We have raised specific antibodies against the PRP6 protein and shown that the U4, U5 and U6 snRNAs are co-precipitated with this protein. Using splicing extracts prepared from in vivo heat-inactivated cells, we have characterized the prp4-1 and prp6-1 biochemical defects. In inactivated prp4-1 cell extracts, the U6 snRNA content as well as the U6, U4/U6 snRNPs and the [U4/U6.U5] tri-snRNP particles amounts are severely reduced. In inactivated prp6-1 cell extracts, the PRP6 mutant protein is barely detectable. Glycerol gradient analyses indicate that, in these extracts, the [U4/U6.U5] tri-snRNPs are present in very low amounts, but U4/U6 snRNP particles are normally represented. These results establish that the PRP6 protein is required for the accumulation of the [U4/U6.U5] tri-snRNP. We found no evidence for the presence of the PRP6 protein in the U4/U6 particle.
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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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