CN107075508A - 使用鼓泡状接头元件构建测序文库的方法 - Google Patents
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Abstract
Description
填充系数 | 21% |
压力(PIP) | 500 |
脉冲系数 | 500 |
打断时间 | 20s,6次 |
10x多核苷酸激酶缓冲液 | 5.5ul |
25mM三磷酸脱氧核苷酸 | 3ul |
T4 DNA聚合酶 | 3ul |
T4多核苷酸激酶 | 3ul |
Klenow片段 | 1ul |
总体积 | 15.5ul |
10xBlue缓冲液(Enzymatics) | 5ul |
10mM ATP | 1ul |
Klenow(3`-5`exo-)酶 | 2ul |
无酶水 | 2ul |
总体积 | 10ul |
10x连接缓冲液(Enzymatics) | 5ul |
接头元件1(20uM) | 2ul |
总体积 | 7ul |
无酶水 | 5.8ul |
10X Taq缓冲液(Takara) | 11ul |
USER酶(1000U/ml) | 13.2ul |
总体积 | 30ul |
无酶水 | 1520ul |
10×TA缓冲液(epicentre公司) | 180ul |
总体积 | 1700ul |
无酶水 | 194ul |
T4 DNA连接酶(快速)(600U/ul)(enzymatics公司) | 6ul |
总体积 | 200ul |
无酶水 | 274ul |
10X NEBuffer3.1(NEB) | 36ul |
Ecop15 I内切酶(10U/ul) | 10ul |
总体积 | 320ul |
10x多核苷酸激酶缓冲液 | 5.5ul |
25mM三磷酸脱氧核苷酸 | 3ul |
T4 DNA聚合酶 | 3ul |
T4多核苷酸激酶 | 3ul |
Klenow片段 | 1ul |
总体积 | 15.5ul |
10xBlue缓冲液(Ezymatics) | 5ul |
10mM ATP | 1ul |
Klenow(3`-5`exo-)酶 | 2ul |
无酶水 | 2ul |
总体积 | 10ul |
无酶水 | 43ul |
桥序列 | 20ul |
总共 | 63ul |
Claims (10)
- 一种测序文库的构建方法,其特征在于,包括以下步骤:1)将双链DNA进行片段化,并对所得DNA片段进行平端修复、5’末端磷酸化和3’末端加碱基A;2)通过连接反应,在步骤1)所得DNA片段两端分别加上接头元件1;所述接头元件1包含一条核酸长链和一条核酸短链;所述核酸长链和核酸短链可退火形成两端序列互补、中间序列不互补而呈鼓泡状的杂交体;所述杂交体的核酸长链A的5’末端碱基经磷酸化修饰,所述杂交体的核酸短链B的3’末端带有突出的碱基T;所述接头元件1中具有III类限制性内切酶识别位点;3)以步骤2)所得DNA片段为模板,以分别针对接头元件1的核酸长链和核酸短链的部分序列的两条序列不同的核酸单链为引物,进行PCR扩增;所述两条引物的中部具有酶作用位点;优选地,所述酶作用位点为U或dU,对应的酶为USER酶;4)利用所述酶作用位点,在步骤3)所得扩增片段两端制造粘性末端,利用粘性末端,将扩增片段连接成环状核酸双链;5)用III类限制性内切酶酶切消化步骤4)所得环状核酸双链,回收酶切后的DNA片段;6)对步骤5)所得酶切后的DNA片段进行平端修复和3’末端加碱基A;7)通过连接反应,在步骤6)所得DNA片段两端分别加上接头元件2;所述接头元件2包含一条核酸长链和一条核酸短链;所述核酸长链和核酸短链可退火形成两端序列互补、中间序列不互补而呈鼓泡状的杂交体;所述杂交体的核酸长链A的5’末端碱基经磷酸化修饰,所述杂交体的核酸短链B的3’末端带有突出的碱基T;所述接头元件2的序列不同于接头元件1的序列;8)以步骤7)所得DNA片段为模板,以分别针对接头元件2的核酸长链和核酸 短链的部分序列的两条序列不同的核酸单链为引物,进行PCR扩增;其中一条引物的5’端第一个碱基带有磷酸化修饰,另一条引物的5’端第一个碱基带有生物素标记;9)利用亲和素磁珠回收步骤8)所得PCR产物,并进行变性处理,分离回收非生物素标记的核酸单链;优选地,所述亲和素磁珠为连霉亲和素磁珠;优选地,采用碱变性法或高温变性法;10)将步骤9)所得非生物素标记的核酸单链进行环化,形成单链环状核酸产物,即为测序文库;优选地,利用介导片段实现所述核酸单链的环化,所述介导片段具有相应互补序列用于连接核酸单链的两端;优选地,还包括在核酸单链环化完成后,消化线性单链的步骤;进一步优选地,用核酸外切酶1和/或3进行消化。
- 根据权利要求1所述的构建方法,其特征在于,步骤1)中,所述双链DNA片段是通过如下步骤制备的:1-1)对mRNA样本进行片段化处理,从而获得片段化的mRNA;1-2)对所述片段化的mRNA进行反转录,从而获得cDNA扩增产物,作为双链DNA片段;任选地,所述双链DNA片段直接由DNA样本进行片段化处理而得;优选地,所述片段化为利用物理方法或化学方法,对待测DNA进行随机打断或切断;进一步优选地,利用物理超声法或酶反应法进行待测DNA片段化;优选地,所述平端修复是利用T4 DNA聚合酶进行的;优选地,所述磷酸化是利用核苷酸激酶、优选T4多聚核苷酸激酶进行的;优选地,所述3’末端加碱基A是利用去除3’→5’外切酶活性的Klenow聚合酶进 行的。
