58 results found
    1. Biochemistry and Chemical Biology

    The HIV-1 Tat protein recruits a ubiquitin ligase to reorganize the 7SK snRNP for transcriptional activation

    Tyler B Faust et al.
    The HIV-1 Tat protein hijacks host non-degradative ubiquitination to trigger the nuclear import of the transcription elongation factor, P-TEFb.
    1. Biochemistry and Chemical Biology

    JMJD6 cleaves MePCE to release positive transcription elongation factor b (P-TEFb) in higher eukaryotes

    Schuyler Lee et al.
    JMJD6 helps BRD4 to recruit CDK9 to RNA Polymerase II by disrupting 7SK snRNP complex.
    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

    Crystal structure of human U1 snRNP, a small nuclear ribonucleoprotein particle, reveals the mechanism of 5′ splice site recognition

    Yasushi Kondo et al.
    The complete architecture of human spliceosomal U1 snRNP and its interaction with the 5′ splice site of pre-mRNA are described in atomic detail.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Compensatory induction of MYC expression by sustained CDK9 inhibition via a BRD4-dependent mechanism

    Huasong Lu et al.
    A new potent and selective CDK9 inhibitor induces the expression of the proto-oncogene MYC via a mechanism that depends on the bromodomain protein BRD4.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Synergistic assembly of human pre-spliceosomes across introns and exons

    Joerg E Braun et al.
    Viewing the dynamic interactions of individual spliceosomal subcomplexes with single pre-messenger RNA molecules reveals how nearby flanking splice sites accelerate pre-spliceosome assembly and the splicing of multi-intron pre-mRNAs.
    1. Structural Biology and Molecular Biophysics

    Structure of human Frizzled5 by fiducial-assisted cryo-EM supports a heterodimeric mechanism of canonical Wnt signaling

    Naotaka Tsutsumi et al.
    Cryo-EM structure of monomeric human Frizzled5 was determined with a universal fiducial antibody at 3.7 Å overall resolution, which supports a simple Fzd/LRP6 heterodimerization mechanism of canonical Wnt/β-catenin signaling.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structural basis for the recognition of spliceosomal SmN/B/B’ proteins by the RBM5 OCRE domain in splicing regulation

    André Mourão et al.
    Interactions with Sm proteins can provide a way in which regulatory factors can modulate alternative splice site choices.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    A mechanism for the extension and unfolding of parallel telomeric G-quadruplexes by human telomerase at single-molecule resolution

    Bishnu P Paudel et al.
    Human telomerase unfolds and extends parallel G-quadruplexes using a unique mechanism involving its RNA template.

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