The evolutionary conserved Ccr4-Not complex controls mRNA metabolism at multiple levels in eukaryotic cells. Genetic analysis of not mutants in yeast identifies a negative role in transcription, which is dependent on core promoter structure. To obtain direct support for this we targeted individual core subunits of the human Ccr4-Not complex to promoters in transient transfections of human cells. In this experimental setup we found that the CNOT2 and CNOT9(hRcd1/hCaf40) subunits act as repressors of reporter gene activity. Interestingly, recruitment of other Ccr4-Not subunits did not affect the reporter gene. The major repression function of CNOT2 is localized in a specialized protein motif, the Not-Box. This conserved motif is present in all CNOT2 orthologs and surprisingly also in CNOT3 orthologs. Repression by the Not-Box was sensitive to treatment with the histone deacetylase inhibitor trichostatin A. In addition, mutation of a canonical TATA-box enhanced repression. Our experiments show for the first time direct regulation of promoter activity by components of the Ccr4-Not complex.
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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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