抗蛋白之间的协同作用是由互补的冰结合驱动的
Tehilla Berger1, Konrad Meister2, Arthur L DeVries3
1Department of Chemistry and Biochemistry , Yeshiva University , New York , New York 10016 , United States.
Journal of the American Chemical Society
|November 12, 2019
概括
抗蛋白 (AFP) 可以协同工作以抑制冰的生长. 这项研究表明,当不同的AFP类型与不同的冰晶平面结合时,会产生协同作用,这解释了它们在适应寒冷的生物中的分布.
科学领域:
- 生物物理
- 低温生物学
- 分子生物学
背景情况:
- 适应寒冷的生物具有多种抗蛋白 (AFGP) 异型,具有不同的抑制冰的活性.
- 混合AFP可以表现出协同增强,但潜在的机制尚不清楚.
研究的目的:
- 通过AF(G) P的混合物阐明协同冰增长抑制的机制.
- 为了将AFP结合行为与协同作用或对抗作用相关联.
主要方法:
- 使用冷阶段显微镜,微流体学和光显微镜研究AF(G) P的二进制混合物.
- 测量了来自不同物种的AF(G) P混合物的冰增长抑制活性.
- 使用差异标记的异构体可视化了AFP与冰晶平面的结合.
主要成果:
- 一些AF(G) P混合物表现出协同作用的冰增长抑制,而其他混合物则表现出因结合点的竞争而引起的对抗作用.
- 协同作用的混合物涉及AF(G) P与不同的冰晶平面结合.
- 一个动态模型被开发出来,表明活跃的异形与镜平面快速结合,促进被动的异形与金字塔平面结合.
结论:
- 该研究提供了AF(G) P协同作用的动力机制,解释了活性和被动异构体如何合作以增强冰的抑制.
- 这些发现有助于解释鱼类中AF(G) P异构体的生物分布.
- 这项研究阐明了多种抑制剂阻碍冰晶生长的物理化学作用.
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