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

    Glutathione binding to the plant AtAtm3 transporter and implications for the conformational coupling of ABC transporters

    Chengcheng Fan, Douglas C Rees
    Multiple cryo-electron microscopy structures of a plant ABC transporter exporting glutathione derivatives captured a closed conformation proposed to enforce the export directionality, while a complex central to the coupling mechanism containing both glutathione and closed nucleotide binding domains remains elusive.
    1. Structural Biology and Molecular Biophysics

    Structure of MlaFB uncovers novel mechanisms of ABC transporter regulation

    Ljuvica R Kolich, Ya-Ting Chang ... Damian C Ekiert
    Structure of MlaFB reveals how a small binding protein and the C-terminal tail on an ATPase subunit work together to regulate the assembly and function of an ABC transporter.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Conformational dynamics of the nucleotide binding domains and the power stroke of a heterodimeric ABC transporter

    Smriti Mishra, Brandy Verhalen ... Hassane S Mchaourab
    The conformational cycle of an ABC heterodimeric transporter reveals a divergence in the structural mechanism of ABC exporters.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Functional and structural characterization of an ECF-type ABC transporter for vitamin B12

    Joana A Santos, Stephan Rempel ... Dirk J Slotboom
    ECF-CbrT is a bacterial vitamin B12 transporter that is structurally different from the well-characterized transporter BtuCDF, yet has similar functional properties.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Characterization of the ABC methionine transporter from Neisseria meningitidis reveals that lipidated MetQ is required for interaction

    Naima G Sharaf, Mona Shahgholi ... Douglas C Rees
    NmMetQ is a lipoprotein that tethers to membranes via a lipid anchor and has dual function and localization, playing a role in NmMetNI-mediated transport at the inner membrane and moonlighting on the bacterial surface.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    A single power stroke by ATP binding drives substrate translocation in a heterodimeric ABC transporter

    Erich Stefan, Susanne Hofmann, Robert Tampé
    Single-turnover studies reveal quantitative insights into the inner mechanics and unfold hidden facets in the conformational coupling of ATP binding, hydrolysis, and substrate translocation by ABC transporters.
    1. Biochemistry and Chemical Biology

    De novo macrocyclic peptides dissect energy coupling of a heterodimeric ABC transporter by multimode allosteric inhibition

    Erich Stefan, Richard Obexer ... Robert Tampé
    By random nonstandard peptide integrated discovery, combinatorial macrocyclic peptides were leavaged that target a heterodimeric ABC transport complex and explore fundamental principles of the substrate translocation cycle.
    1. Structural Biology and Molecular Biophysics

    Structural basis of substrate recognition by a polypeptide processing and secretion transporter

    Virapat Kieuvongngam, Paul Dominic B Olinares ... Jue Chen
    Cryo-EM structure of a peptidase-containing ABC transporter in complex with its protein substrate reveals a mechanism of coupling substrate cleavage to translocation.
    1. Structural Biology and Molecular Biophysics

    Structure of bacterial phospholipid transporter MlaFEDB with substrate bound

    Nicolas Coudray, Georgia L Isom ... Damian C Ekiert
    Structure of MlaFEDB ABC transporter with substrate bound in the outward-open pocket of MlaE provides mechanistic insights into lipid transport within the Gram-negative bacterial cell envelope.
    1. Structural Biology and Molecular Biophysics

    Characterization of the kinetic cycle of an ABC transporter by single-molecule and cryo-EM analyses

    Ling Wang, Zachary Lee Johnson ... Shixin Liu
    The conformational dynamics of multidrug resistance protein 1 (MRP1) are tracked in real time by single-molecule fluorescence resonance energy transfer experiments, which elucidate the rate-limiting mechanism of MRP1's transport cycle.

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