CN102099488A - 利用聚合酶-内切酶链式反应扩增寡核苷酸和小rna的方法 - Google Patents
利用聚合酶-内切酶链式反应扩增寡核苷酸和小rna的方法 Download PDFInfo
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Abstract
Description
Claims (11)
- WO 2010/075659 权. 禾 ij 要 求 书 PCT/CN2009/0003621、 一种利用聚合酶-内切酶链式反应扩增寡核苷酸和小 RNA的方法, 该方法包括:(1) 反应混合物的构成:①包含目标序列 X的目标核酸, 目标核酸为单链或双链核酸, 目标序列 X长度为 8〜50碱基 或碱基对, 其解链温度即 Tm值的范围为 36〜79Ό;②探针 X' R' X' , 其中 X' 为与目标序列 X互补的序列, 探针 X' R' X' 是单链 DNA, 含有 两个串联重复的 X' ,在这两个重复序列之间有一个限制性内切酶的识别位点的互补序列 R' ;③耐热 DNA聚合酶;④耐热限制性内切酶;⑤四种三磷酸脱氧核糖核苷酸: dATP, dGTP, dCTP和 dTTP;⑥适当的缓冲液;(2)热循环反应: 将所述反应混合物在 6CTC至 99°C预变性 0〜600秒后, 再进行 1至 100个热循 环处理, 热循环包括如下 4个步骤:①变性(Denaturing): 保温于高于目标核酸分子的解链温度即 Tm值 5Ό以上的温度, 温度 范围为 60〜99°C, 持续时间 1〜60秒;②退火(Annealing): 保温于目标核酸分子的解链温度即 Tm值上下 5°C以内的温度, 温度 范围为 35〜68 °C, 持续时间 1〜60秒;③延伸(Elongation): 保温于高于目标核酸分子的解链温度即 Tm值 5°C以上的温度, 且为 所述 DNA聚合酶的最适工作温度, 范围为 45〜89°C, 持续时间 1〜60秒:④切割(Cleaving): 保温于高于目标核酸分子的解链温度即 Tm值 5°C以上的温度, 且为所 述限制性内切酶的最适工作温度, 范围为 45〜89°C, 持续时间 1〜300秒- 所述步骤①、 ③、 ④的温度均高于步骤②的退火温度, 至少相差 10Ό。 按照①至④进行 变性、 退火、 延伸和切割, 使目标分子成倍扩增, 扩增产物是双链分子 XRX/X' R' X' , 双链 目标分子 X/X' 或单链目标分子 X。
- 2、 根据权利要求 1所述的利用聚合酶-内切酶链式反应扩增寡核苷酸和小 RNA的方法, 其 特征在于: 所述耐热 DNA聚合酶没有链置换活性, 所述耐热限制性内切酶是双链内切酶。
- 3、 根据权利要求 1所述的利用聚合酶-内切酶链式反应扩增寡核苷酸和小 RNA的方法, 其 特征在于: 所述的目标核酸为 DNA分子, 包括寡核苷酸、 基因组 DNA、 线粒体 DNA、 由 mRNA、 microRNA或 siRNA逆转录而来的 cDNA、 以及其它任何人工合成的或者天然的 DNA分子。4、 根据权利要求 1所述的利用聚合酶-内切酶链式反应扩增寡核苷酸和小 RNA的方法, 其 特征在于: 所述目标核酸为 RNA分子, 包括 mRNA、 niicroRNA和 siRNA, 以及其它任何 RNA分子, 同时在所述反应混合物中包含一种能够直接延伸 RNA分子的 DNA聚合酶。5、 根据权利要求 1所述的利用聚合酶-内切酶链式反应扩增寡核苷酸和小 RNA的方法, 其 特征在于: 所述探针含有两个或两个以上串联重复的目标序列的互补序列 , ( Α ' ) , 在这些重 复序列之间均有一个耐热内切酶的识别位点 (R ' ) , 其通式为 A ' - (R ' A ' )„, 其中 η为大于 1的正整数。6、 根据权利要求 1所述的利用聚合酶-内切酶链式反应扩增寡核苷酸和小 RNA的方法, 其 特征在于: 所述探针含有两种或两种以上不同的目标序列的互补序列 (Α ' , B ' , C ' ) , 在 这些序列之间至少有一个耐热内切酶的识别位点 (R ' ) , 其通式为 A ' - (R ' B ' )„, B ' R ' A ' - (R, Β, )„, 或 A ' R ' B, -(R, C )„, 其中 n为大于或等于 1的正整数。
- 7、 根据权利要求 1所述的利用聚合酶-内切酶链式反应扩增寡核苷酸和小 RNA的方法, 其 特征在于: 所述探针末端或中间含有同位素标记的核苷酸。
- 8、 根据权利要求 1所述的利用聚合酶-内切酶链式反应扩增寡核苷酸和小 RNA的方法, 其特征在于: 所述反应混合物中加入一种与双链 DNA特异性结合的荧光染料。
- 9、 根据权利要求 1所述的利用聚合酶-内切酶链式反应扩增寡核苷酸和小 RNA的方法, 其特征在于: 所述探针末端或中间连接有化学基团。
- 10、根据权利要求 9所述的利用聚合酶-内切酶链式反应扩增寡核苷酸和小 RNA的方法, 其 特征在于: 所述化学基团之一是荧光基团。
- 1 1、根据权利要求 1所述的利用聚合酶-内切酶链式反应扩增寡核苷酸和小 RNA的方法, 其 特征在于: 所述目标核酸末端或中间含有荧光基团。
- 12、根据权利要求 1所述的利用聚合酶-内切酶链式反应扩增寡核苷酸和小 RNA的方法, 其 特征在于: 所述探针中的酶切位点被甲基化。
- 13、 根据权利要求 1所述的利用聚合酶-内切酶链式反应扩增寡核苷酸和小■的方法, 其特征在于: 所述探针被固定在基因芯片或其他固体材料表面。
- 14、 根据权利要求 1所述的利用聚合酶-内切酶链式反应扩增寡核苷酸和小 RNA的方法, 其特征在于: 所述探针末端与纳米材料连接。
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CN105004780A (zh) * | 2015-07-14 | 2015-10-28 | 中国科学院苏州生物医学工程技术研究所 | 基于恒温反应的针对待测液中microRNA的检测方法 |
CN107075585A (zh) * | 2014-10-14 | 2017-08-18 | 雅培日本有限公司 | 具有锁核酸的序列转换和信号扩增dna以及使用其的检测方法 |
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Effective date of registration: 20210507 Address after: LifeI medical device innovation park, No.7 Fenglong Road, high tech Zone, Qingdao, Shandong Province 266000 Patentee after: SHANDONG LIFEI BIOLOGICAL INDUSTRY Co.,Ltd. Address before: 266000 909-910, block B, entrepreneurial building, incubation base, entrepreneurial service center, Qingdao high tech Industrial Development Zone, Shandong Province Patentee before: QINGDAO QIANZHUO MOLECULAR BIOTECHNOLOGY Co.,Ltd. |