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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
Antiparallel triple helices. Structural characteristics and stabilization by 8-amino derivatives
Anna Aviñó1, Elena Cubero, Carlos González
1Institut de Biologia Molecular de Barcelona, CSIC, C/Jordi Girona 18-26, E-08034 Barcelona, Spain.
Journal of the American Chemical Society
|December 18, 2003
Summary
Antiparallel DNA triplexes were stabilized by 8-aminopurines, confirmed by simulations and experiments. This advance enables oligonucleotides to bind single-stranded nucleic acids via antiparallel triplex formation.
Area of Science:
- Molecular Biology
- Biophysics
- Computational Chemistry
Background:
- Antiparallel DNA triplexes are crucial for nucleic acid recognition.
- Understanding their structural and dynamic properties is key for applications.
- The d(G#G.C), d(A#A.T), and d(T#A.T) motifs form the basis of these structures.
Purpose of the Study:
- To investigate the structural, dynamical, and recognition properties of antiparallel DNA triplexes.
- To determine the stabilizing effect of 8-aminopurines on these triplexes.
- To validate computational predictions through experimental synthesis and testing.
Main Methods:
- Advanced molecular dynamics simulations to study triplex characteristics.
- Molecular dynamics and thermodynamic integration for stabilization calculations.
- Oligonucleotide synthesis and experimental validation in various systems.
Main Results:
- Molecular dynamics simulations provided detailed insights into triplex properties.
- Calculations predicted significant stabilization upon 8-aminopurine introduction.
- Experimental results confirmed substantial triplex stabilization, aligning with simulations.
Conclusions:
- 8-Aminopurine derivatives significantly stabilize antiparallel DNA triplexes.
- Computational and experimental findings support this stabilization effect.
- Oligonucleotides with 8-aminopurines can effectively bind single-stranded nucleic acids via antiparallel triplexes.
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