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T5 exonuclease-dependent assembly offers a low-cost method for efficient cloning and site-directed mutagenesis

Nucleic acids research, 2019-02, Vol.47 (3), p.e15-e15 [Peer Reviewed Journal]

The Author(s) 2018. Published by Oxford University Press on behalf of Nucleic Acids Research. 2019 ;The Author(s) 2018. Published by Oxford University Press on behalf of Nucleic Acids Research. ;ISSN: 0305-1048 ;EISSN: 1362-4962 ;DOI: 10.1093/nar/gky1169 ;PMID: 30462336

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  • Title:
    T5 exonuclease-dependent assembly offers a low-cost method for efficient cloning and site-directed mutagenesis
  • Author: Xia, Yongzhen ; Li, Kai ; Li, Jingjing ; Wang, Tianqi ; Gu, Lichuan ; Xun, Luying
  • Subjects: Cloning, Molecular - methods ; Escherichia coli - genetics ; Exodeoxyribonucleases ; Genetic Vectors ; Methods Online ; Mutagenesis, Site-Directed - methods ; Polyethylene Glycols ; Tromethamine
  • Is Part Of: Nucleic acids research, 2019-02, Vol.47 (3), p.e15-e15
  • Description: Abstract The assembly of DNA fragments with homologous arms is becoming popular in routine cloning. For an in vitro assembly reaction, a DNA polymerase is often used either alone for its 3′-5′ exonuclease activity or together with a 5′-3′ exonuclease for its DNA polymerase activity. Here, we present a ‘T5 exonuclease DNA assembly’ (TEDA) method that only uses a 5′-3′ exonuclease. DNA fragments with short homologous ends were treated by T5 exonuclease and then transformed into Escherichia coli to produce clone colonies. The cloning efficiency was similar to that of the commercial In-Fusion method employing a proprietary DNA polymerase, but higher than that of the Gibson method utilizing T5 exonuclease, Phusion DNA polymerase, and DNA ligase. It also assembled multiple DNA fragments and did simultaneous site-directed mutagenesis at multiple sites. The reaction mixture was simple, and each reaction used 0.04 U of T5 exonuclease that cost 0.25 US cents. The simplicity, cost effectiveness, and cloning efficiency should promote its routine use, especially for labs with a budget constraint. TEDA may trigger further development of DNA assembly methods that employ single exonucleases.
  • Publisher: England: Oxford University Press
  • Language: English
  • Identifier: ISSN: 0305-1048
    EISSN: 1362-4962
    DOI: 10.1093/nar/gky1169
    PMID: 30462336
  • Source: Open Access: DOAJ Directory of Open Access Journals
    Open Access: PubMed Central
    Oxford Journals Open Access Collection
    Geneva Foundation Free Medical Journals at publisher websites
    MEDLINE
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