Fitting atomic models into electron-microscopy maps

被引:163
作者
Rossmann, MG [1 ]
机构
[1] Purdue Univ, Dept Biol Sci, W Lafayette, IN 47907 USA
来源
ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY | 2000年 / 56卷
关键词
D O I
10.1107/S0907444900009562
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Combining X-ray crystallographically determined atomic structures of component domains or subunits with cryoelectron microscopic three-dimensional images at around 22 Angstrom resolution can produce structural information that is accurate to about 2.2 Angstrom resolution. In an initial step, it is necessary to determine accurately the absolute scale and absolute hand of the cryo-electron microscopy map, the former of which can be off by up to 5%. It is also necessary to determine the relative height of density by using a suitable scaling function. Difference maps can identify, for instance, sites of glycosylation, the position of which helps to rt the component structures into the EM density maps. Examples are given from the analysis of alphaviruses, rhinovirus-receptor interactions and poliovirus-receptor interactions.
引用
收藏
页码:1341 / 1349
页数:9
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