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在现场的反扩散结晶和长期的晶体保存在微流体固定目标的串行结晶学

Zhongrui Liu^1,2, Kevin Gu², Megan Shelby³

¹Department of Materials Science and Engineering University of California Davis Davis CA95616 USA.

Journal of applied crystallography

|October 10, 2024

概括

在微流体芯片中的反扩散结晶产生更大,更高质量的蛋白质晶体. 这种用户友好的固定目标方法简化了晶体处理,并改善了用于结构生物学的X射线衍射数据.

科学领域:

晶体学晶体学是指结晶学.
结构生物学结构生物学
材料科学材料科学材料科学

背景情况:

反扩散结晶化为蛋白质晶体生长提供了比批量和蒸汽扩散方法的优势.
目前用于反扩散结晶的固定目标装置有限.
现有的方法往往需要复杂的晶体处理X射线衍射.

研究的目的:

介绍2D聚合物微流体固定目标芯片中集成的对抗扩散室的用户友好设计.
详细介绍使用常见薄膜材料快速制造这些微流体芯片的方法.
为优化核和晶体生长提供指导方针,同时尽量减少样品消耗.

主要方法:

使用Mylar,烯和Kapton薄膜制造2D聚合物微流体芯片.
在微流体芯片中开发用户友好的反扩散室.
为核和生长优化结晶条件的优化.
在微流体芯片内对晶体进行直接的X射线衍射分析.

主要成果:

大型蛋白质晶体的成功生长,并保持长时间的水分.
在X射线光线线上直接使用微流体芯片的演示,保持晶体质量.
在室温下获得1.32 Å分辨率的光活性黄色蛋白质衍射数据.
简化了芯片制造和增强了真空下的稳定性.

结论:

展示的微流体固定目标芯片设计为培养大型蛋白质晶体提供了可靠的方法.
这种方法简化了晶体处理,减少了背景散射,并保留了X射线衍射的晶体质量.
预计微流体固定目标技术的进步将增加其在晶体学中的采用.

关键词:

在X射线中,散射是X射线的散射.在XFELs中使用XFEL.对抗扩散的反扩散.在现场 (in situ) 进行.长期的晶体保存长期的晶体保存微流体的固定目标蛋白质衍射蛋白质的衍射方式连续晶体学是指连续的晶体学.在真空中运行.

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