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Study of the binding of cis- and trans-dichlorodiammineplatinum(II) to calf thymus DNA by extended x-ray absorption fine structure spectroscopy

Teo, Boon-Keng and Eisenberger, P. and Reed, J. and Barton, Jacqueline K. and Lippard, Stephen J. (1978) Study of the binding of cis- and trans-dichlorodiammineplatinum(II) to calf thymus DNA by extended x-ray absorption fine structure spectroscopy. Journal of the American Chemical Society, 100 (10). pp. 3225-3227. ISSN 0002-7863. https://resolver.caltech.edu/CaltechAUTHORS:20170707-172652698

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Abstract

The complex cis-dichlorodiammineplatinum(II) (DDP) is an active antitumor drug while the trans-DDP isomer is ineffective, a result that may reflect differences in their ability to bind DNA.[1-5] While various chemical and physical techniques have been used to explore the interactions of these platinum compounds with DNA, there appears to be no direct structural information about the resulting platinum-DNA complex. Recent crystallographic study[5c] of the blue compound formed between cis-diammineplatinum and a-pyridone (1) suggested[5b] that thymine (2, R = CH3) and guanine (3) bases in DNA might bridge two cis-diammineplatinum units using the deprotonated amide nitrogen and the exocyclic oxygen as donor atoms. The resulting complex would have a short Pt-Pt distance, 2.5-3.2 A, depending upon the platinum oxidation state. To test this possibility and to provide information about the binding sites ofDDP, samples of cis- and trans-[Pt(NH3)iC!i] bound to calf thymus DNA, 4 and 5, respectively, were prepared and studied by extended x-ray absorption fine structure (EXAFS) spectroscopy.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/ja00478a051DOIArticle
http://pubs.acs.org/doi/abs/10.1021/ja00478a051PublisherArticle
ORCID:
AuthorORCID
Barton, Jacqueline K.0000-0001-9883-1600
Additional Information:© 1978 American Chemical Society. Received September 2, 1977. We thank Dr. B. M. Kincaid and Mr. A. L. Simons at Bell Laboratories for valuable assistance in data analysis and programming. We are also grateful to Dr. P.A. Lee (Bell Laboratories) for helpful discussions. The financial support of this work at Columbia was provided by a National Institutes of Health Grant No. CA-15826 from the National Cancer Institute to S.J.L. and by a National Science Foundation Predoctoral Fellowship to J.K.B. A generous loan of K_2PtC_(14) from Engelhard Industries is gratefully acknowledged. Synchrotron radiation was provided by the Stanford Synchrotron Radiation Laboratory supported by National Science Foundation Grant No. DMR 73-07692 in cooperation with the Stanford Linear Accelerator Center and the Energy Research and Development Administration.
Funders:
Funding AgencyGrant Number
NIHCA-15826
NSF Predoctoral FellowshipUNSPECIFIED
Engelhard IndustriesUNSPECIFIED
NSFDMR 73-07692
Stanford Linear Accelerator CenterUNSPECIFIED
Energy Research and Development Administration (ERDA)UNSPECIFIED
Issue or Number:10
Record Number:CaltechAUTHORS:20170707-172652698
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170707-172652698
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:78875
Collection:CaltechAUTHORS
Deposited By: Donna Wrublewski
Deposited On:10 Jul 2017 17:02
Last Modified:03 Oct 2019 18:13

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