Two promoter elements have been defined that activate G1/S-specific transcription in Saccharomyces cerevisiae. SCB elements (CACGAAA) are activated by the Swi4-Swi6 complex, and MCB elements (ACGCGTNA) are activated by the Mbp1-Swi6 complex. CLN1 encodes a cyclin which is expressed during this interval, and requires Swi4 and Swi6 for peak transcription, but it has no consensus SCB elements in its promoter. Two SCB-like sequences had been previously noted and suggested to be the functional promoter elements. Our studies indicate that these sequences are unable to activate transcription of a lacZ reporter construct, or to bind Swi4-Swi6 complexes in vitro. However, a cluster of three sequences resembling MCB sequences are active promoter elements, sufficient to confer G1/S-specific transcription to a reporter. These sites are the predominant activation elements in the CLN1 promoter, and despite their resemblance to MCB elements, they bind Swi4-Swi6 complexes in vitro and require Swi4 and Swi6 for their activity in vivo. This indicates that the sequences that promote Swi4/Swi6 binding have not been fully defined, or that there are multiple Swi4- and Swi6-containing complexes with distinct DNA binding specificities. In addition to these novel Swi4/Swi6-binding sites, these studies also show that there must be at least one novel promoter element that can confer G1/S-specific transcription to CLN1, because when all the potential SCB- and MCB-like sequences are eliminated the transcript is still cell cycle regulated.
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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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