34 results found
    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
    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.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Large-scale remodeling of a repressed exon ribonucleoprotein to an exon definition complex active for splicing

    Somsakul Pop Wongpalee et al.
    A protein regulator of alternative pre-mRNA splicing arrests spliceosome assembly at a previously unrecognized step that defines new intermediate stages in the formation of exon complexes.
    1. Cancer Biology

    Copy-number and gene dependency analysis reveals partial copy loss of wild-type SF3B1 as a novel cancer vulnerability

    Brenton R Paolella et al.
    Partial copy loss of spliceosome genes are common non-driver gene dependencies in cancer.
    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. 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. Structural Biology and Molecular Biophysics

    Single molecule analysis reveals reversible and irreversible steps during spliceosome activation

    Aaron A Hoskins et al.
    Single molecule experiments reveal competition between spliceosome activation and the discard of the triple small nuclear ribonucleoprotein complex.
    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. Cell Biology

    Identification of a small molecule inhibitor that stalls splicing at an early step of spliceosome activation

    Anzhalika Sidarovich et al.
    Stalling spliceosome assembly at a novel step before Bact complex formation reveals new insights into the extensive RNP rearrangements and compositional changes that accompany the intricate process of spliceosome activation.
    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.

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