6,296 results found
    1. Structural Biology and Molecular Biophysics

    Calcium-dependent electrostatic control of anion access to the pore of the calcium-activated chloride channel TMEM16A

    Andy KM Lam, Raimund Dutzler
    Ion conduction in the calcium-activated chloride channel TMEM16A is directly regulated by calcium, which binds to a site close to the pore thereby shaping the electrostatics at its intracellular entrance.
    1. Cell Biology
    2. Human Biology and Medicine

    Intracellular sphingosine releases calcium from lysosomes

    Doris Höglinger et al.
    Sphingosine acts as a lipid messenger molecule in intracellular signaling networks that are relevant to lysosomal function and Niemann-Pick disease.
    1. Structural Biology and Molecular Biophysics

    Structural mechanisms of phospholipid activation of the human TPC2 channel

    Ji She et al.
    Cryo-EM structures of human TPC2 channel in the ligand-bound and apo states reveal the structural mechanism of PI(3,5)P2 lipid regulated gating of TPC2.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    MCU encodes the pore conducting mitochondrial calcium currents

    Dipayan Chaudhuri et al.
    Genetic and electrophysiological experiments reveal that a gene called MCU encodes the ion channel pore that allows calcium ions to cross the inner mitochondrial membrane.
    1. Computational and Systems Biology
    2. Immunology and Inflammation

    Affinity and dose of TCR engagement yield proportional enhancer and gene activity in CD4+ T cells

    Karmel A Allison et al.
    Pre-existing enhancers interpret T cell signaling strength in an analogue manner to direct quantitative changes in gene expression within the context of an overall digital response.
    1. Microbiology and Infectious Disease

    RNA virus attenuation by codon pair deoptimisation is an artefact of increases in CpG/UpA dinucleotide frequencies

    Fiona Tulloch et al.
    Attenuating candidate live virus vaccines by incorporating unfavoured codon pairs to reduce translation efficiency is actually mediated though changes in frequencies of CpG and UpA dinucleotides, which make viruses more visible to the innate immune system.
    1. Neuroscience

    A valve-like mechanism controls desensitization of functional mammalian isoforms of acid-sensing ion channels

    Yangyu Wu et al.
    Three residues work together as a valve-like mechanism to control desensitization from pre-open and open states in the ion channels ASIC1a, ASIC2a, and ASIC3.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Obligate coupling of CFTR pore opening to tight nucleotide-binding domain dimerization

    Csaba Mihályi et al.
    Coupling of CFTR pore opening to nucleotide binding domain dimerization does not depend on ATP binding, but is an inherent property of the channel protein and likely other ABC transporters.
    1. Neuroscience

    Gi/o protein-coupled receptors in dopamine neurons inhibit the sodium leak channel NALCN

    Fabian Philippart, Zayd M Khaliq
    The sodium leak NALCN channel functions as a core effector of GABA-B and D2 receptors that is used along with GIRK channels to regulate action potential firing in dopamine neurons.
    1. Structural Biology and Molecular Biophysics

    ML277 specifically enhances the fully activated open state of KCNQ1 by modulating VSD-pore coupling

    Panpan Hou et al.
    ML277 exclusively enhances the AO state voltage-sensing domain (VSD)-pore coupling of KCNQ1 channels, providing an effective tool to investigate the voltge-dependent gating and new strategies for treating long QT syndrome.

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