MTV sings jubilation for telomere biology in Drosophila.

MTV sings jubilation for telomere biology in Drosophila.
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MTV 为果蝇的端粒生物学欢呼。

DOI:
10.1080/19336934.2017.1325979
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发表时间:
2018-01-02
期刊:
Fly
影响因子:
1.2
通讯作者:
Rong YS
Rong YS
中科院分区:
生物学4区
文献类型:
--
作者:
Cheng L;Cui M;Rong YS

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端粒保护线性染色体的末端。端粒功能障碍加剧了基因组的不稳定性,可能导致癌症等疾病。30多年来,果蝇作为唯一不依赖保守的端粒酶进行末端保护的主要模式生物一直吸引着该领域。果蝇驯化了反转录转座子,而不是染色体末端的短DNA重复序列。此外,端粒保护在正常的实验室条件下可以是完全不依赖于序列的,再次不同于已经建立的端粒酶维持系统。尽管存在这些重大差异,但我们和其他人最近的研究揭示了这两个系统之间的显著相似性。特别地,随着MTV复合物作为果蝇中端粒完整性所必需的ssDNA结合复合物的鉴定(Zhang et al. 2016 Plos Genetics),我们现在已经建立了几个普遍的原则,这些原则是染色体末端固有的,但独立于潜在的DNA序列或端粒酶。果蝇端粒的研究将继续产生基本的见解,有助于理解端粒的进化和端粒的功能。
Telomere protects the ends of linear chromosomes. Telomere dysfunction fuels genome instability that can lead to diseases such as cancer. For over 30 years, Drosophila has fascinated the field as the only major model organism that does not rely on the conserved telomerase enzyme for end protection. Instead of short DNA repeats at chromosome ends, Drosophila has domesticated retrotransposons. In addition, telomere protection can be entirely sequence-independent under normal laboratory conditions, again dissimilar to what has been established for telomerase-maintained systems. Despite these major differences, recent studies from us and others have revealed remarkable similarities between the 2 systems. In particular, with the identification of the MTV complex as an ssDNA binding complex essential for telomere integrity in Drosophila (Zhang et al. 2016 Plos Genetics), we have now established several universal principles that are intrinsic to chromosome extremities but independent of the underlying DNA sequences or the telomerase enzyme. Telomere studies in Drosophila will continue to yield fundamental insights that are instrumental to the understanding of the evolution of telomere and telomeric functions.
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