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. 1987 Aug 25;15(16):6625–6641. doi: 10.1093/nar/15.16.6625

Alpha-DNA. IV: Alpha-anomeric and beta-anomeric tetrathymidylates covalently linked to intercalating oxazolopyridocarbazole. Synthesis, physicochemical properties and poly (rA) binding.

C Gautier, F Morvan, B Rayner, T Huynh-Dinh, J Igolen, J L Imbach, C Paoletti, J Paoletti
PMCID: PMC306127  PMID: 3628001

Abstract

A new set of molecules made of an intercalating agent (oxazolopyridocarbazole, OPC) covalently linked through a polymethylene chain of various length to the 3' end of alpha-anomeric or beta-anomeric tetradeoxynucleotides (alpha- or beta-T4) have been synthesized. The beta-thymidylate modified compound (beta-T4C5OPC) is able to interact with the complementary sequence, beta-poly (rA); this interaction is strongly stabilized compared to the parent compound, beta-oligo(dT)4 and is specific for poly (rA). The molecule synthesized from the unnatural alpha-anomer, alpha-T4C5OPC, is also able to interact with poly (rA) leading to the formation of an alpha-beta hybrid stabilized by the energy provided by the OPC moiety. The stoechiometry of the binding reaction shows that an A-T pairing occurs in the alpha-beta heterohybrids. Tm studies reveal that the alpha-beta heterohybrids are more stable than their beta-beta counterparts.

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Selected References

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