The nuclear exosome, a macromolecular complex of 3' to 5' exonucleases, is required for the post-transcriptional processing of a variety of RNAs including rRNAs and snoRNAs. Additionally, this complex forms part of a nuclear surveillance network where it acts to degrade any aberrantly processed mRNAs in the nucleus. The exosome complex has been implicated in the biogenesis pathway of general messenger RNAs through its interaction with the 3'-end processing machinery. During the cell cycle, yeast histone mRNAs accumulate in the S-phase and are rapidly degraded as cells enter the G2-phase. To determine if the exosome contributes to the cyclic turnover of yeast histone mRNAs, we examined the pattern of accumulation of 'HTB1' mRNA during the cell cycle in a deletion strain of 'RRP6', a component of the nuclear exosome. Our results show that cells lacking Rrp6p continue to accumulate HTB1 mRNA as the cell cycle proceeds. This continued accumulation appears to result from a delay in exit from S-phase in rrp6 cells. The accumulation of HTB1 mRNA in rrp6 cells is influenced by the interaction of the nuclear exosome with the 3'-end processing machinery although there is no evidence for differential regulation of histone mRNA 3'-end processing during the yeast cell cycle.
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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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Evidence ID | Analyze ID | File | Description |
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