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Publication Detail
Phosphonomethyl Oligonucleotides as Backbone-Modified Artificial Genetic Polymers.
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Research Support, Non-U.S. Gov't
  • Authors:
    Liu C, Cozens C, Jaziri F, Rozenski J, Maréchal A, Dumbre S, Pezo V, Marlière P, Pinheiro VB, Groaz E, Herdewijn P
  • Publication date:
  • Pagination:
    6690, 6699
  • Journal:
    Journal of the American Chemical Society
  • Volume:
  • Issue:
  • Medium:
  • Status:
  • Print ISSN:
  • Language:
  • Keywords:
    Polymers, Ligases, DNA, Xenobiotics, Protein Engineering, Molecular Structure, Models, Molecular, Organophosphonates
  • Addresses:
    Medicinal Chemistry , Rega Institute for Medical Research, KU Leuven , Herestraat 49 , 3000 Leuven , Belgium.
Although several synthetic or xenobiotic nucleic acids (XNAs) have been shown to be viable genetic materials in vitro, major hurdles remain for their in vivo applications, particularly orthogonality. The availability of XNAs that do not interact with natural nucleic acids and are not affected by natural DNA processing enzymes, as well as specialized XNA processing enzymes that do not interact with natural nucleic acids, is essential. Here, we report 3'-2' phosphonomethyl-threosyl nucleic acid (tPhoNA) as a novel XNA genetic material and a prime candidate for in vivo XNA applications. We established routes for the chemical synthesis of phosphonate nucleic acids and phosphorylated monomeric building blocks, and we demonstrated that DNA duplexes were destabilized upon replacement with tPhoNA. We engineered a novel tPhoNA synthetase enzyme and, with a previously reported XNA reverse transcriptase, demonstrated that tPhoNA is a viable genetic material (with an aggregate error rate of approximately 17 × 10-3 per base) compatible with the isolation of functional XNAs. In vivo experiments to test tPhoNA orthogonality showed that the E. coli cellular machinery had only very limited potential to access genetic information in tPhoNA. Our work is the first report of a synthetic genetic material modified in both sugar and phosphate backbone moieties and represents a significant advance in biorthogonality toward the introduction of XNA systems in vivo.
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