498 results found
    1. Genetics and Genomics

    aCPSF1 cooperates with terminator U-tract to dictate archaeal transcription termination efficacy

    Jie Li, Lei Yue ... Xiuzhu Dong
    Term-seq, genetic and biochemical experiments reveal that the trans-action factor aCPSF1 and the terminator U-tract cis-element work in a noteworthy two-in-one termination mode in archaea, and may represent an archetypal mode of the eukaryotic RNA polymerase II termination machinery.
    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. Genetics and Genomics

    Codon usage biases co-evolve with transcription termination machinery to suppress premature cleavage and polyadenylation

    Zhipeng Zhou, Yunkun Dang ... Yi Liu
    Genetic and bioinformatic analyses uncover an unexpected role for codon usage biases in regulating gene expression at the transcriptional level by suppressing premature transcription termination.
    1. Genetics and Genomics

    Unraveling the influences of sequence and position on yeast uORF activity using massively parallel reporter systems and machine learning

    Gemma E May, Christina Akirtava ... Joel McManus
    The regulatory role of thousands of upstream open-reading frames were measured and used to determine the relative influences of sequence, structural, and positional features on translation regulation and nonsense-mediated decay.
    1. Computational and Systems Biology
    2. Physics of Living Systems

    First-principles model of optimal translation factors stoichiometry

    Jean-Benoît Lalanne, Gene-Wei Li
    A parsimonious biophysical model correctly predicts the conserved expression stoichiometry of core bacterial mRNA translation factors, providing intuitive and quantitative design principles for in vivo pathway construction.
    1. Genetics and Genomics
    2. Microbiology and Infectious Disease

    Organisms with alternative genetic codes resolve unassigned codons via mistranslation and ribosomal rescue

    Natalie Jing Ma, Colin F Hemez ... Farren J Isaacs
    Cells resolve unassigned codons with near-cognate suppression, frameshifting, and ribosomal rescue mechanisms, demonstrating that unassigned codons are permissible in both natural and engineered genetic codes as barriers to horizontal gene transfer.
    1. Chromosomes and Gene Expression

    Nonsense mRNA suppression via nonstop decay

    Joshua A Arribere, Andrew Z Fire
    Nonstop mRNA decay degrades mRNAs with a premature stop codon after such mRNAs are targeted by the nonsense-mediated decay machinery.
    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
    2. Structural Biology and Molecular Biophysics

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

    Jesper Pallesen, Yaser Hashem ... Joachim Frank
    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. Chromosomes and Gene Expression
    2. Genetics and Genomics

    Bidirectional promoter activity from expression cassettes can drive off-target repression of neighboring gene translation

    Emily Nicole Powers, Charlene Chan ... Gloria Ann Brar
    Bidirectional promoter activity, which is inherent to the promoters of selection cassettes used for genome editing, causes divergent transcription that can disrupt expression of genes neighboring cassette insertion sites, causing potent off-target effects.

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