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PNA-DNA chimeras forming quadruplex structures.

作者信息

Esposito Veronica, Galeone Aldo, Mayol Luciano, Messere Anna, Piccialli Gennaro, Randazzo Antonio

机构信息

Dipartimento di Chimica delle Sostanze Naturali, Università degli Studi di Napoli Federico II, Napoli, Italy.

出版信息

Nucleosides Nucleotides Nucleic Acids. 2003 May-Aug;22(5-8):1681-4. doi: 10.1081/NCN-120023112.

DOI:10.1081/NCN-120023112
PMID:14565494
Abstract

1H-NMR, CD, and UV spectroscopy have been used to investigate the structure of PNA/DNA chimeras forming quadruplex structures. In particular, we synthesized 5'TGGG3'-t (1) and 5'TGG3'-gt (2), where lower and upper case letters indicate PNA and DNA residues, respectively. CD spectrum and all NMR data of (1) are typical of quadruplexes involving four parallel strands. UV melting profile of (1) indicates that its thermal stability is quite similar to that observed for the reference structure [d(TGGGT)]4. 1H-NMR spectrum for 5'TGG3'-gt (2) shows that this oligonucleotide is not able to fold into a single, well-defined species.

摘要

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