CN106520831B - 一种哺乳动物基因组修饰方法 - Google Patents
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Abstract
一种哺乳动物基因组修饰方法,属于基因工程技术领域。本发明根据研究目的选定哺乳动物基因组上特定区域的靶基因DNA序列,设计识别靶基因DNA序列的一对单链DNA寡核苷酸然后与本发明构建的质粒载体pcDNA‑DN按照质量比1‑2:1‑2:5‑20的比例共转染哺乳动物细胞,48小时后提取基因组DNA,PCR扩增并克隆测序,检测靶标区域序列的突变比例。与现有技术相比,本发明通过合成一对短链向导DNA引导核酸酶X在细胞或个体水平上对哺乳动物特定基因进行切割以达到敲除或修饰某一基因的目的,从而解析基因的功能、构建基因突变库。有益效果在于,向导DNA的总长度为40nt以上,极大增加了基因组修饰的特异性。
Description
技术领域
本发明属于基因工程技术领域,具体而言,涉及一种哺乳动物基因组修饰方法。
背景技术
ZFN、TALEN及CRISPR/Cas9打靶技术是目前研究较为成熟的几种基因组修饰技术。(CRISPR)/CRISPR-associated(Cas)是细菌和古细菌一种不断进化适应的免疫防御机制。CRISPR/Cas9利用一段小RNA来识别并剪切DNA以降解外来核酸分子。Cong等(MultiplexGenome Engineering Using CRISPR/Cas Systems.Science.2013)及Mali等(RNA-guidedhuman genome engineering via Cas9.Science.2013)证明Cas9系统能在293T、K562、iPS等多种细胞中,进行有效的靶向酶切,非同源重组(NHEJ)、同源重组(HR)效率在3-25%之间,与TALEN酶切效果相当。他们还证明,多个靶点可以同时进行靶向酶切。但是,随后的研究表明,Cas9存在较为明显的脱靶效应(High-frequency off-target mutagenesisinduced by CRISPR-Cas nucleases in human cells.Nature Biotechnology.Fu et al,2013;High-throughput profiling of off-target DNA cleavage reveals RNA-programmed Cas9nuclease specificity.Nature Biotechnology.Pattanayak et al,2013)。因此,开发出新的基因组修饰工具势在必行。
发明内容
本发明的目的在于克服现有技术的不足,提供一种新的哺乳动物基因组修饰方法。本发明针对某一特定靶点,设计识别这一靶点的一对单链DNA寡核苷酸,与质粒载体pcDNA-DN共转染哺乳动物细胞,对哺乳动物基因组上特定位点的序列进行修饰,从而达到失活或修改某一基因的目的。
具体地本发明是通过如下技术方案实现的:
一种哺乳动物基因组修饰方法,包括如下步骤:
1)根据研究目的选定哺乳动物基因组上特定区域的靶基因DNA序列;
2)设计识别靶基因DNA序列的一对单链DNA寡核苷酸,这一对单链DNA寡核苷酸除3'末端的一个碱基外分别与靶基因DNA不同区段的正义链和反义链互补;
3)步骤2)中所述的一对单链DNA寡核苷酸与质粒载体pcDNA-DN按照质量比1-2:1-2:5-20共转染哺乳动物细胞,所述pcDNA-DN序列如SEQ ID NO.2所示。
具体地,步骤3)中的质粒载体pcDNA-DN是通过如下步骤构建的:
a合成DNA片段DN,其序列如SEQ ID NO.1所示;
b片段DN通过BamHⅠ与EcoRⅠ双酶切克隆到pcDNA3.1(+)载体的相应多克隆位点,通过测序验证,获得质粒载体pcDNA-DN,正向测序引物pcDNA3.1-F其序列如SEQ ID NO.3所示,反向测序引物pcDNA3.1-R其序列如SEQ ID NO.4所示。
进一步地步骤2)中的一对单链DNA寡核苷酸长度是20-30nt。
本发明针对哺乳动物基因组上特定区域的(根据各自目的确定靶基因)DNA序列,合成一对单链DNA寡核苷酸(20-30nt),与质粒载体pcDNA-DN(其作用是表达核酸酶X,X的氨基酸序列如SEQ ID NO.20所示)按照质量比1-2:1-2:5-20的比例共转染哺乳动物细胞,48小时后提取基因组DNA,PCR扩增并克隆测序,检测靶标区域序列的突变比例。
与现有技术相比,本发明提供了一种哺乳动物基因组修饰方法,通过合成一对短链向导DNA引导核酸酶X在细胞或个体水平上对哺乳动物特定基因进行切割以达到敲除或修饰某一基因的目的,从而解析基因的功能、构建基因突变库。本发明的有益效果在于,向导DNA的总长度为40nt以上,极大增加了基因组修饰的特异性。
附图说明
图1为MSH2TF、MSH2TR与pcDNA-DN共转染293T细胞系,48小时后提取基因组DNA进行PCR扩增,将PCR产物克隆后的部分测序结果(突变序列);
图2为Tada1TF、Tada1TR与pcDNA-DN共转染NIH/3T3细胞系,48小时后提取基因组DNA进行PCR扩增,将PCR产物克隆后的部分测序结果(突变序列);
图3为RELATF、RELATR与pcDNA-DN共转染PIEC细胞系,48小时后提取基因组DNA进行PCR扩增,将PCR产物克隆后的部分测序结果(突变序列)。
具体实施方式
以下的实施例便于更好地理解本发明,但并不限定本发明。下述实施例中的实验方法,如无特殊说明,均为常规方法。下述实施例中所用的试验材料,如无特殊说明,均为自常规生化试剂商店购买得到的。以下实施例中,如无特殊说明,均采用低糖DMEM培养基培养细胞。内切酶均购自NEB公司。
DNA片段及引物均由北京六合华大基因科技股份有限公司合成。
实施例1质粒载体pcDNA-DN的构建
合成DNA片段DN(其序列如SEQ ID NO.1所示),通过BamHⅠ与EcoRⅠ双酶切克隆到pcDNA3.1(+)载体(购自Invitrogen,货号V79020)的多克隆位点,获得质粒载体pcDNA-DN。通过测序验证,证实其序列信息如SEQ ID NO.2所示,所用正向测序引物pcDNA3.1-F的序列如SEQ ID NO.3所示;反向测序引物pcDNA3.1-R的序列如SEQ ID NO.4所示。
