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

doi:10.1016/j.celrep.2014.04.005

. 2014 May 22;7(4):1039-47.

doi: 10.1016/j.celrep.2014.04.005. Epub 2014 May 1.

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

Affiliations

¹ Laboratory of DNA Damage Signaling, Department of Late Effects Studies, Radiation Biology Center, Kyoto University, Kyoto 606-8501, Japan.
² Laboratory of DNA Damage Signaling, Department of Late Effects Studies, Radiation Biology Center, Kyoto University, Kyoto 606-8501, Japan; Japan Society for the Promotion of Science (JSPS), Tokyo 102-0083, Japan.
³ Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan.
⁴ Laboratory of Structural Biology, Graduate School of Advanced Science and Engineering, Waseda University, Tokyo 162-8480, Japan.
⁵ Biosignal Research Center, Organization of Advanced Science and Technology and Department of Biology, Graduate School of Science, Kobe University, Kobe, Hyogo 657-8501, Japan.
⁶ Laboratory of Chromatin Regulatory Network, Department of Mutagenesis, Radiation Biology Center, Kyoto University, Kyoto 606-8501, Japan.
⁷ Laboratory of DNA Damage Signaling, Department of Late Effects Studies, Radiation Biology Center, Kyoto University, Kyoto 606-8501, Japan. Electronic address: mtakata@house.rbc.kyoto-u.ac.jp.

PMID: 24794430
DOI: 10.1016/j.celrep.2014.04.005

Free article

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

Junya Unno et al. Cell Rep. 2014.

Free article

. 2014 May 22;7(4):1039-47.

doi: 10.1016/j.celrep.2014.04.005. Epub 2014 May 1.

Authors

Affiliations

¹ Laboratory of DNA Damage Signaling, Department of Late Effects Studies, Radiation Biology Center, Kyoto University, Kyoto 606-8501, Japan.
² Laboratory of DNA Damage Signaling, Department of Late Effects Studies, Radiation Biology Center, Kyoto University, Kyoto 606-8501, Japan; Japan Society for the Promotion of Science (JSPS), Tokyo 102-0083, Japan.
³ Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan.
⁴ Laboratory of Structural Biology, Graduate School of Advanced Science and Engineering, Waseda University, Tokyo 162-8480, Japan.
⁵ Biosignal Research Center, Organization of Advanced Science and Technology and Department of Biology, Graduate School of Science, Kobe University, Kobe, Hyogo 657-8501, Japan.
⁶ Laboratory of Chromatin Regulatory Network, Department of Mutagenesis, Radiation Biology Center, Kyoto University, Kyoto 606-8501, Japan.
⁷ Laboratory of DNA Damage Signaling, Department of Late Effects Studies, Radiation Biology Center, Kyoto University, Kyoto 606-8501, Japan. Electronic address: mtakata@house.rbc.kyoto-u.ac.jp.

PMID: 24794430
DOI: 10.1016/j.celrep.2014.04.005

Abstract

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.

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

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

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