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Click DNA ligation with deoxyribozyme.

Yangyang Chang1,2, Yu Liang2, Haodong Song2

  • 1Central Hospital of Dalian University of Technology, Dalian University of Technology, Dalian 116000, China.

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|October 2, 2025
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Summary
This summary is machine-generated.

Researchers developed novel DNA ligase deoxyribozymes for DNA ligation using click chemistry. These deoxyribozymes enable efficient synthesis of circular DNA structures, advancing DNA nanotechnology and catalysis.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Synthetic Biology

Background:

  • DNA catalysis offers unique reaction scopes and applications in DNA nanostructure construction.
  • Developing DNA ligases with novel ligation mechanisms is crucial for expanding DNA-based technologies.

Purpose of the Study:

  • To isolate and characterize novel DNA ligase deoxyribozymes capable of catalyzing DNA ligation.
  • To explore the application of these deoxyribozymes in synthesizing complex DNA architectures.

Main Methods:

  • In vitro selection from a random DNA pool to identify catalytic deoxyribozymes.
  • Characterization of ligation activity, including rate constants and yields.
  • Nucleotide covariation experiments to elucidate structural and functional properties.

Main Results:

  • Isolation of a new class of DNA ligase deoxyribozymes catalyzing intermolecular DNA ligation via triazole linkages.
  • Identification of a specific deoxyribozyme, CLDz2, with a ligation rate constant of 2.7 × 10-2 h-1 and up to 40% yield.
  • Demonstration of CLDz2's applicability for a broad range of 3' azide DNAs and its use in synthesizing circular DNA with 97% selectivity.

Conclusions:

  • The discovered deoxyribozymes represent a significant advancement in DNA ligation catalysis.
  • CLDz2 provides a robust tool for synthesizing DNA nanostructures and circular DNA templates.
  • This work expands the utility of DNA catalysis for chemical synthesis and nanotechnology.