Human Ku70/80 interacts directly with hTR, the RNA component of human telomerase.
Human Ku70/80 interacts directly with hTR, the RNA component of human telomerase.
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人Ku70/80与人端粒酶的RNA成分HTR直接相互作用。
DOI:
10.1093/nar/gki342
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发表时间:
2005
影响因子:
14.9
通讯作者:
Beattie, TL
中科院分区:
文献类型:
--
作者:
Ting, NSY;Yu, YP;Pohorelic, B;Lees-Miller, SP;Beattie, TL
Maintenance of telomere integrity requires the dynamic interplay between telomerase, telomere-associated proteins and DNA repair proteins. These interactions are vital to suppress DNA damage responses and changes in chromosome dynamics that can result in aneuploidy or other transforming aberrations. The interaction between the DNA repair protein Ku and the RNA component of telomerase (TLC1) in Saccharomyces cerevisiae has been shown to be important for maintaining telomere length. Here, we sought to determine whether this interaction was conserved in higher eukaryotes. Although there is no sequence similarity between TLC1 and the RNA component (hTR) of human telomerase, we show that human Ku70/80 interacts with hTR both in vitro and in a cellular context. Specifically, Ku70/80 interacts with a 47 nt region of the 3′ end of hTR, which resembles the stem–loop region of the yeast Ku70/80 binding domain on TLC1. Furthermore, utilizing immunoprecipitation/RT–PCR experiments, we show that Ku interacts with hTR in cell lines deficient in the human telomerase reverse transcriptase protein (hTERT), suggesting that this interaction does not require hTERT. These data suggest that Ku interacts directly with hTR, independent of hTERT, providing evidence for the conservation of the interaction between Ku and telomerase RNA among various species and provide significant insight into how Ku is involved in telomere maintenance in higher eukaryotes.
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影响因子:
3.8
作者:
Goodarzi, AA;Lees-Miller, SP
通讯作者:
Lees-Miller, SP
影响因子:
4.8
作者:
Bianchi, A;de Lange, T
通讯作者:
de Lange, T
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4.8
作者:
Chai, WH;Ford, LP;Shay, JW
通讯作者:
Shay, JW
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9.2
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Dandjinou, AT;Lévesque, N;Wellinger, RJ
通讯作者:
Wellinger, RJ
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11.4
作者:
Espejel, S;Franco, S;Blasco, MA
通讯作者:
Blasco, MA