727 results found
    1. Neuroscience

    Deletion of KCNQ2/3 potassium channels from PV+ interneurons leads to homeostatic potentiation of excitatory transmission

    Heun Soh et al.
    Loss of potassium channel activity from fast-spiking interneurons increases their excitability leading to unexpectedly increased fast excitatory transmission and seizure susceptibility.
    1. Neuroscience

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

    Derya Sargin et al.
    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. Structural Biology and Molecular Biophysics

    High temperature sensitivity is intrinsic to voltage-gated potassium channels

    Fan Yang, Jie Zheng
    Highly temperature-sensitive behavior of voltage-gated potassium channels provides a mechanistic model for how heat-activated TRP channels serve as temperature and pain sensors.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    Slo1 is the principal potassium channel of human spermatozoa

    Nadja Mannowetz et al.
    Potassium ions enter and leave human sperm cells via a calcium-dependent ion channel that is also pH-independent.
    1. Cell Biology

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

    Shekhar Srivastava et al.
    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. Neuroscience

    Altered potassium channel distribution and composition in myelinated axons suppresses hyperexcitability following injury

    Margarita Calvo et al.
    Type 1 potassium channels alter their composition and localisation to suppress hyper-excitability and neuropathic pain of injured sensory neurons.
    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.
    1. Structural Biology and Molecular Biophysics

    Cryo-EM structure of the ATP-sensitive potassium channel illuminates mechanisms of assembly and gating

    Gregory M Martin et al.
    Single-particle cryo-electron microscopy reveals the first subnanometer structure of ATP-sensitive potassium (KATP) channels, which provides insight into the structural mechanisms of channel assembly and gating.
    1. Neuroscience
    2. Structural Biology and Molecular Biophysics

    Single-particle cryo-EM structure of a voltage-activated potassium channel in lipid nanodiscs

    Doreen Matthies et al.
    The structure of a voltage-activated potassium channel in lipid nanodiscs solved using cryo-electron microscopy is similar to previous X-ray structures, and provides insights into the mechanism of C-type inactivation.
    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 et al.
    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.

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