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Deciphering aromatic oligoamide foldamer-DNA interactions.

Laurence Delaurière1, Zeyuan Dong, Katta Laxmi-Reddy

  • 1Univ. Bordeaux, IECB, laboratoire ARNA, 2 rue Robert Escarpit, 33607 Pessac, France.

Angewandte Chemie (International Ed. in English)
|December 3, 2011
PubMed
Summary
This summary is machine-generated.

Multiturn helical aromatic amide foldamers with cationic side chains selectively interact with G-quadruplex aptamers. These interactions are specific for side-chain, end-group, diastereoselective, and RNA versus DNA selectivity.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Organic Chemistry

Background:

  • G-quadruplex aptamers are crucial nucleic acid structures with diverse applications.
  • Aromatic amide foldamers offer a versatile platform for molecular recognition.
  • Understanding selective interactions is key to designing novel aptamer-based therapeutics and diagnostics.

Purpose of the Study:

  • To investigate the selective binding interactions between cationic aromatic amide foldamers and G-quadruplex aptamers.
  • To elucidate the structural basis for selectivity in these molecular recognition events.

Main Methods:

  • Synthesis of multiturn helical aromatic amide foldamers with cationic side chains.
  • Biophysical characterization of foldamer-aptamer interactions using techniques like NMR spectroscopy and surface plasmon resonance.
  • Structural studies to determine binding modes and selectivity determinants.

Main Results:

  • Demonstrated side-chain selective interactions between foldamers and G-quadruplex aptamers.
  • Revealed end-group selectivity in the binding events.
  • Established diastereoselective recognition based on the foldamer's helical structure.
  • Showcased RNA- versus DNA-selective binding, highlighting the potential for targeting specific nucleic acid types.

Conclusions:

  • Cationic aromatic amide foldamers exhibit remarkable selectivity in their interactions with G-quadruplex aptamers.
  • These findings provide a foundation for the rational design of foldamer-based aptamer binders for therapeutic and diagnostic applications.
  • The study highlights the potential of foldamers as sophisticated molecular recognition agents in nucleic acid nanotechnology.