H-1-NMR, CD, and UV spectroscopy have been used to investigate the structure of PNA/DNA chimeras forming quadruplex structures. In particular, we synthesized (5')TGGG(3')-t (1) and (5')TGG(3')-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). H-1-NMR spectrum for (5')TGG(3')-gt (2) shows that this oligonucleotide is not able to fold into a single, well-defined species.
PNA-DNA chimeras forming quadruplex structures / Esposito, Veronica; Galeone, Aldo; Mayol, Luciano; A., Messere; Piccialli, Gennaro; Randazzo, Antonio. - In: NUCLEOSIDES, NUCLEOTIDES & NUCLEIC ACIDS. - ISSN 1525-7770. - 22:(2003), pp. 1681-1684. [10.1081/NCN-120023112]
PNA-DNA chimeras forming quadruplex structures
ESPOSITO, VERONICA;GALEONE, ALDO;MAYOL, LUCIANO;PICCIALLI, GENNARO;RANDAZZO, ANTONIO
2003
Abstract
H-1-NMR, CD, and UV spectroscopy have been used to investigate the structure of PNA/DNA chimeras forming quadruplex structures. In particular, we synthesized (5')TGGG(3')-t (1) and (5')TGG(3')-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). H-1-NMR spectrum for (5')TGG(3')-gt (2) shows that this oligonucleotide is not able to fold into a single, well-defined species.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
