| First Author | Fernández-Majada V | Year | 2016 |
| Journal | Nat Commun | Volume | 7 |
| Pages | 12508 | PubMed ID | 27561390 |
| Mgi Jnum | J:241614 | Mgi Id | MGI:5903183 |
| Doi | 10.1038/ncomms12508 | Citation | Fernandez-Majada V, et al. (2016) The tumour suppressor CYLD regulates the p53 DNA damage response. Nat Commun 7:12508 |
| abstractText | The tumour suppressor CYLD is a deubiquitinase previously shown to inhibit NF-kappaB, MAP kinase and Wnt signalling. However, the tumour suppressing mechanisms of CYLD remain poorly understood. Here we show that loss of CYLD catalytic activity causes impaired DNA damage-induced p53 stabilization and activation in epithelial cells and sensitizes mice to chemical carcinogen-induced intestinal and skin tumorigenesis. Mechanistically, CYLD interacts with and deubiquitinates p53 facilitating its stabilization in response to genotoxic stress. Ubiquitin chain-restriction analysis provides evidence that CYLD removes K48 ubiquitin chains from p53 indirectly by cleaving K63 linkages, suggesting that p53 is decorated with complex K48/K63 chains. Moreover, CYLD deficiency also diminishes CEP-1/p53-dependent DNA damage-induced germ cell apoptosis in the nematode Caenorhabditis elegans. Collectively, our results identify CYLD as a deubiquitinase facilitating DNA damage-induced p53 activation and suggest that regulation of p53 responses to genotoxic stress contributes to the tumour suppressor function of CYLD. |
