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Alexander Gorel¹, Robert L Shoeman¹, Elisabeth Hartmann¹

¹Max Planck Institute for Medical Research, Jahnstrasse 29, 69120 Heidelberg, Germany.

|October 13, 2025

概括

纸上芯片 (SOS) 能够进行串行晶体学,但可能导致辐射损伤. 在先进的同步子上进行的新实验表明,损伤效应因光束线而异,需要谨慎的数据收集策略.

科学领域:

结构生物学是结构生物学.
晶体学晶体学是指结晶学.
同步子辐射科学是同步子辐射科学.

背景情况:

纸上片 (SOS) 芯片是一种多功能样本输送方法,用于同步子和X射线自由电子激光器 (XFEL) 的串行晶体学.
在SOS芯片上缺乏模式限制,允许不同的晶体大小和环境,但也可能导致来自热量,激素或气体扩散到相邻晶体的辐射损伤.

研究的目的:

评估SOS芯片在先进的同步仪器设备 (ESRF-EBS ID29和SwissFEL Cristallina-MX) 无损连续数据收集的适用性.
为了研究辐射损伤对血液蛋白DtpAa的微晶的影响,该蛋白因其对辐射敏感的铁-水键而闻名.

主要方法:

在ESRF-EBS的ID29光线和SwissFEL的Cristallina-MX站上使用SOS芯片进行串行X射线晶体学 (SSX) 数据收集.
分析结构变化,衍射强度和在不同X射线暴露阶段大小的晶格行为.

主要成果:

从ID29SSX数据的结构中,没有观察到血水连接体距离的显著变化.
在ID29的衍射强度表明了全球辐射损伤 (布拉格终结),而在所有ID29数据集中观察到体几何和胺-铁键的局部损伤.
来自Cristallina-MX的连续秒结晶学 (SFX) 数据显示,X射线阶段大小≤20μm的晶格阶段过渡,可能是由于加热或脱水.

结论:

辐射损伤,全球和本地,可以发生在连续数据采集与SOS芯片在第四代同步仪,即使在短时间的曝光.
梁线之间的损伤概况 (ID29与Cristallina-MX) 的差异凸显了需要针对梁线进行特定优化.
在Cristallina-MX观测到的晶格格子相位过渡表明了超出直接辐射效应的潜在损伤机制.
警和仔细的实验设计对于在先进的光源上使用SOS芯片时减轻辐射损伤至关重要.

关键词:

SFX SFX 的意思是这是一个SOS芯片.这就是SSX SSX.剂量速率是指剂量的速度.有一个固定目标,一个固定目标.金属蛋白质是一种金属蛋白质.辐射损伤辐射损伤在室温室温.连续晶体学是指连续的晶体学.

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