Stwl modifies chromatin compaction and is required to maintain DNA integrity in the presence of perturbed DNA replication.
Stwl modifies chromatin compaction and is required to maintain DNA integrity in the presence of perturbed DNA replication.
复制标题
Stwl 可以改变染色质压缩,并且是在 DNA 复制受到干扰的情况下维持 DNA 完整性所必需的。
DOI:
10.1091/mbc.e08-06-0639
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发表时间:
2008-12
影响因子:
3.3
通讯作者:
中科院分区:
文献类型:
--
作者:
Hydroxyurea, a well-known DNA replication inhibitor, induces cell cycle arrest and intact checkpoint functions are required to survive DNA replication stress induced by this genotoxic agent. Perturbed DNA synthesis also results in elevated levels of DNA damage. It is unclear how organisms prevent accumulation of this type of DNA damage that coincides with hampered DNA synthesis. Here, we report the identification of stonewall (stwl) as a novel hydroxyurea-hypersensitive mutant. We demonstrate that Stwl is required to prevent accumulation of DNA damage induced by hydroxyurea; yet, Stwl is not involved in S/M checkpoint regulation. We show that Stwl is a heterochromatin-associated protein with transcription-repressing capacities. In stwl mutants, levels of trimethylated H3K27 and H3K9 (two hallmarks of silent chromatin) are decreased. Our data provide evidence for a Stwl-dependent epigenetic mechanism that is involved in the maintenance of the normal balance between euchromatin and heterochromatin and that is required to prevent accumulation of DNA damage in the presence of DNA replication stress.
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DOI:
10.1083/jcb.200612031
发表时间:
2007-07-16
期刊:
The Journal of cell biology
影响因子:
--
作者:
Kim JA;Kruhlak M;Dotiwala F;Nussenzweig A;Haber JE
通讯作者:
Haber JE
影响因子:
--
作者:
E. Verheyen;L. Cooley
通讯作者:
E. Verheyen;L. Cooley
影响因子:
3.8
作者:
Gorski, MM;Romeijn, RJ;Pastink, A
通讯作者:
Pastink, A
影响因子:
3.7
作者:
Kurose, A;Tanaka, T;Darzynkiewicz, Z
通讯作者:
Darzynkiewicz, Z
影响因子:
10.5
作者:
ENOCH, T;CARR, AM;NURSE, P
通讯作者:
NURSE, P