发明名称 一种新的基因组简化甲基化测序文库的制备方法
摘要 本发明公开了一种新的基因组简化甲基化测序文库的制备方法,该方法为:分别选取<i>EcoR</i>I/<i>Msp</i>I和<i>EcoR</i>I/<i>Hap</i>II两种双酶切组合对基因组DNA进行酶切,酶切后的片段进行纯化;设计特异的接头引物,对纯化后的DNA片段进行连接;连接后的产物分成两组,混合成两个池;将混合池样本进行纯化和琼脂糖凝胶电泳回收300~400bp的片段;利用所设计的特异PCR引物,对回收后的片段进行PCR富集和琼脂糖凝胶电泳回收,即得到测序文库。本发明具有高覆盖率、低冗余、高灵敏度、大规模样品、高性价比、结果可靠性高、实验可重复性好等优点,普遍适于常规分子生物学实验室进行各种基因组甲基化差异研究。
申请公布号 CN105256379A 申请公布日期 2016.01.20
申请号 CN201510822944.1 申请日期 2015.11.23
申请人 武汉大学 发明人 丁毅;张洪源
分类号 C40B50/06(2006.01)I;C12N15/10(2006.01)I 主分类号 C40B50/06(2006.01)I
代理机构 武汉科皓知识产权代理事务所(特殊普通合伙) 42222 代理人 常海涛
主权项 一种新的基因组简化甲基化测序文库的制备方法,其特征在于包括以下步骤:(1)提取同一物种不同组织或者相同组织不同发育时期的基因组DNA;(2)分别选取EcoRI/MspI和EcoRI/HpaII两种双酶切组合对不同样品的基因组DNA进行酶切;对酶切后的片段进行纯化;(3)用T4DNA连接酶连接EcoRI接头、纯化的酶切片段、MspI(HpaII)接头;EcoRI接头、MspI(HpaII)接头的序列如下:EcoR接头序列为:F1(5’‑3’):ACACTCTTTCCCTACACGACGCTCTTCCGATCTNNNNN,R1(5’‑3’):/5Phos/AATTNNNNNAGATCGGAAGAGCGTCGTGTAGGGAAAGAGTGT;MspI/HpaII接头序列为:F2(5’‑3’):GTGACTGGAGTTCAGACGTGTGCTCTTCCGATCT,R2(5’‑3’):/5Phos/CGAGATCGGAAGAGCGAGAACAA;其中,EcoRI接头序列中的NNNNN代表条码序列,F1、R1引物中的NNNNN为互补的序列,条码信息见表1,表1中条码序列与F1上的NNNNN五碱基序列相同,R1的NNNNN序列与条码序列反向互补;/5Phos/代表5’端起始碱基为磷酸基团修饰;表1.条码和指示标签信息表<tables num="0001" id="ctbl0001"><table><tgroup cols="6"><colspec colname="c001" colwidth="15%" /><colspec colname="c002" colwidth="14%" /><colspec colname="c003" colwidth="14%" /><colspec colname="c004" colwidth="15%" /><colspec colname="c005" colwidth="20%" /><colspec colname="c006" colwidth="22%" /><tbody><row><entry morerows="1">条码编号</entry><entry morerows="1">条码序列</entry><entry morerows="1">条码编号</entry><entry morerows="1">条码序列</entry><entry morerows="1">指示标签编号</entry><entry morerows="1">指示标签序列</entry></row><row><entry morerows="1">条码1</entry><entry morerows="1">GCATG</entry><entry morerows="1">条码25</entry><entry morerows="1">CTGCG</entry><entry morerows="1">指示标签1</entry><entry morerows="1">ATCACG</entry></row><row><entry morerows="1">条码2</entry><entry morerows="1">AACCA</entry><entry morerows="1">条码26</entry><entry morerows="1">CTGTC</entry><entry morerows="1">指示标签2</entry><entry morerows="1">CGATGT</entry></row><row><entry morerows="1">条码3</entry><entry morerows="1">CGATC</entry><entry morerows="1">条码27</entry><entry morerows="1">CTTGG</entry><entry morerows="1">指示标签3</entry><entry morerows="1">TTAGGC</entry></row><row><entry morerows="1">条码4</entry><entry morerows="1">TCGAT</entry><entry morerows="1">条码28</entry><entry morerows="1">GACAC</entry><entry morerows="1">指示标签4</entry><entry morerows="1">TGACCA</entry></row><row><entry morerows="1">条码5</entry><entry morerows="1">TGCAT</entry><entry morerows="1">条码29</entry><entry morerows="1">GAGAT</entry><entry morerows="1">指示标签5</entry><entry morerows="1">ACAGTG</entry></row><row><entry morerows="1">条码6</entry><entry morerows="1">CAACC</entry><entry morerows="1">条码30</entry><entry morerows="1">GAGTC</entry><entry morerows="1">指示标签6</entry><entry morerows="1">GCCAAT</entry></row><row><entry morerows="1">条码7</entry><entry morerows="1">GGTTG</entry><entry morerows="1">条码31</entry><entry morerows="1">GCCGT</entry><entry morerows="1">指示标签7</entry><entry morerows="1">CAGATC</entry></row><row><entry morerows="1">条码8</entry><entry morerows="1">AAGGA</entry><entry morerows="1">条码32</entry><entry morerows="1">GCTGA</entry><entry morerows="1">指示标签8</entry><entry morerows="1">ACTTGA</entry></row><row><entry morerows="1">条码9</entry><entry morerows="1">AGCTA</entry><entry morerows="1">条码33</entry><entry morerows="1">GGATA</entry><entry morerows="1">指示标签9</entry><entry morerows="1">GATCAG</entry></row><row><entry morerows="1">条码10</entry><entry morerows="1">ACACA</entry><entry morerows="1">条码34</entry><entry morerows="1">GGCCA</entry><entry morerows="1">指示标签10</entry><entry morerows="1">TAGCTT</entry></row><row><entry