SGD Paper 
Xie J, et al. (1998) Progression through the spliceosome cycle requires Prp38p function for U4/U6 snRNA dissociation. EMBO J 17(10):2938-46
Abstract: The elaborate and energy-intensive spliceosome assembly pathway belies the seemingly simple chemistry of pre-mRNA splicing. Prp38p was previously identified as a protein required in vivo and in vitro for the first pre-mRNA cleavage reaction catalyzed by the spliceosome. Here we show that Prp38p is a unique component of the U4/U6.U5 tri-small nuclear ribonucleoprotein (snRNP) particle and is necessary for an essential step late in spliceosome maturation. Without Prp38p activity spliceosomes form, but arrest in a catalytically impaired state. Functional spliceosomes shed U4 snRNA before 5' splice-site cleavage. In contrast, Prp38p-defective spliceosomes retain U4 snRNA bound to its U6 snRNA base-pairing partner. Prp38p is the first tri-snRNP-specific protein shown to be dispensable for assembly, but required for conformational changes which lead to catalytic activation of the spliceosome.
| Status: Published | Type: Journal Article | PubMed ID: 9582287 |
Topics addressed in this paper
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| Topics | Genes linked to topics |
|---|---|
| PRP38 | |
| Function/Process |  |
| Mutants/Phenotypes | |
| Primary Literature | |
| Protein-Nucleic Acid Interactions | |
| Protein-protein Interactions | |
