4,567 results found
    1. Structural Biology and Molecular Biophysics

    Voltage-dependent dynamics of the BK channel cytosolic gating ring are coupled to the membrane-embedded voltage sensor

    Pablo Miranda, Miguel Holmgren, Teresa Giraldez
    Allosteric modulation of BK channels, vital for the physiology of nerve, muscle and endocrine cells, is determined by direct coupling between gating ring RCK1 domains and the voltage sensor function.
    1. Structural Biology and Molecular Biophysics
    2. Neuroscience

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

    Grégory Verdon, SeCheol Oh ... Olga Boudker
    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

    Active tactile discrimination is coupled with and modulated by the cardiac cycle

    Alejandro Galvez-Pol, Pavandeep Virdee ... James Kilner
    Human subjects actively adjust the acquisition of sense data based on how their bodily cycles alter their senses, i.e., sensing tactile stimuli for longer periods when concurrent physiological signals are present vs. sensing for shorter periods when these are quiescent.
    1. Structural Biology and Molecular Biophysics

    The mechanism of mammalian proton-coupled peptide transporters

    Simon M Lichtinger, Joanne L Parker ... Philip C Biggin
    The manner in which protons control the conformational behaviour of mammalian peptide transporters is revealed through state-of-the-art molecular dynamics simulations supported by cell-based assays.
    1. Structural Biology and Molecular Biophysics

    Large domain movements through the lipid bilayer mediate substrate release and inhibition of glutamate transporters

    Xiaoyu Wang, Olga Boudker
    Substrate releasing or inhibitor binding on the intracellular side of a glutamate transporter homologue require movements of the transport domain through the lipid membrane, which undergoes adaptive deformations.
    1. Structural Biology and Molecular Biophysics

    Mobile barrier mechanisms for Na+-coupled symport in an MFS sugar transporter

    Parameswaran Hariharan, Yuqi Shi ... Lan Guan
    The use of a conformation-selective inhibitory nanobody provides critical information on MelB at a low-sugar affinity inward-facing Na+-bound state for establishing the mobile barrier and substrate-releasing mechanisms.
    1. Structural Biology and Molecular Biophysics

    Agonist efficiency links binding and gating in a nicotinic receptor

    Dinesh C Indurthi, Anthony Auerbach
    Efficiency measures the fundamental link between agonist binding and protein conformational change, and in nicotinic receptors has 5 values that calibrate energy changes in the induced fit that triggers activation.
    1. Neuroscience
    2. Physics of Living Systems

    Nested mechanosensory feedback actively damps visually guided head movements in Drosophila

    Benjamin Cellini, Jean-Michel Mongeau
    Motor context and mechanosensory feedback together influence how flies control head movements during visually guided flight maneuvers.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Molecular basis of the PIP2-dependent regulation of CaV2.2 channel and its modulation by CaV β subunits

    Cheon-Gyu Park, Wookyung Yu, Byung-Chang Suh
    The anchoring properties of CaV β2 subunits to the plasma membrane determine the biophysical states of CaV2.2 channels by regulating PIP2 coupling to the nonspecific phospholipid-binding site in the I–II loop.

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