845 results found
    1. Structural Biology and Molecular Biophysics

    Binding and transport of D-aspartate by the glutamate transporter homolog GltTk

    Valentina Arkhipova et al.
    Glutamate transporter homologs can efficiently bind and transport both L- and D- enantiomeric substrates with only slight rearrangements in the binding site.
    1. Neuroscience
    2. Structural Biology and Molecular Biophysics

    The dual role of chloride in synaptic vesicle glutamate transport

    Roger Chang et al.
    Whole endosome recording shows that chloride interacts with vesicular glutamate transporters as both allosteric activator and permeant ion, and although the mode of permeation differs, chloride and glutamate use a related conduction pathway.
    1. Structural Biology and Molecular Biophysics

    Cryo-EM structures of the human glutamine transporter SLC1A5 (ASCT2) in the outward-facing conformation

    Xiaodi Yu et al.
    Cryo-EM structures of unliganded SLC1A5 and its complex with glutamine in outward-facing state provide insights into the substrate specificity and transport mechanism and will be helpful for developing selective inhibitors.
    1. Structural Biology and Molecular Biophysics
    2. Neuroscience

    Coupled ion binding and structural transitions along the transport cycle of glutamate transporters

    Grégory Verdon et al.
    Crystal structures of an archaeal homologue of mammalian glutamate transporters in apo and ion-only bound outward- and inward-facing states reveal ion-coupled conformational changes supporting mechanisms of coupling, gating, and transport.
    1. Structural Biology and Molecular Biophysics

    Kinetic mechanism of coupled binding in sodium-aspartate symporter GltPh

    SeCheol Oh, Olga Boudker
    Sodium ions control the rates of both substrate binding and dissociation of an archaeal homologue of glutamate transporters in a manner that minimizes binding intermediates and maximizes transport efficiency.
    1. Neuroscience

    Effects of fluorescent glutamate indicators on neurotransmitter diffusion and uptake

    Moritz Armbruster et al.
    Fluorescent glutamate indicators distort the time course of neurotransmitter diffusion and uptake by competing with transporters, an important caveat to consider when using iGluSnFR and its analogs.
    1. Cell Biology
    2. Neuroscience

    A proline-rich motif on VGLUT1 reduces synaptic vesicle super-pool and spontaneous release frequency

    Xiao Min Zhang et al.
    In mammals, the vesicular glutamate transporter 1 acquired a proline-rich sequence that negatively regulates the spontaneous release of glutamate by reducing the exchange of synaptic vesicles along the axon.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Consensus designs and thermal stability determinants of a human glutamate transporter

    Erica Cirri et al.
    A fast evolutionary approach to engineer membrane protein kinetic stability yields folded excitatory neurotransmitter transporters and provides insights into their denaturing pathway.
    1. Structural Biology and Molecular Biophysics
    2. Computational and Systems Biology

    Substrate transport and anion permeation proceed through distinct pathways in glutamate transporters

    Mary Hongying Cheng et al.
    Novel evidence on the molecular determinants of the dual function, anion permeation and substrate transport, of excitatory amino acid transporters opens avenues toward illuminating how these transporters regulate synaptic function and contribute to neurological conditions.
    1. Cell Biology
    2. Neuroscience

    Presynaptic morphology and vesicular composition determine vesicle dynamics in mouse central synapses

    Laurent Guillaud et al.
    In central synapses, the mobility and supply of synaptic vesicles are determined by two independent biological factors: the morphological and structural organization of nerve terminals and the molecular signature of vesicles.

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