Protection of internal (TTAGGG)n repeats in Chinese hamster cells by telomeric protein TRF1.
Protection of internal (TTAGGG)n repeats in Chinese hamster cells by telomeric protein TRF1.
复制标题
端粒蛋白 TRF1 对中国仓鼠细胞内部 (TTAGGG)n 重复序列的保护。
DOI:
10.1038/sj.onc.1206745
复制
发表时间:
2003
期刊:
影响因子:
--
通讯作者:
Tomilin,NikolaiViktorovich
中科院分区:
文献类型:
--
作者:
Krutilina,RaisaIvanovna;Smirnova,AlexandraNikolaevna;Mudrak,OlgaStanislavovna;Pleskach,NadezhdaMikhailovna;Svetlova,MariaPavlovna;Oei,Shiao-Li;Yau,PeterM;Bradbury,EdwinMorton;Zalensky,AndreyOlegovich;Tomilin,NikolaiViktorovich
Chinese hamster cells have large interstitial (TTAGGG) bands (ITs) which are unstable and should be protected by an unknown mechanism. Here, we expressed in Chinese hamster V79 cells green fluorescent protein (GFP)-tagged human TRF1, and found that a major fraction of GFP-TRF1 bound to ITs is diffusionally mobile. This fraction strongly decreases after treatment of cells with wortmannin, a protein kinase inhibitor, and this drug also increases the frequency of chromosome aberrations. Ionizing radiation does not induce detectable translocation of GFP-TRF1 to the sites of random double-strand breaks visualized using antibodies against histone γ-H2AX. TRF1 is known to be eliminated from telomeres by overexpression of tankyrase 1 which induces TRF1 poly (ADP-ribosyl) ation. We transfected V79 cells by plasmid encoding tankyrase 1 and found that the frequency of chromosome rearrangements is increased in these cells independently of their treatment by IR. Taken together, our results suggest that TRF1 is involved in sequence-specific protection of internal nontelomeric (TTAGGG) n repeats.
登录
查看更多内容
影响因子:
3.6
作者:
Halpert,JR;Balfour,C;Miller,NE;Kaminsky,LS
通讯作者:
Kaminsky,LS
DOI:
--
发表时间:
1984
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
OrtizdeMontellano,PR;Reich,NO
通讯作者:
Reich,NO
DOI:
--
发表时间:
1983
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Nagahisa,A;Spencer,RW;Orme-Johnson,WH
通讯作者:
Orme-Johnson,WH
影响因子:
3.9
作者:
Johnson,EF;Griffin,KJ
通讯作者:
Griffin,KJ
影响因子:
3.6
作者:
G. Schwab;J. Raucy;Eric F. Johnson
通讯作者:
G. Schwab;J. Raucy;Eric F. Johnson