通过依赖NADH/Zn2+的氧化还原活性 ribozyme 减少一个化物
Shinya Tsukiji1, Swetansu B Pattnaik, Hiroaki Suga
1Department of Chemistry, University at Buffalo, The State University of New York, 14260-3000, USA.
Journal of the American Chemical Society
|April 22, 2004
概括
这项研究表明,一种酒精脱酶 (ADH) рибо酶可以使用NADH和Zn2+减少甲. 这表明,化物转移反应的可逆性被 ribozymes 催化,类似于蛋白质ADHs.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 催化剂是一种催化剂.
背景情况:
- рибо酶是具有催化活性的RNA分子.
- 酒精脱酶 (ADHs) 是催化酒精的氧化/还原的酶.
- 除了基和基转移之外,由 ribozymes 催化反应的可逆性尚未得到充分证实.
研究的目的:
- 为了研究一种酒精脱酶 (ADH) рибо酶的降解活性.
- 为了探索由 ribozymes 催化的化物转移反应的可逆性.
- 为了比较ADH ribozyme与蛋白质ADHs的催化特性.
主要方法:
- 在试验室中,一种酒精脱酶 (ADH) ribozyme 的演化.
- 在NADH和Zn2+的存在下,通过ADH ribozyme测定甲的减少.
- 将 ribozyme 中介反应的催化速率与自发反应进行比较.
主要成果:
- 该ADH ribozyme证明了使用NADH和Zn2+减少甲的能力.
- 与自发反应相比, ribozyme 实现了超过 6 个数量级的速度加速.
- 该研究确定了由ADH ribozyme催化的化物转移化学的可逆性.
结论:
- ADH ribozyme 具有用于减少甲的催化活性,表明反应可逆性.
- 核酶的活性取决于NADH和Zn2+,反映了蛋白质ADHs的特征.
- 这项工作扩大了对由 ribozymes 催化的化学反应的理解,特别是化物转移.
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