Analysing DNA complexes by circular and linear dichroism
Article first published online: 3 FEB 2004
Copyright © 1994 John Wiley & Sons Ltd.
Journal of Molecular Recognition
Volume 7, Issue 2, pages 141–155, June 1994
How to Cite
Nordén, B. and Kurucsev, T. (1994), Analysing DNA complexes by circular and linear dichroism. J. Mol. Recognit., 7: 141–155. doi: 10.1002/jmr.300070211
- Issue published online: 3 FEB 2004
- Article first published online: 3 FEB 2004
- Manuscript Received: 18 AUG 1993
- DNA binding geometries;
- DNA-drug Complex;
- DNA-protein complex;
- Circular dichroism;
- Linear dichroism
The application of linear and circular dichroism (LD and CD) in nucleic acid research id illustrated by recent results aimed at answering specific structural problem in the interaction of DNA with molecules of biological importance. We first consider the circumstances under which ligands, such as DAPI (4′, 6-diamidino-2-phenylindole), change their preferred binding mode in the minor groove to major groove binding or intercalation. As an extension of this problem we refer to the switch between groove binding and intercalation of structurally similar ligands such as ellipticines and trigonal ruthenium complexes. We also explore the use of LD and CD in the determination of the structure of the complex formed between the polynucleotide poly(dA) and the novel ‘peptide nucleic acid’, consisting of nucleic acid bases joined by a polyamide homomorphous with the deoxyribose-phosphate backbone of DNA. Finally, the structure and interaction of the recombination enzyme RecA with DNA is discussed, in particular the influence of the presence of the intercalators, groove binders or covalent DNA adducts.