计算机辅助重建和应用Bacillus haloduransS7西兰酶具有耐热和抗的电脑辅助重建和应用
Huimin Zhou1, Yongchao Cai1, Mengfei Long1
1Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.
Journal of agricultural and food chemistry
|January 6, 2024
概括
计算机辅助设计增强了-1,4-内素酶的稳定性和活性,用于基纤维素生物质利用. 改进的酶有效地将农业废物水解成有价值的氧化糖.
科学领域:
- 生物技术和酶工程 生物技术和酶工程
- 生物质转换生物质转换
- 蛋白质工程是一种蛋白质工程.
背景情况:
- 乙-1,4-内氧基酶对于在纤维素生物质利用中的西兰降解至关重要.
- 酶稳定性不佳限制了它在恶劣的工业条件下 (高温和性pH) 的应用.
研究的目的:
- 为了增强来自 *Bacillus halodurans* S7 的β-1,4-内氧化酶的稳定性和活性,用于工业应用.
- 开发一种用于在极端条件下提高酶性能的计算策略.
主要方法:
- 计算机辅助设计利用同热压缩性 (βT) 扰动工程.
- 整合了三种热稳定性预测算法 (ICPE-TPA) 用于变体选择.
- 酶变体的活性,热量和性耐药性的表征.
主要成果:
- 工程变体R69F/E137M/E145L显著改善了特定活性 (增加了4.9倍).
- 这种变种表现出了显著的耐热性 (70°C) 和抗性 (pH9.0).
- 观察到温度半衰期 (39.4倍增加) 和pH半衰期 (57.6倍增加) 的增长.
- 在水解农业废弃物 (玉米,硬木纸) 中成功应用,以产生氧化.
结论:
- ICPE-TPA策略有效地改善了在极端条件下酶的功能性能.
- 经过工程改造的β-1,4-内氧化酶具有很高的潜力,可以高价值地利用纤维蛋白生物质.
- 这种方法为为工业生物技术开发强大的酶提供了一条途径.
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