A FancD2-monoubiquitin fusion reveals hidden functions of Fanconi anemia core complex in DNA repair

Nobuko Matsushita, Hiroyuki Kitao, Masamichi Ishiai, Naoki Nagashima, Seiki Hirano, Katsuya Okawa, Tomohiko Ohta, David S. Yu, Peter J. McHugh, Ian D. Hickson, Ashok R. Venkitaraman, Hitoshi Kurumizaka, Minoru Takata

研究成果: Contribution to journalArticle査読

111 被引用数 (Scopus)

抄録

In DNA damage responses, the Fanconi anemia (FA) protein, FancD2, is targeted to chromatin and forms nuclear foci following its monoubiquitination, a process likely catalyzed by the FA core complex. Here, we show that a chicken FancD2-ubiquitin fusion protein, carrying a Lys-Arg substitution removing the natural monoubiquitination site (D2KR-Ub), could reverse cisplatin hypersensitivity and localize to chromatin in FANCD2-deficient DT40 cells. Importantly, the chromatin targeting was dependent on three core complex components as well as the hydrophobic surface of ubiquitin that may direct protein-protein interactions. Furthermore, a constitutively chromatin bound fusion of D2KR-histone H2B could complement cisplatin sensitivity in FANCD2- but not FANCC-, FANCG-, or FANCL-deficient cells. Thus these core complex components have an additional function in the DNA repair, which is independent of the monoubiquitination and chromatin targeting of FancD2. These results define functional consequences of FancD2 monoubiquitination and reveal previously hidden functions for the FA protein core complex.

本文言語英語
ページ(範囲)841-847
ページ数7
ジャーナルMolecular Cell
19
6
DOI
出版ステータス出版済み - 9 16 2005
外部発表はい

All Science Journal Classification (ASJC) codes

  • 分子生物学
  • 細胞生物学

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