The DAT1 gene of Saccharomyces cerevisiae encodes a DNA binding protein that specifically interacts with nonalternating oligo(A).oligo(T) tracts (A.T tracts). Deletion analysis of DAT1 coding information showed that the amino-terminal 36 residues are sufficient for specific DNA binding activity. Furthermore, a 35-residue synthetic peptide corresponding to amino acids 2-36 bound to A.T tracts with an equilibrium dissociation constant of 4 x 10(-10) M. Within this region the pentad Gly-Arg-Lys-Pro-Gly is repeated three times. Mutational analysis revealed that the Arg side chains are required for high-affinity binding, whereas the other pentad side chains are dispensable. Chemical interference experiments showed that the DAT1 protein interacts with the minor groove of the double helix. The data suggest that the pentad arginines interact in a cooperative manner with a repeated minor groove feature of A.T tract DNA to achieve high-affinity recognition. Amino acid similarities with other DNA binding proteins suggest that the DAT1 protein pentad represents a specialized example of a widespread motif used by proteins to recognize A.T base pairs.
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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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