CN106661575A - 一种接头元件和使用其构建测序文库的方法 - Google Patents
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Abstract
Description
填充系数 | 20% |
剧烈度 | 5 |
脉冲系数 | 200 |
打断时间 | 60s,5次 |
37℃ | 45min |
65℃ | 10min |
三羟甲基氨基甲烷-盐酸(pH 7.8) | 150mM |
聚乙二醇8000 | 15% |
氯化镁 | 30mM |
核糖核苷三磷酸 | 3mM |
25℃ | 20min |
65℃ | 10min |
95℃ | 3min |
95℃ | 30s |
56℃ | 30s |
72℃ | 90s |
68℃ | 7min |
无酶水 | 43μ1 |
核酸单链E | 20μ1 |
总共 | 63μ1 |
浓度(ng/μl) | 总量(ng) | |
产物1 | 0.40 | 16 |
产物2 | 0.42 | 16.8 |
产物3 | 0.48 | 19.2 |
Claims (17)
- 一种接头元件,其特征在于,由接头A和接头B组成,所述接头A由一条核酸长链与一条核酸短链互补配对而成,其长链5’端具有磷酸修饰,短链3’端为封闭修饰,其短链中具有酶作用位点;所述接头B为一条核酸单链,其3’端能与接头A长链5’端互补配对,其余部分则无法与接头A互补配对。
- 根据权利要求1所述的接头元件,其特征在于,所述接头A长链为40-48bp,接头A短链为9-14bp;优选地,所述接头B中,与接头A长链互补的长度为6-12bp,与接头A长链不互补的长度为9-15bp;优选地,所述封闭修饰为双脱氧封闭修饰;优选地,所述短链中的酶作用位点为U或dU,对应的酶为User酶;优选地,所述接头B中具有标签序列。
- 一种接头连接方法,其特征在于,将权利要求1或2所述的接头元件连接在待测DNA片段两端。
- 根据权利要求3所述的接头连接方法,其特征在于,依次包括如下步骤:(1)通过连接反应,将所述接头A加在待测DNA片段的两端;(2)根据短链中的酶作用位点,用相应酶处理接头A连接后的DNA片段;(3)通过连接反应,在经过步骤(2)处理的接头A连接后的DNA片段两端加上接头B。
- 根据权利要求4所述的接头连接方法,其特征在于,在所述接头元件连接前,还包括将待测DNA片段进行去磷酸化和平端修复的步骤。
- 根据权利要求5所述的接头连接方法,其特征在于,在步骤(2)中,还包括对所述DNA片段未连接的5’端进行磷酸化处理的步骤;优选地,使用多聚核苷酸激酶进行磷酸化处理。
- 一种测序文库的构建方法,其使用如权利要求1或2所述的接头元件或使用如权利要求3-6任一项所述的接头连接方法进行接头连接。
- 根据权利要求7所述的构建方法,其特征在于,包括以下步骤:1)将待测DNA进行片段化;2)对步骤1)所得DNA片段进行去磷酸化和平端修复;3)接头连接:接头A连接:通过连接反应,在步骤2)所得DNA片段两端加上接头A;酶处理、磷酸化:根据接头A短链中的酶作用位点,用相应酶处理接头A连接后的DNA片段,并对片段未连接的5’端进行磷酸化处理;接头B连接:通过连接反应,在接头A连接后的DNA片段两端加上接头B;4)DNA片段扩增:以步骤3)所得DNA片段为模板,以与接头A长链、接头B核酸链互补配对的核酸单链C、D为引物,进行聚合酶链式反应;5)杂交捕获:用寡核苷酸探针对步骤4)所得产物进行杂交捕获,并在杂交产物的富集步骤中,在核酸双链的一条链5’端引入分离标记,另一条链5’端引入磷酸基团修饰;6)单链分离及环化:利用分离标记对步骤8)所得产物进行分离,获得无分离标记的另一条核酸单链;环化所得核酸单链,得单链环状核酸产物,即为测序文库。
- 根据权利要求8所述的构建方法,其特征在于,步骤1)中,所述待测DNA为基因组DNA;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;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DNA片段的长度为150-250bp。
- 根据权利要求8所述的构建方法,其特征在于,步骤2)中,所述去磷酸化是利用碱性磷酸酶、优选虾碱性磷酸酶进行的;优选地,所述平端修复是利用T4DNA聚合酶进行的。
- 根据权利要求8所述的构建方法,其特征在于,步骤5)中,所述寡核苷酸探针为寡核苷酸探针库;优选地,分离标记为生物素修饰。
- 一种测序文库,其特征在于,由权利要求7-11任一项所述构建方法制得。
- 如权利要求12所述测序文库在基因组测序中的应用,优选地,在目标基因组区域测序中的应用。
- 根据权利要求13所述的应用,其特征在于,使用单链环状文库测序平台进行测序;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12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。
- 一种测序文库构建试剂盒,其特征在于,包括权利要求1或2所述的接头元件。
- 根据权利要求16所述的试剂盒,其特征在于,所述试剂盒还包括去磷酸化酶,优选碱性磷酸酶,更优选虾碱性磷酸酶;DNA聚合酶,优选T4DNA聚合酶;User酶;和磷酸化酶,优选多聚核苷酸激酶。
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CN110734967A (zh) * | 2018-07-19 | 2020-01-31 | 深圳华大智造科技有限公司 | 一种接头组合物及其应用 |
CN111041026A (zh) * | 2019-12-26 | 2020-04-21 | 北京优迅医学检验实验室有限公司 | 一种高通量测序用核酸接头和文库构建方法 |
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US20170233728A1 (en) | 2017-08-17 |
JP2017527295A (ja) | 2017-09-21 |
EP3208336A4 (en) | 2018-06-20 |
JP6430631B2 (ja) | 2018-11-28 |
CN106661575B (zh) | 2020-03-24 |
EP3208336B1 (en) | 2019-11-13 |
AU2014409073B2 (en) | 2019-04-04 |
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