pcDNA3.1-F:CTAGAGAACCCACTGCTTAC,pcDNA3.1-R:TAGAAGGCACAGTCGAGG;
实施例2本基因组修饰方法在人细胞系293T中的基因修饰效率验证
人细胞系293T,购自中国科学院上海细胞库,目录号:SCSP-502。
人MSH2基因的第一外显子序列(其序列如SEQ ID NO.5所示):
选取上述序列120-180bp区段作为靶标,针对这一靶标设计并合成2条DNA寡核苷酸MSH2TF与MSH2TR(其序列如SEQ ID NO.6-7所示),这两条寡核苷酸分别与上述序列131-153bp区域的反义链、161-180bp区域的正义链互补配对(3'末端最后一个碱基除外),如下:
MSH2TF:GGTGGAGCCGAAGGAGACGCTGCC,MSH2TR:AGCCGACCTCGGCCGCGCTCG;
将MSH2TF、MSH2TR与pcDNA-DN载体按照1:1:5的比例转染人细胞系293T,48小时后,提取细胞基因组DNA,使用引物对MSH2F、MSH2R(其序列如SEQ ID NO.8-9所示)进行PCR扩增,对获得的258bp的PCR产物进行克隆测序。共挑取20个单克隆菌落测序,其中有6个单克隆的序列发生改变(如附图1所示)。该结果表明,MSH2TF、MSH2TR与pcDNA-DN载体混合转染对人细胞系293T的敲除效率达到30%。
MSH2F:TTGGGTGTGGTCGCCGT,MSH2R:CCGTGCGCCGTATAGAAGTC;
实施例3本基因组修饰方法在小鼠细胞系NIH/3T3中的基因修饰效率验证
小鼠细胞系NIH/3T3,购自中国科学院上海细胞库,目录号:SCSP-515。
小鼠Tada1基因的第一外显子序列(其序列如SEQ ID NO.10所示)如下:
1 agagccgagc cgagccgagc cgagcggagc cgagccgagc cgagcggagc cgagccgagc
61 cgagccgagc cgaaccgagc cgagccgagc cgaaccgagc cgagccgagc cgagtggaat
121 cgagtcgagt cgagcctcca gcgtccggcg cgcaggcctt ccgccgcgtt gatctttcgg
181 ttgctggtgg ccgtgggccg cgcggtctac ggtcgggctg aaagacgcgc gctgcaatgg
241 cgacctttgt gagcgagctg gaggcagcca agaagaactt gagcgaggcg ctgggggaca
301 acgtgaaaca
选取上述序列的200-280bp区段作为基因修饰的靶标,针对这一靶标设计并合成两条DNA寡核苷酸Tada1TF与Tada1TR(其序列如SEQ ID NO.11-12所示),这两条寡核苷酸分别与上述序列211-233bp区域的反义链、245-279bp区域的正义链互补配对(3'末端最后一个碱基除外),如下:
Tada1TF:GGTCGGGCTG AAAGACGCCC GCTA,Tada1TR:GGCTGCCTCCAGCTCGCTCACAAAGT;
将Tada1TF、Tada1TR与pcDNA-DN载体按照1:2:20的比例转染小鼠细胞系NIH/3T3,48小时后,提取细胞基因组DNA,使用引物对Tada1F、Tada1R(其序列如SEQ ID NO.13-14所示)进行PCR扩增,对获得的157bp的PCR产物进行克隆测序。共挑取20个单克隆菌落测序,其中有5个单克隆的序列发生改变(如附图2所示)。该结果表明,Tada1TF、Tada1TR与pcDNA-DN载体混合转染对小鼠细胞系NIH/3T3的敲除效率达到25%。
Tada1F:CGCGTTGATCTTTCGGTTGC,Tada1R:GCGGCTCTTACTGTTTCACG;
实施例4本基因组修饰方法在猪细胞系PIEC中的基因修饰效率验证
猪血管内皮细胞系,购自中国科学院上海细胞库,目录号:GNO15。
猪RELA基因的第二外显子序列(其序列如SEQ ID NO.15所示)如下:
gccggccccg gcctcgggcc cctatgtgga gatcatcgag cagcccaagc
181 agcggggcat gcgcttccgc tacaagtgcg agggccgctc agccggcagt atcccgggcg
241 agaggagcac ggataccacc aagacccacc ccaccatcaa g
选取上述序列180-240bp区段作为基因修饰的靶标,针对这一靶标设计合成2条DNA寡核苷酸RELATF和RELATR(其序列如SEQ ID NO.16-17所示),这两条寡核苷酸分别与上述序列185-207bp区域的反义链、213-233bp区域的正义链互补配对(3'末端最后一个碱基除外),如下:
RELATF:GGGCATGCGCTTCCGCTACAAGC,RELATR:GATACTGCCGGCTGAGCGGCCT;
将RELATF、RELATR与pcDNA-DN载体按照1:1:10的比例转染猪细胞系PIEC,48小时后,提取细胞基因组DNA,使用引物对RELAF、RELAR(其序列如SEQ ID NO.18-19所示)进行PCR扩增,对获得的316bp的PCR产物进行克隆测序。共挑取20个单克隆菌落测序,其中有6个单克隆的序列发生改变(如附图3所示)。该结果表明,RELAF、RELAR与pcDNA-DN载体混合转染对猪细胞系PIEC的敲除效率达到30%。
RELAF:TTCCCCTCGGGTAAGTTGGA,RELAR:TGGGGTTTCACCCCTACTGA。
SEQUENCE LISTING
<110> 青岛市畜牧兽医研究所
<120> 一种哺乳动物基因组修饰方法
<130> 2010
<160> 20
<170> PatentIn version 3.3
<210> 1
<211> 1728
<212> DNA
<213> 人工序列
