26 results found
    1. Structural Biology and Molecular Biophysics
    2. Neuroscience

    Molecular structure of human KATP in complex with ATP and ADP

    Kenneth Pak Kin Lee, Jue Chen, Roderick MacKinnon
    MgADP binding to the high-affinity 'consensus' ATPase active site of SUR1 and remodeling of the L0-loop (lasso region) overrides tonic ATP inhibition of KATP channels.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Anti-diabetic drug binding site in a mammalian KATP channel revealed by Cryo-EM

    Gregory M Martin, Balamurugan Kandasamy ... Show-Ling Shyng
    A structure of a pancreatic ATP-sensitive potassium channel complex at 3.63Å resolution obtained by cryo-electron microscopy reveals how a commonly used anti-diabetic drug interacts with and inhibits the channel to stimulate insulin secretion.
    1. Cell Biology

    β-cell deletion of the PKm1 and PKm2 isoforms of pyruvate kinase in mice reveals their essential role as nutrient sensors for the KATP channel

    Hannah R Foster, Thuong Ho ... Matthew J Merrins
    Local ATP production by the plasma membrane-associated glycolytic enzyme pyruvate kinase is essential for the nutrient-dependent closure of the ATP-sensitive potassium channels that initiate insulin release from pancreatic β-cells.
    1. Medicine

    Ankyrin-G mediates targeting of both Na+ and KATP channels to the rat cardiac intercalated disc

    Hua-Qian Yang, Marta Pérez-Hernández ... William A Coetzee
    The functional interaction of Na+ and KATP channels at the intercalated disk of cardiomyocytes depends on Ankyrin G and is clinically relevant since KATP channel mutations affect Na+ channel expression.
    1. Neuroscience

    BAD and KATP channels regulate neuron excitability and epileptiform activity

    Juan Ramón Martínez-François, María Carmen Fernández-Agüera ... Gary Yellen
    Altered activity of ATP-sensitive K+ channels underlies the metabolic seizure resistance produced by genetic manipulation of the BAD protein in mice.
    1. Neuroscience

    Early dysfunction and progressive degeneration of the subthalamic nucleus in mouse models of Huntington's disease

    Jeremy F Atherton, Eileen L McIver ... Mark D Bevan
    In mouse models of Huntington's disease, the subthalamic nucleus, which suppresses movements, also exhibits impaired glutamate homeostasis, NMDA receptor-dependent mitochondrial oxidant stress, firing disruption, and 30% neuronal loss.
    1. Computational and Systems Biology
    2. Physics of Living Systems

    β-cell intrinsic dynamics rather than gap junction structure dictates subpopulations in the islet functional network

    Jennifer K Briggs, Anne Gresch ... Richard KP Benninger
    The functional network of β-cells in the pancreatic islet, which has been used to identify important subpopulations of β-cells implicated in diabetes progression, is indicative of intrinsic dynamics rather than structural communication, implying islet robustness.
    1. Cell Biology

    Local activation of focal adhesion kinase orchestrates the positioning of presynaptic scaffold proteins and Ca2+ signalling to control glucose-dependent insulin secretion

    Dillon Jevon, Kylie Deng ... Peter Thorn
    The essential role of focal adhesion kinase in locally regulating insulin secretion and calcium responses in pancreatic beta cells is identified through the use of the pancreatic slice technique.
    1. Neuroscience

    Distinct signatures of calcium activity in brain mural cells

    Chaim Glück, Kim David Ferrari ... Bruno Weber
    Increases of extracellular potassium silence capillary pericyte calcium signaling, suggesting a participation of capillary pericytes in the potassium-mediated neurovascular communication.
    1. Structural Biology and Molecular Biophysics

    Mechanism of pharmacochaperoning in a mammalian KATP channel revealed by cryo-EM

    Gregory M Martin, Min Woo Sung ... Show-Ling Shyng
    Diverse KATP channel inhibitors occupy a common binding pocket and stabilize an interaction between Kir6.2 and SUR1 to allosterically control gating and promote the assembly and trafficking of nascent channels.

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