Toward a generalized and high-throughput enzyme screening system based on artificial genetic circuits = 인공 유전자회로를 이용한 초고속 효소탐색시스템 개발

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Title
Toward a generalized and high-throughput enzyme screening system based on artificial genetic circuits = 인공 유전자회로를 이용한 초고속 효소탐색시스템 개발
Author(s)
Su-Lim Choi; Eugene Rha; Sang Jun Lee; Haseong KimKil Koang Kwon; Y S Jeong; Y H Rhee; Jae Jun Song; H S Kim; Seung Goo Lee
Bibliographic Citation
ACS Synthetic Biology, vol. 3, no. 3, pp. 163-171
Publication Year
2014
Abstract
Large-scale screening of enzyme libraries is essential for the development of cost-effective biological processes, which will be indispensable for the production of sustainable biobased chemicals. Here, we introduce a genetic circuit termed the Genetic Enzyme Screening System that is highly useful for high-throughput enzyme screening from diverse microbial metagenomes. The circuit consists of two AND logics. The first AND logic, the two inputs of which are the target enzyme and its substrate, is responsible for the accumulation of a phenol compound in cell. Then, the phenol compound and its inducible transcription factor, whose activation turns on the expression of a reporter gene, interact in the other logic gate. We confirmed that an individual cell harboring this genetic circuit can present approximately a 100-fold higher cellular fluorescence than the negative control and can be easily quantified by flow cytometry depending on the amounts of phenolic derivatives. The high sensitivity of the genetic circuit enables the rapid discovery of novel enzymes from metagenomic libraries, even for genes that show marginal activities in a host system. The crucial feature of this approach is that this single system can be used to screen a variety of enzymes that produce a phenol compound from respective synthetic phenyl-substrates, including cellulase, lipase, alkaline phosphatase, tyrosine phenol-lyase, and methyl parathion hydrolase. Consequently, the highly sensitive and quantitative nature of this genetic circuit along with flow cytometry techniques could provide a widely applicable toolkit for discovering and engineering novel enzymes at a single cell level.
Keyword
DmpRenzyme screeninggenetic circuithigh-throughput screeningmetagenomephenolic compounds
ISSN
2161-5063
Publisher
Amer Chem Soc
DOI
http://dx.doi.org/10.1021/sb400112u
Type
Article
Appears in Collections:
Synthetic Biology and Bioengineering Research Institute > Synthetic Biology Research Center > 1. Journal Articles
Division of Bio Technology Innovation > SME Support Center > 1. Journal Articles
Synthetic Biology and Bioengineering Research Institute > 1. Journal Articles
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