HeLa cell nuclear extracts contain a protein reactive with antibodies against PRP8, a polypeptide essential for pre-mRNA splicing in yeast and a specific component of the yeast U5 small nuclear ribonucleoprotein (snRNP) [Lossky, M., Anderson, G. J., Jackson, S. P. & Beggs, J. (1987) Cell 51, 1019-1026]. The mammalian protein appears as a doublet at approximately 200 kDa, smaller than the 260-kDa yeast protein, and possesses an Sm epitope as determined by immunoblotting. Its association with a snRNP of the Sm class other than U1 or U2 is indicated by its immunoprecipitation by anti-Sm and anti-trimethylguanosine antibodies but not by anti-(U1) or anti-(U2) RNP sera. Gradient fractionation of splicing extracts demonstrates that the 200-kDa protein is a component of the U4/5/6 snRNP complex and of U5 snRNPs. It is also present in affinity-purified spliceosomes.
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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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