262 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, Huasong Lu ... Tom Alber
    AFF4 increases the combined selectivity of HIV Tat and TAR for super elongation complexes 330-fold over P-TEFb alone.
    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, Heather Upton ... Tom Alber
    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. Biochemistry and Chemical Biology
    2. Cell Biology

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

    Xiaodan Ji, Huasong Lu ... Kunxin Luo
    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. Chromosomes and Gene Expression

    Promoter-specific changes in initiation, elongation, and homeostasis of histone H3 acetylation during CBP/p300 inhibition

    Emily Hsu, Nathan R Zemke, Arnold J Berk
    CBP/p300 acetylation of histone H3 at promoters and enhancers stimulates transcriptional elongation through recruitment of the super-elongation complex and BRD4.
    1. Cell Biology

    PPP1R35 is a novel centrosomal protein that regulates centriole length in concert with the microcephaly protein RTTN

    Andrew Michael Sydor, Etienne Coyaud ... Vito Mennella
    The previously uncharacterized protein PPP1R35 is a novel centriolar luminal protein critical for centriole elongation by acting in a complex with microcephaly protein RTTN.
    1. Developmental Biology

    Enhancer additivity and non-additivity are determined by enhancer strength in the Drosophila embryo

    Jacques P Bothma, Hernan G Garcia ... Michael Levine
    Quantitative live imaging assays reveal that multiple enhancers often fail to work in an additive fashion in the patterning of the Drosophila embryo, and sometimes even interfere with one another.
    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, Zarko Boskovic ... Robert Tjian
    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. Cell Biology

    Actin assembly ruptures the nuclear envelope by prying the lamina away from nuclear pores and nuclear membranes in starfish oocytes

    Natalia Wesolowska, Ivan Avilov ... Peter Lenart
    Combined light and electron microscopy reveals a new function for Arp2/3-mediated actin assembly in nuclear envelope rupture, which leads to a separation of nuclear membranes and pores from the lamina.
    1. Biochemistry and Chemical Biology

    Delayed inhibition mechanism for secondary channel factor regulation of ribosomal RNA transcription

    Sarah K Stumper, Harini Ravi ... Jeff Gelles
    Single-molecule observations reveal a mechanism that may be used by multiple competing regulatory proteins to control ribosomal RNA production during rapid bacterial cell growth.

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