GEMIN2 promotes accumulation of RAD51 at double-strand breaks in homologous recombination

Yoshimasa Takizawa, Yong Qing, Motoki Takaku, Takako Ishida, Yuichi Morozumi, Takashi Tsujita, Toshiaki Kogame, Kouji Hirota, Masayuki Takahashi, Takehiko Shibata, Hitoshi Kurumizaka, Shunichi Takeda

    Research output: Contribution to journalArticle

    17 Citations (Scopus)

    Abstract

    RAD51 is a key factor in homologous recombination (HR) and plays an essential role in cellular proliferation by repairing DNA damage during replication. The assembly of RAD51 at DNA damage is strictly controlled by RAD51 mediators, including BRCA1 and BRCA2 found that human RAD51 directly binds GEMIN2/SIP1, a protein involved in spliceosome biogenesis. Biochemical analyses indicated that GEMIN2 enhances the RAD51-DNA complex formation by inhibiting RAD51 dissociation from DNA, and thereby stimulates RAD51-mediated homologous pairing. GEMIN2 also enhanced the RAD51-mediated strand exchange, when RPA was pre-bound to ssDNA before the addition of RAD51 analyze the function of GEMIN2, we depleted GEMIN2 in the chicken DT40 line and in human cells. The loss of GEMIN2 reduced HR efficiency and resulted in a significant decrease in the number of RAD51 subnuclear foci, as observed in cells deficient in BRCA1 and BRCA2. These observations and our biochemical analyses reveal that GEMIN2 regulates HR as a novel RAD51 mediator.

    Original languageEnglish
    Article numbergkq271
    Pages (from-to)5059-5074
    Number of pages16
    JournalNucleic Acids Research
    Volume38
    Issue number15
    DOIs
    Publication statusPublished - 2010 Apr 19

    Fingerprint

    Homologous Recombination
    DNA Damage
    Spliceosomes
    DNA
    Chickens
    Cell Proliferation
    Proteins

    ASJC Scopus subject areas

    • Genetics

    Cite this

    Takizawa, Y., Qing, Y., Takaku, M., Ishida, T., Morozumi, Y., Tsujita, T., ... Takeda, S. (2010). GEMIN2 promotes accumulation of RAD51 at double-strand breaks in homologous recombination. Nucleic Acids Research, 38(15), 5059-5074. [gkq271]. https://doi.org/10.1093/nar/gkq271

    GEMIN2 promotes accumulation of RAD51 at double-strand breaks in homologous recombination. / Takizawa, Yoshimasa; Qing, Yong; Takaku, Motoki; Ishida, Takako; Morozumi, Yuichi; Tsujita, Takashi; Kogame, Toshiaki; Hirota, Kouji; Takahashi, Masayuki; Shibata, Takehiko; Kurumizaka, Hitoshi; Takeda, Shunichi.

    In: Nucleic Acids Research, Vol. 38, No. 15, gkq271, 19.04.2010, p. 5059-5074.

    Research output: Contribution to journalArticle

    Takizawa, Y, Qing, Y, Takaku, M, Ishida, T, Morozumi, Y, Tsujita, T, Kogame, T, Hirota, K, Takahashi, M, Shibata, T, Kurumizaka, H & Takeda, S 2010, 'GEMIN2 promotes accumulation of RAD51 at double-strand breaks in homologous recombination', Nucleic Acids Research, vol. 38, no. 15, gkq271, pp. 5059-5074. https://doi.org/10.1093/nar/gkq271
    Takizawa Y, Qing Y, Takaku M, Ishida T, Morozumi Y, Tsujita T et al. GEMIN2 promotes accumulation of RAD51 at double-strand breaks in homologous recombination. Nucleic Acids Research. 2010 Apr 19;38(15):5059-5074. gkq271. https://doi.org/10.1093/nar/gkq271
    Takizawa, Yoshimasa ; Qing, Yong ; Takaku, Motoki ; Ishida, Takako ; Morozumi, Yuichi ; Tsujita, Takashi ; Kogame, Toshiaki ; Hirota, Kouji ; Takahashi, Masayuki ; Shibata, Takehiko ; Kurumizaka, Hitoshi ; Takeda, Shunichi. / GEMIN2 promotes accumulation of RAD51 at double-strand breaks in homologous recombination. In: Nucleic Acids Research. 2010 ; Vol. 38, No. 15. pp. 5059-5074.
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