Consequences of Cisplatin Binding on Nucleosome Structure and Dynamics
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Todd-2010-Consequences of Cisp.pdf
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Author(s)
Todd, Ryan C.
Lippard, Stephen J.
Date Issued
December 2010
Journal
Chemistry and Biology
Publisher
Elsevier
Citation
Todd, Ryan C., and Stephen J. Lippard. “Consequences of Cisplatin Binding on Nucleosome Structure and Dynamics.” Chemistry & Biology 17, no. 12 (December 2010): 1334–1343. © 2010 Elsevier Ltd.
Version
Final published version
Abstract
The effects of cisplatin binding to DNA were explored at the nucleosome level to incorporate key features of the eukaryotic nuclear environment. An X-ray crystal structure of a site-specifically platinated nucleosome carrying a 1,3-cis-{Pt(NH[subscript 3])[subscript 2]}[superscript 2+]-d(GpTpG) intrastrand cross-link reveals the details of how this adduct dictates the rotational positioning of DNA in the nucleosome. Results from in vitro nucleosome mobility assays indicate that a single platinum adduct interferes with ATP-independent sliding of DNA around the octamer core. Data from in vitro transcription experiments suggest that RNA polymerases can successfully navigate along cisplatin-damaged DNA templates that contain nucleosomes, but stall when the transcription elongation complex physically contacts a platinum cross-link located on the template strand. These results provide information about the effects of cisplatin binding to nuclear DNA and enhance our understanding of the mechanism of transcription inhibition by platinum anticancer compounds.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1016/j.chembiol.2010.10.018
