1,248 results found
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Eukaryotic translation initiation factor 3 plays distinct roles at the mRNA entry and exit channels of the ribosomal preinitiation complex

    Colin Echeverría Aitken et al.
    Eukaryotic translation initiation factor 3 (eIF3) is required to stabilize the binding of mRNA at the exit channel of the small ribosomal subunit and acts at the entry channel to accelerate mRNA recruitment to the translation preinitiation complex.
    1. Chromosomes and Gene Expression
    2. Neuroscience

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

    Ryuta Ishimura et al.
    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.
    1. Biochemistry and Chemical Biology

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

    Marisa D Ruehle et al.
    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

    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. Chromosomes and Gene Expression

    The β-hairpin of 40S exit channel protein Rps5/uS7 promotes efficient and accurate translation initiation in vivo

    Jyothsna Visweswaraiah et al.
    A structural element of mRNA exit channel protein Rps5 performs a critical role in start codon recognition during translation initiation by stabilizing initiator tRNA binding to the pre-initiation complex.
    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 et al.
    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. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Yeast Ded1 promotes 48S translation pre-initiation complex assembly in an mRNA-specific and eIF4F-dependent manner

    Neha Gupta et al.
    Yeast RNA helicase Ded1 stimulates ribosome recruitment of structure-laden native mRNAs in a reconstituted system by interactions between domains in Ded1 and initiation factor eIF4G that stabilizes a Ded1-eIF4F complex.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Fail-safe control of translation initiation by dissociation of eIF2α phosphorylated ternary complexes

    Martin D Jennings et al.
    Phosphorylated translation initiation factor eIF2, a potent inhibitor of protein synthesis in eukaryotic cells, is also inhibitory to protein synthesis when bound to GTP and initiator tRNA broadening the reach and immediacy of eIF2-mediated control.
    1. Cancer Biology
    2. Cell Biology

    The eukaryotic translation initiation factor eIF4E harnesses hyaluronan production to drive its malignant activity

    Hiba Ahmad Zahreddine et al.
    The eukaryotic translation initiation factor eIF4E induces hyaluronic acid (HA) synthesis to drive cancer metastasis which can be reversed following eIF4E inhibition and HA degradation.
    1. Chromosomes and Gene Expression
    2. Genetics and Genomics

    Non-invasive measurement of mRNA decay reveals translation initiation as the major determinant of mRNA stability

    Leon Y Chan et al.
    Non-invasive mRNA stability measurements reveal that transcript lifetime is governed by a competition with translation initiation on a transcriptome-wide level.

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