Exploration and heterologous expression of laccase genes and pesticide degradation ability of laccases from Cerrena unicolor GC.u01.

IF 4 3区 生物学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Jie Chu, Xiaoxiao Zhang, Ruihong Sun, Yuanqiang Lv, Zhuran Hu, Wenjuan Zhang, Xiaoran Shen, Yanhua Huang
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引用次数: 0

Abstract

Laccases are valuable industrial enzymes with applications across various fields. While heterologous expression in Pichia pastoris is a common strategy, current approaches face limitations in yield, stability, and catalytic efficiency against recalcitrant agrochemicals. In this study, we sequenced and annotated the first high-quality genome of Cerrena unicolor strain GC.u01 (30.95 Mb, 8,089 genes), revealing a unique laccase gene family comprising nine members. Structural analysis revealed novel catalytic motifs in Lac2, which was successfully expressed in P. pastoris GS115 through codon optimization, yielding a novel recombinant enzyme (70 kDa) with exceptional pH stability (retaining > 80% activity at pH 3.0-8.0 for 24 h) and thermotolerance (> 60% activity at 40 °C), surpassing most reported fungal laccases. Notably, Lac2 demonstrated unprecedented degradation efficiency for azoxystrobin (96.2) and phoxim (30.7%)-the first report of a Cerrena unicolor laccase degrading these pesticides-achieving significantly higher rates than previously described laccases under similar conditions. This study integrates genome mining, enzyme engineering, and functional validation to establish a new paradigm for developing robust biocatalysts against recalcitrant agrochemicals. These unique characteristics of Lac2 suggest the potential of this enzyme in biotechnological and industrial applications.

单色Cerrena GC.u01漆酶基因的探索、异源表达及降解农药能力。
漆酶是一种有价值的工业酶,应用于各个领域。虽然在毕赤酵母中异源表达是一种常见的策略,但目前的方法在产量、稳定性和对顽固性农用化学品的催化效率方面存在局限性。在这项研究中,我们测序和注释了Cerrena单色菌株GC的第一个高质量基因组。u01 (30.95 Mb, 8,089个基因),揭示了一个独特的漆酶基因家族,包括9个成员。结构分析揭示了Lac2中新的催化基序,该酶通过密码子优化在P. pastoris GS115中成功表达,产生了一个新的重组酶(70 kDa),具有优异的pH稳定性(在pH 3.0-8.0下保持> 80%的活性24小时)和耐热性(在40°C下保持> 60%的活性),超过了大多数报道的真菌漆酶。值得注意的是,Lac2对偶氮嘧菌酯(96.2)和硫辛硫磷(30.7%)的降解效率是前所未有的,这是Cerrena单色漆酶降解这些农药的首次报道,在类似条件下,其降解率明显高于先前描述的漆酶。本研究整合了基因组挖掘、酶工程和功能验证,为开发抗顽固性农用化学品的强效生物催化剂建立了新的范例。Lac2的这些独特特性表明了该酶在生物技术和工业应用中的潜力。
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来源期刊
World journal of microbiology & biotechnology
World journal of microbiology & biotechnology 工程技术-生物工程与应用微生物
CiteScore
6.30
自引率
2.40%
发文量
257
审稿时长
2.5 months
期刊介绍: World Journal of Microbiology and Biotechnology publishes research papers and review articles on all aspects of Microbiology and Microbial Biotechnology. Since its foundation, the Journal has provided a forum for research work directed toward finding microbiological and biotechnological solutions to global problems. As many of these problems, including crop productivity, public health and waste management, have major impacts in the developing world, the Journal especially reports on advances for and from developing regions. Some topics are not within the scope of the Journal. Please do not submit your manuscript if it falls into one of the following categories: · Virology · Simple isolation of microbes from local sources · Simple descriptions of an environment or reports on a procedure · Veterinary, agricultural and clinical topics in which the main focus is not on a microorganism · Data reporting on host response to microbes · Optimization of a procedure · Description of the biological effects of not fully identified compounds or undefined extracts of natural origin · Data on not fully purified enzymes or procedures in which they are applied All articles published in the Journal are independently refereed.
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