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ggatccatgg gcagcagcca tcatcatcat catcatagca gcggcctggt gccgcgcggc 60
agccatatgg gcgcggatat tggcgatctg tttgaacgcg aagaagtgga actggaatat 120
tttagcggca aaaaaattgc ggtggatgcg tttaacaccc tgtatcagtt tattagcatt 180
attcgccagc cggatggcac cccgctgaaa gatagccagg gccgcattac cagccatctg 240
agcggcattc tgtatcgcgt gagcaacatg gtggaagtgg gcattcgccc ggtgtttgtg 300
tttgatggcg aaccgccgga atttaaaaaa gcggaaattg aagaacgcaa aaaacgccgc 360
gcggaagcgg aagaaatgtg gattgcggcg ctgcaggcgg gcgataaaga tgcgaaaaaa 420
tatgcgcagg cggcgggccg cgtggatgaa tatattgtgg atagcgcgaa aaccctgctg 480
gcgtatatgg gcattccgtt tgtggatgcg ccggcggaag gcgaagcgca ggcggcgtat 540
atggcggcga aaggcgatgt ggaatatacc ggcagccagg attatgatag cctgctgttt 600
ggcagcccgc gcctggcgcg caacctggcg attaccggca aacgcaaact gccgggcaaa 660
aacgtgtatg tggatgtgaa accggaaatt attattctgg aaagcaacct gaaacgcctg 720
ggcctgaccc gcgaacagct gattgatatt gcgattctgg tgggcaccga ttataacgaa 780
ggcgtgaaag gcgtgggcgt gaaaaaagcg ctgaactata ttaaaaccta tggcgatatt 840
tttcgcgcgc tgaaagcgct gaaagtgaac attgatcatg tggaagaaat tcgcaacttt 900
tttctgaacc cgccggtgac cgatgattat cgcattgaat ttcgcgaacc ggattttgaa 960
aaagcgattg aatttctgtg cgaagaacat gattttagcc gcgaacgcgt ggaaaaagcg 1020
ctggaaaaac tgaaagcgct gaaaagcacc caggcgaccc tggaacgctg gtttgaattt 1080
ggcggcggcg gcagcggcgg cggcggcagc ggcggcggcg gcagccagct ggtgaaaagc 1140
gaactggaag aaaaaaaaag ctttctgcgc cataaactga aatatgtgcc gcatgaatat 1200
attgaactga ttgaaattgc gcgcaacagc acccaggatc gcattctgga aatgaaagtg 1260
atggaatttt ttatgaaagt gtatggctat cgcggcaaac atctgggcgg cagccgcaaa 1320
ccggatggcg cgatttatac cgtgggcagc ccgattgatt atggcgtgat tgtggatacc 1380
aaagcgtata gcggcggcta taacctgccg attggccagg cggatgaaat gcagcgctat 1440
gtggaagaaa accagacccg caacaaacat attaacccga acgaatggtg gaaagtgtat 1500
ccgagcagcg tgaccgaatt taaatttctg tttgtgagcg gccattttaa aggcaactat 1560
aaagcgcagc tgacccgcct gaaccatatt accaactgca acggcgcggt gctgagcgtg 1620
gaagaactgc tgattggcgg cgaaatgatt aaagcgggca ccctgaccct ggaagaagtg 1680
cgccgcaaat ttaacaacgg cgaaattaac tttaaactgt gagaattc 1728
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gacggatcgg gagatctccc gatcccctat ggtgcactct cagtacaatc tgctctgatg 60
ccgcatagtt aagccagtat ctgctccctg cttgtgtgtt ggaggtcgct gagtagtgcg 120
cgagcaaaat ttaagctaca acaaggcaag gcttgaccga caattgcatg aagaatctgc 180
ttagggttag gcgttttgcg ctgcttcgcg atgtacgggc cagatatacg cgttgacatt 240
gattattgac tagttattaa tagtaatcaa ttacggggtc attagttcat agcccatata 300
tggagttccg cgttacataa cttacggtaa atggcccgcc tggctgaccg cccaacgacc 360
cccgcccatt gacgtcaata atgacgtatg ttcccatagt aacgccaata gggactttcc 420
attgacgtca atgggtggag tatttacggt aaactgccca cttggcagta catcaagtgt 480
