The tumor suppressor protein p53, once activated, can cause either cell cycle arrest or apoptosis through transactivation of target genes with p53 DNA binding sites (DBS). To investigate the role of p53 DBS in the regulation of this profound, yet poorly understood decision of life versus death, we systematically studied all known and potential p53 DBS. We analysed the DBS separated from surrounding promoter regions in yeast and mammalian assays with and without DNA damage. p53 efficiently utilized the DBS of MDM2 and of genes connected to cell cycle arrest, DNA repair and the death receptor pathway of apoptosis. However, p53 was unable to utilize two-thirds of the isolated DBS, a subset that included almost all DBS of apoptosis-related genes. Neither ASPP2, a p53-interacting protein reported to specifically stimulate p53 transcriptional activity on apoptosis-related promoters, nor DNA damage resulted in p53 utilization of isolated DBS of apoptosis-related genes. Thus, a major regulation of p53 activity occurs at the level of p53 DBS themselves by posing additional requirements for the successful utilization of apoptosis-related DBS.
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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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