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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Automated protein crystal structure determination using ELVES
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Automated protein crystal structure determination using ELVES

机译:使用ELVES自动确定蛋白质晶体结构

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摘要

Efficient determination of protein crystal structures requires automated x-ray data analysis. Here, we describe the expert system ELVES and its use to determine automatically the structure of a 12-kDa protein. Multiwavelength anomalous diffraction analysis of a selenomethionyl derivative was used to image the Asn-16-Ala variant of the GCN4 leucine zipper. In contrast to the parallel, dimeric coiled coil formed by the WT sequence, the mutant unexpectedly formed an antiparallel trimer. This structural switch reveals how avoidance of core cavities at a single site can select the native fold of a protein. All structure calculations, including indexing, data processing, locating heavy atoms, phasing by multiwave-length anomalous diffraction, model building, and refinement, were completed without human intervention. The results demonstrate the feasibility of automated methods for determining high-resolution, x-ray crystal structures of proteins.
机译:有效确定蛋白质晶体结构需要自动X射线数据分析。在这里,我们描述专家系统ELVES及其自动确定12 kDa蛋白结构的用途。硒代甲硫酰基衍生物的多波长异常衍射分析用于成像GCN4亮氨酸拉链的Asn-16-Ala变体。与由WT序列形成的平行二聚体卷曲螺旋相反,突变体意外地形成了反平行三聚体。这种结构转换揭示了避免在单个位点出现核心腔可以如何选择蛋白质的天然折叠。所有结构的计算,包括索引,数据处理,重原子的定位,多波长异常衍射的定相,模型的建立和改进,都无需人工干预即可完成。结果证明了确定蛋白质的高分辨率,X射线晶体结构的自动化方法的可行性。

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