Asymmetry of DNA replication fork progression in Werner's syndrome

Asymmetry of DNA replication fork progression in Werner's syndrome
复制标题

沃纳综合征 DNA 复制叉进展的不对称性

DOI:
10.1046/j.1474-9728.2002.00002.x
复制
发表时间:
2002
期刊:
影响因子:
7.8
通讯作者:
L. Cox
L. Cox
中科院分区:
生物学1区
文献类型:
--
作者:
A. Rodriguez;D. Jackson;F. Iborra;L. Cox

文献摘要

参考文献

被引文献

相似文献

人类的衰老与经历了复制性衰老的细胞的积累有关。罕见的早衰沃纳综合征(WS)提供了正常人类衰老的表型,WS患者细胞在培养中重现了衰老表型,因为它们迅速失去了增殖或复制DNA的能力。WS与功能性WRN蛋白的缺失有关。虽然具有解旋酶和外切酶活性的WRN蛋白的生化特性表明其参与DNA代谢,但其在细胞中的作用尚不清楚。在这里,我们为WRN蛋白在正常增殖细胞中DNA复制中的作用提供了实验证据。最重要的是,我们证明了在缺乏功能性WRN蛋白的情况下,来自双向复制起源的复制分叉无法正常进行,导致双向分叉明显不对称。我们认为,WRN在正常的DNA复制中起作用,以防止复制叉的崩溃或解决停滞的复制叉上的DNA连接,而这种能力的丧失可能是早衰的一个因素。
Human aging is associated with accumulation of cells that have undergone replicative senescence. The rare premature aging Werner's syndrome (WS) provides a phenocopy of normal human aging and WS patient cells recapitulate the aging phenotype in culture as they rapidly lose the ability to proliferate or replicate their DNA. WS is associated with loss of functional WRN protein. Although the biochemical properties of WRN protein, which possesses both helicase and exonuclease activities, suggest an involvement in DNA metabolism, its action in cells is not clear. Here, we provide experimental evidence for a role of the WRN protein in DNA replication in normally proliferating cells. Most importantly, we demonstrate that in the absence of functional WRN protein, replication forks from origins of bidirectional replication fail to progress normally, resulting in marked asymmetry of bidirectional forks. We propose that WRN acts in normal DNA replication to prevent collapse of replication forks or to resolve DNA junctions at stalled replication forks, and that loss of this capacity may be a contributory factor in premature aging.
DOI: --
发表时间: 1998
期刊: 2018 25th IEEE International Conference on Image Processing (ICIP)
影响因子: --
作者:
A. Kamath-Loeb;Jiang-Cheng Shen;L. Loeb;M. Fry
通讯作者: A. Kamath-Loeb;Jiang-Cheng Shen;L. Loeb;M. Fry
Ku 与 Werner 核酸外切酶的功能性相互作用促进受损 DNA 的消化。
DOI: 10.1093/nar/29.9.1926
发表时间: 2001
影响因子: 14.9
作者:
Orren,DK;Machwe,A;Karmakar,P;Piotrowski,J;Cooper,MP;Bohr,VA
通讯作者: Bohr,VA
DOI: 10.1016/0014-4827(92)90074-i
发表时间: 1992-10-01
影响因子: 3.7
作者:
POOT, M;HOEHN, H;MARTIN, GM
通讯作者: MARTIN, GM
DOI: 10.1093/nar/26.12.2879
发表时间: 1998-06-15
影响因子: 14.9
作者:
Shen, JC;Gray, MD;Loeb, LA
通讯作者: Loeb, LA
FFA-1,一种促进细胞核内复制中心形成的蛋白质。
DOI: 10.1126/science.7569932
发表时间: 1995
期刊: Science (New York, N.Y.)
影响因子: --
作者:
Yan,H;Newport,J
通讯作者: Newport,J