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G4 Aptamers: Trends in Structural Design.

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This review details the design and optimization of DNA aptamers featuring a G-quadruplex (G4) core. It covers strategies for constructing G4 aptamers and enhancing their properties through chemical modifications and novel approaches.

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Area of Science:

  • Biochemistry and Molecular Biology
  • Nucleic Acid Aptamer Design
  • Structural Biology

Background:

  • DNA aptamers frequently incorporate a G-quadruplex (G4) core structure.
  • Previous reviews have covered G4 aptamer structures and applications.
  • This review specifically addresses the design and optimization methodologies for G4 aptamers.

Purpose of the Study:

  • To analyze general features of bioactive G-quadruplexes.
  • To outline strategies for constructing G4 aptamers with specific properties and topologies.
  • To discuss chemical modifications for post-SELEX optimization and compare loop/core modification effects.

Main Methods:

  • Analysis of general features of bioactive G-quadruplexes.
  • Outlining strategies for aptamer construction, including modular assembly and folding control.
  • Discussion of chemical modification techniques for G4 aptamer optimization.

Main Results:

  • Identified key strategies for designing and constructing G4 aptamers.
  • Compared the efficacy of loop versus core chemical modifications for aptamer optimization.
  • Highlighted emerging trends like genomic G4-inspired aptamers and combinatorial approaches.

Conclusions:

  • Effective strategies exist for the rational design and optimization of G4 aptamers.
  • Chemical modifications offer a viable route for enhancing G4 aptamer performance.
  • Future directions involve integrating genomic insights and combinatorial methods for balanced aptamer development.