Multiple facets of TPP1 in telomere maintenance.

Multiple facets of TPP1 in telomere maintenance.
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DOI:
10.1016/j.bbapap.2014.04.014
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发表时间:
2014-09
影响因子:
3.2
通讯作者:
Taylor, Derek J.
Taylor, Derek J.
中科院分区:
生物学3区
文献类型:
--
作者:
Rajavel, Malligarjunan;Mullins, Michael R.;Taylor, Derek J.

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端粒是核蛋白复合物,其覆盖所有线性染色体的末端,并起到防止异常修复和端对端染色体融合的作用。在体细胞中,端粒缩短是衰老过程的一个自然部分,因为它发生在每一轮细胞分裂中。然而,在生殖细胞和干细胞中,端粒酶合成端粒DNA以平衡端粒缩短并帮助维持细胞增殖。在主要的端粒末端结合蛋白中,TPP1最近已经成为保护端粒DNA和将端粒酶募集到端粒末端的主要贡献者。在这篇综述中,我们总结了目前的知识有关的作用,TPP1在端粒的维护。
Telomeres are nucleoprotein complexes that cap the ends of all linear chromosomes and function to prevent aberrant repair and end-to-end chromosome fusions. In somatic cells, telomere shortening is a natural part of the aging process as it occurs with each round of cell division. In germ and stem cells, however, the enzyme telomerase synthesizes telomere DNA to counter-balance telomere shortening and help maintain cellular proliferation. Of the primary telomere end-binding proteins, TPP1 has recently emerged as a primary contributor in protecting telomere DNA and in recruiting telomerase to the telomere ends. In this review, we summarize the current knowledge regarding the role of TPP1 in telomere maintenance.
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