77 results found
    1. Chromosomes and Gene Expression

    Evidence that Mediator is essential for Pol II transcription, but is not a required component of the preinitiation complex in vivo

    Natalia Petrenko et al.
    Mediator, a transcriptional coactivator complex, is essential for transcription but is not a required component of a functional preinitiation complex, indicating that Mediator is not equivalent to a general transcription factor.
    1. Chromosomes and Gene Expression
    2. Genetics and Genomics

    Requirements for RNA polymerase II preinitiation complex formation in vivo

    Natalia Petrenko et al.
    The requirements for preinitiation complex formation/stability and transcription by RNA polymerase II in yeast cells are different from those in vitro, thereby altering the current view of basal transcription.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Constitutive turnover of histone H2A.Z at yeast promoters requires the preinitiation complex

    Michael Tramantano et al.
    The transcription machinery is required for the disassembly of the promoter-proximal H2A.Z nucleosome, contributing to the constitutive histone turnover at yeast promoters.
    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. 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. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Chemical perturbation of an intrinsically disordered region of TFIID distinguishes two modes of transcription initiation

    Zhengjian Zhang et al.
    An inorganic tin oxochloride cluster specifically binds to an intrinsically disordered, histidine-rich, low complexity protein region and arrests de novo transcription initiation without affecting reinitiation.
    1. Chromosomes and Gene Expression
    2. Genetics and Genomics

    Comparison of transcriptional initiation by RNA polymerase II across eukaryotic species

    Natalia Petrenko, Kevin Struhl
    Although the preinitiation complex for transcriptional initiation by RNA polymerase II contains highly conserved general transcription factors, there are kinetic and compositional differences in the initiation process among eukaryotic species.
    1. Genetics and Genomics

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

    Swati Gaikwad et al.
    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. Cell Biology
    2. Chromosomes and Gene Expression

    Cytoplasmic mRNA decay represses RNA polymerase II transcription during early apoptosis

    Christopher Duncan-Lewis et al.
    Human cells respond to cytoplasmic mRNA depletion during early apoptosis by inhibiting RNA polymerase II transcription, thereby magnifying the gene expression shutdown during stress.
    1. Chromosomes and Gene Expression
    2. Computational and Systems Biology

    TASEP modelling provides a parsimonious explanation for the ability of a single uORF to derepress translation during the integrated stress response

    Dmitry E Andreev et al.
    A model reveals how translation of an mRNA leader could provide resistance to global downregulation of translation.

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