1,072 results found
    1. Chromosomes and Gene Expression

    Ribosome recycling is not critical for translational coupling in Escherichia coli

    Kazuki Saito, Rachel Green, Allen R Buskirk
    Without ribosome recycling factor, ribosomes in Escherichia coli accumulate in 3'-UTRs and queue upstream of stop codons, but no effects were observed on the translational coupling of neighboring genes.
    1. Genetics and Genomics

    Reprogramming of translation in yeast cells impaired for ribosome recycling favors short, efficiently translated mRNAs

    Swati Gaikwad, Fardin Ghobakhlou ... Alan G Hinnebusch
    A mutant impaired for ribosome recycling exhibits translational reprogramming wherein strong mRNAs outcompete weak mRNAs, also observed when preinitiation complexes are diminished by eIF2α phosphorylation or 40S ribosomal subunit depletion.
    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.
    1. Cell Biology

    Ribosome collisions trigger cis-acting feedback inhibition of translation initiation

    Szymon Juszkiewicz, Greg Slodkowicz ... Ramanujan S Hegde
    Ribosome collisions along an mRNA are shown to recruit factors that prevent additional ribosomes from initiating translation on that mRNA, thereby providing time to resolve the collision.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Ensemble cryo-EM uncovers inchworm-like translocation of a viral IRES through the ribosome

    Priyanka D Abeyrathne, Cha San Koh ... Andrei A Korostelev
    An ensemble of cryo-EM structures reveals how eukaryotic elongation factor 2 positions the first codon of a viral mRNA for translation.
    1. Biochemistry and Chemical Biology

    The ribosomal protein Asc1/RACK1 is required for efficient translation of short mRNAs

    Mary K Thompson, Maria F Rojas-Duran ... Wendy V Gilbert
    Asc1/RACK1 promotes the translation of mRNAs associated with the translational closed loop complex, which have short open reading frames and encode proteins required for core metabolic processes.
    1. Biochemistry and Chemical Biology
    2. Physics of Living Systems

    Direct measurement of the mechanical work during translocation by the ribosome

    Tingting Liu, Ariel Kaplan ... Carlos J Bustamante
    ‘Optical tweezers’ measurements of single ribosomes and single mRNA molecules show that the translation rate depends exponentially on the applied force, and suggests that the ribosome functions as a Brownian ratchet.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural characterization of ribosome recruitment and translocation by type IV IRES

    Jason Murray, Christos G Savva ... Israel S Fernández
    A Internal Ribosomal Entry Site RNA has been visualised by high resolution cryoEM, trapped in the ribosome in an intermediate state of translocation.
    1. Cell Biology
    2. Chromosomes and Gene Expression

    Dedicated chaperones coordinate co-translational regulation of ribosomal protein production with ribosome assembly to preserve proteostasis

    Benjamin Pillet, Alfonso Méndez-Godoy ... Dieter Kressler
    A novel co-translational mechanism continuously adjusts the expression levels of ribosomal proteins Rpl3 and Rpl4 to their consumption during ribosome synthesis by regulating the abundance of their mRNAs.
    1. Chromosomes and Gene Expression
    2. Neuroscience

    Activation of GCN2 kinase by ribosome stalling links translation elongation with translation initiation

    Ryuta Ishimura, Gabor Nagy ... Susan L Ackerman
    Activation of the integrated stress response by stalled translation elongation complexes attenuates neurodegeneration, and demonstrates a protective link between a decrease in the rate of translation initiation and defects in translation elongation.

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