FANCD2 binds CtIP and regulates DNA-end resection during DNA interstrand crosslink repair

Junya Unno, Akiko Itaya, Masato Taoka, Koichi Sato, Junya Tomida, Wataru Sakai, Kaoru Sugasawa, Masamichi Ishiai, Tsuyoshi Ikura, Toshiaki Isobe, Hitoshi Kurumizaka, Minoru Takata*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    66 Citations (Scopus)


    The Fanconi anemia (FA) pathway is critically involved in the maintenance of hematopoietic stem cells and the suppression of carcinogenesis. A key FA protein, FANCD2, is monoubiquitinated and accumulates in chromatin in response to DNA interstrand crosslinks (ICLs), where it coordinates DNA repair through mechanisms that are still poorly understood. Here, we report that CtIP protein directly interacts with FANCD2. A region spanning amino acids 166 to 273 of CtIP and monoubiquitination of FANCD2 are both essential for the FANCD2-CtIP interaction and mitomycin C (MMC)-induced CtIP foci. Remarkably, both FANCD2 and CtIP are critical for MMC-induced RPA2 hyperphosphorylation, an event that accompanies end resection of double-strand breaks. Collectively, our results reveal a role of monoubiquitinated FANCD2 in end resection that depends on its binding to CtIP during ICL repair.

    Original languageEnglish
    Pages (from-to)1039-1047
    Number of pages9
    JournalCell Reports
    Issue number4
    Publication statusPublished - 2014 May 22

    ASJC Scopus subject areas

    • General Biochemistry,Genetics and Molecular Biology


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