2017
RECQ5 Helicase Cooperates with MUS81 Endonuclease in Processing Stalled Replication Forks at Common Fragile Sites during Mitosis
DI MARCO, Stefano; Zdenka HAŠANOVÁ; Radhakrishnan KANAGARAJ; Nagaraja CHAPPIDI; Veronika ALTMANNOVÁ et. al.Basic information
Original name
RECQ5 Helicase Cooperates with MUS81 Endonuclease in Processing Stalled Replication Forks at Common Fragile Sites during Mitosis
Authors
DI MARCO, Stefano (756 Switzerland); Zdenka HAŠANOVÁ (703 Slovakia, belonging to the institution); Radhakrishnan KANAGARAJ (756 Switzerland); Nagaraja CHAPPIDI (756 Switzerland); Veronika ALTMANNOVÁ (203 Czech Republic, belonging to the institution); Shruti MENON (756 Switzerland); Hana SEDLÁČKOVÁ (203 Czech Republic, belonging to the institution); Jana LANGHOFF (756 Switzerland); Kalpana SURENDRANATH (826 United Kingdom of Great Britain and Northern Ireland); Daniela HÜHN (756 Switzerland); Rahul BHOWMICK (208 Denmark); María Victoria MARINI PALOMEQUE (858 Uruguay, belonging to the institution); Stefano FERRARI (756 Switzerland); Ian D. HICKSON (208 Denmark); Lumír KREJČÍ (203 Czech Republic, guarantor, belonging to the institution) and Pavel JANSCAK (756 Switzerland)
Edition
Molecular Cell, CAMBRIDGE, CELL PRESS, 2017, 1097-2765
Other information
Language
English
Type of outcome
Article in a journal
Field of Study
10608 Biochemistry and molecular biology
Country of publisher
United States of America
Confidentiality degree
is not subject to a state or trade secret
Impact factor
Impact factor: 14.248
RIV identification code
RIV/00216224:14110/17:00094931
Organization unit
Faculty of Medicine
UT WoS
000402726700009
EID Scopus
2-s2.0-85020070786
Keywords in English
common fragile sites; genomic instability; mitotic DNA synthesis; MUS81; RAD51 filament; RECQ5; replication stress
Tags
International impact, Reviewed
Changed: 8/3/2018 12:41, Soňa Böhmová
Abstract
In the original language
The MUS81-EME1 endonuclease cleaves late replication intermediates at common fragile sites (CFSs) during early mitosis to trigger DNA-repair synthesis that ensures faithful chromosome segregation. Here, we show that these DNA transactions are promoted by RECQ5 DNA helicase in a manner dependent on its Ser727 phosphorylation by CDK1. Upon replication stress, RECQ5 associates with CFSs in early mitosis through its physical interaction with MUS81 and promotes MUS81-dependent mitotic DNA synthesis. RECQ5 depletion or mutational inactivation of its ATP-binding site, RAD51-interacting domain, or phosphorylation site causes excessive binding of RAD51 to CFS loci and impairs CFS expression. This leads to defective chromosome segregation and accumulation of CFS-associated DNA damage in G1 cells. Biochemically, RECQ5 alleviates the inhibitory effect of RAD51 on 30-flap DNA cleavage by MUS81-EME1 through its RAD51 filament disruption activity. These data suggest that RECQ5 removes RAD51 filaments stabilizing stalled replication forks at CFSs and hence facilitates CFS cleavage by MUS81-EME1.
Links
| GA13-26629S, research and development project |
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| GA17-17720S, research and development project |
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| MUNI/M/1894/2014, interní kód MU |
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