atcatatgcc aagtacgccc cctattgacg tcaatgacgg taaatggccc gcctggcatt 540
atgcccagta catgacctta tgggactttc ctacttggca gtacatctac gtattagtca 600
tcgctattac catggtgatg cggttttggc agtacatcaa tgggcgtgga tagcggtttg 660
actcacgggg atttccaagt ctccacccca ttgacgtcaa tgggagtttg ttttggcacc 720
aaaatcaacg ggactttcca aaatgtcgta acaactccgc cccattgacg caaatgggcg 780
gtaggcgtgt acggtgggag gtctatataa gcagagctct ctggctaact agagaaccca 840
ctgcttactg gcttatcgaa attaatacga ctcactatag ggagacccaa gctggctagc 900
gtttaaactt aagcttggta ccgagctcgg atccatgggc agcagccatc atcatcatca 960
tcatagcagc ggcctggtgc cgcgcggcag ccatatgggc gcggatattg gcgatctgtt 1020
tgaacgcgaa gaagtggaac tggaatattt tagcggcaaa aaaattgcgg tggatgcgtt 1080
taacaccctg tatcagttta ttagcattat tcgccagccg gatggcaccc cgctgaaaga 1140
tagccagggc cgcattacca gccatctgag cggcattctg tatcgcgtga gcaacatggt 1200
ggaagtgggc attcgcccgg tgtttgtgtt tgatggcgaa ccgccggaat ttaaaaaagc 1260
ggaaattgaa gaacgcaaaa aacgccgcgc ggaagcggaa gaaatgtgga ttgcggcgct 1320
gcaggcgggc gataaagatg cgaaaaaata tgcgcaggcg gcgggccgcg tggatgaata 1380
tattgtggat agcgcgaaaa ccctgctggc gtatatgggc attccgtttg tggatgcgcc 1440
ggcggaaggc gaagcgcagg cggcgtatat ggcggcgaaa ggcgatgtgg aatataccgg 1500
cagccaggat tatgatagcc tgctgtttgg cagcccgcgc ctggcgcgca acctggcgat 1560
taccggcaaa cgcaaactgc cgggcaaaaa cgtgtatgtg gatgtgaaac cggaaattat 1620
tattctggaa agcaacctga aacgcctggg cctgacccgc gaacagctga ttgatattgc 1680
gattctggtg ggcaccgatt ataacgaagg cgtgaaaggc gtgggcgtga aaaaagcgct 1740
gaactatatt aaaacctatg gcgatatttt tcgcgcgctg aaagcgctga aagtgaacat 1800
tgatcatgtg gaagaaattc gcaacttttt tctgaacccg ccggtgaccg atgattatcg 1860
cattgaattt cgcgaaccgg attttgaaaa agcgattgaa tttctgtgcg aagaacatga 1920
ttttagccgc gaacgcgtgg aaaaagcgct ggaaaaactg aaagcgctga aaagcaccca 1980
ggcgaccctg gaacgctggt ttgaatttgg cggcggcggc agcggcggcg gcggcagcgg 2040
cggcggcggc agccagctgg tgaaaagcga actggaagaa aaaaaaagct ttctgcgcca 2100
taaactgaaa tatgtgccgc atgaatatat tgaactgatt gaaattgcgc gcaacagcac 2160
ccaggatcgc attctggaaa tgaaagtgat ggaatttttt atgaaagtgt atggctatcg 2220
cggcaaacat ctgggcggca gccgcaaacc ggatggcgcg atttataccg tgggcagccc 2280
gattgattat ggcgtgattg tggataccaa agcgtatagc ggcggctata acctgccgat 2340
tggccaggcg gatgaaatgc agcgctatgt ggaagaaaac cagacccgca acaaacatat 2400
taacccgaac gaatggtgga aagtgtatcc gagcagcgtg accgaattta aatttctgtt 2460
tgtgagcggc cattttaaag gcaactataa agcgcagctg acccgcctga accatattac 2520
caactgcaac ggcgcggtgc tgagcgtgga agaactgctg attggcggcg aaatgattaa 2580
agcgggcacc ctgaccctgg aagaagtgcg ccgcaaattt aacaacggcg aaattaactt 2640
taaactgtga gaattctgca gatatccagc acagtggcgg ccgctcgagt ctagagggcc 2700
cgtttaaacc cgctgatcag cctcgactgt gccttctagt tgccagccat ctgttgtttg 2760
