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Using modified aptamers for site specific protein-aptamer conjugations.

Ruowen Wang1, Danqing Lu2, Huarong Bai2

  • 1Molecular Sciences and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering and College of Biology, Collaborative Innovation Center for Molecular Engineering and Theranostics, Hunan University, Changsha 410082, China; Departments of Chemistry and Department of Physiology and Functional Genomics, Center for Research at the Bio/Nano Interface, Shands Cancer Center, UF Genetics Institute and McKnight Brain Institute, University of Florida, Gainesville, Florida32611-7200, United States.

Chemical Science
|January 4, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed a bioorthogonal method for DNA-protein conjugation using protein-aptamer templates (PATs). This technique enables precise DNA aptamer attachment to proteins, advancing biological and biomedical applications.

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Area of Science:

  • Bioconjugation Chemistry
  • Molecular Biology
  • Biomedical Engineering

Background:

  • DNA-protein conjugation is crucial for positioning functional molecules in biological studies.
  • Existing methods face challenges in physiological environments, necessitating bioorthogonal approaches.

Purpose of the Study:

  • To develop a selective and site-specific method for DNA aptamer conjugation to proteins.
  • To establish a bioorthogonal chemical strategy for DNA-protein cross-linking.

Main Methods:

  • Utilized protein-aptamer template (PAT)-directed reactions for DNA-protein conjugation.
  • Developed modified oligonucleotides and screened for suitable reactive functionalities.
  • Incorporated F-carboxyl functionality into aptamers using a novel phosphoramidite.

Main Results:

  • Successfully demonstrated selective and site-specific DNA aptamer conjugation to proteins via PATs.
  • Identified F-carboxyl as an effective functionality for this conjugation.
  • Confirmed the necessity of a linker for optimal conjugation efficiency.

Conclusions:

  • Protein-aptamer template-directed reactions offer a robust bioorthogonal strategy for DNA-protein conjugation.
  • The developed method provides a powerful tool for precise molecular positioning in biological and biomedical research.