PNAS:一种新型纳米孔测序技术获突破

2016-04-24 MedSci MedSci原创

经济高效的单分子测序平台能为人们提供很大的帮助,比如破解完整基因组序列、确定单倍型和鉴定mRNA可变剪接。为此,哥伦比亚大学的车靖岳(Jingyue Ju)和哈佛大学的George Church教授合作开发了基于纳米孔的单分子边合成边测序(SBS)系统。他们给四种核苷酸分别标记上不同的聚合物。聚合酶会将标记的核苷酸添加到延伸中的DNA链上,同时释放出聚合物标签。这些标签随后通过纳米孔,引起纳米孔电

经济高效的单分子测序平台能为人们提供很大的帮助,比如破解完整基因组序列、确定单倍型和鉴定mRNA可变剪接。为此,哥伦比亚大学的车靖岳(Jingyue Ju)和哈佛大学的George Church教授合作开发了基于纳米孔的单分子边合成边测序(SBS)系统。

他们给四种核苷酸分别标记上不同的聚合物。聚合酶会将标记的核苷酸添加到延伸中的DNA链上,同时释放出聚合物标签。这些标签随后通过纳米孔,引起纳米孔电流的改变。检测这些标签造成的电信号差异,就可以准确分辨相应的碱基。

Jingyue Ju的George Church的研究团队最近对这一测序技术进行升级,打造了高通量的单分子纳米孔测序平台。这一重要成果发表在美国国家科学院院刊PNAS杂志上。Jingyue Ju是基因测序领域的专家,曾发明四色可逆终止子测序技术。George Church被誉为是个人基因组学和合成生物学的先锋。1984年Church等人发表了首个直接基因组测序方法,该文章中的一些策略现在仍应用在二代测序技术中。此外,如今的多重化分子技术和条码式标签也是他发明的,Church还是纳米孔测序技术的发明者之一。

研究人员将聚合酶拴系在α-hemolysin纳米孔上,在芯片上排出纳米孔阵列。随后他们用多重化的纳米孔传感器搭建了高通量的测序平台。这个平台使用多聚物标记的核苷酸,可以在单分子水平上对多个DNA模板进行平行测序。研究人员通过这种方式获得了实时的单分子测序数据,分辨率达到了单碱基水平。

纵观测序技术的发展历程,没有哪一个技术像纳米孔测序那样慢热,但也没有哪一个技术像纳米孔测序这么接近普罗大众。将单链DNA拉过蛋白孔,检测碱基穿过时电导的微小改变,纳米孔测序的这一基础理念已经有十几年历史了。从第一篇论文到纳米孔测序的成形,这条道路并不是一帆风顺的。研究者们产生了很多分歧,也遇到了大量的技术死胡同。

原始出处:


Fuller CW, Kumar S, Porel M, Chien M, Bibillo A, Stranges PB, Dorwart M, Tao C, Li Z, Guo W, Shi S, Korenblum D, Trans A, Aguirre A, Liu E, Harada ET, Pollard J, Bhat A, Cech C, Yang A, Arnold C, Palla M, Hovis J, Chen R, Morozova I, Kalachikov S, Russo JJ, Kasianowicz JJ, Davis R, Roever S, Church GM, Ju J. Real-time single-molecule electronic DNA sequencing by synthesis using polymer-tagged nucleotides on a nanopore array. Proc Natl Acad Sci U S A. 2016 Apr 18. pii: 201601782

George Church成果:

Polony Sequencing
2005年哈佛George Church实验室发展起来的,基于乳化PCR(emulsion PCR)和自动显微镜等技术的测序方法。相关技术已整合进ABI公司的SOLiD测序技术平台。
单分子互作测序(SMI-seq)技术
该技术能够实现单分子水平上的并行分析,获得大量蛋白质的互作图谱。这一成果发表在近期的Nature杂志上,文章的通讯作者是哈佛医学院的George M. Church和Liangcai Gu。

