磁场影响酶性ATP合成
Anatoly L Buchachenko1, Dmitry A Kuznetsov
1N.N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow 119991, Russia. abuchach@chph.ras.ru
Journal of the American Chemical Society
|September 9, 2008
概括
磁场影响了肌酸酶中的ATP合成. 特定的同位素 (25Mg) 显著提高ATP产量,揭示了这种酶中的离子基机制.
科学领域:
- 生物化学 生物化学
- 酶学 是一种酶学.
- 生物物理学的生物物理.
背景情况:
- 肌酸激酶 (CK) 对于细胞能量平衡至关重要.
- 磁场和同位素在酶反应中的作用是一个新兴的研究领域.
- 维佩拉桑提亚 (Vipera xanthia) 毒液含有具有潜在生物技术应用的酶.
研究的目的:
- 为了研究磁场对来自Vipera xanthia毒素的肌酸激酶对ATP合成的影响.
- 探索不同磁性性质的 (Mg2+) 同位素对酶活性的影响.
- 阐明磁场和同位素对ATP产生影响的潜在机制.
主要方法:
- 从Vipera xanthia毒液中净化肌酸激酶.
- 在不同静态磁场强度下测试ATP合成速率 (例如55mT,80mT).
- 在酶的催化部位使用同位素 (24Mg,25Mg,26Mg) 进行比较分析.
主要成果:
- ATP合成速率显示出一个取决于场的反应.
- 具有24Mg2+和26Mg2+的酶在55mT时显示ATP产量增加7-8%,在80mT时下降.
- 含有25Mg2+的酶显示出显著更高的ATP产量增加 (50%在55mT,70%在80mT).
- 在地球磁场中观察到25Mg的酶的ATP合成率是25Mg的酶的2.5倍,而不是24Mg或26Mg的酶.
结论:
- 通过肌酸激酶合成ATP显然受到磁场和同位素的影响.
- 观察到的磁性同位素效应强烈表明了离子基机制.
- 在中间离子-激素对中,齐曼相互作用和高精度合是影响反应路径的关键因素.
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