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HipHop interacts with HOAP and HP1 to protect Drosophila telomeres in a sequence-independent manner | |
2010 | |
发表期刊 | EMBO JOURNAL |
ISSN | 0261-4189 |
EISSN | 1460-2075 |
卷号 | 29期号:4页码:819-829 |
发表状态 | 已发表 |
DOI | 10.1038/emboj.2009.394 |
摘要 | Telomeres prevent chromosome ends from being repaired as double-strand breaks (DSBs). Telomere identity in Drosophila is determined epigenetically with no sequence either necessary or sufficient. To better understand this sequence-independent capping mechanism, we isolated proteins that interact with the HP1/ORC-associated protein (HOAP) capping protein, and identified HipHop as a subunit of the complex. Loss of one protein destabilizes the other and renders telomeres susceptible to fusion. Both HipHop and HOAP are enriched at telomeres, where they also interact with the conserved HP1 protein. We developed a model telomere lacking repetitive sequences to study the distribution of HipHop, HOAP and HP1 using chromatin immunoprecipitation (ChIP). We discovered that they occupy a broad region > 10 kb from the chromosome end and their binding is independent of the underlying DNA sequence. HipHop and HOAP are both rapidly evolving proteins yet their telomeric deposition is under the control of the conserved ATM and Mre11-Rad50-Nbs (MRN) proteins that modulate DNA structures at telomeres and at DSBs. Our characterization of HipHop and HOAP reveals functional analogies between the Drosophila proteins and subunits of the yeast and mammalian capping complexes, implicating conservation in epigenetic capping mechanisms. The EMBO Journal (2010) 29, 819-829. doi: 10.1038/emboj.2009.394; Published online 7 January 2010 |
关键词 | capping complex drosophila telomere epigenetic mechanism telomere maintenance |
URL | 查看原文 |
收录类别 | SCI |
WOS研究方向 | Biochemistry & Molecular Biology ; Cell Biology |
WOS类目 | Biochemistry & Molecular Biology ; Cell Biology |
WOS记录号 | WOS:000274604600012 |
WOS关键词 | TO-END FUSIONS ; CHROMOSOME ENDS ; FISSION YEAST ; ARABIDOPSIS-THALIANA ; BINDING-PROTEIN ; DNA BREAKS ; MELANOGASTER ; HETEROCHROMATIN ; MAINTENANCE ; CHROMATIN |
原始文献类型 | Article |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/120396 |
专题 | 个人在本单位外知识产出 |
通讯作者 | Rong, Yikang S. |
作者单位 | 1.NCI, LBMB, NIH, Bethesda, MD 20892 USA 2.NIDDK, LMCB, NIH, Bethesda, MD USA 3.Univ Aquila, Bethesda, MD USA |
推荐引用方式 GB/T 7714 | Gao, Guanjun,Walser, Jean-Claude,Beaucher, Michelle L.,et al. HipHop interacts with HOAP and HP1 to protect Drosophila telomeres in a sequence-independent manner[J]. EMBO JOURNAL,2010,29(4):819-829. |
APA | Gao, Guanjun.,Walser, Jean-Claude.,Beaucher, Michelle L..,Morciano, Patrizia.,Wesolowska, Natalia.,...&Rong, Yikang S..(2010).HipHop interacts with HOAP and HP1 to protect Drosophila telomeres in a sequence-independent manner.EMBO JOURNAL,29(4),819-829. |
MLA | Gao, Guanjun,et al."HipHop interacts with HOAP and HP1 to protect Drosophila telomeres in a sequence-independent manner".EMBO JOURNAL 29.4(2010):819-829. |
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