Protection of telomeres 1 (POT1) of Pinus tabuliformis bound the telomere ssDNA.

Protection of telomeres 1 (POT1) of Pinus tabuliformis bound the telomere ssDNA.
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油松端粒保护 1 (POT1) 与端粒 ssDNA 结合。

DOI:
10.1093/treephys/tpz125
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发表时间:
2019
期刊:
影响因子:
4
通讯作者:
Hai Lu
Hai Lu
中科院分区:
农林科学2区
文献类型:
--
作者:
Mei Luo;X. Teng;B. Wang;Jiaxue Zhang;Yadi Liu;Di Liu;Hui Li;Hai Lu

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端粒保护1 (POT1)是一种结合端粒单链(ss)区域的端粒蛋白。它在维持植物和动物的基因组稳定性方面起着至关重要的作用。本研究通过电泳迁移位移法研究油松(Pinus tabulformis)中POT1基因(PtPOT1)的特性。PtPOT1对端粒ssDNA具有亲和力,可以结合植物型和哺乳动物型ssDNA序列。值得注意的是,有两个寡核苷酸/寡糖结合(OB)折叠,OB1或OB2单独或两者一起可以结合ssDNA,这与人类的POT1有明显不同。根据我们的数据,我们假设PtPOT1的两个OB折叠结合了相同的ssDNA。该模型不仅为PtPOT1的ssDNA结合提供了新的见解,而且揭示了裸子植物和人类中POT1蛋白的功能差异。
Protection of telomeres 1 (POT1) is a telomeric protein that binds to the telomere single-stranded (ss) region. It plays an essential role in maintaining genomic stability in both plants and animals. In this study, we investigated the properties of POT1 in Pinus tabuliformis (PtPOT1) through electrophoretic mobility shift assay. PtPOT1 harbored affinity for telomeric ssDNA, and could bind plant- and mammalian-type ssDNA sequences. Notably, there were two oligonucleotide/oligosaccharide binding (OB) folds, and OB1 or OB2 alone, or both together, could bind ssDNA, which is significantly different from human POT1. Based on our data, we hypothesized that the two OB folds of PtPOT1 bound the same ssDNA. This model not only provides new insight into the ssDNA binding of PtPOT1, but also sheds light on the functional divergence of POT1 proteins in gymnosperms and humans.
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