PMID: 11902902Mar 21, 2002Paper

Hoogsteen-based parallel-stranded duplexes of DNA. Effect of 8-amino-purine derivatives

Journal of the American Chemical Society
Elena CuberoM Orozco

Abstract

The structure of parallel-stranded duplexes of DNA-containing a mixture of guanines (G) and adenines (A) is studied by means of molecular dynamics (MD) simulation, as well as NMR and circular dichroism (CD) spectroscopy. Results demonstrate that the structure is based on the Hoogsteen motif rather than on the reverse Watson-Crick one. Molecular dynamics coupled to thermodynamic integration (MD/TI) calculations and melting experiments allowed us to determine the effect of 8-amino derivatives of A and G and of 8-amino-2'-deoxyinosine on the stability of parallel-stranded duplexes. The large stabilization of the parallel-stranded helix upon 8-amino substitution agrees with a Hoogsteen pairing, confirming MD, NMR, and CD data, and suggests new methods to obtain DNA triplexes for antigene and antisense purposes.

Citations

Jun 13, 2002·Nucleic Acids Research·Anna AviñóRamon Eritja
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Dec 7, 2007·Nucleosides, Nucleotides & Nucleic Acids·Anna AviñóCarlos González
Nov 17, 2005·Biophysical Journal·Elena CuberoModesto Orozco
Nov 20, 2003·Journal of the American Chemical Society·Elena CuberoModesto Orozco
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Oct 21, 2003·Nucleosides, Nucleotides & Nucleic Acids·A AviñóR Eritja
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