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In situ X-ray data collection and structure phasing of protein crystals at Structural Biology Center 19-ID

机译:结构生物学中心19-ID的蛋白质晶体的原位X射线数据收集和结构定相

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摘要

A prototype of a 96-well plate scanner for in situ data collection has been developed at the Structural Biology Center (SBC) beamline 19-ID, located at the Advanced Photon Source, USA. The applicability of this instrument for protein crystal diffraction screening and data collection at ambient temperature has been demonstrated. Several different protein crystals, including selenium-labeled, were used for data collection and successful SAD phasing. Without the common procedure of crystal handling and subsequent cryo-cooling for data collection at T = 100 K, crystals in a crystallization buffer show remarkably low mosaicity (<0.1°) until deterioration by radiation damage occurs. Data presented here show that cryo-cooling can cause some unexpected structural changes. Based on the results of this study, the integration of the plate scanner into the 19-ID end-station with automated controls is being prepared. With improvement of hardware and software, in situ data collection will become available for the SBC user program including remote access.
机译:位于美国高级光子源的结构生物学中心(SBC)光束线19-ID已开发出用于原位数据收集的96孔板扫描仪的原型。已经证明了该仪器在环境温度下用于蛋白质晶体衍射筛选和数据收集的适用性。几种不同的蛋白质晶体(包括硒标记的晶体)被用于数据收集和成功的SAD定相。在没有通用的晶体处理程序和随后的低温冷却(T = 100 K)下进行数据收集的情况下,结晶缓冲液中的晶体显示出极低的镶嵌性(<0.1°),直到因辐射损伤而恶化。此处提供的数据表明,低温冷却会导致一些意想不到的结构变化。根据这项研究的结果,正在准备将平板扫描仪集成到具有自动控制功能的19-ID终端站中。随着硬件和软件的改进,包括远程访问在内的SBC用户程序将可以进行现场数据收集。

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