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- W2015120485 abstract "Temperature-sensitive alleles in four genes (slu7-1, prp16-2, prp17-1, and prp18-1) are known to confer a specific block to the second chemical step of pre-mRNA splicing in vivo in the yeast Saccharomyces cerevisiae. Previous studies showed that Prp16p and Prp18p are required solely for the second step in vitro. The RNA-dependent ATPase, Prp16p, functions at a stage in splicing when ATP is required, whereas Prp18p functions at an ATP-independent stage. Here we use immunodepletion to show that the roles of Slu7p and Prp17p are also confined to the second step of splicing. We find that extracts depleted of Prp17p require both Prp17p and ATP for slicing complementation, whereas extracts depleted of Slu7p require only the addition of Slu7p. These different ATP requirements suggest that Prp16p and Prp17p function before Prp18p and Slu7p. Although SLU7 encodes an essential gene product, we find that a null allele of prp17 is temperature-sensitive for growth and has a partial splicing defect in vitro. Finally, high-copy suppression experiments indicate functional interactions between PRP16 and PRP17, PRP16 and SLU7, and SLU7 and PRP18. Taken together, the results suggest that these four factors may function within a multi-component complex that has both an ATP-dependent and an ATP-independent role in the second step of pre-mRNA splicing." @default.
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- W2015120485 date "1995-10-10" @default.
- W2015120485 modified "2023-09-23" @default.
- W2015120485 title "Characterization and functional ordering of Slu7p and Prp17p during the second step of pre-mRNA splicing in yeast." @default.
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- W2015120485 doi "https://doi.org/10.1073/pnas.92.21.9687" @default.
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