Ontology highlight
ABSTRACT:
SUBMITTER: Wilkinson ME
PROVIDER: S-EPMC5808836 | biostudies-literature | 2017 Dec
REPOSITORIES: biostudies-literature
Science (New York, N.Y.) 20171116 6368
Introns are removed from eukaryotic messenger RNA precursors by the spliceosome in two transesterification reactions-branching and exon ligation. The mechanism of 3'-splice site recognition during exon ligation has remained unclear. Here we present the 3.7-angstrom cryo-electron microscopy structure of the yeast P-complex spliceosome immediately after exon ligation. The 3'-splice site AG dinucleotide is recognized through non-Watson-Crick pairing with the 5' splice site and the branch-point aden ...[more]