Splice site choice and splicing efficiency are positively influenced by pre-mRNA intramolecular base pairing in yeast - PubMed (original) (raw)
Splice site choice and splicing efficiency are positively influenced by pre-mRNA intramolecular base pairing in yeast
V Goguel et al. Cell. 1993.
Abstract
Many of the mechanisms that govern splice site selection and splice site partner assignment during pre-mRNA splicing are obscure. To address this problem, we analyzed the splicing of transcripts containing chimeric introns or splice site duplications derived from two natural yeast genes. Our experiments indicate that there are strong context effects that influence splicing efficiency and relative splice site strength. Cis-competition experiments showed that the context effects are not only local, as the source of the 3' splice site region influences 5' splice site selection and the source of the 5' splice site affects 3' splice site selection. A significant fraction of the long-range context effect appears to be due to base pairing between two intronic regions near the 5' splice site and branchpoint, an interaction that positively affects splicing efficiency as well as splice site selection.
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