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

    Visualizing formation of the active site in the mitochondrial ribosome

    Viswanathan Chandrasekaran, Nirupa Desai ... V Ramakrishnan
    GTPBP7, NSUN4, and MTERF4 facilitate maturation of the peptidyl transferase center of the mitochondrial ribosome.
    1. Cell Biology
    2. Structural Biology and Molecular Biophysics

    Extensive ribosome and RF2 rearrangements during translation termination

    Egor Svidritskiy, Gabriel Demo ... Andrei A Korostelev
    Ensemble cryo-EM visualizes how structural rearrangements poise the newly made protein and release factor RF2 to dissociate in preparation for ribosome recycling.
    1. Biochemistry and Chemical Biology

    The GTPase Nog1 co-ordinates the assembly, maturation and quality control of distant ribosomal functional centers

    Purnima Klingauf-Nerurkar, Ludovic C Gillet ... Vikram G Panse
    The GTPase Nog1 orchestrates stalk assembly, peptidyl transferase centre maturation and polypeptide exit tunnel quality control.
    1. Structural Biology and Molecular Biophysics

    Mechanisms of ribosome stalling by SecM at multiple elongation steps

    Jun Zhang, Xijiang Pan ... Sen-Fang Sui
    Nascent regulatory peptides tune the translation rate through a continuous, dynamic reshaping of the functional center of the ribosome.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Directed evolution of the rRNA methylating enzyme Cfr reveals molecular basis of antibiotic resistance

    Kaitlyn Tsai, Vanja Stojković ... Danica Galonić Fujimori
    Directed evolution of the resistance enzyme Cfr under antibiotic selection identifies increased Cfr expression and stability as strategies to boost resistance and reveals that Cfr modification of the ribosome confers resistance by sterically occluding binding of antibiotics.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    In vitro analysis of RQC activities provides insights into the mechanism and function of CAT tailing

    Beatriz A Osuna, Conor J Howard ... David E Weinberg
    Yeast extracts recapitulate a quality-control pathway dedicated to rescuing stalled ribosomes, providing unexpected insights into a noncanonical elongation reaction and the fate of incompletely synthesized proteins.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Mechanism of ribosome rescue by ArfA and RF2

    Gabriel Demo, Egor Svidritskiy ... Andrei A Korostelev
    Cryo-EM structures reveal the structural dynamics of ArfA*RF2-mediated rescue of stalled ribosomes.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    A systematically-revised ribosome profiling method for bacteria reveals pauses at single-codon resolution

    Fuad Mohammad, Rachel Green, Allen R Buskirk
    With the removal of confounding artifacts, ribosome profiling can yield insight into the mechanism of protein synthesis in bacteria at high resolution.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural and mutational analysis of the ribosome-arresting human XBP1u

    Vivekanandan Shanmuganathan, Nina Schiller ... Roland Beckmann
    Two integrated approaches shed light on how XBP1 arrest peptide induces intermediate level of translational pausing and identify hotspot positions to make it stronger.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Distinct stages of the translation elongation cycle revealed by sequencing ribosome-protected mRNA fragments

    Liana F Lareau, Dustin H Hite ... Patrick O Brown
    The size of the mRNA fragment protected by a ribosome depends on the ribosome's conformation, which enables studies of the distinct steps of decoding and translocation at single-codon resolution.

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