A Streptomyces venezuelae Cell-Free Toolkit for Synthetic Biology.

A Streptomyces venezuelae Cell-Free Toolkit for Synthetic Biology.
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DOI:
10.1021/acssynbio.0c00581
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发表时间:
2021-02-19
影响因子:
4.7
通讯作者:
Freemont PS
Freemont PS
中科院分区:
生物学2区
文献类型:
--
作者:
Moore SJ;Lai HE;Chee SM;Toh M;Coode S;Chengan K;Capel P;Corre C;de Los Santos EL;Freemont PS

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Prokaryotic cell-free coupled transcription–translation (TX-TL) systems are emerging as a powerful tool to examine natural product biosynthetic pathways in a test tube. The key advantages of this approach are the reduced experimental time scales and controlled reaction conditions. To realize this potential, it is essential to develop specialized cell-free systems in organisms enriched for biosynthetic gene clusters. This requires strong protein production and well-characterized synthetic biology tools. The Streptomyces genus is a major source of natural products. To study enzymes and pathways from Streptomyces, we originally developed a homologous Streptomyces cell-free system to provide a native protein folding environment, a high G+C (%) tRNA pool, and an active background metabolism. However, our initial yields were low (36 μg/mL) and showed a high level of batch-to-batch variation. Here, we present an updated high-yield and robust Streptomyces TX-TL protocol, reaching up to yields of 266 μg/mL of expressed recombinant protein. To complement this, we rapidly characterize a range of DNA parts with different reporters, express high G+C (%) biosynthetic genes, and demonstrate an initial proof of concept for combined transcription, translation, and biosynthesis of Streptomyces metabolic pathways in a single “one-pot” reaction.
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