Site-selective and hydrolytic two-strand scission of double-stranded DNA using Ce(IV)/EDTA and pseudo-complementary PNA

AUTOR(ES)

Yamamoto, Yoji

FONTE

Oxford University Press

RESUMO

By combining Ce(IV)/EDTA with two pseudo-complementary peptide nucleic acids (pcPNAs), both strands in double-stranded DNA were site-selectively hydrolyzed at the target site. Either plasmid DNA (4361 bp) or its linearized form was used as the substrate. When two pcPNAs invaded into the double-stranded DNA, only the designated portion in each of the two strands was free from Watson–Crick base pairing with the counterpart DNA or the pcPNA. Upon the treatment of this invasion complex with Ce(IV)/EDTA at 37°C and pH 7.0, both of these single-stranded portions were selectively hydrolyzed at the designated site, resulting in the site-selective two-strand scission of the double-stranded DNA. Furthermore, the hydrolytic scission products were successfully connected with foreign double-stranded DNA by using ligase. The potential of these artificial systems for manipulation of huge DNA has been indicated.

Documentos Relacionados

• Oligoamine–acridine conjugates for promotion of gap-selective DNA hydrolysis by Ce(IV)/EDTA complex
• Preferential hydrolysis of gap and bulge sites in DNA by Ce(IV)/EDTA complex
• Sequencing double-stranded DNA by strand displacement.
• Evidence that spontaneous mitotic recombination occurs at the two-strand stage.
• The rate of hydrolytic deamination of 5-methylcytosine in double-stranded DNA.