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基于工程性氨酸过氧化酶的热塑性聚氨塑料的增强降解

Huan Li¹, Shengjie Yuan¹, Ling Chen¹

¹State Key Laboratory of Water Pollution Control and Green Resource Recycling, School of Environment, Nanjing University, Nanjing 210023, PR China.

Enzyme and microbial technology

|November 26, 2025

概括

工程性氨酸过氧化酶 (LiP) 突变体和多酶系统显著增强了芳香热塑性聚氨 (TPU) 的降解. 这种绿色酶方法为塑料废物管理提供了可持续的解决方案.

科学领域:

生物技术是生物技术.
环境科学环境科学
聚合物科学聚合物科学

背景情况:

热塑性聚氨 (TPU) 是一种具有复杂物理交联的弹性聚合物,可以抵抗自然降解.
目前用于降解芳香TPU的方法,特别是,显示效率低.
开发有效和环保的TPU废弃物降解策略对于环境可持续性至关重要.

研究的目的:

通过使用氨酸过氧化酶 (LiP) 来研究芳香TPU的降解.
通过蛋白质工程和多酶系统建设来提高LiP的降解效率.
为芳香TPU塑料废物管理提供可持续的酶溶液.

主要方法:

野生型LiP (WT-LiP) 在Pichia pastoris中的重组表达.
使用分子对接来识别和引入关键突变 (F46W,H47W,H175R) 的LiP的蛋白质工程.
构建和评估多酶系统,包括LiP-过氧化酶-乳酶和LiP-碳烯酶.

主要成果:

与WT-LiP相比,工程LiP突变F46W显示分子重量降解率增加了2.2倍 (11.97%与2.22%在3天内).
在28天的时间里,F46W突变体实现了26.59%的降解效率.
LiP-carboxylesterase多酶系统在3天内表现出优异的性能,分子质量降解29.20%,体重减轻5.07%.

结论:

LiP的蛋白质工程显著提高了其降解芳香TPU的有效性.
多酶系统,特别是LiP-carboxylesterase,为增强TPU降解提供了一种协同方法.
这项研究提出了一个有前途的绿色酶途径,用于有效降解芳香TPU,为可持续的塑料废物管理做出贡献.

关键词:

降解降解是一种降解.红素过氧化酶是什么?分子对接是分子对接.多酶系统是多酶系统.热塑性聚氨是一种热塑性聚氨.

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