期刊
METABOLIC ENGINEERING COMMUNICATIONS
卷 10, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.mec.2020.e00125
关键词
Cyanobacteria; Synechocystis; Metabolic engingeering; Terpenoid biosynthesis; Squalene
资金
- Swedish Energy Agency [38334-1]
- Carl Trygger Foundation [CTS 11:266]
- NordForsk Nordic Center of Excellence program NordAqua [82845]
Squalene is a triterpene which is produced as a precursor for a wide range of terpenoid compounds in many organisms. It has commercial use in food and cosmetics but could also be used as a feedstock for production of chemicals and fuels, if generated sustainably on a large scale. We have engineered a cyanobacterium, Synechocystis sp. PCC 6803, for production of squalene from CO2. In this organism, squalene is produced via the methylerythritol-phosphate (MEP) pathway for terpenoid biosynthesis, and consumed by the enzyme squalene hopene cyclase (Shc) for generation of hopanoids. The gene encoding Shc in Synechocystis was inactivated (Delta shc) by insertion of a gene encoding a squalene synthase from the green alga Botryococcus braunii, under control of an inducible promoter. We could demonstrate elevated squalene generation in cells where the algal enzyme was induced. Heterologous overexpression of genes upstream in the MEP pathway further enhanced the production of squalene, to a level three times higher than the.shc background strain. During growth in flat panel bioreactors, a squalene titer of 5.1 mg/L of culture was reached.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据