Tricin Biosynthesis and Bioengineering

文献类型： 外文期刊

第一作者： Lam, Pui Ying

作者： Lam, Pui Ying;Umezawa, Toshiaki;Tobimatsu, Yuki;Lui, Andy C. W.;Lo, Clive;Wang, Lanxiang;Liu, Hongjia

作者机构： Kyoto Univ, Res Inst Sustainable Humanosphere, Kyoto, Japan;Univ Hong Kong, Sch Biol Sci, Pokfulam, Hong Kong, Peoples R China;Chinese Acad Sci, Shenzhen Inst Synthet Biol, Shenzhen Inst Adv Technol, CAS Key Lab Quantitat Engn Biol, Shenzhen, Peoples R China;Zhejiang Acad Agr Sci, State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou, Peoples R China

关键词： tricin; biosynthetic pathways; flavonoids; lignin; bioengineering; biorefinery

期刊名称：FRONTIERS IN PLANT SCIENCE （ 2020影响因子：5.754； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2021 年 12 卷

页码：

收录情况： SCI

摘要： Tricin (3',5'-dimethoxyflavone) is a specialized metabolite which not only confers stress tolerance and involves in defense responses in plants but also represents a promising nutraceutical. Tricin-type metabolites are widely present as soluble tricin O-glycosides and tricin-oligolignols in all grass species examined, but only show patchy occurrences in unrelated lineages in dicots. More strikingly, tricin is a lignin monomer in grasses and several other angiosperm species, representing one of the "non-monolignol" lignin monomers identified in nature. The unique biological functions of tricin especially as a lignin monomer have driven the identification and characterization of tricin biosynthetic enzymes in the past decade. This review summarizes the current understanding of tricin biosynthetic pathway in grasses and tricin-accumulating dicots. The characterized and potential enzymes involved in tricin biosynthesis are highlighted along with discussion on the debatable and uncharacterized steps. Finally, current developments of bioengineering on manipulating tricin biosynthesis toward the generation of functional food as well as modifications of lignin for improving biorefinery applications are summarized.

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