拉索贝内诺丁-1是一种热驱动[1]罗塔开关
Chuhan Zong1, Michelle J Wu1, Jason Z Qin1
1Department of Chemistry, ‡Department of Molecular Biology, and §Department of Chemical and Biological Engineering, Princeton University , Princeton, New Jersey 08544, United States.
Journal of the American Chemical Society
|July 12, 2017
概括
合成化学家发现天然的拉索贝内诺丁-1在加热时会在两种形状之间切换. 这种由热引起的切换可能是其生物功能和酶识别的关键.
科学领域:
- 合成化学
- 生物化学
- 分子生物学
背景情况:
- 机械互锁的分子对于开发分子机器至关重要.
- 这些分子可以改变它们的结构以应对外部刺激.
- 拉索是一种具有独特结构的天然产品.
研究的目的:
- 为了研究拉索本诺丁-1的形状转换行为.
- 描述贝内诺丁-1的结构,动力学和能量学.
- 探索本诺丁-1的结构转换的生物学相关性.
主要方法:
- 使用生物物理技术测定贝诺丁-1的结构.
- 热感应变形的动力和热力学分析.
- 酶测试以评估不同贝诺丁-1 基因的裂变,通过拉索异酶.
- 局部定向的突变生成具有改变形状偏好的本诺丁-1 变体.
主要成果:
- 本诺丁-1 呈现出两个不同的螺纹形状之间的热诱导的形状切换.
- 这两种原生体的结构都得到了阐明.
- 单个氨基酸替代可以使本诺丁-1偏向于单个构造,这表明可进化性.
- 只有本丁-1 的原生构造物被其特定的异酶识别和分裂.
结论:
- 拉索本诺丁-1 作为机械互锁的刺激反应分子的自然模型.
- 热诱导的形状转换是贝内诺丁-1的一个关键特征,可能会影响其生物相互作用.
- 一个特定的形体的选择性酶分裂突出了生物系统中的形动态的功能意义.
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