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Human RAD51 paralogue SWSAP1 fosters RAD51 filament by regulating the anti-recombinase FIGNL1 AAA+ ATPase

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Listed:
  • Kenichiro Matsuzaki

    (Osaka University)

  • Shizuka Kondo

    (Osaka University
    Osaka University)

  • Tatsuya Ishikawa

    (Osaka University
    Osaka University)

  • Akira Shinohara

    (Osaka University)

Abstract

RAD51 assembly on single-stranded (ss)DNAs is a crucial step in the homology-dependent repair of DNA damage for genomic stability. The formation of the RAD51 filament is promoted by various RAD51-interacting proteins including RAD51 paralogues. However, the mechanisms underlying the differential control of RAD51-filament dynamics by these factors remain largely unknown. Here, we report a role for the human RAD51 paralogue, SWSAP1, as a novel regulator of RAD51 assembly. Swsap1-deficient cells show defects in DNA damage-induced RAD51 assembly during both mitosis and meiosis. Defective RAD51 assembly in SWSAP1-depleted cells is suppressed by the depletion of FIGNL1, which binds to RAD51 as well as SWSAP1. Purified FIGNL1 promotes the dissociation of RAD51 from ssDNAs. The dismantling activity of FIGNL1 does not require its ATPase but depends on RAD51-binding. Purified SWSAP1 inhibits the RAD51-dismantling activity of FIGNL1. Taken together, our data suggest that SWSAP1 protects RAD51 filaments by antagonizing the anti-recombinase, FIGNL1.

Suggested Citation

  • Kenichiro Matsuzaki & Shizuka Kondo & Tatsuya Ishikawa & Akira Shinohara, 2019. "Human RAD51 paralogue SWSAP1 fosters RAD51 filament by regulating the anti-recombinase FIGNL1 AAA+ ATPase," Nature Communications, Nature, vol. 10(1), pages 1-15, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-09190-1
    DOI: 10.1038/s41467-019-09190-1
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    Cited by:

    1. Guangxue Liu & Jimin Li & Boxue He & Jiaqi Yan & Jingyu Zhao & Xuejie Wang & Xiaocong Zhao & Jingyan Xu & Yeyao Wu & Simin Zhang & Xiaoli Gan & Chun Zhou & Xiangpan Li & Xinghua Zhang & Xuefeng Chen, 2023. "Bre1/RNF20 promotes Rad51-mediated strand exchange and antagonizes the Srs2/FBH1 helicases," Nature Communications, Nature, vol. 14(1), pages 1-17, December.

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