UV damage-induced phosphorylation of HBO1 triggers CRL4DDB2-mediated degradation to regulate cell proliferation

Ryoichi Matsunuma, Hiroyuki Niida, Tatsuya Ohhata, Kyoko Kitagawa, Satoshi Sakai, Chiharu Uchida, Bunsyo Shiotani, Masaki Matsumoto, Keiichi I. Nakayama, Hiroyuki Ogura, Norihiko Shiiya, Masatoshi Kitagawa

研究成果: ジャーナルへの寄稿記事

12 引用 (Scopus)

抜粋

Histone acetyltransferase binding to ORC-1 (HBO1) is a critically important histone acetyltransferase for forming the prereplicative complex (pre-RC) at the replication origin. Pre-RC formation is completed by loading of the MCM2-7 heterohexameric complex, which functions as a helicase in DNA replication. HBO1 recruited to the replication origin by CDT1 acetylates histone H4 to relax the chromatin conformation and facilitates loading of theMCMcomplex onto replication origins. However, the acetylation status and mechanism of regulation of histone H3 at replication origins remain elusive. HBO1 positively regulates cell proliferation under normal cell growth conditions. Whether HBO1 regulates proliferation in response to DNA damage is poorly understood. In this study, we demonstrated that HBO1 was degraded after DNA damage to suppress cell proliferation. Ser50 and Ser53 of HBO1 were phosphorylated in an ATM/ATR DNA damage sensor-dependent manner after UV treatment. ATM/ATR dependently phosphorylated HBO1 preferentially interacted with DDB2 and was ubiquitylated by CRL4DDB2. Replacement of endogenous HBO1 in Ser50/53Ala mutants maintained acetylation of histone H3K14 and impaired cell cycle regulation in response to UV irradiation. Our findings demonstrate that HBO1 is one of the targets in the DNA damage checkpoint. These results show that ubiquitin-dependent control of the HBO1 protein contributes to cell survival during UV irradiation.

元の言語英語
ページ(範囲)394-406
ページ数13
ジャーナルMolecular and cellular biology
36
発行部数3
DOI
出版物ステータス出版済み - 1 1 2016

    フィンガープリント

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Cell Biology

これを引用

Matsunuma, R., Niida, H., Ohhata, T., Kitagawa, K., Sakai, S., Uchida, C., ... Kitagawa, M. (2016). UV damage-induced phosphorylation of HBO1 triggers CRL4DDB2-mediated degradation to regulate cell proliferation. Molecular and cellular biology, 36(3), 394-406. https://doi.org/10.1128/MCB.00809-15