cccctccccc gtgccttcct tgaccctgga aggtgccact cccactgtcc tttcctaata 2820
aaatgaggaa attgcatcgc attgtctgag taggtgtcat tctattctgg ggggtggggt 2880
ggggcaggac agcaaggggg aggattggga agacaatagc aggcatgctg gggatgcggt 2940
gggctctatg gcttctgagg cggaaagaac cagctggggc tctagggggt atccccacgc 3000
gccctgtagc ggcgcattaa gcgcggcggg tgtggtggtt acgcgcagcg tgaccgctac 3060
acttgccagc gccctagcgc ccgctccttt cgctttcttc ccttcctttc tcgccacgtt 3120
cgccggcttt ccccgtcaag ctctaaatcg ggggctccct ttagggttcc gatttagtgc 3180
tttacggcac ctcgacccca aaaaacttga ttagggtgat ggttcacgta gtgggccatc 3240
gccctgatag acggtttttc gccctttgac gttggagtcc acgttcttta atagtggact 3300
cttgttccaa actggaacaa cactcaaccc tatctcggtc tattcttttg atttataagg 3360
gattttgccg atttcggcct attggttaaa aaatgagctg atttaacaaa aatttaacgc 3420
gaattaattc tgtggaatgt gtgtcagtta gggtgtggaa agtccccagg ctccccagca 3480
ggcagaagta tgcaaagcat gcatctcaat tagtcagcaa ccaggtgtgg aaagtcccca 3540
ggctccccag caggcagaag tatgcaaagc atgcatctca attagtcagc aaccatagtc 3600
ccgcccctaa ctccgcccat cccgccccta actccgccca gttccgccca ttctccgccc 3660
catggctgac taattttttt tatttatgca gaggccgagg ccgcctctgc ctctgagcta 3720
ttccagaagt agtgaggagg cttttttgga ggcctaggct tttgcaaaaa gctcccggga 3780
gcttgtatat ccattttcgg atctgatcaa gagacaggat gaggatcgtt tcgcatgatt 3840
gaacaagatg gattgcacgc aggttctccg gccgcttggg tggagaggct attcggctat 3900
gactgggcac aacagacaat cggctgctct gatgccgccg tgttccggct gtcagcgcag 3960
gggcgcccgg ttctttttgt caagaccgac ctgtccggtg ccctgaatga actgcaggac 4020
gaggcagcgc ggctatcgtg gctggccacg acgggcgttc cttgcgcagc tgtgctcgac 4080
gttgtcactg aagcgggaag ggactggctg ctattgggcg aagtgccggg gcaggatctc 4140
ctgtcatctc accttgctcc tgccgagaaa gtatccatca tggctgatgc aatgcggcgg 4200
ctgcatacgc ttgatccggc tacctgccca ttcgaccacc aagcgaaaca tcgcatcgag 4260
cgagcacgta ctcggatgga agccggtctt gtcgatcagg atgatctgga cgaagagcat 4320
caggggctcg cgccagccga actgttcgcc aggctcaagg cgcgcatgcc cgacggcgag 4380
gatctcgtcg tgacccatgg cgatgcctgc ttgccgaata tcatggtgga aaatggccgc 4440
ttttctggat tcatcgactg tggccggctg ggtgtggcgg accgctatca ggacatagcg 4500
ttggctaccc gtgatattgc tgaagagctt ggcggcgaat gggctgaccg cttcctcgtg 4560
ctttacggta tcgccgctcc cgattcgcag cgcatcgcct tctatcgcct tcttgacgag 4620
ttcttctgag cgggactctg gggttcgaaa tgaccgacca agcgacgccc aacctgccat 4680
cacgagattt cgattccacc gccgccttct atgaaaggtt gggcttcgga atcgttttcc 4740
gggacgccgg ctggatgatc ctccagcgcg gggatctcat gctggagttc ttcgcccacc 4800
ccaacttgtt tattgcagct tataatggtt acaaataaag caatagcatc acaaatttca 4860
caaataaagc atttttttca ctgcattcta gttgtggttt gtccaaactc atcaatgtat 4920
cttatcatgt ctgtataccg tcgacctcta gctagagctt ggcgtaatca tggtcatagc 4980
tgtttcctgt gtgaaattgt tatccgctca caattccaca caacatacga gccggaagca 5040
