ArticleNucleic acids research2019
T5 exonuclease-dependent assembly offers a low-cost method for efficient cloning and site-directed mutagenesis.
Article in Nucleic acids research, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 160 papers.
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160 citing papers in PubMed, 338 citations in OpenAlex.
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100 more citing papers are in PubMed but not listed here.
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Authors and funding
6 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
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.
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