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Suppl. Mater.: 

CLC number: Q556

On-line Access: 2019-11-21

Received: 2019-07-08

Revision Accepted: 2019-09-05

Crosschecked: 2019-10-08

Cited: 0

Clicked: 1974

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Zi-Sheng Luo

https://orcid.org/0000-0001-8232-9739

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Journal of Zhejiang University SCIENCE B 2019 Vol.20 No.12 P.995-1002

http://doi.org/10.1631/jzus.B1900392


Cloning and characterization of an oxiranedicarboxylate hydrolase from Labrys sp. WH-1


Author(s):  Wen-Na Bao, Zi-Sheng Luo, Shi-Wang Liu, Yuan-Feng Wu, Pei-Lian Wei, Gong-Nian Xiao, Yong Liu

Affiliation(s):  College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; more

Corresponding email(s):   luozisheng@zju.edu.cn

Key Words:  Oxiranedicarboxylate hydrolase (ORCH), L(+)-2, 3-Dihydrobutanedioic acid, Characterization, Cloning


Wen-Na Bao, Zi-Sheng Luo, Shi-Wang Liu, Yuan-Feng Wu, Pei-Lian Wei, Gong-Nian Xiao, Yong Liu. Cloning and characterization of an oxiranedicarboxylate hydrolase from Labrys sp. WH-1[J]. Journal of Zhejiang University Science B, 2019, 20(12): 995-1002.

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author="Wen-Na Bao, Zi-Sheng Luo, Shi-Wang Liu, Yuan-Feng Wu, Pei-Lian Wei, Gong-Nian Xiao, Yong Liu",
journal="Journal of Zhejiang University Science B",
volume="20",
number="12",
pages="995-1002",
year="2019",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.B1900392"
}

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%T Cloning and characterization of an oxiranedicarboxylate hydrolase from Labrys sp. WH-1
%A Wen-Na Bao
%A Zi-Sheng Luo
%A Shi-Wang Liu
%A Yuan-Feng Wu
%A Pei-Lian Wei
%A Gong-Nian Xiao
%A Yong Liu
%J Journal of Zhejiang University SCIENCE B
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%D 2019
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B1900392

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T1 - Cloning and characterization of an oxiranedicarboxylate hydrolase from Labrys sp. WH-1
A1 - Wen-Na Bao
A1 - Zi-Sheng Luo
A1 - Shi-Wang Liu
A1 - Yuan-Feng Wu
A1 - Pei-Lian Wei
A1 - Gong-Nian Xiao
A1 - Yong Liu
J0 - Journal of Zhejiang University Science B
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IS - 12
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EP - 1002
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PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B1900392


Abstract: 
Objective: This study aimed to clone and characterize the oxiranedicarboxylate hydrolase (ORCH) from Labrys sp. WH-1. Methods: Purification by column chromatography, characterization of enzymatic properties, gene cloning by protein terminal sequencing and polymerase chain reaction (PCR), and sequence analysis by secondary structure prediction and multiple sequence alignment were performed. Results: The ORCH from Labrys sp. WH-1 was purified 26-fold with a yield of 12.7%. It is a monomer with an isoelectric point (pI) of 8.57 and molecular mass of 30.2 kDa. It was stable up to 55 °C with temperature at which the activity of the enzyme decreased by 50% in 15 min (T5015) of 61 °C and the half-life at 50 °C (t1/2, 50 °C) of 51 min and was also stable from pH 4 to 10, with maximum activity at 55 °C and pH 8.5. It is a metal-independent enzyme and strongly inhibited by Cu2+, Ag+, and anionic surfactants. Its kinetic parameters (Km, kcat, and kcat/Km) were 18.7 mmol/L, 222.3 s−1, and 11.9 mmol/(L·s), respectively. The ORCH gene, which contained an open reading frame (ORF) of 825 bp encoding 274 amino acid residues, was overexpressed in Escherichia coli and the enzyme activity was 33 times higher than that of the wild strain. Conclusions: The catalytic efficiency and thermal stability of the ORCH from Labrys sp. WH-1 were the best among the reported ORCHs, and it provides an alternative catalyst for preparation of L(+)-2,3-Dihydrobutanedioic acid.

双头菌WH-1环氧乙烷二酸水解酶的克隆和酶学性质的研究

目的:克隆双头菌WH-1环氧乙烷二酸水解酶(ORCH)的基因并研究其酶学性质.
创新点:首次获得双头菌ORCH的基因,且该酶催化效率高,热稳定性好.
方法:柱层析纯化ORCH后,进行酶学性质研究;通过蛋白末端测序和PCR获得其基因序列;通过二级结构预测和多序列比对进行ORCH序列分析.
结论:来源于双头菌WH-1的ORCH是迄今报道的催化效率和热稳定性最好的ORCH,为L(+)-2,3-二羟基丁二酸的生产提供了新的催化剂.

关键词:环氧乙烷二酸水解酶;L(+)-2,3-二羟基丁二酸;酶学性质;克隆

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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