从Staphylococcus equorum中提升超氧化物脱酶的热稳定性,通过人工寡合物的形成
Ratna Annisa Utami1, Muhammad Dika Fadillah1, Nanik Aryani Putri1
1Laboratory of Pharmaceutical Biotechnology, Department of Pharmaceutics, School of Pharmacy, Bandung Institute of Technology, Ganesa 10, Bandung, West Java 40132, Indonesia.
Enzyme and microbial technology
|April 5, 2025
概括
带有二硫化键的工程制造的超氧化脱酶 (MnSOD) 酶可以抵抗高温. 这种稳定改善了酶的功能,并为生物技术和医学开辟了新的应用.
科学领域:
- 生物化学 生物化学
- 酶学 是一种酶学.
- 蛋白质工程是指蛋白质的工程.
背景情况:
- 超氧化脱酶 (MnSOD) 对于中和活性氧物种 (ROS) 是至关重要的.
- MnSOD的活性取决于其二维结构,它在热上不稳定,在55°C左右解离.
- 之前在二聚体界面的稳定工作减少了酶活性或稳定性.
研究的目的:
- 为了提高Staphylococcus equorum MnSOD.的热稳定性.
- 为了防止高温二元解离,并保持酶活性.
- 探索共价性修改用于酶稳定性的使用.
主要方法:
- 通过D47C和D47CE115C突变引入分子间二硫化物键.
- 评估热稳定性和二聚体解离温度.
- 在高温下评估酶活性和功能完整性.
主要成果:
- 突变的MnSOD酶通过二硫化物键形成稳定的寡合体.
- 工程酶显示显著增强了热稳定性和对二聚体解离的抗性.
- 酶活性在高温下保持,与野生类型酶不同.
结论:
- 引入分子间二硫化物键有效地稳定了MnSOD二极体.
- 稳定的MnSOD突变在高温下保持功能完整性.
- 这一战略为生物技术和医疗应用提供了潜力,这些应用需要热稳定酶.
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