Cited by 37DNA Repair MechanismsReproductive Biology and FertilityMicrotubule and mitosis dynamics

Phosphoregulation of DSB-1 mediates control of meiotic double-strand break activity

Open access
Guo, Heyun, Stamper, Ericca L, Sato-Carlton, Aya, Shimazoe, Masa A, Li, Xuan, Zhang, Liangyu, Stevens, Lewis, Tam, KC Jacky +2 more·2022·eLife

Published version of a preprint

Abstract

In the first meiotic cell division, proper segregation of chromosomes in most organisms depends on chiasmata, exchanges of continuity between homologous chromosomes that originate from the repair of programmed double-strand breaks (DSBs) catalyzed by the Spo11 endonuclease. Since DSBs can lead to irreparable damage in germ cells, while chromosomes lacking DSBs also lack chiasmata, the number of DSBs must be carefully regulated to be neither too high nor too low. Here, we show that in Caenorhabditis elegans , meiotic DSB levels are controlled by the phosphoregulation of DSB-1, a homolog of the yeast Spo11 cofactor Rec114, by the opposing activities of PP4 PPH-4.1 phosphatase and ATR ATL-1 kinase. Increased DSB-1 phosphorylation in pph-4.1 mutants correlates with reduction in DSB formation, while prevention of DSB-1 phosphorylation drastically increases the number of meiotic DSBs both in pph-4.1 mutants and in the wild-type background. C. elegans and its close relatives also possess a diverged paralog of DSB-1, called DSB-2, and loss of dsb-2 is known to reduce DSB formation in oocytes with increasing age. We show that the proportion of the phosphorylated, and thus inactivated, form of DSB-1 increases with age and upon loss of DSB-2, while non-phosphorylatable DSB-1 rescues the age-dependent decrease in DSBs in dsb-2 mutants. These results suggest that DSB-2 evolved in part to compensate for the inactivation of DSB-1 through phosphorylation, to maintain levels of DSBs in older animals. Our work shows that PP4 PPH-4.1 , ATR ATL-1 , and DSB-2 act in concert with DSB-1 to promote optimal DSB levels throughout the reproductive lifespan.

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Authors
Guo, H., Stamper, E. L., Sato-Carlton, A., Shimazoe, M. A., Li, X., Zhang, L., Stevens, L., Tam, K. J., Dernburg, A. F., & Carlton, P. M.
Affiliations
  • Kyoto University (JP)
  • QB3 (US)
  • Graduate School of Biostudies, Kyoto University, Yoshidakonoe, Sakyo
  • University of Edinburgh (GB)
Corresponding author
Carlton, Peter M
Venue
eLife
Published
2022-06-27
Volume
11
ISSN
2050-084X (ISSN-L)
OpenAlex
W4283642727
Cited by
32
References
99
Citations by year
2026: 6 · 2025: 7 · 2024: 8 · 2023: 9 · 2022: 2
FWCI
2.12
Type
journal article
Language
en
Open access
Locations
  • eLife (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Institutional Repositories DataBase (IRDB) (submittedVersion, cc-by)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Kyoto University Research Information Repository (Kyoto University) (submittedVersion, cc-by)
Funders
  • Japan Society for the Promotion of Science (5H04328, 17K15064)
  • Howard Hughes Medical Institute
  • Naito Foundation
  • Ministry of Education, Culture, Sports, Science and Technology
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Reproductive Biology and Fertility
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
Keywords
meiotic double-strand breaks, REC114, ATR kinase, phosphorylation, chiasma formation, homologous recombination, meiotic recombination, aging, reproductive period, Caenorhabditis elegans, protein evolution
MeSH terms
Animals, Meiosis, Saccharomyces cerevisiae, Caenorhabditis elegans, Saccharomyces cerevisiae Proteins, Caenorhabditis elegans Proteins, Recombinases, DNA Breaks, Double-Stranded, Ataxia Telangiectasia Mutated Proteins

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