1,554 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. Computational and Systems Biology

    CDK9-dependent RNA polymerase II pausing controls transcription initiation

    Saskia Gressel et al.
    CDK9 inhibition in human cells uncovers that Pol II pause duration regulates the frequency of productive transcription initiation.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    E. coli TraR allosterically regulates transcription initiation by altering RNA polymerase conformation

    James Chen et al.
    Cryo-electron microscopy structures, combined with biochemical experiments, show how the E. coli F element-encoded TraR protein regulates transcription initiation by altering RNA polymerase conformation and conformational heterogeneity.
    1. Chromosomes and Gene Expression
    2. Genetics and Genomics

    BET family members Bdf1/2 modulate global transcription initiation and elongation in Saccharomyces cerevisiae

    Rafal Donczew, Steven Hahn
    Yeast bromodomain-containing factors Bdf1/2 offer insights into the biological role of the BET family of transcriptional regulators, which is a promising target in cancer therapy.
    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

    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. 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. Structural Biology and Molecular Biophysics

    Structural mechanism of ATP-independent transcription initiation by RNA polymerase I

    Yan Han et al.
    Structures of RNA polymerase I transcription machinery revealed a ratcheting motion within the complex in coordination with three distinct functional states, implicating a novel mechanism for promoter bubble opening in the absence of ATP hydrolysis.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structure and function of the mycobacterial transcription initiation complex with the essential regulator RbpA

    Elizabeth A Hubin et al.
    The essential mycobacterial transcription factor RbpA interacts with promoter DNA and cooperates with another essential transcription factor, CarD, to stimulate the formation of an intermediate leading to the open promoter complex.
    1. Chromosomes and Gene Expression

    CRISPRi is not strand-specific at all loci and redefines the transcriptional landscape

    Françoise S Howe et al.
    CRISPR interference (CRISPRi), which uses small guide RNAs to target catalytically dead Cas9 protein to chromatin, disrupts existing transcription units and generates new sites for initiation and termination of transcription on both strands of DNA.

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