morerows="1">条码11</entry><entry morerows="1">AATTA</entry><entry morerows="1">条码35</entry><entry morerows="1">GGCTC</entry><entry morerows="1">指示标签11</entry><entry morerows="1">GGCTAC</entry></row><row><entry morerows="1">条码12</entry><entry morerows="1">ACGGT</entry><entry morerows="1">条码36</entry><entry morerows="1">GTAGT</entry><entry morerows="1">指示标签12</entry><entry morerows="1">CTTGTA</entry></row></tbody></tgroup></table></tables><tables num="0002" id="ctbl0002"><table><tgroup cols="6"><colspec colname="c001" colwidth="15%" /><colspec colname="c002" colwidth="14%" /><colspec colname="c003" colwidth="14%" /><colspec colname="c004" colwidth="15%" /><colspec colname="c005" colwidth="20%" /><colspec colname="c006" colwidth="22%" /><tbody><row><entry morerows="1">条码13</entry><entry morerows="1">ACTGG</entry><entry morerows="1">条码37</entry><entry morerows="1">GTCCG</entry><entry morerows="1">指示标签13</entry><entry morerows="1">AGTCAA</entry></row><row><entry morerows="1">条码14</entry><entry morerows="1">ACTTC</entry><entry morerows="1">条码38</entry><entry morerows="1">GTCGA</entry><entry morerows="1">指示标签14</entry><entry morerows="1">AGTTCC</entry></row><row><entry morerows="1">条码15</entry><entry morerows="1">ATACG</entry><entry morerows="1">条码39</entry><entry morerows="1">TACCG</entry><entry morerows="1">指示标签15</entry><entry morerows="1">ATGTCA</entry></row><row><entry morerows="1">条码16</entry><entry morerows="1">ATGAG</entry><entry morerows="1">条码40</entry><entry morerows="1">TACGT</entry><entry morerows="1">指示标签16</entry><entry morerows="1">CCGTCC</entry></row><row><entry morerows="1">条码17</entry><entry morerows="1">ATTAC</entry><entry morerows="1">条码41</entry><entry morerows="1">TAGTA</entry><entry morerows="1">指示标签17</entry><entry morerows="1">GTCCGC</entry></row><row><entry morerows="1">条码18</entry><entry morerows="1">CATAT</entry><entry morerows="1">条码42</entry><entry morerows="1">TATAC</entry><entry morerows="1">指示标签18</entry><entry morerows="1">GTGAAA</entry></row><row><entry morerows="1">条码19</entry><entry morerows="1">CGAAT</entry><entry morerows="1">条码43</entry><entry morerows="1">TCACG</entry><entry morerows="1">指示标签19</entry><entry morerows="1">GTGGCC</entry></row><row><entry morerows="1">条码20</entry><entry morerows="1">CGGCT</entry><entry morerows="1">条码44</entry><entry morerows="1">TCAGT</entry><entry morerows="1">指示标签20</entry><entry morerows="1">GTTTCG</entry></row><row><entry morerows="1">条码21</entry><entry morerows="1">CGGTA</entry><entry morerows="1">条码45</entry><entry morerows="1">TCCGG</entry><entry morerows="1">指示标签21</entry><entry morerows="1">CGTACG</entry></row><row><entry morerows="1">条码22</entry><entry morerows="1">CGTAC</entry><entry morerows="1">条码46</entry><entry morerows="1">TCTGC</entry><entry morerows="1">指示标签22</entry><entry morerows="1">GAGTGG</entry></row><row><entry morerows="1">条码23</entry><entry morerows="1">CGTCG</entry><entry morerows="1">条码47</entry><entry morerows="1">TGGAA</entry><entry morerows="1">指示标签23</entry><entry morerows="1">ACTGAT</entry></row><row><entry morerows="1">条码24</entry><entry morerows="1">CTGAT</entry><entry morerows="1">条码48</entry><entry morerows="1">TTACC</entry><entry morerows="1">指示标签24</entry><entry morerows="1">ATTCCT</entry></row></tbody></tgroup></table></tables>(4)分别将EcoRI/MspI酶切连接组和EcoRI/HpaII酶切连接组连接产物混合成两个池,将两个池样本进行纯化,纯化后的样本进行琼脂糖凝胶电泳,电泳完成后切胶回收片段大小为300~400bp的DNA片段;(5)利用含指示标签序列的PCR引物对回收的片段进行PCR富集,PCR产物通过琼脂糖凝胶电泳回收350~450bp的片段,回收的片段即为测序文库;PCR引物序列为:F3(5’‑3’):AATGATACGGCGACCACCGAGATCTACACTCTTTCCCTACACGACG,R3(5’‑3’):CAAGCAGAAGACGGCATACGAGATNNNNNNGTGACTGGAGTTCAGACGTGTGC;其中,PCR引物R3序列中的NNNNNN代表指示标签序列,指示标签信息见表1,表1中指示标签序列与R3引物中的NNNNNN六碱基序列反向互补。
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