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

    Tandem hnRNP A1 RNA recognition motifs act in concert to repress the splicing of survival motor neuron exon 7

    Irene Beusch et al.
    The structural model of hnRNP A1 shows that it can bind with both RRMs to RNA, which is shown to be relevant for the SMN2 exon 7 splicing mechanism in vivo.
    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

    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
    2. Cell Biology

    Minor introns are embedded molecular switches regulated by highly unstable U6atac snRNA

    Ihab Younis et al.
    Hundreds of cell growth and stress response genes are controlled by a rare small RNA component of an ancient splicing machinery, providing a raison d'être for its previously unexplained evolutionary conservation.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    A composite double-/single-stranded RNA-binding region in protein Prp3 supports tri-snRNP stability and splicing

    Sunbin Liu et al.
    Structural and functional analyses show how the spliceosomal Prp3 protein concomitantly binds double- and single- stranded regions in U4/U6 di-snRNAs and serves to stabilize the U4/U6•U5 tri-snRNP for splicing.
    1. Biochemistry and Chemical Biology
    2. Human Biology and Medicine

    The C9ORF72 GGGGCC expansion forms RNA G-quadruplex inclusions and sequesters hnRNP H to disrupt splicing in ALS brains

    Erin G Conlon et al.
    The C9orf72 expansion binds and sequesters the splicing factor hnRNP H leading to insoluble G-quadruplex aggregates that functionally reduce hnRNP H, thereby producing splicing defects.
    1. Biochemistry and Chemical Biology

    Characterisation of the biflavonoid hinokiflavone as a pre-mRNA splicing modulator that inhibits SENP

    Andrea Pawellek et al.
    Hinokiflavone is identified as a splicing modulator that blocks progression from spliceosome complex A to complex B and inhibits SUMO protease SENP1, causing hyper-SUMOylation affecting 6 U2 snRNP proteins.
    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. Structural Biology and Molecular Biophysics

    Dynamics and consequences of spliceosome E complex formation

    Joshua Donald Larson, Aaron A Hoskins
    Single molecule fluorescence analysis of spliceosome E complex formation reveals how tuning of U1 binding to the 5' SS facilitates efficient capture of the snRNP by pre-mRNAs.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    The target of the DEAH-box NTP triphosphatase Prp43 in Saccharomyces cerevisiae spliceosomes is the U2 snRNP-intron interaction

    Jean-Baptiste Fourmann et al.
    Prp43 binds to the pre-mRNA and contacts predominantly U2 proteins in the budding yeast spliceosome.

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