Symmetry-restrained flexible fitting for symmetric EM maps.
Symmetry-restrained flexible fitting for symmetric EM maps.
复制标题
对称性EM图的对称弹性柔性拟合。
DOI:
10.1016/j.str.2011.07.017
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发表时间:
2011-09-07
期刊:
影响因子:
5.7
通讯作者:
Schulten, Klaus
中科院分区:
文献类型:
--
作者:
Chan, Kwok-Yan;Gumbart, James;McGreevy, Ryan;Watermeyer, Jean M.;Sewell, B. Trevor;Schulten, Klaus
Many large biological macromolecules have inherent structural symmetry, being composed of a few distinct subunits, repeated in a symmetric array. These complexes are often not amenable to traditional high-resolution structural determination methods, but can be imaged in functionally relevant states using cryo-electron microscopy (cryo-EM). A number of methods for fitting atomic-scale structures into cryo-EM maps have been developed, including the molecular dynamics flexible fitting (MDFF) method. However, quality and resolution of the cryo-EM map are the major determinants of a method’s success. In order to incorporate knowledge of structural symmetry into the fitting procedure, we developed the symmetry-restrained MDFF method. The new method adds to the cryo-EM map-derived potential further restraints on the allowed conformations of a complex during fitting, thereby improving the quality of the resultant structure. The benefit of using symmetry-based restraints during fitting, particularly for medium to low-resolution data, is demonstrated for three different systems.
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影响因子:
56.9
作者:
Doyle, DA;Cabral, JM;MacKinnon, R
通讯作者:
MacKinnon, R
影响因子:
4.8
作者:
Pereira, Jose H.;Ralston, Corie Y.;Adams, Paul D.
通讯作者:
Adams, Paul D.
DOI:
10.1073/pnas.0402525101
发表时间:
2004-05-25
影响因子:
11.1
作者:
Hoang, TX;Trovato, A;Maritan, A
通讯作者:
Maritan, A
影响因子:
5.7
作者:
Schroeder, Gunnar F.;Brunger, Axel T.;Levitt, Michael
通讯作者:
Levitt, Michael
影响因子:
56.9
作者:
FRAUENFELDER, H;SLIGAR, SG;WOLYNES, PG
通讯作者:
WOLYNES, PG