taaagtgtaa agcctggggt gcctaatgag tgagctaact cacattaatt gcgttgcgct 5100
cactgcccgc tttccagtcg ggaaacctgt cgtgccagct gcattaatga atcggccaac 5160
gcgcggggag aggcggtttg cgtattgggc gctcttccgc ttcctcgctc actgactcgc 5220
tgcgctcggt cgttcggctg cggcgagcgg tatcagctca ctcaaaggcg gtaatacggt 5280
tatccacaga atcaggggat aacgcaggaa agaacatgtg agcaaaaggc cagcaaaagg 5340
ccaggaaccg taaaaaggcc gcgttgctgg cgtttttcca taggctccgc ccccctgacg 5400
agcatcacaa aaatcgacgc tcaagtcaga ggtggcgaaa cccgacagga ctataaagat 5460
accaggcgtt tccccctgga agctccctcg tgcgctctcc tgttccgacc ctgccgctta 5520
ccggatacct gtccgccttt ctcccttcgg gaagcgtggc gctttctcat agctcacgct 5580
gtaggtatct cagttcggtg taggtcgttc gctccaagct gggctgtgtg cacgaacccc 5640
ccgttcagcc cgaccgctgc gccttatccg gtaactatcg tcttgagtcc aacccggtaa 5700
gacacgactt atcgccactg gcagcagcca ctggtaacag gattagcaga gcgaggtatg 5760
taggcggtgc tacagagttc ttgaagtggt ggcctaacta cggctacact agaagaacag 5820
tatttggtat ctgcgctctg ctgaagccag ttaccttcgg aaaaagagtt ggtagctctt 5880
gatccggcaa acaaaccacc gctggtagcg gtttttttgt ttgcaagcag cagattacgc 5940
gcagaaaaaa aggatctcaa gaagatcctt tgatcttttc tacggggtct gacgctcagt 6000
ggaacgaaaa ctcacgttaa gggattttgg tcatgagatt atcaaaaagg atcttcacct 6060
agatcctttt aaattaaaaa tgaagtttta aatcaatcta aagtatatat gagtaaactt 6120
ggtctgacag ttaccaatgc ttaatcagtg aggcacctat ctcagcgatc tgtctatttc 6180
gttcatccat agttgcctga ctccccgtcg tgtagataac tacgatacgg gagggcttac 6240
catctggccc cagtgctgca atgataccgc gagacccacg ctcaccggct ccagatttat 6300
cagcaataaa ccagccagcc ggaagggccg agcgcagaag tggtcctgca actttatccg 6360
cctccatcca gtctattaat tgttgccggg aagctagagt aagtagttcg ccagttaata 6420
gtttgcgcaa cgttgttgcc attgctacag gcatcgtggt gtcacgctcg tcgtttggta 6480
tggcttcatt cagctccggt tcccaacgat caaggcgagt tacatgatcc cccatgttgt 6540
gcaaaaaagc ggttagctcc ttcggtcctc cgatcgttgt cagaagtaag ttggccgcag 6600
tgttatcact catggttatg gcagcactgc ataattctct tactgtcatg ccatccgtaa 6660
gatgcttttc tgtgactggt gagtactcaa ccaagtcatt ctgagaatag tgtatgcggc 6720
gaccgagttg ctcttgcccg gcgtcaatac gggataatac cgcgccacat agcagaactt 6780
taaaagtgct catcattgga aaacgttctt cggggcgaaa actctcaagg atcttaccgc 6840
tgttgagatc cagttcgatg taacccactc gtgcacccaa ctgatcttca gcatctttta 6900
ctttcaccag cgtttctggg tgagcaaaaa caggaaggca aaatgccgca aaaaagggaa 6960
taagggcgac acggaaatgt tgaatactca tactcttcct ttttcaatat tattgaagca 7020
tttatcaggg ttattgtctc atgagcggat acatatttga atgtatttag aaaaataaac 7080
aaataggggt tccgcgcaca tttccccgaa aagtgccacc tgacgtc 7127
<210> 3
<211> 20
<212> DNA
<213> 人工序列
<400> 3
ctagagaacc cactgcttac 20
<210> 4
<211> 18
<212> DNA
<213> 人工序列
<400> 4
tagaaggcac agtcgagg 18
<210> 5
<211> 336
<212> DNA
<213> 人工序列
<400> 5
