The second intron in the mitochondrial cytb gene of Saccharomyces capensis, belonging to group I, encodes a 280 amino acid protein containing two LAGLIDADG motifs. Genetic and molecular studies have previously shown that this protein has a dual function in the wild-type strain. It acts as a specific homing endonuclease I- Sca I promoting intron mobility and as a maturase promoting intron splicing. Here we describe the synthesis of a universal code equivalent to the mitochondrial sequence coding for this protein and the in vitro characterization of I- Sca I endonuclease activity, using a truncated mutant form of the protein p28bi2 produced in Escherichia coli. We have also determined the cleavage pattern as well as the recognition site of p28bi2. It was found that p28bi2 generates a double-strand cleavage downstream from the intron insertion site with 4 nt long 3'-overhangs. Mutational analysis of the DNA target site shows that p28bi2 recognizes a 16-19 bp sequence from positions -11 to +8 with respect to the intron insertion site.
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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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