111 results found
    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 et al.
    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.
    1. Structural Biology and Molecular Biophysics

    BK channel inhibition by strong extracellular acidification

    Yu Zhou et al.
    Analysis of iconic and gating currents of wild type and mutated BK channels reveals a strong inhibition of this channel by extracellular acidification and elucidates the underlying mechanism that is potentially applicable to other voltage-dependent cation channels.
    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 et al.
    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. Neuroscience

    ERG-28 controls BK channel trafficking in the ER to regulate synaptic function and alcohol response in C. elegans

    Kelly H Oh et al.
    An endoplasmic reticulum membrane protein regulates synaptic transmission, alcohol sensitivity, and gene expression by controlling the trafficking of a calcium-activated potassium channel.
    1. Structural Biology and Molecular Biophysics

    Calcium-driven regulation of voltage-sensing domains in BK channels

    Yenisleidy Lorenzo-Ceballos et al.
    Gating currents analysis at different Ca2+ concentrations of BK channels reveals a strong allosteric coupling between Ca2+- and voltage-sensing modules via equivalent contributions exerted by the RCK1 and RCK2 Ca2+-sites.
    1. Structural Biology and Molecular Biophysics

    Molecular structures of the human Slo1 K+ channel in complex with β4

    Xiao Tao, Roderick MacKinnon
    The structures of Slo1 in complex with b4 imply that the auxiliary beta subunits modulate the channel's gating properties through stabilizing ‘pre-existing’ conformations rather than creating new ones.
    1. Neuroscience

    Energy imbalance alters Ca2+ handling and excitability of POMC neurons

    Lars Paeger et al.
    The development of diet-dependent obesity results in the deterioration of calcium homeostasis in pro-opiomelanocortin-expressing neurons and impaired function of the same neurons.
    1. Neuroscience

    IK1 channels do not contribute to the slow afterhyperpolarization in pyramidal neurons

    Kang Wang et al.
    The slow afterhyperpolarization that follows a burst of action potentials is a powerful regulator of neuronal excitability and is not due to IK1 (KCNN4), a member of the SK channel family.

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