Abstract |
RecQ helicases play an essential role in maintaining genetic integrity in all organisms from Escherichia coli to humans. Defects to these enzymes are responsible for three distinct human diseases: Werner syndrome, Bloom syndrome and Rothmund-Thomson syndrome. All three diseases are characterized by a predisposition to cancer due to increased genomic instability. Previous studies on the effects of non-covalent DNA modifications on the catalytic activity of purified Werner and Bloom DNA helicases have shown that both enzymes have similar sensitivity profiles to these DNA-binding agents and are most strongly inhibited by the minor groove binder distamycin A. In this study, we show that the sensitivity profiles of E. coli RecQ to a number of DNA-binding ligands are different to those observed for WRN and Bloom helicases. These observations may give insights into the differences in molecular mechanisms underlying efficient motor function of RecQ helicases.
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Authors | Bo Zhang, Ai-hua Zhang, Lei Chen, Xu Guang Xi |
Journal | Journal of biochemistry
(J Biochem)
Vol. 143
Issue 6
Pg. 773-9
(Jun 2008)
ISSN: 0021-924X [Print] England |
PMID | 18296713
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Antiviral Agents
- Distamycins
- Enzyme Inhibitors
- Intercalating Agents
- Topoisomerase I Inhibitors
- stallimycin
- DNA
- Adenosine Triphosphatases
- DNA Helicases
- RecQ Helicases
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Topics |
- Adenosine Triphosphatases
(antagonists & inhibitors, genetics, metabolism)
- Antiviral Agents
(pharmacology)
- DNA
(genetics, metabolism)
- DNA Helicases
(antagonists & inhibitors, genetics, metabolism)
- Distamycins
(pharmacology)
- Enzyme Inhibitors
(pharmacology)
- Escherichia coli
(enzymology)
- Intercalating Agents
(pharmacology)
- RecQ Helicases
(antagonists & inhibitors, genetics, metabolism)
- Topoisomerase I Inhibitors
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