540 results found
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Serine phosphorylation regulates the P-type potassium pump KdpFABC

    Marie E Sweet et al.
    Phosphorylation of a highly conserved serine residue is a physiological response of Escerichia coli to environmental potassium levels that inhibits transport by KdpFABC to maintain cellular homeostasis.
    1. Neuroscience
    2. Structural Biology and Molecular Biophysics

    Control of Slc7a5 sensitivity by the voltage-sensing domain of Kv1 channels

    Shawn M Lamothe et al.
    The voltage-sensing mechanism of a subfamily of potassium channels is modulated in unconventional ways by an amino acid transporter.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Helical jackknives control the gates of the double-pore K+ uptake system KtrAB

    Marina Diskowski et al.
    The K(+) uptake system KtrAB is controlled by an allosteric mechanism entirely new for membrane channels, which operates the channel gate over a 35 Å distance.
    1. Structural Biology and Molecular Biophysics

    Cryo-EM structure of the potassium-chloride cotransporter KCC4 in lipid nanodiscs

    Michelle S Reid et al.
    The structure of the potassium-chloride cotransporter KCC4 provides insight into the basis of ion specificity, transport stoichiometry, and activity regulation for a broadly physiologically and clinically important transporter family.
    1. Cell Biology
    2. Plant Biology

    A receptor-like kinase mutant with absent endodermal diffusion barrier displays selective nutrient homeostasis defects

    Alexandre Pfister et al.
    The SCHENGEN3 protein is needed for the progression of isolated microdomains into a continuous band, which is necessary for the establishment of the major extracellular diffusion barrier in plant roots: the Casparian strip.
    1. Structural Biology and Molecular Biophysics

    Mechanism of pharmacochaperoning in a mammalian KATP channel revealed by cryo-EM

    Gregory M Martin et al.
    Diverse KATP channel inhibitors occupy a common binding pocket and stabilize an interaction between Kir6.2 and SUR1 to allosterically control gating and promote the assembly and trafficking of nascent channels.
    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

    Activation of the archaeal ion channel MthK is exquisitely regulated by temperature

    Yihao Jiang et al.
    Temperature-sensitivity of archaebacterial potassium channel MthK is regulated by RCK domain via alteration of allosteric coupling.
    1. Neuroscience

    A circuit-dependent ROS feedback loop mediates glutamate excitotoxicity to sculpt the Drosophila motor system

    Jhan-Jie Peng et al.
    Glutamate excitotoxicity induces a circuit-dependent ROS feedback loop to alter motor system integrity.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Fluorescent sensors for activity and regulation of the nitrate transceptor CHL1/NRT1.1 and oligopeptide transporters

    Cheng-Hsun Ho, Wolf B Frommer
    Peptide and nitrate transporters have been converted into fluorescent reporters of transport activity and have been used to measure various transport properties including the dual affinity of the nitrate transceptor

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