华东理工大学,生物反应器工程国家重点实验室,上海 200237
[ "赖铭元(1997—),男,博士研究生。研究方向为新酶挖掘与分子改造E-mail:y30200594@mail.ecust.edu.cn" ]
[ "郁惠蕾(1980—),女,博士,教授。研究方向为:(1)新酶基因挖掘和理性设计方法开;(2)新型萜类羟化酶的发现和分子改造;(3)非天然硫醚单加氧酶的进化和应用;(4)系统生物催化合成重要精细化学品E-mail:huileiyu@ecust.edu.cn" ]
收稿:2022-05-16,
修回:2022-07-07,
纸质出版:2022-12-31
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赖铭元, 韦健, 许建和, 郁惠蕾. 非特异性过加氧酶(UPO)的研究综述[J]. 合成生物学, 2022, 3(6): 1235-1249
LAI Mingyuan, WEI Jian, XU Jianhe, YU Huilei. Review of research on unspecific peroxygenases (UPOs)[J]. Synthetic Biology Journal, 2022, 3(6): 1235-1249
赖铭元, 韦健, 许建和, 郁惠蕾. 非特异性过加氧酶(UPO)的研究综述[J]. 合成生物学, 2022, 3(6): 1235-1249 DOI: 10.12211/2096-8280.2022-028.
LAI Mingyuan, WEI Jian, XU Jianhe, YU Huilei. Review of research on unspecific peroxygenases (UPOs)[J]. Synthetic Biology Journal, 2022, 3(6): 1235-1249 DOI: 10.12211/2096-8280.2022-028.
未活化的C—H键选择性插入活性氧是目前有机合成面临的最具挑战性之一。真菌非特异性过加氧酶(UPO)是一类高度糖基化的硫代血红素酶,催化的反应包括正构烷烃中未活化的C—H键的羟基化、烯烃和芳烃的环氧化、含杂原子(N、S)化合物的氧化、乙醚裂解、
N
-脱烷基化、脱酰化和酚类的单电子氧化。UPO以H
2
O
2
为氧供体与电子受体,不需要任何辅因子,是目前最具发展潜力的氧化酶之一。然而,UPO的异源表达困难与选择性差的问题仍限制着UPO的发展。近两年,通过信号肽改造或更换的方法在UPO的异源表达方面取得了重要突破,对UPO结构功能关系的深入研究以及蛋白结构预测算法的发展也将助力UPO的分子改造,为解决UPO选择性差的问题奠定基础。本文聚焦于UPO的异源表达、选择性问题与H
2
O
2
原位再生,综述了UPO的最新发展以及存在的技术瓶颈,并对解决这些瓶颈问题的方案做出展望。
The selective insertion of oxygen species through unactivated C—H bonds is one of the most challenging tasks in organic synthesis. Fungal unspecific peroxygenases (UPOs) are a class of highly glycosylated thioheme enzymes that catalyze reactions including hydroxylation of unactivated C—H bonds in n-alkanes
epoxidation of alkenes and aromatics
oxidation of heteroatom (N
S) compounds
ether cleavage
N
-dealkylation
deacylation and one-electron oxidation of phenols. As one of the most promising oxidases in synthetic chemistry
UPOs use H
2
O
2
as the oxygen donor and the electron acceptor
and do not require cofactors other than heme. This paper reviews the classification and development process of UPOs
and focuses on the heterologous expression
selectivity engineering and H
2
O
2
in situ
regeneration of UPOs. Since the first discovery of UPOs from
Agrocybe aegerita
in 2004
UPOs have attracted much attention due to the advantages described above. However
the difficulties of heterologous expression and poor selectivity of UPOs still limit their development. The difficulty of heterologous expression makes it hard to mine new variants of UPOs
and native UPOs are difficult to be characterized and applied in biocatalysis due to the slow growth rate of their hosts. In the past two years
important breakthroughs have been made in the heterologous expression of UPOs through the modification or replacement of signal peptides
revealing the important role of signal peptides in this process. However
the specific role of signal peptides in the secretory ex
pression and three-dimensional structure formation of UPOs remain elusive. With the in-depth research on the mechanism of signal peptides affecting the heterologous expression of UPOs and the development of artificial intelligence (AI) algorithms
the combination of genome mining and signal peptide prediction will be the key for discovering new UPOs. The poor selectivity of UPOs also hinders the development and application of UPOs. This paper reviews different types of reactions that UPOs catalyze
and reveals the problem that UPOs have broad substrate range but poor selectivity. In-depth research on the structure-function relationship of UPOs and the development of protein structure prediction algorithms will help the engineering of UPOs and lay a foundation for solving the problem of poor substrate selectivity. This paper also compares several methods for the
in situ
regeneration of H
2
O
2
and concluded that the multi-enzyme cascade method is the most economical and practical method for the
in situ
regeneration of H
2
O
2
.
2
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