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
复制
发表时间:
2008-12
影响因子:
3.3
通讯作者:
--
中科院分区:
生物学3区
文献类型:
--
作者:

文献摘要

参考文献

相似文献

众所周知的DNA复制抑制剂--羟基脲可诱导细胞周期阻滞,而完整的检查点功能是这种遗传毒性物质诱导的DNA复制应激中存活所必需的。干扰的DNA合成也会导致DNA损伤水平升高。目前还不清楚生物体如何防止这种类型的DNA损伤的积累,这种损伤与DNA合成受阻同时发生。在这里,我们报告的鉴定石墙(stwl)作为一种新的羟基脲过敏突变体。我们证明,Stwl是必需的,以防止积累的DNA损伤诱导的羟基脲,然而,Stwl是不参与S/M检查点调控。我们表明,Stwl是一个异染色质相关的蛋白质与转录抑制能力。在stwl突变体中,三甲基化H3 K27和H3 K9(沉默染色质的两个标志)的水平降低。我们的数据提供了证据的Stwl依赖的表观遗传机制,参与维持常染色质和异染色质之间的正常平衡,这是必要的,以防止积累的DNA损伤的存在下的DNA复制应力。
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.
在酵母和哺乳动物中,异染色质对 γ-H2AX 修饰具有抵抗力。
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
DOI: 10.1016/s0091-679x(08)60931-0
发表时间: 1994
影响因子: --
作者:
E. Verheyen;L. Cooley
通讯作者: E. Verheyen;L. Cooley
DOI: 10.1016/j.dnarep.2004.02.001
发表时间: 2004-06-03
期刊: DNA REPAIR
影响因子: 3.8
作者:
Gorski, MM;Romeijn, RJ;Pastink, A
通讯作者: Pastink, A
DOI: 10.1002/cyto.a.20241
发表时间: 2006-04-01
期刊: CYTOMETRY PART A
影响因子: 3.7
作者:
Kurose, A;Tanaka, T;Darzynkiewicz, Z
通讯作者: Darzynkiewicz, Z
DOI: 10.1101/gad.6.11.2035
发表时间: 1992-11-01
影响因子: 10.5
作者:
ENOCH, T;CARR, AM;NURSE, P
通讯作者: NURSE, P