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Telomere maintenance: all’s well that ends well

机译:端粒维护:一切顺利,一切顺利

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摘要

The nucleoprotein structures termed telomeres serve to prevent the mis-identification of eukaryotic chromosome ends as sites of DNA damage, but are also among the genomic regions that pose the most problems during DNA replication. Here, we summarize some of the apparent difficulties encountered by the DNA replication machinery when it approaches the chromosome ends. Eukaryotic cells have evolved diverse mechanisms to overcome these problems, underlining the importance of telomere maintenance for a number of aspects of chromosome function. Of particular interest in this respect are the ways in which telomere-binding proteins and components of the DNA damage response machinery may facilitate replication fork progression through telomeres.
机译:称为端粒的核蛋白结构可防止将真核染色体末端误识别为DNA损伤的位点,但它们也是在DNA复制过程中造成最大问题的基因组区域之一。在这里,我们总结了DNA复制机制接近染色体末端时遇到的一些明显困难。真核细胞已经进化出多种机制来克服这些问题,从而强调了端粒维持对于染色体功能的许多方面的重要性。在这方面,特别令人感兴趣的是端粒结合蛋白和DNA损伤应答机制的组成部分可以促进复制叉通过端粒的方式。

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