The yeast proteases Ddi1 and Wss1 are both involved in the DNA replication stress response

0509273 - ÚOCHB 2020 RIV NL eng J - Journal Article
Svoboda, Michal - Konvalinka, Jan - Trempe, J. F. - Grantz Šašková, Klára
The yeast proteases Ddi1 and Wss1 are both involved in the DNA replication stress response.
Dna Repair. Roč. 80, Aug (2019), s. 45-51. ISSN 1568-7864. E-ISSN 1568-7856
R&D Projects: GA MŠMT(CZ) EF16_019/0000729
Institutional support: RVO:61388963
Keywords : yeast * hydroxyurea * protease * DNA replication stress * Ddi1 * Wss1
OECD category: Cell biology
Impact factor: 3.339, year: 2019
Method of publishing: Open access
https://www.sciencedirect.com/science/article/pii/S1568786419300874?via%3Dihub

Genome integrity and cell survival are dependent on proper replication stress response. Multiple repair pathways addressing obstacles generated by replication stress arose during evolution, and a detailed understanding of these processes is crucial for treatment of numerous human diseases. Here, we investigated the strong negative genetic interaction between two proteases involved in the DNA replication stress response, yeast Wss1 and Ddi1. While Wss1 proteolytically acts on DNA-protein crosslinks, mammalian DDI1 and DDI2 proteins remove RTF2 from stalled forks via a proposed proteasome shuttle hypothesis. We show that the double-deleted Delta ddi1, Delta wss1 yeast strain is hypersensitive to the replication drug hydroxyurea and that this phenotype can be complemented only by catalytically competent Ddi1 protease. Furthermore, our data show the key involvement of the helical domain preceding the Ddi1 protease domain in response to replication stress caused by hydroxyurea, offering the first suggestion of this domain's biological function. Overall, our study provides a basis for a novel dual protease-based mechanism enabling yeast cells to counteract DNA replication stress.
Permanent Link: http://hdl.handle.net/11104/0300029