由SiO2纳米结构材料屏蔽的乳酸酶催化活性:一种in vitro和in silico方法
Javier Ivan Wong-Romero1,2, Abraham Vidal-Limon3, Sergio A Aguila1
1Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada, Baja California.
Journal of biomolecular structure & dynamics
|June 16, 2023
概括
在纳米结构的二氧化材料上固定乳酶可显著提高其稳定性和催化性能. Laccase@MSU-F显示稳定性增加了三倍,显示了改进酶应用的潜力.
科学领域:
- 生物催化和酶工程 生物催化和酶工程
- 材料科学和纳米技术材料科学和纳米技术
- 生物化学 生化学
背景情况:
- 酶固定对于提高酶的稳定性和可重复使用性在工业应用中至关重要.
- 纳米结构的中孔材料提供了高表面积和可调节的孔隙结构,用于酶封装.
- 乳糖酶是一种多功能酶,在各种领域都有应用,但其运行稳定性可能受到限制.
研究的目的:
- 为了研究laccase在SBA-15,MCF和MSU-F纳米结构的中等孔材料上的固定.
- 为了评估在各种条件下固定式laccase的增强的酶催化性能和操作稳定性.
- 通过分子动力学模拟,阐明固定乳糖酶稳定性改善的机制.
主要方法:
- 在SBA-15,MCF和MSU-F基上酶固定乳酶.
- 在不同的热水,pH和溶剂条件下进行酶活性测定.
- 分子动力学模拟用于分析酶支持相互作用和稳定机制.
主要成果:
- 与自由相比,在纳米结构的材料上固定的酸盐表现出显著增强的操作稳定性.
- Laccase@MSU-F显示稳定性增加了三倍,在广泛的pH范围 (4.5-10.0) 中保持活性.
- 分子动力学模拟表明,静电相互作用和保护性限制效应有助于提高酶稳定性.
结论:
- 纳米结构的中孔材料有效地提高了固定酸盐的稳定性和催化性能.
- MSU-F支持提供了优越的保护,从而大大提高了乳稳定性.
- 这项研究强调了纳米材料在生物技术应用中开发强大且可回收的酶系统的潜力.
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