103 results found
    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
    2. Structural Biology and Molecular Biophysics

    Dual tRNA mimicry in the Cricket Paralysis Virus IRES uncovers an unexpected similarity with the Hepatitis C Virus IRES

    Vera P Pisareva, Andrey V Pisarev, Israel S Fernández
    A conformational change in the Cricket Paralysis Virus IRES upon double translocation in the ribosome uncovers an unexpected similarity with the Hepatitis C Virus IRES.
    1. Biochemistry and Chemical Biology

    Kinetics of initiating polypeptide elongation in an IRES-dependent system

    Haibo Zhang, Martin Y Ng ... Barry S Cooperman
    The retarding effect of a ribosome-bound internal ribosome entry site on eukaryotic protein synthesis is largely overcome following translocation of tripeptidyl-tRNA.
    1. Biochemistry and Chemical Biology

    A dynamic RNA loop in an IRES affects multiple steps of elongation factor-mediated translation initiation

    Marisa D Ruehle, Haibo Zhang ... Jeffrey S Kieft
    During initiation factor-independent RNA structure-driven translation initiation, a flexible RNA element drives the movement of a viral IRES through the ribosome's tRNA binding sites and promotes tRNA binding.
    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. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    Translation initiation by the hepatitis C virus IRES requires eIF1A and ribosomal complex remodeling

    Zane A Jaafar, Akihiro Oguro ... Jeffrey S Kieft
    The hepatitis C virus IRES binds and remodels preassembled eukaryotic translation preinitiation complexes, using specific initiation factor protein within a "bacterial-like" mode of initiation that can function in both stressed and unstressed cells.
    1. Genetics and Genomics

    Yeast eIF2A has a minimal role in translation initiation and uORF-mediated translational control in vivo

    Swati Gaikwad, Fardin Ghobakhlou ... Alan G Hinnebusch
    Eliminating eukaryotic initiation factor 2 (eIF2) from wild-type budding yeast had little impact on translation of individual mRNAs, including those with regulatory upstream open-reading frames, even when canonical initiation factor eIF2 activity was impaired.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Translation inhibitory elements from Hoxa3 and Hoxa11 mRNAs use uORFs for translation inhibition

    Fatima Alghoul, Schaeffer Laure ... Franck Martin
    Hoxa3 and Hoxa11 translation inhibitory elements block cap-dependent translation by using upstream open reading frames with distinct modes of action.
    1. Cell Biology
    2. Chromosomes and Gene Expression

    Long non-coding RNA Neat1 and paraspeckle components are translational regulators in hypoxia

    Anne-Claire Godet, Emilie Roussel ... Anne-Catherine Prats
    LncRNA Neat1, with paraspeckle proteins, controls translational induction of (lymph)angiogenic and cardioprotective factors by the IRES-dependent mechanism in mouse cardiomyocytes submitted to hypoxia.
    1. Neuroscience
    2. Structural Biology and Molecular Biophysics

    TMEM120A contains a specific coenzyme A-binding site and might not mediate poking- or stretch-induced channel activities in cells

    Yao Rong, Jinghui Jiang ... Zhenfeng Liu
    Electrophysiological and structural characterizations reveal that a previously proposed ion channel responsible for sensing mechanical pain is insensitive to poking or stretching stimuli for conducting ions and may serve as a coenzyme A-binding protein instead.

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