Related Experiment Video
Updated: May 16, 2026
09:04
Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
Published on: September 21, 2017
Dioxaphosphorinane-constrained nucleic Acid dinucleotides as tools for structural tuning of nucleic acids
Dan-Andrei Catana1, Brice-Loïc Renard, Marie Maturano
1Laboratoire de Synthèse et Physicochimie de Molécules d'Intérêt Biologique, CNRS UMR 5068, Université Paul Sabatier, 31062 Toulouse, France.
Journal of Nucleic Acids
|November 15, 2012
Summary
Researchers modulated nucleic acid structure by introducing dioxaphosphorinane rings into the sugar-phosphate backbone. This approach controls polymer structure and stabilizes secondary structures, impacting DNA-CNA interactions.
Area of Science:
- Medicinal Chemistry
- Organic Chemistry
- Biochemistry
Background:
- The sugar-phosphate backbone is fundamental to nucleic acid structure and function.
- Modulating backbone geometry offers a route to novel nucleic acid analogues.
- Controlling torsion angles (α to ζ) is key to defining polymer conformation.
Purpose of the Study:
- To develop a rational strategy for modulating nucleic acid sugar-phosphate backbone geometry.
- To introduce dioxaphosphorinane rings to control backbone torsion angles.
- To synthesize and characterize D-CNA analogues and assess their structural impact.
Main Methods:
- Design and synthesis of novel nucleic acid analogues incorporating dioxaphosphorinane rings.
- Introduction of cyclic constraints at specific positions within the sugar-phosphate backbone.
- Characterization of synthesized D-CNA diastereoisomers.
- Analysis of the effect of these modifications on secondary structure stabilization.
Main Results:
- Successful introduction of dioxaphosphorinane rings into the nucleic acid backbone.
- Demonstrated control over the six key torsion angles (α to ζ) of the polymer structure.
- Synthesized various members of the D-CNA family.
- Identified specific diastereoisomers of α,β-D-CNA that stabilize secondary structures, some exhibiting canonical B-type values.
Conclusions:
- The dioxaphosphorinane ring approach provides a method to rationally modulate nucleic acid backbone geometry.
- D-CNA analogues offer tunable structural properties for nucleic acid stabilization.
- This work expands the toolkit for designing modified nucleic acids with controlled structural and functional characteristics.
