The faithful and complete replication of DNA is necessary for the maintenance of genome stability. It is known, however, that replication forks stall at lesions in the DNA template and need to be processed so that replication restart can occur. In fission yeast, the Mus81-Eme1 endonuclease complex (Mus81-Mms4 in Saccharomyces cerevisiae) has been implicated in the processing of aberrant replication intermediates. In this report, we identify the human homolog of the Schizosaccharomyces pombe EME1 gene and have purified the human Mus81-Eme1 heterodimer. We show that Mus81-Eme1 is an endonuclease that exhibits a high specificity for synthetic replication fork structures and 3'-flaps in vitro. The nuclease cleaves Holliday junctions inefficiently ( approximately 75-fold less than flap or fork structures), although cleavage can be increased 6-fold by the presence of homologous sequences previously shown to permit base pair "breathing." We conclude that human Mus81-Eme1 is a flap/fork endonuclease that is likely to play a role in the processing of stalled replication fork intermediates.
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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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