Sequence-directed bending of the DNA double helix is a conformational variation found in both prokaryotic and eukaryotic organisms. The utilization of bent DNA structures from various sources as specific signals recognized by an enzyme is demonstrated here using a unique endonuclease purified from trypanosomatid cells. Crithidia fasciculata nicking enzyme was previously shown to recognize specifically the bent structure found in kinetoplast DNA minicircles. The binding constant measured for this specific interaction is of two orders of magnitude higher than that measured for the binding of the enzyme to a non-curved sequence. As determined by binding competition and mobility shift electrophoresis analyses, this enzyme recognizes the sequence-directed bends associated with the origins of replication of bacteriophage lambda and simian virus 40 (SV40), as well as that located within the autonomously replicating sequence (ARS1) region of the yeast S. cerevisiae.
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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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