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- W2023542289 abstract "Exonic splicing enhancer (ESE) sequences are important for the recognition of splice sites in pre-mRNA. These sequences are bound by specific serine-arginine (SR) repeat proteins that promote the assembly of splicing complexes at adjacent splice sites. We have recently identified a splicing coactivator, SRm160/300, which contains SRm160 (the SR nuclear matrix protein of 160 kDa) and a 300-kDa nuclear matrix antigen. In the present study, we show that SRm160/300 is required for a purine-rich ESE to promote the splicing of a pre-mRNA derived from the Drosophila doublesex gene. The association of SRm160/300 and U2 small nuclear ribonucleoprotein particle (snRNP) with this pre-mRNA requires both U1 snRNP and factors bound to the ESE. Independently of pre-mRNA, SRm160/300 specifically interacts with U2 snRNP and with a human homolog of the Drosophila alternative splicing regulator Transformer 2, which binds to purine-rich ESEs. The results suggest a model for ESE function in which the SRm160/300 splicing coactivator promotes critical interactions between ESE-bound activators and the snRNP machinery of the spliceosome." @default.
- W2023542289 created "2016-06-24" @default.
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- W2023542289 date "1999-05-25" @default.
- W2023542289 modified "2023-09-23" @default.
- W2023542289 title "The SRm160/300 splicing coactivator is required for exon-enhancer function" @default.
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- W2023542289 doi "https://doi.org/10.1073/pnas.96.11.6125" @default.
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