- 根据权利要求1或2所述的构建方法,其特征在于,所述接头元件1中的III类限制性内切酶为Acu I、Bpm I、BceA I、Bbv I、BciV I、BpuE I、BseM II、BseR I、Bsg I、BsmF I、BtgZ I、Eci I、EcoP15 I、Eco57M I、Fok I、Hga I、Hph I、Mbo II、Mnl I、SfaN I、TspDT I、TspDW I或Taq II;优选地,所述III类限制性内切酶的识别位点距离所述杂交体的3’末端0-2 bp;优选地,所述接头元件1的核酸长链中包含标签序列;进一步优选地,所述标签序列长度为6-10nt。
- 根据权利要求1-3任一项所述的构建方法,其特征在于,所述接头元件1的核酸长链的序列为:5’-/Phos/ACTGCTGAGTCGAGA(N)CTGACAAGGTCGCCAGCCCTGAGTGCTTCGAA-3’;其中/Phos/表示磷酸化修饰,N为标签序列;优选地,所述标签序列长度为6nt-10nt;进一步优选地,所述标签序列为5’-TGTCATAAAT-3’;其核酸短链的序列为:5’-CGAAGCACTCA AGGTCGCCAGCCCTCAGTACGTCAGCAGTT-3’。
- 根据权利要求4所述的构建方法,其特征在于,步骤3)中,PCR扩增所用引物分别为:正向引物:5’-AGGUCGCCAGCCCUCAGTAC-3’;反向引物:5’-AGGGCUGGCGACCUTGTCAG-3’。
- 根据权利要求1-5任一项所述的构建方法,其特征在于,所述接头元件2的核酸长链的序列为:5’-/Phos/AGTCGGAGGCCAAGCGTGCTTAGGATGAGTGCTCTCGAA-3’,其中/Phos/表示磷酸化修饰;所述核酸短链的序列为:5’-CGAGAGCACTCCATGTAGTGTACGATCCGACTT-3’。
- 根据权利要求6所述的构建方法,其特征在于,步骤8)中,PCR扩增所用引物分别为:正向引物:5’-TCCTAAGCACGCTTGGCCT-3’;反向引物:5’-CATGTAGTGTACGATCCGACTT-3’;所述正向引物的5’端第一个碱基带有生物素标记,所述反向引物的5’端第一个碱基具有磷酸化修饰;优选地,步骤10)中,所述介导片段的序列为:5’-GTACACTACATGTCCTAAGCACGC-3’。
- 一种测序文库,其特征在于,由权利要求1-7任一项所述构建方法制得。
- 如权利要求8所述测序文库在基因组测序、优选地在目标基因组区域测序中的应用;优选地,使用单链环状文库测序平台进行测序;进一步优选地,使用Complete Genomics公司的测序平台进行测序。
- 一种核酸测序方法,其特征在于,包括将权利要求8所述的测序文库进行测序的步骤;优选地,使用单链环状文库测序平台进行测序;进一步优选地,使用Complete Genomics公司的测序平台进行测序;优选地,还包括将测序结果进行组装和/或拼接的步骤。
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CN109722471A (zh) * | 2017-10-27 | 2019-05-07 | 深圳华大智造科技有限公司 | 改善文库滚环复制效率均一性的方法、文库构建方法及试剂盒 |
CN112176422A (zh) * | 2020-10-19 | 2021-01-05 | 天津诺禾致源生物信息科技有限公司 | Rna文库的构建方法 |
CN115992205A (zh) * | 2023-02-23 | 2023-04-21 | 华智生物技术有限公司 | 一种用于多样品pooling建库的接头、试剂盒及建库方法 |
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AU2014406026B2 (en) * | 2014-09-12 | 2018-08-23 | Mgi Tech Co., Ltd. | Isolated oligonucleotide and use thereof in nucleic acid sequencing |
CN107124888B (zh) | 2014-11-21 | 2021-08-06 | 深圳华大智造科技股份有限公司 | 鼓泡状接头元件和使用其构建测序文库的方法 |
WO2018090373A1 (zh) * | 2016-11-21 | 2018-05-24 | 深圳华大智造科技有限公司 | 一种dna末端修复与加a的方法 |
CN108660135B (zh) * | 2017-03-31 | 2022-09-02 | 天津华大医学检验所有限公司 | 一种用于dna建库的试剂盒及其应用 |
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