Homo-N-oligonucleotides (N1/N9−C1‘ Methylene Bridge Oligonucleotides): Nucleic Acids with Left-Handed Helicity
- 28 May 2004
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 126 (24), 7476-7485
- https://doi.org/10.1021/ja049865t
Abstract
Oligonucleotides containing a methylene bridge between N1 or N9 of the heterocyclic base and C1' of the pentofuranosyl ring (homo-N-oligonucleotides) were synthesized. Melting curves revealed that such homo-type oligomers could cross-pair with complementary homo-type or natural oligomers. Circular-dichroic studies provide evidence that the homo-type dimers have a left-handed stacked conformation and further suggest that single-stranded and double-stranded homo-type oligomers adopt a left-handed conformation, while duplexes with natural oligomers or nucleic acids form RNA-like right-handed helices. NMR spectroscopy (NOESY) provides supporting evidence for a left-handed stacked conformation of the homo-type dimer, while atomic force microscopy indicates a left-handed helical conformation of homo-type dsDNA. Homo-type dimers and oligomers showed high resistance to digestion by snake-venom and calf-spleen phosphodiesterases and nuclease S1.Keywords
This publication has 18 references indexed in Scilit:
- Mechanism of c-Myb–C/EBPβ Cooperation from Separated Sites on a PromoterCell, 2002
- Basis for the Right-Handed Helical Sense of Double-Stranded DNA: Formation of the Right-Handed Helix by l-Oligonucleotides Fixed in Low-anti Glycosyl ConformationJournal of the American Chemical Society, 2001
- Atomic force microscopy of supercoiled DNA structure on micaAnalytica Chimica Acta, 1998
- [(2-Deoxy-α- and β-D-erythro-pentofuranosyl)thymin-1-YL] methane derivatives as potential conformational probes for altDNA oligonucleotidesBioorganic & Medicinal Chemistry Letters, 1996
- Backbone modifications in oligonucleotides and peptide nucleic acid systemsCurrent Opinion in Structural Biology, 1995
- Stacking interactions of ApA analogues with modified backbonesBiopolymers, 1992
- Chemistry of potentially prebiological natural productsChemical Society Reviews, 1992
- Mirror-image DNAJournal of the American Chemical Society, 1991
- Enzymic synthesis of oligonucleotides containing methylphosphonate internucleotide linkagesBiochemistry, 1990
- Polynucleotides.clouridine phosphate. Hybridization with the oligomer of S-cycloadenosine phosphate to form left-handed helical complexesJournal of the American Chemical Society, 1976