PCNA is a homotrimeric ring with important roles in DNA replication and repair. PCNA is loaded and unloaded by the RFC complex, which is composed of five subunits (Rfc1-5). Three additional complexes that share with RFC the small subunits (Rfc2-5) and contain alternative large subunits were found in yeast and other eukaryotes. We have recently reported that one of these, the Elg1-RFC complex, interacts with SUMOylated PCNA and may play a role in its unloading during DNA repair. Here we report that a yeast-two-hybrid screen with the N terminus of Elg1(which interacts with SUMOylated PCNA) uncovered interactions with proteins that belong to the SUMO pathway, including Slx5 and Slx8, which form an E3 ubiquitin ligase that ubiquitinates SUMOylated proteins. Mutations in SLX5 result in a genomic instability phenotype similar to that of elg1 mutants. The physical interaction between the N terminus of Elg1 and Slx5 is mediated by poly-SUMO chains but not by PCNA modifications, and requires Siz2, but not Siz1, activity. Thus our results highlight the many important roles played by Elg1, some of which are PCNA-dependent and some PCNA-independent.
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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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