1,314 results found
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structures in multiple conformations reveal distinct transition metal and proton pathways in an Nramp transporter

    Aaron T Bozzi et al.
    Nramp-family transporters adapt a common fold to a novel mechanism in which the spatial and temporal separation of like-charge transition metal and proton co-substrates circumvents the expected electrostatic repulsion.
    1. Structural Biology and Molecular Biophysics

    Folding behavior of a T-shaped, ribosome-binding translation enhancer implicated in a wide-spread conformational switch

    My-Tra Le et al.
    Folding and unfolding pathways are described for a ribosome-binding 3' cap-independent translation enhancer at the center of a conformational rearrangement that is implicated in the transition from translation to replication of an RNA virus.
    1. Structural Biology and Molecular Biophysics
    2. Computational and Systems Biology

    The selectivity of the Na+/K+-pump is controlled by binding site protonation and self-correcting occlusion

    Huan Rui et al.
    Computations based on detailed atomic models explain how the ATP-driven sodium-potassium pump avoids transporting the wrong type of ions in order to maintain the physiological concentration of sodium and potassium ions across the cell membrane.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Cryo-EM visualization of the ribosome in termination complex with apo-RF3 and RF1

    Jesper Pallesen et al.
    Cryo-electron microscopy has been used to provide a structural interpretation of the complete action cycle of release factor 3 during translation termination, which includes a coordinated sequence of interactions with a class-I release factor and the ribosome.
    1. Computational and Systems Biology
    2. Structural Biology and Molecular Biophysics

    Free-energy simulations reveal molecular mechanism for functional switch of a DNA helicase

    Wen Ma et al.
    Integration of structural bioinformatics and free-energy simulations reveals how a helicase switches its function from unwinding to rezipping DNA, during which a key metastable conformation is predicted and verified by single-molecule measurements.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Dynamics of ribosomes and release factors during translation termination in E. coli

    Sarah Adio et al.
    Translation termination is a stochastic process that utilizes loosely coupled motions of its players to complete protein synthesis and release the newly synthesized nascent chain toward its cellular destination.
    1. Biochemistry and Chemical Biology

    eIF1A residues implicated in cancer stabilize translation preinitiation complexes and favor suboptimal initiation sites in yeast

    Pilar Martin-Marcos et al.
    Substitutions in general translation initiation factor eIF1A found as recurring somatic mutations in uveal melanoma destabilize the closed conformation of the preinitiation complex at the start codon and increase discrimination against suboptimal initiation codons genome-wide.
    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 et al.
    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. Structural Biology and Molecular Biophysics

    Real time dynamics of Gating-Related conformational changes in CorA

    Martina Rangl et al.
    High-speed atomic force microscopy reveals that the open state of the divalent ion channel CorA is highly dynamic and defined by the fast exchange between conformations.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Distinct inactive conformations of the dopamine D2 and D3 receptors correspond to different extents of inverse agonism

    J Robert Lane et al.
    The occupation of a sub-pocket near the Na+-binding site in D2R by the Na+-insensitive antagonists is the structural basis for their greater inverse agonism than that of the Na+-sensitive ligands.

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