对NADH/NAD+电化学潜力和酶活性的相关性,用于研究蛋白质折叠和动力学
Anurag Sinha1, Ashish K Singh2, Supriya Sharma3
1Food Toxicology Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow-226001, Uttar Pradesh, India; Academy of Scientific and Industrial Research (AcSIR), Ghaziabad- 201002, India.
Biochemical and biophysical research communications
|February 1, 2025
概括
开发了一种新的电化学方法来监测蛋白质活性和折叠动力学. 这种无标签的技术为研究蛋白质结构变化及其对生物功能的影响提供了传统方法的替代方案.
科学领域:
- 生物化学 生物化学
- 电化学 电化学 电化学
- 蛋白质科学 蛋白质科学
背景情况:
- 蛋白质的三维结构决定了它的生物活性.
- 压力因素可以改变蛋白质结构,导致错误折叠和聚合.
- 像光谱光度学这样的传统方法在研究蛋白质动力学方面存在局限性.
研究的目的:
- 开发一种新的电化学方法来评估蛋白质活性和折叠动力学.
- 研究离子 (Al3+) 对蛋白质结构和功能的影响.
- 为蛋白质分析提供无标签的替代品.
主要方法:
- 开发一种电化学试验来测量NADH氧化.
- 对NADH检测极限和灵敏度的量化.
- 应用电化学方法来研究马酸脱酶 (MDH) 和葡萄糖-6-酸脱酶 (G6PDH).
- 电化学研究Al3+对酶活性和折叠的影响.
- 使用循环二重化 (CD),提奥夫拉-T (ThT) 和核磁共振 (NMR) 谱学的验证.
主要成果:
- 电化学方法证明了NADH的线性检测范围 (62.5μM到1.0mM) 具有高线性 (R2 = 0.999).
- 对NADH的计算检测极限为16.02μM,灵敏度为1.75 × 103μA mM-1 cm-2.2.
- 该方法成功监测了MDH和G6PDH的酶活性和折叠动力学.
- 电化学分析显示了MDH和G6PDH的Al3+诱导的结构变化,与CD,ThT和NMR发现一致.
结论:
- 已经建立了一种敏感和可靠的无标签电化学方法来研究蛋白质活性和折叠动力学.
- 这种方法为蛋白质结构变化提供了有价值的见解,这些变化是由 Al3+ 等压力因素引起的.
- 开发的技术为蛋白质研究中的传统方法提供了一个有希望的替代方案.
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