558 results found
    1. Computational and Systems Biology
    2. Neuroscience

    Na+/K+ pump interacts with the h-current to control bursting activity in central pattern generator neurons of leeches

    Daniel Kueh et al.
    The dynamic current generated Na+/K+ pump interacts with the h-current to control the bursting activity of oscillator heart interneurons.
    1. Cell Biology

    Profound regulation of Na/K pump activity by transient elevations of cytoplasmic calcium in murine cardiac myocytes

    Fang-Min Lu et al.
    Transient Ca elevations of cytoplasmic calcium in cardiac myocytes profoundly activate cardiac Na/K pump activity in parallel with physical-chemical changes of the sarcolemma but without involvement of conventional signaling mechanisms.
    1. Structural Biology and Molecular Biophysics
    2. Computational and Systems Biology

    The selectivity of the Na+/K+-pump is controlled by binding site protonation and self-correcting occlusion

    Huan Rui et al.
    Computations based on detailed atomic models explain how the ATP-driven sodium-potassium pump avoids transporting the wrong type of ions in order to maintain the physiological concentration of sodium and potassium ions across the cell membrane.
    1. Computational and Systems Biology
    2. Neuroscience

    Biophysical models reveal the relative importance of transporter proteins and impermeant anions in chloride homeostasis

    Kira M Düsterwald et al.
    Mathematical models with experimental validation show that chloride transporters in the cell membrane, and not negatively charged impermeant molecules, generate the driving force used by GABA receptors to silence neurons.
    1. Neuroscience

    Ionic mechanisms underlying history-dependence of conduction delay in an unmyelinated axon

    Yang Zhang et al.
    Conduction velocity of action potentials in unmyelinated axons depends ultimately on the gating variables of the fast voltage-gated sodium current and can be predicted from the action potential peak and trough voltages.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    Massive palmitoylation-dependent endocytosis during reoxygenation of anoxic cardiac muscle

    Mei-Jung Lin et al.
    Reoxygenation of anoxic cardiac tissue promotes massive endocytosis that is triggered by release of coenzymeA from mitochondria, followed by palmitoylation of membrane proteins, sarcolemma vesiculation, and transfer of sarolemma vesicles to large endosomes and vacuoles.
    1. Structural Biology and Molecular Biophysics

    Structure and mechanism of the Mrp complex, an ancient cation/proton antiporter

    Julia Steiner, Leonid Sazanov
    Structure of the Mrp antiporter, an ancestor of respiratory complex I, suggests a mechanism of coupling between cation and proton translocation, applicable to a large family of related membrane proteins.
    1. Cell Biology
    2. Genetics and Genomics

    A Drosophila screen identifies NKCC1 as a modifier of NGLY1 deficiency

    Dana M Talsness et al.
    An ion transporter is hyperglycosylated and 50% less functional in NGLY1-deficient cells, potentially explaining several symptoms of NGLY1 deficiency such as lack of sweat and tears.
    1. Neuroscience

    Oligodendrocytes control potassium accumulation in white matter and seizure susceptibility

    Valerie A Larson et al.
    Oligodendrocytes in white matter use Kir4.1 inwardly rectifying potassium channels to prevent extracellular potassium accumulation, enabling neurons to sustain repetitive firing and limiting the initiation of seizures.
    1. Biochemistry and Chemical Biology

    Gq activity- and β-arrestin-1 scaffolding-mediated ADGRG2/CFTR coupling are required for male fertility

    Dao-Lai Zhang et al.
    ADGRG2, an orphan GPCR, when coupled to CFTR via a regional Gq signaling on the apical membrane, acts to regulate efferent duct fluid reabsorption making it essential for male fertility.

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