1,366 results found
    1. Structural Biology and Molecular Biophysics
    2. Chromosomes and Gene Expression

    AFF4 binding to Tat-P-TEFb indirectly stimulates TAR recognition of super elongation complexes at the HIV promoter

    Ursula Schulze-Gahmen et al.
    AFF4 increases the combined selectivity of HIV Tat and TAR for super elongation complexes 330-fold over P-TEFb alone.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    Ternatin and improved synthetic variants kill cancer cells by targeting the elongation factor-1A ternary complex

    Jordan D Carelli et al.
    An ancient complex comprising the eukaryotic elongation factor-1A and aminoacylated tRNA is shown to be the target of a cyclic heptapeptide and two unrelated natural products with potent anticancer activity.
    1. Chromosomes and Gene Expression
    2. Microbiology and Infectious Disease

    The primary σ factor in Escherichia coli can access the transcription elongation complex from solution in vivo

    Seth R Goldman et al.
    The sigma subunit of bacterial RNA polymerase, classically known as an initiation factor, can also operate as an elongation factor with effects that vary with growth phase.
    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. Biochemistry and Chemical Biology
    2. Cell Biology

    LARP7 suppresses P-TEFb activity to inhibit breast cancer progression and metastasis

    Xiaodan Ji et al.
    Transcription elongation by the elongation factor P-TEFb promotes the epithelial–mesenchymal transition and metastasis of breast cancer cells, implicating inhibition of this factor as a potential treatment for the late stages of this cancer.
    1. Structural Biology and Molecular Biophysics
    2. Chromosomes and Gene Expression

    The AFF4 scaffold binds human P-TEFb adjacent to HIV Tat

    Ursula Schulze-Gahmen et al.
    Structure-function analysis of the super elongation complex formed when HIV replicates inside cells reveals that the HIV-1 Tat protein binds to a cleft between P-TEFb, an enzyme that is involved in normal transcription, and AFF4, a protein that is used to build the super elongation complex
    1. Structural Biology and Molecular Biophysics

    Structural basis for transcription complex disruption by the Mfd translocase

    Jin Young Kang et al.
    Seven distinct cryo-electron microscopy structures delineate the elaborate mechanism for how E. coli Mfd, a transcription repair coupling factor, disassembles the RNA polymerase transcription elongation complex to initiate transcription-coupled repair.
    1. Structural Biology and Molecular Biophysics

    Complete dissection of transcription elongation reveals slow translocation of RNA polymerase II in a linear ratchet mechanism

    Manchuta Dangkulwanich et al.
    Quantification of all the major on- and off-pathway kinetic parameters in the transcription elongation cycle reveals that RNA polymerase II translocates slowly in a linear, non-branched Brownian ratchet mechanism.
    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. Biochemistry and Chemical Biology
    2. Cell Biology

    The translation elongation factor eEF1A1 couples transcription to translation during heat shock response

    Maria Vera et al.
    Eukaryotic translation elongation factor 1A1 controls the process of heat shock response, from transcriptional activation of the HSP70 gene, to HSP70 mRNA stabilization, nuclear export, and translation.

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