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    2017-01-07 drwjr
  2. [GetPortalCommentsPageByObjectIdResponse(id=1855825, encodeId=de5718558255e, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=22, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Sat Jan 07 01:48:00 CST 2017, time=2017-01-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1978284, encodeId=ee2119e8284b3, content=<a href='/topic/show?id=fcbbe73746f' target=_blank style='color:#2F92EE;'>#纳米孔#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=77374, encryptionId=fcbbe73746f, topicName=纳米孔)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0ad8182, createdName=axin009, createdTime=Mon Jul 25 11:48:00 CST 2016, time=2016-07-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=82842, encodeId=bb7f82842f4, content=又是一突破, beContent=null, objectType=article, channel=null, level=null, likeNumber=71, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0d231626576, createdName=jjzouyan, createdTime=Tue Apr 26 14:48:00 CST 2016, time=2016-04-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=82778, encodeId=f95c82e788d, content=不错,学习中,赞一个, beContent=null, objectType=article, channel=null, level=null, likeNumber=128, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=841a1636000, createdName=lietome1, createdTime=Tue Apr 26 08:02:00 CST 2016, time=2016-04-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=82632, encodeId=f4e88263259, content=纳米技术在未来很有前途。, beContent=null, objectType=article, channel=null, level=null, likeNumber=126, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20161002/IMG57F0B284885903774.jpg, createdBy=747b1625266, createdName=9966699555, createdTime=Mon Apr 25 01:52:00 CST 2016, time=2016-04-25, status=1, ipAttribution=)]
    2016-07-25 axin009
  3. [GetPortalCommentsPageByObjectIdResponse(id=1855825, encodeId=de5718558255e, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=22, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Sat Jan 07 01:48:00 CST 2017, time=2017-01-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1978284, encodeId=ee2119e8284b3, content=<a href='/topic/show?id=fcbbe73746f' target=_blank style='color:#2F92EE;'>#纳米孔#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=77374, encryptionId=fcbbe73746f, topicName=纳米孔)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0ad8182, createdName=axin009, createdTime=Mon Jul 25 11:48:00 CST 2016, time=2016-07-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=82842, encodeId=bb7f82842f4, content=又是一突破, beContent=null, objectType=article, channel=null, level=null, likeNumber=71, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0d231626576, createdName=jjzouyan, createdTime=Tue Apr 26 14:48:00 CST 2016, time=2016-04-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=82778, encodeId=f95c82e788d, content=不错,学习中,赞一个, beContent=null, objectType=article, channel=null, level=null, likeNumber=128, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=841a1636000, createdName=lietome1, createdTime=Tue Apr 26 08:02:00 CST 2016, time=2016-04-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=82632, encodeId=f4e88263259, content=纳米技术在未来很有前途。, beContent=null, objectType=article, channel=null, level=null, likeNumber=126, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20161002/IMG57F0B284885903774.jpg, createdBy=747b1625266, createdName=9966699555, createdTime=Mon Apr 25 01:52:00 CST 2016, time=2016-04-25, status=1, ipAttribution=)]
    2016-04-26 jjzouyan

    又是一突破

    0

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    2016-04-26 lietome1

    不错,学习中,赞一个

    0

  5. [GetPortalCommentsPageByObjectIdResponse(id=1855825, encodeId=de5718558255e, content=<a href='/topic/show?id=f32014428fc' target=_blank style='color:#2F92EE;'>#PNAS#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=22, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=14428, encryptionId=f32014428fc, topicName=PNAS)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=08e964, createdName=drwjr, createdTime=Sat Jan 07 01:48:00 CST 2017, time=2017-01-07, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1978284, encodeId=ee2119e8284b3, content=<a href='/topic/show?id=fcbbe73746f' target=_blank style='color:#2F92EE;'>#纳米孔#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=33, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=77374, encryptionId=fcbbe73746f, topicName=纳米孔)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0ad8182, createdName=axin009, createdTime=Mon Jul 25 11:48:00 CST 2016, time=2016-07-25, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=82842, encodeId=bb7f82842f4, content=又是一突破, beContent=null, objectType=article, channel=null, level=null, likeNumber=71, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=0d231626576, createdName=jjzouyan, createdTime=Tue Apr 26 14:48:00 CST 2016, time=2016-04-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=82778, encodeId=f95c82e788d, content=不错,学习中,赞一个, beContent=null, objectType=article, channel=null, level=null, likeNumber=128, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=841a1636000, createdName=lietome1, createdTime=Tue Apr 26 08:02:00 CST 2016, time=2016-04-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=82632, encodeId=f4e88263259, content=纳米技术在未来很有前途。, beContent=null, objectType=article, channel=null, level=null, likeNumber=126, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=http://cacheapi.medsci.cn/resource/upload/20161002/IMG57F0B284885903774.jpg, createdBy=747b1625266, createdName=9966699555, createdTime=Mon Apr 25 01:52:00 CST 2016, time=2016-04-25, status=1, ipAttribution=)]
    2016-04-25 9966699555

    纳米技术在未来很有前途。

    0

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