191 results found
    1. Cell Biology
    2. Neuroscience

    Phosphatidylinositol 4,5-bisphosphate optical uncaging potentiates exocytosis

    Alexander M Walter, Rainer Müller ... Jakob Balslev Sørensen
    Increasing PI(4,5)P2 on a sub-second timescale using a novel, membrane-permeant UV activatable PI(4,5)P2 molecule augments exocytosis which requires the PI(4,5)P2 interacting exocytotic proteins Munc13-2 and synaptotagmin-1.
    1. Neuroscience

    α-Synuclein plasma membrane localization correlates with cellular phosphatidylinositol polyphosphate levels

    Reeba Susan Jacob, Cédric Eichmann ... Philipp Selenko
    Plasma membrane clusters of the Parkinson's disease protein α-synuclein colocalize with negatively charged phospholipids involved in endocytosis and exocytosis.
    1. Neuroscience
    2. Structural Biology and Molecular Biophysics

    Ca2+-dependent release of synaptotagmin-1 from the SNARE complex on phosphatidylinositol 4,5-bisphosphate-containing membranes

    Rashmi Voleti, Klaudia Jaczynska, Josep Rizo
    Ca2+-free synaptotagmin-1 binds to neuronal SNARE complexes anchored on nanodiscs, and Ca2+ releases this interaction to induce tight, specific binding to PIP2-containing membranes.
    1. Structural Biology and Molecular Biophysics

    Phosphoinositide-mediated oligomerization of a defensin induces cell lysis

    Ivan KH Poon, Amy A Baxter ... Mark D Hulett
    A novel innate defense mechanism of cell lysis involves the coordinated oligomerization of a defensin by interaction with the membrane lipid, phosphatidylinositol 4,5-bisphosphate.
    1. Cell Biology

    Bilateral regulation of EGFR activity and local PI(4,5)P2 dynamics in mammalian cells observed with superresolution microscopy

    Mitsuhiro Abe, Masataka Yanagawa ... Yasushi Sako
    The local PI(4,5)P2 nanodomain promotes the dimerization and activation of EGFR in the plasma membrane, whereas activated EGFR dissolves the nanodomain structure of PI(4,5)P2 through PLCγ.
    1. Cell Biology

    Meisosomes, folded membrane microdomains between the apical extracellular matrix and epidermis

    Dina Aggad, Nicolas Brouilly ... Nathalie Pujol
    Combining live imaging and advanced electron microscopy gives insights into the structural integrity of the nematode epidermis and its intimate connection with the extracellular matrix.
    1. Structural Biology and Molecular Biophysics

    Inhibition of the proton-activated chloride channel PAC by PIP2

    Ljubica Mihaljević, Zheng Ruan ... Zhaozhu Qiu
    PIP2 inhibits the proton-activated chloride (PAC) channel by selectively stabilizing its desensitized state.
    1. Structural Biology and Molecular Biophysics

    Structural mechanisms of phospholipid activation of the human TPC2 channel

    Ji She, Weizhong Zeng ... Youxing Jiang
    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. Neuroscience

    A positive feedback loop between Flower and PI(4,5)P2 at periactive zones controls bulk endocytosis in Drosophila

    Tsai-Ning Li, Yu-Jung Chen ... Chi-Kuang Yao
    The interplay between the Flower Ca2+ channel and PI(4,5)P2 spatiotemporally couples synaptic vesicle exocytosis to activity-dependent bulk endocytosis and synaptic vesicle reformation from bulk endosomes.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Key steps in unconventional secretion of fibroblast growth factor 2 reconstituted with purified components

    Julia P Steringer, Sascha Lange ... Walter Nickel
    The first reconstitution of an unconventional secretory mechanism uncovered the molecular mechanism by which Fibroblast Growth Factor 2 is secreted from mammalian cells.

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