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Related Experiment Videos

Furan based cyclic oligopeptides selectively target G-quadruplex.

Tushar Kanti Chakraborty1, Amit Arora, Saumya Roy

  • 1Indian Institute of Chemical Technology, Hyderabad 500 007, India. chakraborty@iict.res.in

Journal of Medicinal Chemistry
|October 12, 2007
PubMed
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Novel cyclic peptides selectively bind G-quadruplex DNA. Specifically, 24-membered peptides derived from a furan amino acid show high selectivity for telomeric G-quadruplex structures, offering potential genomic targeting applications.

Area of Science:

  • Medicinal Chemistry
  • Molecular Biology
  • Biochemistry

Background:

  • G-quadruplex structures are unique nucleic acid motifs implicated in various genomic functions.
  • Targeting G-quadruplexes offers a promising strategy for therapeutic intervention.
  • Novel peptide scaffolds are being explored for their ability to interact with specific DNA structures.

Purpose of the Study:

  • To investigate the binding properties of novel cyclic oligopeptides synthesized from a furan amino acid.
  • To compare the binding selectivity of these peptides towards G-quadruplex and double-strand DNA.
  • To evaluate the potential of these peptides as scaffolds for targeting genomic quadruplex structures.

Main Methods:

  • Synthesis of 18- and 24-membered cyclic oligopeptides incorporating a novel furan amino acid (5-(aminomethyl)-2-furancarboxylic acid).

Related Experiment Videos

  • Binding assays to assess the interaction of these cyclic peptides with telomeric G-quadruplex DNA and double-strand DNA.
  • Comparative analysis of binding affinities and selectivities.

    • Main Results:

    • The synthesized cyclic oligopeptides demonstrated binding to G-quadruplex structures.
    • A significant difference in binding selectivity was observed between 18- and 24-membered cyclic peptides.
    • 24-membered cyclic peptides exhibited high selectivity for telomeric G-quadruplex structures over double-strand DNA.

    Conclusions:

    • Novel cyclic peptides, particularly those of 24-membered rings, are effective binders of G-quadruplex DNA.
    • These furan amino acid-derived peptides demonstrate high selectivity for telomeric G-quadruplexes.
    • The 24-membered cyclic peptides represent a promising scaffold for developing agents that target quadruplex structures at the genomic level.