil Hille
    Super-resolution imaging reveals a novel multi-channel arrangement that explains how big potassium (BK) channel activation closely tracks the opening of low-voltage-activated L-type calcium channels.

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