Kinetics of DNA Repair in Vicia faba Meristem Regeneration Following Replication Stress

0544197 - ÚEB 2022 RIV CH eng J - Journal Article
Rybaczek, D. - Musiałek, M. W. - Vrána, Jan - Petrovská, Beáta - Pikus, E. G. - Doležel, Jaroslav
Kinetics of DNA Repair in Vicia faba Meristem Regeneration Following Replication Stress.
Cells. Roč. 10, č. 1 (2021), č. článku 88. E-ISSN 2073-4409
R&D Projects: GA MŠMT(CZ) EF16_019/0000827
Institutional support: RVO:61389030
Keywords : 5-ethynyl-2′-deoxyuridine * caffeine * DNA damage * DNA repair * DNA replication * heterochromatin * hydroxyurea * nuclei sorting * premature chromosome condensation * replication stress
OECD category: Biochemistry and molecular biology
Impact factor: 7.666, year: 2021
Method of publishing: Open access
http://doi.org/10.3390/cells10010088

The astonishing survival abilities of Vicia faba, one the earliest domesticated plants, are associated, among other things, to the highly effective replication stress response system which ensures smooth cell division and proper preservation of genomic information. The most crucial pathway here seems to be the ataxia telangiectasia-mutated kinase (ATM)/ataxia telangiectasia and Rad3-related kinase (ATR)-dependent replication stress response mechanism, also present in humans. In this article, we attempted to take an in-depth look at the dynamics of regeneration from the effects of replication inhibition and cell cycle checkpoint overriding causing premature chromosome condensation (PCC) in terms of DNA damage repair and changes in replication dynamics. We were able to distinguish a unique behavior of replication factors at the very start of the regeneration process in the PCC-induced cells. We extended the experiment and decided to profile the changes in replication on the level of a single replication cluster of heterochromatin (both alone and with regard to its position in the nucleus), including the mathematical profiling of the size, activity and shape. The results obtained during these experiments led us to the conclusion that even chaotic events are dealt with in a proper degree of order.
Permanent Link: http://hdl.handle.net/11104/0321245