23 results found
    1. Structural Biology and Molecular Biophysics

    Cryo-EM structures of the caspase-activated protein XKR9 involved in apoptotic lipid scrambling

    Monique S Straub et al.
    The cryo-EM structures of XKR9 define the architecture and caspase-mediated activation of a protein family that is involved in the exposure of phosphatidylserine during apoptosis leading to the engulfment of apoptotic cells by macrophages.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    Identification of a lipid scrambling domain in ANO6/TMEM16F

    Kuai Yu et al.
    The amino acids that are necessary for phospholipid scrambling by ANO6/TMEM16F can, via domain swapping, confer scrambling activity to the chloride ion channel ANO1 that normally does not scramble phospholipids.
    1. Structural Biology and Molecular Biophysics

    Cryo-EM structures and functional characterization of the murine lipid scramblase TMEM16F

    Carolina Alvadia et al.
    While activated by a common mechanism, both functions in TMEM16F - lipid scrambling and ion conduction - are likely mediated by alternate protein conformations that are at equilibrium in the ligand-bound state.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Stepwise activation mechanism of the scramblase nhTMEM16 revealed by cryo-EM

    Valeria Kalienkova et al.
    cryo-EM reveals the properties of distinct conformations occupied during activation of the lipid scramblase nhTMEM16 and provides new insights into its interactions with the lipid environment.
    1. Structural Biology and Molecular Biophysics
    2. Computational and Systems Biology

    Lipids and ions traverse the membrane by the same physical pathway in the nhTMEM16 scramblase

    Tao Jiang et al.
    A concerted approach employing equilibrium and biased molecular simulations, electrophysiology, mutagenesis, and functional assays reveals, in atomic details, the mechanism and pathway for transport of phospholipids and ions by a lipid scramblase.
    1. Neuroscience
    2. Structural Biology and Molecular Biophysics

    Dynamic change of electrostatic field in TMEM16F permeation pathway shifts its ion selectivity

    Wenlei Ye et al.
    TMEM16F shifts its ion selectivity in response to change of intracellular Ca2+, membrane potential and ionic strength.
    1. Structural Biology and Molecular Biophysics

    Structural basis of Ca2+-dependent activation and lipid transport by a TMEM16 scramblase

    Maria E Falzone et al.
    Structures of a TMEM16 phospholipid scramblase reveal that its Ca2+-dependent activation entails global conformational changes and how these rearrangements affect the membrane to enable transbilayer lipid transfer.
    1. Cell Biology
    2. Chromosomes and Gene Expression

    Cytoplasmic mRNA decay represses RNA polymerase II transcription during early apoptosis

    Christopher Duncan-Lewis et al.
    Human cells respond to cytoplasmic mRNA depletion during early apoptosis by inhibiting RNA polymerase II transcription, thereby magnifying the gene expression shutdown during stress.
    1. Structural Biology and Molecular Biophysics

    Aromatic interactions with membrane modulate human BK channel activation

    Mahdieh Yazdani et al.
    Computation and experiment together demonstrate that nonspecific membrane–protein interactions could regulate transmembrane protein function and suggest that covalent linkers can be an integral component of the sensing apparatus.
    1. Evolutionary Biology

    Membranes, energetics, and evolution across the prokaryote-eukaryote divide

    Michael Lynch, Georgi K Marinov
    The common view that the mitochondrion endowed eukaryotes with a boost in bioenergetic capacity above that in prokaryotes is inconsistent with a diversity of cellular features.

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