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Concerted Action of the Ubiquitin-Fusion Degradation Protein 1 (Ufd1) and Sumo-Targeted Ubiquitin Ligases (STUbLs) in the DNA-Damage Response
In eukaryotes many players in the DNA-damage response (DDR) catalyze protein sumoylation or ubiquitylation. Emphasis has been placed on how these modifications orchestrate the sequential recruitment of repair factors to sites of DNA damage or stalled replication forks. Here, we shed light on a pathw...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Public Library of Science
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3827193/ https://www.ncbi.nlm.nih.gov/pubmed/24265825 http://dx.doi.org/10.1371/journal.pone.0080442 |
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author | Køhler, Julie Bonne Jørgensen, Maria Louise Mønster Beinoraité, Gabriele Thorsen, Michael Thon, Geneviève |
author_facet | Køhler, Julie Bonne Jørgensen, Maria Louise Mønster Beinoraité, Gabriele Thorsen, Michael Thon, Geneviève |
author_sort | Køhler, Julie Bonne |
collection | PubMed |
description | In eukaryotes many players in the DNA-damage response (DDR) catalyze protein sumoylation or ubiquitylation. Emphasis has been placed on how these modifications orchestrate the sequential recruitment of repair factors to sites of DNA damage or stalled replication forks. Here, we shed light on a pathway in which sumoylated factors are eliminated through the coupled action of Sumo-targeted ubiquitin ligases (STUbLs) and the ubiquitin-fusion degradation protein 1 (Ufd1). Ufd1 is a subunit of the Cdc48-Ufd1-Npl4 complex implicated in the sorting of ubiquitylated substrates for degradation by the proteasome. We find that in fission yeast, Ufd1 interacts physically and functionally with the Sumo-targeted ubiquitin ligase (STUbL) Rfp1, homologous to human RNF4, and with the Sumo E3 ligase Pli1, homologous to human PIAS1. Deleting a C-terminal domain of Ufd1 that mediates the interaction of Ufd1 with Rfp1, Pli1, and Sumo (ufd1ΔCt (213-342)) lead to an accumulation of high-molecular-weight Sumo conjugates and caused severe genomic instabilities. The spectrum of sensitivity of ufd1ΔCt (213-342) cells to genotoxins, the epistatic relationships of ufd1ΔCt (213-342) with mutations in DNA repair factors, and the localization of the repair factor Rad22 in ufd1ΔCt (213-342) cells point to ufd1ΔCt (213-342) cells accumulating aberrant structures during replication that require homologous recombination (HR) for their repair. We present evidence that HR is however often not successful in ufd1ΔCt (213-342) cells and we identify Rad22 as one of the high-molecular-weight conjugates accumulating in the ufd1ΔCt (213-342) mutant consistent with Rad22 being a STUbL/Ufd1 substrate. Suggesting a direct role of Ufd1 in the processing of Sumo-conjugates, Ufd1 formed nuclear foci colocalizing with Sumo during the DDR, and Sumo-conjugates accumulated in foci in the ufd1ΔCt (213-342) mutant. Broader functional relationships between Ufd1 and STUbLs conceivably affect numerous cellular processes beyond the DDR. |
format | Online Article Text |
id | pubmed-3827193 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-38271932013-11-21 Concerted Action of the Ubiquitin-Fusion Degradation Protein 1 (Ufd1) and Sumo-Targeted Ubiquitin Ligases (STUbLs) in the DNA-Damage Response Køhler, Julie Bonne Jørgensen, Maria Louise Mønster Beinoraité, Gabriele Thorsen, Michael Thon, Geneviève PLoS One Research Article In eukaryotes many players in the DNA-damage response (DDR) catalyze protein sumoylation or ubiquitylation. Emphasis has been placed on how these modifications orchestrate the sequential recruitment of repair factors to sites of DNA damage or stalled replication forks. Here, we shed light on a pathway in which sumoylated factors are eliminated through the coupled action of Sumo-targeted ubiquitin ligases (STUbLs) and the ubiquitin-fusion degradation protein 1 (Ufd1). Ufd1 is a subunit of the Cdc48-Ufd1-Npl4 complex implicated in the sorting of ubiquitylated substrates for degradation by the proteasome. We find that in fission yeast, Ufd1 interacts physically and functionally with the Sumo-targeted ubiquitin ligase (STUbL) Rfp1, homologous to human RNF4, and with the Sumo E3 ligase Pli1, homologous to human PIAS1. Deleting a C-terminal domain of Ufd1 that mediates the interaction of Ufd1 with Rfp1, Pli1, and Sumo (ufd1ΔCt (213-342)) lead to an accumulation of high-molecular-weight Sumo conjugates and caused severe genomic instabilities. The spectrum of sensitivity of ufd1ΔCt (213-342) cells to genotoxins, the epistatic relationships of ufd1ΔCt (213-342) with mutations in DNA repair factors, and the localization of the repair factor Rad22 in ufd1ΔCt (213-342) cells point to ufd1ΔCt (213-342) cells accumulating aberrant structures during replication that require homologous recombination (HR) for their repair. We present evidence that HR is however often not successful in ufd1ΔCt (213-342) cells and we identify Rad22 as one of the high-molecular-weight conjugates accumulating in the ufd1ΔCt (213-342) mutant consistent with Rad22 being a STUbL/Ufd1 substrate. Suggesting a direct role of Ufd1 in the processing of Sumo-conjugates, Ufd1 formed nuclear foci colocalizing with Sumo during the DDR, and Sumo-conjugates accumulated in foci in the ufd1ΔCt (213-342) mutant. Broader functional relationships between Ufd1 and STUbLs conceivably affect numerous cellular processes beyond the DDR. Public Library of Science 2013-11-12 /pmc/articles/PMC3827193/ /pubmed/24265825 http://dx.doi.org/10.1371/journal.pone.0080442 Text en © 2013 Køhler et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Køhler, Julie Bonne Jørgensen, Maria Louise Mønster Beinoraité, Gabriele Thorsen, Michael Thon, Geneviève Concerted Action of the Ubiquitin-Fusion Degradation Protein 1 (Ufd1) and Sumo-Targeted Ubiquitin Ligases (STUbLs) in the DNA-Damage Response |
title | Concerted Action of the Ubiquitin-Fusion Degradation Protein 1 (Ufd1) and Sumo-Targeted Ubiquitin Ligases (STUbLs) in the DNA-Damage Response |
title_full | Concerted Action of the Ubiquitin-Fusion Degradation Protein 1 (Ufd1) and Sumo-Targeted Ubiquitin Ligases (STUbLs) in the DNA-Damage Response |
title_fullStr | Concerted Action of the Ubiquitin-Fusion Degradation Protein 1 (Ufd1) and Sumo-Targeted Ubiquitin Ligases (STUbLs) in the DNA-Damage Response |
title_full_unstemmed | Concerted Action of the Ubiquitin-Fusion Degradation Protein 1 (Ufd1) and Sumo-Targeted Ubiquitin Ligases (STUbLs) in the DNA-Damage Response |
title_short | Concerted Action of the Ubiquitin-Fusion Degradation Protein 1 (Ufd1) and Sumo-Targeted Ubiquitin Ligases (STUbLs) in the DNA-Damage Response |
title_sort | concerted action of the ubiquitin-fusion degradation protein 1 (ufd1) and sumo-targeted ubiquitin ligases (stubls) in the dna-damage response |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3827193/ https://www.ncbi.nlm.nih.gov/pubmed/24265825 http://dx.doi.org/10.1371/journal.pone.0080442 |
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