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    • 22. 发明公开
    • CLOSED NUCLEIC ACID STRUCTURES
    • 封闭的核酸结构
    • EP3225698A1
    • 2017-10-04
    • EP17160148.7
    • 2012-09-06
    • Gen-Probe Incorporated
    • NELSON, Norman CCHELLISERRY, JijumonBRENTANO, Steven TLYAKHOV, DmitryFRIEDENBERG, MatthewSHAPIRO, Anne-Laure
    • C12Q1/68
    • C12P19/34C12Q1/6855C12Q1/6869C12Q2521/501C12Q2525/155C12Q2525/161C12Q2525/191C12Q2525/301C12Q2525/307C12Q2533/101
    • There is described a method of forming a closed nucleic acid structure comprising a segment of a target nucleic acid, the method comprising: (a) contacting a target nucleic acid with a primer pair under amplification conditions, each of the primers of the pair including a 5' phosphate group and a 3' segment, the 3' segments of the primers being target-binding segments; thereby forming an amplified nucleic acid comprising duplex target nucleic acid flanked by the primers of the pair duplexed with their complementary segments, wherein each strand of the amplified nucleic acid includes a 5' phosphate group and a 3' hydroxyl group; (b) denaturing the amplified nucleic acid and contacting a strand of the denatured amplified nucleic acid with a stem-loop adaptor having a 5' phosphate group, a 5' segment, a 3' segment having a stem-loop structure, and a 3' hydroxyl group, wherein the 5' segment is complementary to a segment at the 5' end of the amplified nucleic acid strand; (c) annealing the 5' segment of the stem-loop adaptor to the 5' end segment of the amplified nucleic acid strand, thereby forming a partially duplex, two-stranded intermediate structure wherein the 5' phosphate group of the amplified nucleic acid strand is separated by a nick from the 3' hydroxyl group of the stem-loop adaptor; and (d) providing a ligase that seals the nick between the 5' phosphate group of the amplified nucleic acid strand and the 3' hydroxyl group of the stem-loop adaptor and additionally links the 5' phosphate group of the stem-loop adaptor to the 3' hydroxyl group of the amplified nucleic acid strand, thereby forming a closed nucleic acid structure.
    • 描述了形成包含靶核酸片段的闭合核酸结构的方法,所述方法包括:(a)在扩增条件下使靶核酸与引物对接触,所述一对引物中的每一个均包含 5'磷酸基团和3'区段,引物的3'区段是靶标结合区段; 从而形成包含双链靶核酸的扩增核酸,所述双链靶核酸侧接与其互补链段复合的一对引物,其中扩增核酸的每条链包含5'磷酸基团和3'羟基; (b)使扩增的核酸变性,并使变性扩增核酸的链与具有5'磷酸基团,5'区段,具有茎环结构的3'区段和3'区段的茎环接头接触 '羟基,其中5'区段与扩增的核酸链5'末端的区段互补; (c)将茎环接头的5'区段退火至扩增的核酸链的5'端区段,由此形成部分双链体双链中间结构,其中扩增的核酸链的5'磷酸基团 通过茎环适配器的3'羟基的缺口分开; 和(d)提供连接酶,其将扩增的核酸链的5'磷酸基团与茎环适配体的3'羟基之间的切口密封并且另外将茎环适配体的5'磷酸基团连接到 扩增的核酸链的3'羟基,由此形成闭合的核酸结构。