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Phosphorylated HBO1 at UV irradiated sites is essential for nucleotide excision repair.

ABSTRACT: HBO1, a histone acetyl transferase, is a co-activator of DNA pre-replication complex formation. We recently reported that HBO1 is phosphorylated by ATM and/or ATR and binds to DDB2 after ultraviolet irradiation. Here, we show that phosphorylated HBO1 at cyclobutane pyrimidine dimer (CPD) sites mediates histone acetylation to facilitate recruitment of XPC at the damaged DNA sites. Furthermore, HBO1 facilitates accumulation of SNF2H and ACF1, an ATP-dependent chromatin remodelling complex, to CPD sites. Depletion of HBO1 inhibited repair of CPDs and sensitized cells to ultraviolet irradiation. However, depletion of HBO1 in cells derived from xeroderma pigmentosum patient complementation groups, XPE, XPC and XPA, did not lead to additional sensitivity towards ultraviolet irradiation. Our findings suggest that HBO1 acts in concert with SNF2H-ACF1 to make the chromosome structure more accessible to canonical nucleotide excision repair factors.

SUBMITTER: Niida H

PROVIDER: S-EPMC5520108 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature

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Phosphorylated HBO1 at UV irradiated sites is essential for nucleotide excision repair.

Niida Hiroyuki H Matsunuma Ryoichi R Horiguchi Ryo R Uchida Chiharu C Nakazawa Yuka Y Motegi Akira A Nishimoto Koji K Sakai Satoshi S Ohhata Tatsuya T Kitagawa Kyoko K Moriwaki Shinichi S Nishitani Hideo H Ui Ayako A Ogi Tomoo T Kitagawa Masatoshi M

Nature communications 20170718

HBO1, a histone acetyl transferase, is a co-activator of DNA pre-replication complex formation. We recently reported that HBO1 is phosphorylated by ATM and/or ATR and binds to DDB2 after ultraviolet irradiation. Here, we show that phosphorylated HBO1 at cyclobutane pyrimidine dimer (CPD) sites mediates histone acetylation to facilitate recruitment of XPC at the damaged DNA sites. Furthermore, HBO1 facilitates accumulation of SNF2H and ACF1, an ATP-dependent chromatin remodelling complex, to CPD ...[more]

PMID: 28719581

Dataset Information

Phosphorylated HBO1 at UV irradiated sites is essential for nucleotide excision repair.

Publications

Phosphorylated HBO1 at UV irradiated sites is essential for nucleotide excision repair.

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