Regulated incorporation of two different metal ions into programmed sites in a duplex by DNA polymerase catalyzed primer extension.
Metal-mediated base pairs formed by the coordination of metal ions to natural or artificial bases impart unique chemical and physical properties to nucleic acids and have attracted considerable interest in the field of nanodevices. Ag(I) ions were found to mediate DNA polymerase catalyzed primer extension through the formation of a C-Ag(I)-T base pair, as well as the previously reported C-Ag(I)-A base pair. The comparative susceptibility of dNTPs to Ag(I)-mediated enzymatic incorporation into the site opposite cytosine in the template was shown to be dATP>dTTP≫dCTP. Furthermore, two kinds of metal ions, Ag(I) and Hg(II), selectively mediate the incorporation of thymidine 5'-triphosphate into sites opposite cytosine and thymine in the template, respectively. In other words, the regulated incorporation of different metal ions into programmed sites in the duplex by DNA polymerase was successfully achieved.
Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094 (Japan).
Tatsuya
T
Funai
Junko
J
Nakamura
Yuki
Y
Miyazaki
Risa
R
Kiriu
Osamu
O
Nakagawa
Shun-ichi
S
Wada
Akira
A
Ono
Hidehito
H
Urata
D055162:Biocatalysis; D004247:DNA / Q000737:chemistry / Q000378:metabolism; D004259:DNA-Directed DNA Polymerase / Q000737:chemistry / Q000378:metabolism*; D007477:Ions / Q000737:chemistry; D008670:Metals / Q000737:chemistry* / Q000378:metabolism; D009690:Nucleic Acid Conformation
D007477:Ions; D008670:Metals; D004247:DNA; D004259:DNA-Directed DNA Polymerase
DNA polymerase; DNA structures; mercury; metal-mediated base pairing; silver