Fragment-based phase extension for three-dimensional structure determination of membrane proteins by electron crystallography.
Fragment-based phase extension for three-dimensional structure determination of membrane proteins by electron crystallography.
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DOI:
10.1016/j.str.2011.04.008
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发表时间:
2011-07-13
期刊:
影响因子:
5.7
通讯作者:
Gonen, Tamir
中科院分区:
文献类型:
--
作者:
Wisedchaisri, Goragot;Gonen, Tamir
In electron crystallography membrane protein structure is determined from two-dimensional crystals where the protein is embedded in a membrane. Once large and well-ordered 2D crystals are grown one of the bottlenecks in electron crystallography is the collection of image data to directly provide experimental phases to high resolution. Here we describe a new approach to bypass this bottleneck, eliminating the need for high-resolution imaging. We use the strengths of electron crystallography in rapidly obtaining accurate experimental phase information from low-resolution images and accurate high-resolution amplitude information from electron diffraction. The low-resolution experimental phases were used for the placement of α-helix fragments and extended to high resolution using phases from the fragments. Phases were further improved by density modifications followed by fragment expansion and structure refinement against the high-resolution diffraction data. Using this approach, structures of three membrane proteins were determined rapidly and accurately to atomic resolution without high-resolution image data.
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影响因子:
64.8
作者:
Gonen, T;Sliz, P;Walz, T
通讯作者:
Walz, T
DOI:
10.1073/pnas.080064697
发表时间:
2000-04-25
影响因子:
11.1
作者:
Kunji, ERS;von Gronau, S;Henderson, R
通讯作者:
Henderson, R
影响因子:
64.8
作者:
LIDDINGTON, RC;YAN, Y;HARRISON, SC
通讯作者:
HARRISON, SC
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
64.8
作者:
Kimura, Y;Vassylyev, DG;Fujiyoshi, Y
通讯作者:
Fujiyoshi, Y