spliceosome

(noun)

a dynamic complex of RNA and protein subunits that removes introns from precursor mRNA

Related Terms

Examples of spliceosome in the following topics:

  • mRNA Processing

    • The splicing of pre-mRNAs is conducted by complexes of proteins and RNA molecules called spliceosomes .
    • Each spliceosome is composed of five subunits called snRNPs (for small nuclear ribonucleoparticles, and pronounced "snurps".)
    • The snRNPs of the spliceosome were left out of this figure, but it shows the sites within the intron whose interactions are catalyzed by the spliceosome.
    • The splicing process is catalyzed by large complexes called spliceosomes.
    • Each spliceosome is composed of five subunits called snRNPs.

  • RNA Splicing

    • The splicing of messenger RNA is accomplished and catalyzed by a macro-molecule complex known as the spliceosome.
    • The areas for ligation and cleavage are determined by the many sub-units of the spliceosome which include the branch site (A) and the 5' and 3' splice sites.
    • Interactions between these sub-units and the small nuclear ribonucleoproteins (snRNP) found in the spliceosome create a spliceosome A complex which helps determine which introns to leave out and which exons to keep and bind together.