CN106715714A - 一种用于核酸随机片段化的引物及核酸随机片段化方法 - Google Patents
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Abstract
Description
测序读长数目(M) | 4.5 |
比对率 | 99.70% |
唯一比对的读长数目(M) | 4.5 |
基因组覆盖度 | 99.99% |
4X深度下基因组覆盖度 | 99.89% |
10X深度下基因组覆盖度 | 98.53% |
20X深度下基因组覆盖度 | 96.25% |
30X深度下基因组覆盖度 | 85.20% |
40X深度下基因组覆盖度 | 73.55% |
50X深度下基因组覆盖度 | 55.60% |
Claims (10)
- 一种用于核酸随机片段化的引物,其特征在于:所述引物由若干条上游随机引物和若干条下游随机引物组成;所述上游随机引物的序列组成为:5’-X-Y-3’;所述下游随机引物的序列组成为:5’-P-Y’-X’-close-3’;其中,Y和Y’为随机序列,X为测序平台的5’端接头的全部或部分序列,X’为测序平台的3’端接头的全部或部分序列,P为磷酸化修饰,close为用于阻止3-5磷酸二酯键形成的封闭修饰。
- 根据权利要求1所述的引物,其特征在于:所述封闭修饰为双脱氧修饰。
- 根据权利要求1所述的引物,其特征在于:所述上游随机引物的X序列的5’端还包括2-6个保护碱基;所述下游随机引物的X’序列3’端还包括2-6个保护碱基,并且所述封闭修饰在末端的一个保护碱基之上。
- 根据权利要求1所述的引物,其特征在于:所述上游随机引物的X序列具有Seq ID No.1所示序列,所述下游引物的X’序列具有Seq ID No.2所示序列;Seq ID No.1:5’-GACCGCTTGGCCTCCGACT-3’Seq ID No.2:5’-GTCTCCAGTCGAAGCCCGA-3’。
- 一种核酸随机片段化的方法,包括采用权利要求1-4任一项所述的引物对DNA样品进行双随机锚定,具体包括,将所述上游随机引物和所述下游随机引物杂交到变性的DNA样品上,在最相邻的上游随机引物和下游随机引物之间,通过DNA聚合酶的作用,上游随机引物向3’端延伸,将上游随机引物和下游随机引物之间的序列填满,然后在DNA连接酶的作用下,将上游随机引物延伸序列的3’端与下游随机引物的5’端连接起来,即将上游随机引物及其延伸序列与下游随机引物连接成一段,通过上游随机引物和下游随机引物的随机杂交实现对DNA样品的双随机打断。
- 根据权利要求5所述的方法,其特征在于:将所述上游随机引物和所述下游随机引物杂交到变性的DNA样品上的过程中,所述上游随机引物和所述下游随机引物的总用量为R×n皮摩尔,其中2.7≤R≤750,n=1.515×(m÷L),m为DNA样品的重量,单位为纳克,L为预计打断后的DNA片段长度,n为将DNA样品破碎至L长度的片段所需要的上游随机引物和下游随机引物理论用量,单位为皮摩尔。
- 根据权利要求6所述的方法,其特征在于:所述上游随机引物和所述下游随机引物的摩尔用量比为,上游随机引物:下游随机引物=1~3∶1,优选为2∶1,优选的R=20。
- 一种核酸文库的构建方法,包括采用权利要求5-7任一项所述的方法对DNA样品进行随机片段化,然后采用一对通用引物对双随机打断的DNA片段进行PCR扩增,即获得随机片段富集的核酸文库;所述通用引物由正向引物和反向引物组成,所述正向引物的3’端具有所述测序平台的5’端接头的全部或部分序列,所述反向引物的3’端具有所述测序平台的3’端接头的反向互补序列的全部或部分。
- 根据权利要求8所述的构建方法,其特征在于:所述正向引物和反向引物的5’端分别具有第二测序平台的接头序列。
- 根据权利要求8所述的构建方法,其特征在于:所述正向引物含有Seq ID No.1所示序列,所述反向引物含有Seq ID No.3所示序列;Seq ID No.3:5’-TCGGGCTTCGACTGGAGAC-3’。
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US20170275616A1 (en) | 2017-09-28 |
EP3208344A1 (en) | 2017-08-23 |
EP3208344B1 (en) | 2020-04-22 |
EP3208344A4 (en) | 2018-05-30 |
US10563196B2 (en) | 2020-02-18 |
CN106715714B (zh) | 2021-11-09 |
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