The PRP31 gene encodes a factor essential for the splicing of pre-mRNA in Saccharomyces cerevisiae. Cell extracts derived from a prp31-1 strain fail to form mature spliceosomes upon heat inactivation, although commitment complexes and prespliceosome complexes are detected under these conditions. Coimmunoprecipitation experiments indicate that Prp31p is associated both with the U4/U6 x U5 tri-snRNP and, independently, with the prespliceosome prior to assembly of the tri-snRNP into the splicing complex. Nondenaturing gel electrophoresis and glycerol gradient analyses demonstrate that while Prp31p may play a role in maintaining the assembly or stability of tri-snRNPs, functional protein is not essential for the formation of U4/U6 or U4/U6 x U5 snRNPs. These results suggest that Prp31p is involved in recruiting the U4/U6 x U5 tri-snRNP to prespliceosome complexes or in stabilizing these interactions.
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| Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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| Site | Modification | Modifier | Source | Reference |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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| Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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| Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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