Duplex Stabilization of DNA: Oligonucleotides containing 7-substituted 7-deazaadenines
作者:Frank Seela、Horst Thomas
DOI:10.1002/hlca.19950780110
日期:1995.2.8
melting profiles and CD spectra of oligonucleotide duplexes, showing this major groove modification, were measured, and the Tm values as well as the thermodynamic data were determined. It was found that small substituents such as Br, Cl, or Me introduced in the 7-position of a 7-deazaadenine residue increase the duplex stability compared to oligonucleotides containing adenine.
制备了衍生自7-溴,7-氯和7-甲基取代的7-脱氮基2'-脱氧腺苷3b-d的寡核苷酸构件4b-d。它们用于寡核苷酸7-25的固相合成。同聚物d(A 12),交替的d [(AT)6 ]和回文的d(GTAGAATTCTAC)的dA残基被3b–d以及母体7-deaza-2'-脱氧腺苷(3a)。的熔解图谱和寡核苷酸双链体,表示该大沟变形例的CD光谱,测量,和Ť米确定了热值和热力学数据。已经发现,与含有腺嘌呤的寡核苷酸相比,引入到7-脱氮氮腺嘌呤残基的7-位的小的取代基,例如Br,Cl或Me,增加了双链体的稳定性。