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Improvement of hydrogen peroxide stability of Pleurotus eryngii versatile ligninolytic peroxidase by rational protein engineering
Bao, Xue1,2; Huang, Xuenian1; Lu, Xuefeng1; Li, Jian-Jun1
2014-01-10
发表期刊ENZYME AND MICROBIAL TECHNOLOGY
卷号54期号:2014页码:51-58
摘要Peroxide tolerant versatile peroxidases are required for industrial applications. In this study, rational protein engineering was performed to improve the oxidative stability of Pleurotus eryngii versatile ligninolytic peroxidase. Residues which are easily oxidized such as methionine, and close to H2O2-binding pocket and heme were identified for site-directed mutagenesis. Enzyme activity and steady-state kinetics were affected to different extent by different mutations. They were investigated for H2O2 stability, among which mutants A79L, P141A, M247L, M265L, M247L/M265L, A77E/181L, A77E/A79S/I81L, A77S/A79L/I81L, A77E/A79S/I81L/M265L, A77E/A79S/I81L/M247L/M265L, and A77E/A79S/I81L/S168A showed significantly increased oxidative tolerance, proving that oxidizable residues such as Met247 and Met265, residues close to heme like Pro141 and H2O2-binding pocket such as Ala77, Ala79, and Ile81 exerted important impact on H2O2 stability. Double and triple mutants demonstrated some additive or synergistic effects, which were only inactivated by higher concentration H2O2, whereas multiple mutants A77E/A79S/I81L/M265L, A77E/A79S/I81L/M247L/M265L, and A77E/A79S/I81L/S168A did not. Importantly, mutants I81L, S168A, Met265, M247L/M265L, A77E/A79S/I81L, and A77E/A79S/I81L/M247L/M265L exhibited both improved catalytic efficiencies and H2O2 resistance. The enhanced oxidative stability could result from delayed or suppressed compound III formation and/or heme bleaching caused by replacement of some residues. The identified mutants with higher oxidative tolerance and catalytic efficiencies would be helpful for further improving the oxidative stability of versatile peroxidase. (C) 2013 Elsevier Inc. All rights reserved.
文章类型Article
关键词Versatile Peroxidase H2o2 Stability Rational Protein Engineering
学科领域生物代谢工程
WOS标题词Science & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.enzmictec.2013.10.003
关键词[WOS]SITE-DIRECTED MUTAGENESIS ; MANGANESE PEROXIDASE ; PHANEROCHAETE-CHRYSOSPORIUM ; HORSERADISH-PEROXIDASE ; ASCORBATE PEROXIDASE ; OXIDATION SITES ; H2O2 STABILITY ; EXPRESSION ; INACTIVATION ; EVOLUTION
收录类别SCI
语种英语
WOS研究方向Biotechnology & Applied Microbiology
WOS类目Biotechnology & Applied Microbiology
WOS记录号WOS:000329531000009
引用统计
文献类型期刊论文
条目标识符http://ir.qibebt.ac.cn/handle/337004/1653
专题微生物代谢工程研究组
作者单位1.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biofuels, Qingdao 266101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Bao, Xue,Huang, Xuenian,Lu, Xuefeng,et al. Improvement of hydrogen peroxide stability of Pleurotus eryngii versatile ligninolytic peroxidase by rational protein engineering[J]. ENZYME AND MICROBIAL TECHNOLOGY,2014,54(2014):51-58.
APA Bao, Xue,Huang, Xuenian,Lu, Xuefeng,&Li, Jian-Jun.(2014).Improvement of hydrogen peroxide stability of Pleurotus eryngii versatile ligninolytic peroxidase by rational protein engineering.ENZYME AND MICROBIAL TECHNOLOGY,54(2014),51-58.
MLA Bao, Xue,et al."Improvement of hydrogen peroxide stability of Pleurotus eryngii versatile ligninolytic peroxidase by rational protein engineering".ENZYME AND MICROBIAL TECHNOLOGY 54.2014(2014):51-58.
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