aagctgattg ggtgtggtcg ccgtggccgg acgccgctcg ggggacgtgg gaggggaggc 60
gggaaacagc ttagtgggtg tggggtcgcg cattttcttc aaccaggagg tgaggaggtt 120
tcgacatggc ggtgcagccg aaggagacgc tgcagttgga gagcgcggcc gaggtcggct 180
tcgtgcgctt ctttcagggc atgccggaga agccgaccac cacagtgcgc cttttcgacc 240
ggggcgactt ctatacggcg cacggcgagg acgcgctgct ggccgcccgg gaggtgttca 300
agacccaggg ggtgatcaag tacatggggc cggcag 336
<210> 6
<211> 24
<212> DNA
<213> 人工序列
<400> 6
ggtggagccg aaggagacgc tgcc 24
<210> 7
<211> 21
<212> DNA
<213> 人工序列
<400> 7
agccgacctc ggccgcgctc g 21
<210> 8
<211> 17
<212> DNA
<213> 人工序列
<400> 8
ttgggtgtgg tcgccgt 17
<210> 9
<211> 20
<212> DNA
<213> 人工序列
<400> 9
ccgtgcgccg tatagaagtc 20
<210> 10
<211> 310
<212> DNA
<213> 人工序列
<400> 10
agagccgagc cgagccgagc cgagcggagc cgagccgagc cgagcggagc cgagccgagc 60
cgagccgagc cgaaccgagc cgagccgagc cgaaccgagc cgagccgagc cgagtggaat 120
cgagtcgagt cgagcctcca gcgtccggcg cgcaggcctt ccgccgcgtt gatctttcgg 180
ttgctggtgg ccgtgggccg cgcggtctac ggtcgggctg aaagacgcgc gctgcaatgg 240
cgacctttgt gagcgagctg gaggcagcca agaagaactt gagcgaggcg ctgggggaca 300
acgtgaaaca 310
<210> 11
<211> 24
<212> DNA
<213> 人工序列
<400> 11
ggtcgggctg aaagacgccc gcta 24
<210> 12
<211> 26
<212> DNA
<213> 人工序列
<400> 12
ggctgcctcc agctcgctca caaagt 26
<210> 13
<211> 20
<212> DNA
<213> 人工序列
<400> 13
cgcgttgatc tttcggttgc 20
<210> 14
<211> 20
<212> DNA
<213> 人工序列
<400> 14
gcggctctta ctgtttcacg 20
<210> 15
<211> 151
<212> DNA
<213> 人工序列
<400> 15
gccggccccg gcctcgggcc cctatgtgga gatcatcgag cagcccaagc agcggggcat 60
gcgcttccgc tacaagtgcg agggccgctc agccggcagt atcccgggcg agaggagcac 120
ggataccacc aagacccacc ccaccatcaa g 151
<210> 16
<211> 23
<212> DNA
<213> 人工序列
<400> 16
gggcatgcgc ttccgctaca agc 23
<210> 17
<211> 22
<212> DNA
<213> 人工序列
<400> 17
gatactgccg gctgagcggc ct 22
<210> 18
<211> 20
<212> DNA
<213> 人工序列
<400> 18
ttcccctcgg gtaagttgga 20
<210> 19
<211> 20
<212> DNA
<213> 人工序列
<400> 19
tggggtttca cccctactga 20
<210> 20
<211> 571
<212> PRT
<213> 人工序列
<400> 20
Met Gly Ser Ser His His His His His His Ser Ser Gly Leu Val Pro
1 5 10 15
Arg Gly Ser His Met Gly Ala Asp Ile Gly Asp Leu Phe Glu Arg Glu
20 25 30
Glu Val Glu Leu Glu Tyr Phe Ser Gly Lys Lys Ile Ala Val Asp Ala
35 40 45
Phe Asn Thr Leu Tyr Gln Phe Ile Ser Ile Ile Arg Gln Pro Asp Gly
50 55 60
Thr Pro Leu Lys Asp Ser Gln Gly Arg Ile Thr Ser His Leu Ser Gly
65 70 75 80
Ile Leu Tyr Arg Val Ser Asn Met Val Glu Val Gly Ile Arg Pro Val
85 90 95
Phe Val Phe Asp Gly Glu Pro Pro Glu Phe Lys Lys Ala Glu Ile Glu
100 105 110
Glu Arg Lys Lys Arg Arg Ala Glu Ala Glu Glu Met Trp Ile Ala Ala
115 120 125
Leu Gln Ala Gly Asp Lys Asp Ala Lys Lys Tyr Ala Gln Ala Ala Gly
130 135 140
Arg Val Asp Glu Tyr Ile Val Asp Ser Ala Lys Thr Leu Leu Ala Tyr
