Synthesis and duplex stability of oligonucleotides containing adenine-guanine analogues
作者:Daniel M. Brown、Paul Kong Thoo Lin
DOI:10.1016/0008-6215(92)84156-m
日期:1992.9
converted into 5'-O-dimethoxytrityl 3'-(2-cyanoethyl N,N-diisopropylphosphoramidites). These monomers have been used in machine DNA synthesis to give a set of heptadecanucleotides containing up to three analogue nucleotides. The melting transitions (Tm) show that the 17-mer duplexes containing Z.T and Z.C base-pairs have closely similar stabilities, as have those containing K.T and K.C pairs. They are less
已经合成了核苷N6-甲氧基-2'-脱氧腺苷(dZ)和2-氨基-9-(2-脱氧-β-呋喃呋喃糖基)-6-甲氧基氨基嘌呤(dK)并转化为5'-O-二甲氧基三苯甲基3' -(2-氰基乙基N,N-二异丙基亚磷酰胺)。这些单体已用于机器DNA合成中,以提供一组含有多达三个类似核苷酸的七核苷酸。熔解温度(Tm)表明,含有ZT和ZC碱基对的17-mer双链体的稳定性与包含KT和KC对的17-mer双链体的稳定性非常相似。它们不如相应的完全互补双链体稳定,但比包含错配对的双链体稳定。在dZ的情况下,这与在甲基亚砜中观察到的核苷的氨基亚氨基互变异构体比率约为1:4一致。