Predictability and robustness are challenges for bioproduction because of the unstable intracellular synthetic activities. With the deeper understanding of the gene expression process, fine-tuning has become a meaningful tool for biosynthesis optimization. This study characterized several gene expression elements and constructed a multiple inducible system that responds to ten different small chemical inducers in halophile bacterium Halomonas bluephagenesis. Genome insertion of regulators was conducted for the purpose of gene cluster stabilization and regulatory plasmid simplification. Additionally, dynamic ranges of the multiple inducible systems were tuned by promoter sequence mutations to achieve diverse scopes for high-resolution gene expression control. The multiple inducible system was successfully employed to precisely control chromoprotein expression, lycopene and poly-3-hydroxybutyrate (PHB) biosynthesis, resulting in colorful bacterial pictures, optimized cell growth, lycopene and PHB accumulation. This study demonstrates a desirable approach for fine-tuning of rational and efficient gene expressions, displaying the significance for metabolic pathway optimization.
公司名称 | 产品信息 | 采购帮参考价格 |
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麦克林 |
sodium salicylate (Sal)
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¥19.00~¥6984.00 |
麦克林 |
cuminic acid (Cuma)
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¥40.00~¥5419.00 |
上海源叶 |
anhydrotetracycline (aTc)
|
|
麦克林 |
L-arabinose (Ara)
|
|
麦克林 |
3-hydroxytetradecanoyl-homoserine lactone (OHC14)
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Sigma |
PHB powder
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