An Engineered B. subtilis Inducible Promoter System with over 10 000-Fold Dynamic Range.
An Engineered B. subtilis Inducible Promoter System with over 10 000-Fold Dynamic Range.
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具有超过10000倍动态范围的工程枯草芽孢杆菌诱导启动子系统。
DOI:
10.1021/acssynbio.8b00469
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发表时间:
2019-07-19
影响因子:
4.7
通讯作者:
Tabor, Jeffrey J.
中科院分区:
文献类型:
--
作者:
Castillo-Hair, Sebastian M.;Fujita, Masaya;Igoshin, Oleg A.;Tabor, Jeffrey J.
Bacillus subtilis is the leading model Gram-positive bacterium, and a widely used chassis for industrial protein production. However, B. subtilis research is limited by a lack of inducible promoter systems with low leakiness and high dynamic range. Here, we engineer an inducible promoter system based on the T7 RNA Polymerase, the lactose repressor LacI, and a chimeric T7lac promoter PT7lac, integrated as a single copy in the B. subtilis genome. In the absence of IPTG, LacI strongly represses T7RNAP and PT7lac and minimizes leakiness. Addition of IPTG de-represses PT7lac and simultaneously induces expression of T7RNAP, resulting in very high output expression. Using green fluorescent and β-galactosidase reporter proteins, we estimate that LacI-T7 can regulate expression with a dynamic range of over 10,000, by far the largest reported for an inducible B. subtilis promoter system. Furthermore, LacI-T7 responds to similar IPTG concentrations and with similar kinetics as the widely used Phy-spank IPTG-inducible system, which we show has a dynamic range of at most 300 in a similar genetic context. Due to its superior performance, our LacI-T7 system should have broad applications in fundamental B. subtilis biology studies and biotechnological applications.
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影响因子:
14.9
作者:
Guiziou S;Sauveplane V;Chang HJ;Clerté C;Declerck N;Jules M;Bonnet J
通讯作者:
Bonnet J
影响因子:
3.2
作者:
Eswaramoorthy, Prahathees;Guo, Tao;Fujita, Masaya
通讯作者:
Fujita, Masaya
影响因子:
2.1
作者:
Fujita, M
通讯作者:
Fujita, M
影响因子:
3.2
作者:
Britton, RA;Eichenberger, P;Grossman, AD
通讯作者:
Grossman, AD
影响因子:
46.9
作者:
Pédelacq, JD;Cabantous, S;Waldo, GS
通讯作者:
Waldo, GS