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.
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DOI:
10.1155/2014/285791
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发表时间:
2014
影响因子:
--
通讯作者:
Ding H
中科院分区:
文献类型:
--
作者:
Landry AP;Ding H
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.
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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
影响因子:
14.9
作者:
Uringa EJ;Youds JL;Lisaingo K;Lansdorp PM;Boulton SJ
通讯作者:
Boulton SJ
影响因子:
16
作者:
Rudolf, Jana;Makrantoni, Vasso;White, Malcolm F.
通讯作者:
White, Malcolm F.
影响因子:
64.5
作者:
Ding, H;Schertzer, M;Lansdorp, PM
通讯作者:
Lansdorp, PM