Mediator was first identified because of its activity in activator-stimulated transcription in vivo and in vitro. Later, biochemical fractionation led to the co-purification of the multi-subunit Mediator complex and RNA polymerase II (pol II). Results of these studies suggested a model whereby transcription-activator proteins, which bind to specific gene regulatory sequences, recruit both Mediator and pol II as a holoenzyme in a one-step mechanism. More recent studies of Drosophila Mediator and additional studies in yeast have demonstrated that different transcription activators can bind and recruit Mediator to promoters in vivo in a step that is independent of pol II recruitment. Moreover, the different activators in Drosophila bind and recruit Mediator via physical interactions with specific subsets of proteins. These features of Mediator function seem to be broadly conserved.
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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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