GraFix: sample preparation for single-particle electron cryomicroscopy

GraFix: sample preparation for single-particle electron cryomicroscopy
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DOI:
10.1038/nmeth1139
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发表时间:
2008-01-01
期刊:
影响因子:
48
通讯作者:
Stark, Holger
Stark, Holger
中科院分区:
生物学1区
文献类型:
--
作者:
Kastner, Berthold;Fischer, Niels;Stark, Holger

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我们开发了一种名为GraFix的方法,该方法大大提高了单粒子电子低温显微镜(cryo-EM)结构测定的样品质量。GraFix使用甘油梯度离心步骤,其中将复合物离心到浓度增加的化学固定试剂中,以防止聚集并稳定单个大分子。该方法可用于制备阴性染色、冷冻阴性染色,特别是未染色冷冻EM的样品。
We developed a method, named GraFix, that considerably improves sample quality for structure determination by single-particle electron cryomicroscopy (cryo-EM). GraFix uses a glycerol gradient centrifugation step in which the complexes are centrifuged into an increasing concentration of a chemical fixation reagent to prevent aggregation and to stabilize individual macromolecules. The method can be used to prepare samples for negative-stain, cryo-negative-stain and, particularly, unstained cryo-EM.