The N-terminal domain of human DNA helicase Rtel1 contains a redox active iron-sulfur cluster.

The N-terminal domain of human DNA helicase Rtel1 contains a redox active iron-sulfur cluster.
复制标题

DOI:
10.1155/2014/285791
复制
发表时间:
2014
影响因子:
--
通讯作者:
Ding H
Ding H
中科院分区:
生物学3区
文献类型:
--
作者:
Landry AP;Ding H

文献摘要

参考文献

被引文献

相似文献

人类端粒长度调节因子Rtel1是一个超家族II DNA解旋酶,对维持染色体中适当长度的端粒是必不可少的。在此,我们报道了在大肠杆菌中表达的人Rtel1(RtelN)的N-末端结构域,该蛋白含有一个氧化还原活性铁硫簇,其氧化还原中点电位为−248±10 mV(pH 8.0)。RtelN中的铁硫簇对过氧化氢和一氧化氮敏感,表明Rtel1中的活性氧/氮物种可能通过其铁硫簇的修饰来调节其DNA解旋酶的活性。纯化的RtelN在体外与单链(Ss)和双链(Ds)DNA保持弱结合亲和力。然而,过氧化氢或一氧化氮对铁硫簇的修饰对RtelN的DNA结合活性没有显著影响,表明铁硫簇并不直接参与Rtel1 N-末端结构域的DNA相互作用。
Human telomere length regulator Rtel1 is a superfamily II DNA helicase and is essential for maintaining proper length of telomeres in chromosomes. Here we report that the N-terminal domain of human Rtel1 (RtelN) expressed in Escherichia coli cells produces a protein that contains a redox active iron-sulfur cluster with the redox midpoint potential of −248 ± 10 mV (pH 8.0). The iron-sulfur cluster in RtelN is sensitive to hydrogen peroxide and nitric oxide, indicating that reactive oxygen/nitrogen species may modulate the DNA helicase activity of Rtel1 via modification of its iron-sulfur cluster. Purified RtelN retains a weak binding affinity for the single-stranded (ss) and double-stranded (ds) DNA in vitro. However, modification of the iron-sulfur cluster by hydrogen peroxide or nitric oxide does not significantly affect the DNA binding activity of RtelN, suggesting that the iron-sulfur cluster is not directly involved in the DNA interaction in the N-terminal domain of Rtel1.
DOI: 10.1016/j.cell.2009.06.021
发表时间: 2009-07-10
期刊: Cell
影响因子: 64.5
作者:
Sfeir A;Kosiyatrakul ST;Hockemeyer D;MacRae SL;Karlseder J;Schildkraut CL;de Lange T
通讯作者: de Lange T
DOI: 10.1126/science.1170633
发表时间: 2009-11-13
期刊: Science (New York, N.Y.)
影响因子: --
作者:
de Lange T
通讯作者: de Lange T
DOI: 10.1093/nar/gkq1045
发表时间: 2011-03
影响因子: 14.9
作者:
Uringa EJ;Youds JL;Lisaingo K;Lansdorp PM;Boulton SJ
通讯作者: Boulton SJ
DOI: 10.1016/j.molcel.2006.07.019
发表时间: 2006-09-15
期刊: MOLECULAR CELL
影响因子: 16
作者:
Rudolf, Jana;Makrantoni, Vasso;White, Malcolm F.
通讯作者: White, Malcolm F.
DOI: 10.1016/j.cell.2004.05.026
发表时间: 2004-06-25
期刊: CELL
影响因子: 64.5
作者:
Ding, H;Schertzer, M;Lansdorp, PM
通讯作者: Lansdorp, PM