1,686 results found
    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. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural basis of transcription arrest by coliphage HK022 Nun in an Escherichia coli RNA polymerase elongation complex

    Jin Young Kang et al.
    Cryo-electron microscopy structures show how coliphage HK022 Nun blocks Escherichia coli RNA polymerase translocation by mediating multiple interactions between the RNA polymerase and nucleic acids.
    1. Structural Biology and Molecular Biophysics
    2. Chromosomes and Gene Expression

    A novel SH2 recognition mechanism recruits Spt6 to the doubly phosphorylated RNA polymerase II linker at sites of transcription

    Matthew A Sdano et al.
    The tandem SH2 domains of Spt6 use novel mechanisms to bind unexpected phosphorylated serine and threonine residues in the RNA polymerase II linker to recruit Spt6 to sites of transcription and maintain repressive chromatin.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structure of a bacterial RNA polymerase holoenzyme open promoter complex

    Brian Bae et al.
    The crystal structure of bacterial RNA polymerase bound to the transcription bubble reveals key features that support the formation of a double-strand/single-strand DNA junction at the upstream edge of the −10 element where bubble formation initiates.
    1. Chromosomes and Gene Expression

    The nucleosomal barrier to promoter escape by RNA polymerase II is overcome by the chromatin remodeler Chd1

    Peter J Skene et al.
    The ATP-dependent chromatin remodeler Chd1 controls nucleosome turnover to allow RNA Polymerase to transcribe in vivo.
    1. Biochemistry and Chemical Biology

    DNA polymerase V activity is autoregulated by a novel intrinsic DNA-dependent ATPase

    Aysen L Erdem et al.
    DNA synthesis by DNA polymerase V is regulated by an intrinsic DNA-dependent ATPase activity which has not been observed for any other polymerase.
    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    GE23077 binds to the RNA polymerase ‘i’ and ‘i+1’ sites and prevents the binding of initiating nucleotides

    Yu Zhang et al.
    The cyclic-peptide antibiotic GE23077 inhibits bacterial RNA polymerase through a novel target that exhibits low susceptibility to target-based resistance and that enables synthesis of bipartite inhibitors that are exceptionally potent and refractory to target-based resistance.
    1. Chromosomes and Gene Expression
    2. Structural Biology and Molecular Biophysics

    The cryo-EM structure of a 12-subunit variant of RNA polymerase I reveals dissociation of the A49-A34.5 heterodimer and rearrangement of subunit A12.2

    Lucas Tafur et al.
    Cryo-EM structures of RNA polymerase I reveal considerable 'transformers-like' rearrangements where one subcomplex dissociates and is replaced by one domain of another subunit, possibly as an additional layer of transcriptional control.
    1. Structural Biology and Molecular Biophysics

    Fidaxomicin jams Mycobacterium tuberculosis RNA polymerase motions needed for initiation via RbpA contacts

    Hande Boyaci et al.
    Cryo-electron microscopy structures show how the clinically used antimicrobial fidaxomicin binds and inhibits Mycobacterium tuberculosis RNA polymerase by acting like a doorstop to jam the enzyme in an open conformation via the general transcription factor RbpA.
    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.

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