The use of divalent metal ions by type II topoisomerases.
The use of divalent metal ions by type II topoisomerases.
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DOI:
10.1039/c003759a
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发表时间:
2010-07
期刊:
影响因子:
--
通讯作者:
Osheroff N
中科院分区:
文献类型:
--
作者:
Deweese JE;Osheroff N
Type II topoisomerases are essential enzymes that regulate DNA under- and overwinding and remove knots and tangles from the genetic material. In order to carry out their critical physiological functions, these enzymes utilize a double-stranded DNA passage mechanism that requires them to generate a transient double-stranded break. Consequently, while necessary for cell survival, type II topoisomerases also have the capacity to fragment the genome. This feature of the prokaryotic and eukaryotic enzymes, respectively, is exploited to treat a variety of bacterial infections and cancers in humans. All type II topoisomerases require divalent metal ions for catalytic function. These metal ions function in two separate active sites and are necessary for the ATPase and DNA cleavage/ligation activities of the enzymes. ATPase activity is required for the strand passage process and utilizes the metal-dependent binding and hydrolysis of ATP to drive structural rearrangements in the protein. Both the DNA cleavage and ligation activities of type II topoisomerases require divalent metal ions and appear to utilize a novel variant of the canonical two-metal-ion phosphotransferase/hydrolase mechanism to facilitate these reactions. This article will focus primarily on eukaryotic type II topoisomerases and the roles of metal ions in the catalytic functions of these enzymes.
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影响因子:
5.6
作者:
Allingham, JS;Pribil, PA;Haniford, DB
通讯作者:
Haniford, DB
影响因子:
2.9
作者:
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通讯作者:
Osheroff, N
DOI:
10.2174/1568011054222364
发表时间:
2005-07-01
期刊:
Current Medicinal Chemistry - Anti-Cancer Agents
影响因子:
--
作者:
Baldwin, E. L.;Osheroff, N.
通讯作者:
Osheroff, N.
影响因子:
64.8
作者:
Berger, JM;Gamblin, SJ;Wang, JC
通讯作者:
Wang, JC
DOI:
10.1073/pnas.95.14.7876
发表时间:
1998-07-07
影响因子:
11.1
作者:
Berger, JM;Fass, D;Harrison, SC
通讯作者:
Harrison, SC