From Bugs to Bioplastics: Total (+)-Dihydrocarvide Biosynthesis by Engineered Escherichia coli.
From Bugs to Bioplastics: Total (+)-Dihydrocarvide Biosynthesis by Engineered Escherichia coli.
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DOI:
10.1002/cbic.201800606
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发表时间:
2019-03-15
期刊:
影响因子:
--
通讯作者:
Scrutton NS
中科院分区:
文献类型:
--
作者:
Ascue Avalos GA;Toogood HS;Tait S;Messiha HL;Scrutton NS
The monoterpenoid lactone derivative (+)‐dihydrocarvide ((+)‐DHCD) can be polymerised to form shape‐memory polymers. Synthetic biology routes from simple, inexpensive carbon sources are an attractive, alternative route over chemical synthesis from (R)‐carvone. We have demonstrated a proof‐of‐principle in vivo approach for the complete biosynthesis of (+)‐DHCD from glucose in Escherichia coli (6.6 mg L−1). The pathway is based on the Mentha spicata route to (R)‐carvone, with the addition of an ′ene′‐reductase and Baeyer–Villiger cyclohexanone monooxygenase. Co‐expression with a limonene synthesis pathway enzyme enables complete biocatalytic production within one microbial chassis. (+)‐DHCD was successfully produced by screening multiple homologues of the pathway genes, combined with expression optimisation by selective promoter and/or ribosomal binding‐site screening. This study demonstrates the potential application of synthetic biology approaches in the development of truly sustainable and renewable bioplastic monomers. Sustainable, renewable bioplastic monomers: The monoterpenoid (+)‐ DHCD can be polymerised to form shape‐memory polymers. We have demonstrated a proof‐of‐principle approach to the complete biosynthesis of (+)‐ DHCD from glucose in E. coli, based on a modified M. spicata biosynthetic pathway. This route from a simple, inexpensive carbon source is more attractive than the alternative chemical synthesis from (R)‐carvone.
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