Fluorescent α-Anomeric 1,N(6)Etheno- Deoxyadenosine in DNA Duplexes. the α-εdA / dG Pair
摘要:
Structural properties of the fluorescent alpha -anomeric 1,N(6)ethenodeoxyadenosine residue placed in opposition to all four canonical deoxynucleotide units within 11-mer DNA duplexes have been studied. The duplex with alpha-epsilon dA / dG pairing is most thermodynamically stable while the alpha-epsilon dA/dC one is the least stable. Fluorescence measurements confirm. the thermodynamic data and indicate base-pair dependent stacking properties of alpha-epsilon dA within duplex structures. Results of molecular dynamics (MD) simulations in aqueous solution for the most stable duplex point to the presence of different conformational states of the alpha -1,N(6)etheno-deoxyadenosine residue, including formation of a hydrogen bonded pair with the dG and possible occurrence of severe kinking in the duplex.
Fluorescent α-Anomeric 1,N(6)Etheno- Deoxyadenosine in DNA Duplexes. the α-εdA / dG Pair
作者:L. Bielecki、B. Skalski、I. Zagórowska、R. E. Verrall、R. W. Adamiak
DOI:10.1080/15257770008045456
日期:2000.10
Structural properties of the fluorescent alpha -anomeric 1,N(6)ethenodeoxyadenosine residue placed in opposition to all four canonical deoxynucleotide units within 11-mer DNA duplexes have been studied. The duplex with alpha-epsilon dA / dG pairing is most thermodynamically stable while the alpha-epsilon dA/dC one is the least stable. Fluorescence measurements confirm. the thermodynamic data and indicate base-pair dependent stacking properties of alpha-epsilon dA within duplex structures. Results of molecular dynamics (MD) simulations in aqueous solution for the most stable duplex point to the presence of different conformational states of the alpha -1,N(6)etheno-deoxyadenosine residue, including formation of a hydrogen bonded pair with the dG and possible occurrence of severe kinking in the duplex.