申请人:Milton John
公开号:US20090325172A1
公开(公告)日:2009-12-31
The invention provides modified nucleotide or nucleoside molecule comprising a purine or pyrimidine base and a ribose or deoxyribose sugar moiety having a removable 3′-OH blocking group covalently attached thereto, such that the 3′ carbon atom has attached a group of the structure —O-Z wherein Z is any of —C(R′)2-O—R″, —C(R′)2-N(R″)2, —C(R′)2-N(H)R″, —C(R′)2-S—R″ and —C(R′)2-F, wherein each R″ is or is part of a removable protecting group; each R′ is independently a hydrogen atom, an alkyl, substituted alkyl, arylalkyl, alkenyl, alkynyl, aryl, heteroaryl, heterocyclic, acyl, cyano, alkoxy, aryloxy, heteroaryloxy or amido group, or a detectable label attached through a linking group; or (R′)2 represents an alkylidene group of formula ═C(R′″)2 wherein each R′″ may be the same or different and is selected from the group comprising hydrogen and halogen atoms and alkyl groups; and wherein said molecule may be reacted to yield an intermediate in which each R″ is exchanged for H or, where Z is —C(R′)2-F, the F is exchanged for OH, SH or NH2, preferably OH, which intermediate dissociates under aqueous conditions to afford a molecule with a free 3′OH; with the proviso that where Z is —C(R′)2-S—R″, both R′ groups are not H.
该发明提供了一种经改性的核苷酸或核苷分子,包括嘌呤或嘧啶碱基和一个核糖或去氧核糖糖基团,其中可移除的3'-OH阻断基团共价连接在其上,使得3'碳原子上附有结构式为-O-Z的基团,其中Z是-C(R')2-O-R"、-C(R')2-N(R")2、-C(R')2-N(H)R"、-C(R')2-S-R"和-C(R')2-F中的任意一种,其中每个R"是或是可移除的保护基团的一部分;每个R'独立地是氢原子、烷基、取代烷基、芳基烷基、烯基、炔基、芳基、杂芳基、杂环、酰基、氰基、烷氧基、芳氧基、杂芳氧基或酰胺基,或通过连接基团连接的可检测标记;或(R')2表示公式═C(R' ")2的烷基亚甲基,其中每个R' "可以相同或不同,选自氢原子和卤素原子和烷基;其中所述分子可以反应生成一种中间体,在该中间体中,每个R"被交换为H或者当Z为-C(R')2-F时,F被交换为OH、SH或NH2,优选为OH,在水条件下,该中间体解离以得到具有自由3'OH的分子;但其中当Z为-C(R')2-S-R"时,两个R'基团不是H。