145 150 155 160
Met Gly Ile Pro Phe Val Asp Ala Pro Ala Glu Gly Glu Ala Gln Ala
165 170 175
Ala Tyr Met Ala Ala Lys Gly Asp Val Glu Tyr Thr Gly Ser Gln Asp
180 185 190
Tyr Asp Ser Leu Leu Phe Gly Ser Pro Arg Leu Ala Arg Asn Leu Ala
195 200 205
Ile Thr Gly Lys Arg Lys Leu Pro Gly Lys Asn Val Tyr Val Asp Val
210 215 220
Lys Pro Glu Ile Ile Ile Leu Glu Ser Asn Leu Lys Arg Leu Gly Leu
225 230 235 240
Thr Arg Glu Gln Leu Ile Asp Ile Ala Ile Leu Val Gly Thr Asp Tyr
245 250 255
Asn Glu Gly Val Lys Gly Val Gly Val Lys Lys Ala Leu Asn Tyr Ile
260 265 270
Lys Thr Tyr Gly Asp Ile Phe Arg Ala Leu Lys Ala Leu Lys Val Asn
275 280 285
Ile Asp His Val Glu Glu Ile Arg Asn Phe Phe Leu Asn Pro Pro Val
290 295 300
Thr Asp Asp Tyr Arg Ile Glu Phe Arg Glu Pro Asp Phe Glu Lys Ala
305 310 315 320
Ile Glu Phe Leu Cys Glu Glu His Asp Phe Ser Arg Glu Arg Val Glu
325 330 335
Lys Ala Leu Glu Lys Leu Lys Ala Leu Lys Ser Thr Gln Ala Thr Leu
340 345 350
Glu Arg Trp Phe Glu Phe Gly Gly Gly Gly Ser Gly Gly Gly Gly Ser
355 360 365
Gly Gly Gly Gly Ser Gln Leu Val Lys Ser Glu Leu Glu Glu Lys Lys
370 375 380
Ser Phe Leu Arg His Lys Leu Lys Tyr Val Pro His Glu Tyr Ile Glu
385 390 395 400
Leu Ile Glu Ile Ala Arg Asn Ser Thr Gln Asp Arg Ile Leu Glu Met
405 410 415
Lys Val Met Glu Phe Phe Met Lys Val Tyr Gly Tyr Arg Gly Lys His
420 425 430
Leu Gly Gly Ser Arg Lys Pro Asp Gly Ala Ile Tyr Thr Val Gly Ser
435 440 445
Pro Ile Asp Tyr Gly Val Ile Val Asp Thr Lys Ala Tyr Ser Gly Gly
450 455 460
Tyr Asn Leu Pro Ile Gly Gln Ala Asp Glu Met Gln Arg Tyr Val Glu
465 470 475 480
Glu Asn Gln Thr Arg Asn Lys His Ile Asn Pro Asn Glu Trp Trp Lys
485 490 495
Val Tyr Pro Ser Ser Val Thr Glu Phe Lys Phe Leu Phe Val Ser Gly
500 505 510
His Phe Lys Gly Asn Tyr Lys Ala Gln Leu Thr Arg Leu Asn His Ile
515 520 525
Thr Asn Cys Asn Gly Ala Val Leu Ser Val Glu Glu Leu Leu Ile Gly
530 535 540
Gly Glu Met Ile Lys Ala Gly Thr Leu Thr Leu Glu Glu Val Arg Arg
545 550 555 560
Lys Phe Asn Asn Gly Glu Ile Asn Phe Lys Leu
565 570
Claims (3)
1.一种哺乳动物基因组修饰方法,其特征在于包括如下步骤:
1)根据研究目的选定猪血管内皮细胞系基因组上与研究目的对应的靶基因DNA序列;
2)设计识别靶基因DNA序列的一对单链DNA寡核苷酸,这一对单链DNA寡核苷酸除3'末端的一个碱基外分别与靶基因DNA不同区段的正义链和反义链互补;
所述一对单链DNA寡核苷酸的具体序列如下:
RELATF:GGGCATGCGCTTCCGCTACAAGC;
RELATR:GATACTGCCGGCTGAGCGGCCT;
3)步骤2)中所述的一对单链DNA寡核苷酸与质粒载体pcDNA-DN按照质量比1:1:10共转染猪细胞系PIEC,所述pcDNA-DN序列如SEQ ID NO.2所示。
2.如权利要求1所述的哺乳动物基因组修饰方法,其特征在于步骤3)中的质粒载体pcDNA-DN是通过如下步骤构建的:
a合成DNA片段DN,其序列如SEQ ID NO.1所示;
b DNA片段DN通过BamHⅠ与EcoRⅠ双酶切克隆到pcDNA3.1(+)载体的相应多克隆位点,通过测序验证,获得质粒载体pcDNA-DN。
3.如权利要求2所述的哺乳动物基因组修饰方法,其特征在于设计正向测序引物及反向测序引物对质粒载体pcDNA-DN的序列进行验证,所述正向测序引物pcDNA3.1-F的序列如SEQ IDNO.3所示,反向测序引物pcDNA3.1-R的序列如SEQ ID NO.4所示。
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