Restarting stalled replication forks partly depends on the break-induced recombination pathway, in which a DNA double-stranded break (DSB) is created on the stalled replication fork to initiate the downstream recombination cascades. Single-stranded DNA gaps accumulating on stalled replication forks are potential targets for endonucleases to generate DSBs. However, it is unclear how this process is executed and which nucleases are involved in eukaryotic cells. Here, we identify a novel gap endonuclease (GEN) activity of human flap endonuclease 1 (FEN-1), critical in resolving stalled replication fork. In response to replication arrest, FEN-1 interacts specifically with Werner syndrome protein for efficient fork cleavage. Replication protein A facilitates FEN-1 interaction with DNA bubble structures. Human FEN-1, but not the GEN-deficient mutant, E178A, was shown to rescue the defect in resistance to UV and camptothecin in a yeast FEN-1 null mutant.
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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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| Evidence ID | Analyze ID | File | Description |
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