合成生物学 ›› 2020, Vol. 1 ›› Issue (2): 187-211.DOI: 10.12211/2096-8280.2020-002

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工业丝状真菌土曲霉合成生物技术研究进展及展望

黄雪年, 唐慎, 吕雪峰   

  1. 中国科学院青岛生物能源与过程研究所,山东省合成生物学重点实验室,中国科学院生物燃料重点实验室,山东 青岛 266101
  • 收稿日期:2020-02-26 修回日期:2020-03-23 出版日期:2020-04-30 发布日期:2020-08-04
  • 作者简介:黄雪年(1986—),男,博士,副研究员,主要从事丝状真菌天然产物生物合成研究。E-mail:huangxn@qibebt.ac.cn|吕雪峰(1974—),男,博士,研究员,主要从事光合蓝细菌、丝状真菌等微生物的代谢工程与合成生物学研究。E-mail:lvxf@qibebt.ac.cn
  • 基金资助:
    中国科学院科技服务网络计划(STS计划)(KFS-STS-QYZX-118);山东省泰山学者人才工程;山东省自然科学基金(ZR2019BC014)

Progress and prospect for synthetic biology research of the industrial filamentous fungi Aspergillus terreus

Xuenian HUANG, Shen TANG, Xuefeng LV   

  1. Shandong Provincial Key Laboratory of Synthetic Biology, Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong,China
  • Received:2020-02-26 Revised:2020-03-23 Online:2020-04-30 Published:2020-08-04

摘要:

丝状真菌作为一类重要的微生物,在食品、医药、化工等国计民生领域发挥了重要作用,其合成生物技术的发展已经展示了更大的工业应用潜力。土曲霉是一种非常具有工业生产价值的丝状真菌,是生物基化学品衣康酸和降血脂药物洛伐他汀的工业生产菌,展现出了强大的天然产物合成能力和突出的工业发酵性能,具有成为典型性丝状真菌底盘细胞应用于合成生物技术开发的价值。近年来,在土曲霉工业菌株改造与发酵工艺优化、生物合成机制解析等方面都开展了系列的研究,显著推动了其合成生物技术研究的发展。本文综述了土曲霉合成生物技术工具开发、衣康酸和洛伐他汀工业生产菌株改造优化、次级代谢产物生物合成机制解析等方面的最新研究进展,并对土曲霉的合成生物技术应用前景和发展方向进行了展望。挖掘土曲霉底盘细胞在合成生物学研究中的优势,可以更好地拓展合成生物技术的应用。

关键词: 丝状真菌, 土曲霉, 合成生物学, 细胞工厂, 洛伐他汀, 衣康酸, 天然产物生物合成

Abstract:

Filamentous fungi are a class of important microorganisms, which have played an important role in the fields of industrial sectors and people's daily life for the production of food, medicine, and chemical products. With the development of synthetic biology, filamentous fungi have shown more potentials. Aspergillus terreus is an industrially valuable filamentous fungus, which has been applied in the production of the bio-based chemical itaconic acid and the lipid-lowering drug lovastatin. The excellent synthetic ability of natural products and outstanding fermentation properties of A. terreus have been fully demonstrated through industrial applications. Meanwhile, it has also been acknowledged that A. terreus would be a promising filamentous fungal chassis cell for synthetic biology development. In recent years, many studies have been performed using A. terreus, including genetic engineering of industrial strains, optimization of fermentation processes, elucidation of biosynthetic mechanisms, etc., which have significantly contributed to the development of A. terreus synthetic biology.

Herewith, these recent research advances are reviewed from: 1) Synthetic biology tools for A. terreus. The development of genetic operation systems is introduced, including the characterization and application of promoters and markers and the progress of gene-editing technologies. 2) Industrial cell factory for the lipid-lowering drug lovastatin. In addition to the biosynthetic pathway of lovastatin, the design and construction of an efficient monacolin J-producing cell factory based on the industrial A. terreus strains are introduced in details. 3) Industrial cell factory for the bio-based chemical itaconic acid. The biosynthetic pathway of itaconic acid and the systematic metabolic engineering of the industrial strain are introduced. 4) Biosynthesis of secondary metabolites. The biosynthetic mechanism and research strategies for the secondary metabolites are introduced. 5) The advantages and prospects of A. terreus chassis cells in synthetic biology are summarized, and the practical applications are listed. Based on the research progress of A. terreus and other filamentous fungi, the challenges and future work of A. terreus biosynthesis technology development are proposed, including enriching the genetic element library, developing efficient gene editing methods and building high-throughput evaluation platforms. Addressing these challenges will provide more alternative design strategies for building more efficient cell factories of A. terreus, and will also contribute to promoting synthetic biology research of filamentous fungi.

Key words: Filamentous fungi, Aspergillus terreus, synthetic biology, cell factory, lovastatin, itaconic acid, biosynthesis of natural products

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