The Tetrahymena telomerase p75-p45-p19 subcomplex is a unique CST complex.
The Tetrahymena telomerase p75-p45-p19 subcomplex is a unique CST complex.
复制标题
四膜虫端粒酶 p75-p45-p19 亚复合体是一种独特的 CST 复合体。
DOI:
10.1038/nsmb.3126
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发表时间:
2015-12
影响因子:
16.8
通讯作者:
Lei M
中科院分区:
文献类型:
--
作者:
Wan B;Tang T;Upton H;Shuai J;Zhou Y;Li S;Chen J;Brunzelle JS;Zeng Z;Collins K;Wu J;Lei M
Tetrahymena telomerase holoenzyme subunits p75, p45 and p19 form a subcomplex (7–4–1) peripheral to the catalytic core. We report structures of p45 and p19 and reveal them as the Stn1 and Ten1 subunits of the CST complex, which stimulates telomerase complementary-strand synthesis. 7–4–1 binds telomeric single-stranded DNA, and mutant p19 overexpression causes telomere 3′-overhang elongation. We propose that telomerase-tethered Tetrahymena CST coordinates telomere G-strand and C-strand synthesis.