335 results found
    1. Structural Biology and Molecular Biophysics

    Molecular basis of signaling specificity between GIRK channels and GPCRs

    Kouki K Touhara, Roderick MacKinnon
    A single kinetic step in the G protein activation cycle determines whether a G protein-coupled receptor activates G protein-gated K+ channels or not.
    1. Neuroscience

    RGS7/Gβ5/R7BP complex regulates synaptic plasticity and memory by modulating hippocampal GABABR-GIRK signaling

    Olga Ostrovskaya et al.
    A critical regulator of inhibitory neurotransmitter signaling in the hippocampus has been identified in experiments on mice and been shown to play essential role in synaptic plasticity and memory.
    1. Structural Biology and Molecular Biophysics

    Cryo-EM analysis of PIP2 regulation in mammalian GIRK channels

    Yiming Niu et al.
    The structural role of PIP2 in opening the G-protein-gated K+ channel is revealed.
    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. 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. Biochemistry and Chemical Biology
    2. Cancer Biology

    Reproducibility in Cancer Biology: Getting to grips with c-Myc

    Dirk Eick
    The transcription factor c-Myc amplifies the transcription of many growth-related genes in cancer cells, but its role as an oncogene is not fully understood.
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    1. Structural Biology and Molecular Biophysics

    Ion Channels: Solving a specificity mystery

    Sanduo Zheng, Andrew C Kruse
    Differences in the kinetics of G protein activation can explain why only some receptors can activate potassium ion channels called GIRKs.
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    1. Developmental Biology

    Cell Competition: Counting the Minutes

    Stephano Mello, Dirk Bohmann
    A newly discovered mechanism that causes the 'Minute' phenotype in fruit flies can explain how organisms are able to eliminate the mutant cells that arise occasionally during development.
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    1. Neuroscience

    Cellular and neurochemical basis of sleep stages in the thalamocortical network

    Giri P Krishnan et al.
    A computational model of the thalamocortical network explains sleep stages by the coordinated variations in the level of neuromodulators and predicts differences of sleep pattern in human, cat and mouse recordings.

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