Structure of the human telomeric Stn1-Ten1 capping complex.
Structure of the human telomeric Stn1-Ten1 capping complex.
复制标题
人端粒STN1-TEN1封码复合物的结构。
DOI:
10.1371/journal.pone.0066756
复制
发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Skordalakes E
中科院分区:
文献类型:
--
作者:
Bryan C;Rice C;Harkisheimer M;Schultz DC;Skordalakes E
The identification of the human homologue of the yeast CST in 2009 posed a new challenge in our understanding of the mechanism of telomere capping in higher eukaryotes. The high-resolution structure of the human Stn1-Ten1 (hStn1-Ten1) complex presented here reveals that hStn1 consists of an OB domain and tandem C-terminal wHTH motifs, while hTen1 consists of a single OB fold. Contacts between the OB domains facilitate formation of a complex that is strikingly similar to the replication protein A (RPA) and yeast Stn1-Ten1 (Ten1) complexes. The hStn1-Ten1 complex exhibits non-specific single-stranded DNA activity that is primarily dependent on hStn1. Cells expressing hStn1 mutants defective for dimerization with hTen1 display elongated telomeres and telomere defects associated with telomere uncapping, suggesting that the telomeric function of hCST is hTen1 dependent. Taken together the data presented here show that the structure of the hStn1-Ten1 subcomplex is conserved across species. Cell based assays indicate that hTen1 is critical for the telomeric function of hCST, both in telomere protection and downregulation of telomerase function.
登录
查看更多内容
DOI:
10.1126/science.1170633
发表时间:
2009-11-13
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
de Lange T
通讯作者:
de Lange T
影响因子:
64.8
作者:
Chen, Liuh-Yow;Redon, Sophie;Lingner, Joachim
通讯作者:
Lingner, Joachim
DOI:
10.1073/pnas.0909203106
发表时间:
2009-11-17
影响因子:
11.1
作者:
Gelinas, Amy D.;Paschini, Margherita;Wuttke, Deborah S.
通讯作者:
Wuttke, Deborah S.
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
44.1
作者:
Huang, Chenhui;Dai, Xueyu;Chai, Weihang
通讯作者:
Chai, Weihang