The kinetic values for 7-ethoxycoumarin (7-EC) hydroxylation have been obtained in both the NADPH-cytochrome P450 reductase- and tert-butyl hydroperoxide (TBHP)-supported systems for several Glu318 and Thr319 mutants of cytochrome P450 1A2. The results with the reductase-supported system suggest that Glu318 is important for both substrate binding and catalysis, whereas Thr319 is critical for neither, although the size of the residue at position 319 influences catalytic activity. In contrast, neither Glu318 nor Thr319 appears to be important for catalytic turnover in the TBHP-supported system despite the fact that the size of the amino acid at position 319 affects the binding of TBHP and 7-EC in opposite manners. The roles of these two distal amino acids in the cytochrome P450 1A2-catalyzed oxidation of 7-EC therefore differ for the reactions supported by cytochrome P450 reductase and TBHP.
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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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