Single strand DNA binding proteins 1 and 2 protect newly replicated telomeres
文献类型：期刊论文
| 作者 | Gu, P; Deng, W; Lei, M; Chang, S |
| 刊名 | CELL RESEARCH
 |
| 出版日期 | 2013 |
| 卷号 | 23期号:5页码:705-719 |
| 关键词 | telomere DNA damage and repair cancer apoptosis |
| 通讯作者 | Chang, S (reprint author), Yale Univ, Sch Med, Dept Lab Med & Pathol, 333 Cedar St, New Haven, CT 06520 USA.,s.chang@yale.edu |
| 英文摘要 | Human single-strand (ss) DNA binding proteins 1 and 2 (hSSB1 and 2) are components of the hSSB1/2-INTS3-C9orf80 heterotrimeric protein complex shown to participate in DNA damage response and maintenance of genome stability. However, their roles at telomeres remain unknown. Here, we generated murine SSB1 conditional knockout mice and cells and found that mSSB1 plays a critical role in telomere end protection. Both mSSB1 and mSSB2 localize to a subset of telomeres and are required to repair TRF2-deficient telomeres. Deletion of mSSB1 resulted in increased chromatid-type fusions involving both leading- and lagging-strand telomeric DNA, suggesting that it is required for the protection of G-overhangs. mSSB1's interaction with INTS3 is required for its localization to damaged DNA. mSSB1 interacts with Pot1a, but not Pot1b, and its association with telomeric ssDNA requires Pot1a. mSSB1(Delta/Delta) mice die at birth with developmental abnormalities, while mice with the hypomorphic mSSB1(F/F) allele are born alive and display increased sensitivity to ionizing radiation (IR). Our results suggest that mSSB1 is required to maintain genome stability, and document a previously unrecognized role for mSSB1/2 in the protection of newly replicated leading- and lagging-strand telomeres. |
| 学科主题 | Cell Biology |
| 类目[WOS] | Cell Biology |
| 关键词[WOS] | ABERRANT HOMOLOGOUS RECOMBINATION ; GENOMIC STABILITY ; DAMAGE RESPONSE ; MAMMALIAN TELOMERES ; CELL-CYCLE ; END ; POT1 ; COMPLEXES ; REPAIR ; HSSB1 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000318483200014 |
| 版本 | 出版稿 |
| 源URL | [http://202.127.25.143/handle/331003/388]  |
| 专题 | 上海生化细胞研究所_上海生科院生化细胞研究所 |
| 推荐引用方式 GB/T 7714 | Gu, P,Deng, W,Lei, M,et al. Single strand DNA binding proteins 1 and 2 protect newly replicated telomeres[J]. CELL RESEARCH,2013,23(5):705-719. |
| APA | Gu, P,Deng, W,Lei, M,&Chang, S.(2013).Single strand DNA binding proteins 1 and 2 protect newly replicated telomeres.CELL RESEARCH,23(5),705-719. |
| MLA | Gu, P,et al."Single strand DNA binding proteins 1 and 2 protect newly replicated telomeres".CELL RESEARCH 23.5(2013):705-719. |
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