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来自Bacillus safensis的聚乳酸降解脂酶:特征和结构分析

Yujun Wang¹, Wanting Zhang¹, Zhanyong Wang²

¹College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang 110866, China.

International journal of biological macromolecules

|April 28, 2024

概括

研究人员发现了一种新型的多乳酸降解酶,即来自Bacillus safensis的三糖醇脂酶 (TGL). 这种酶在性条件下表现出最佳活性和稳定性,为塑料生物降解应用提供了潜力.

科学领域:

生物化学生物化学
酶学是一种酶学.
微生物学微生物学

背景情况:

聚乳酸 (PLA) 是一种具有越来越多应用的可生物降解聚合物.
有效的PLA降解方法对于环境可持续性至关重要.
酶降解提供了一个有前途和环保的方法.

研究的目的:

确定和描述一种能够降解多乳酸的新型酶.
为了评估酶的活性,稳定性和PLA降解的最佳条件.
调查已识别的酶的结构特征和保存情况.

主要方法:

基因组注释和实时定量PCR用于酶识别和验证.
在各种pH值和温度条件下进行酶活性测定.
对PLA薄膜上的水解产品和表面变化的分析.
对酶的催化三元和保存序列的生物信息分析.

主要成果:

从Bacillus safensis中鉴定出一种可降解乳酸的三糖醇脂酶 (TGL).
在pH 9.0和55°C时,TGL表现出最佳活性,在pH 9.0和45°C时具有稳定性.
该酶侵蚀PLA膜,增加水友性,并产生乳酸单体和双体.
TGL具有一个保存的催化三元体 (Ser77,Asp133,His156) 和一个Ala-X-Ser-X-Gly图案.

结论:

贝西卢斯·萨芬西斯 (Bacillus safensis) 含有具有显著的多乳酸降解能力的TGL.
该酶的最佳条件和结构特征表明其在塑料废物管理中的生物技术应用潜力.
高度的TGL保存表明其在Bacillus属内的强大的酶功能.

关键词:

可生物降解的塑料.酶性水解是一种酶性水解.聚乳酸 (PLA) 是一种聚乳酸.三甲基甘油脂酶是一种三甲基甘油脂酶.

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