Ait-Saada A, Khorosjutina O, Chen J, Kramarz K, Maksimov V, Svensson JP, Lambert S, Ekwall K. Chromatin remodeler Fft3 plays a dual role at blocked DNA replication forks.
Life Sci Alliance 2019;
2:e201900433. [PMID:
31575705 PMCID:
PMC6771652 DOI:
10.26508/lsa.201900433]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 09/23/2019] [Accepted: 09/24/2019] [Indexed: 01/26/2023] Open
Abstract
Here, we investigate the function of fission yeast Fun30/Smarcad1 family of SNF2 ATPase-dependent chromatin remodeling enzymes in DNA damage repair. There are three Fun30 homologues in fission yeast, Fft1, Fft2, and Fft3. We find that only Fft3 has a function in DNA repair and it is needed for single-strand annealing of an induced double-strand break. Furthermore, we use an inducible replication fork barrier system to show that Fft3 has two distinct roles at blocked DNA replication forks. First, Fft3 is needed for the resection of nascent strands, and second, it is required to restart the blocked forks. The latter function is independent of its ATPase activity.
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