Three-dimensional structure of the acetylcholine receptor by cryoelectron microscopy and helical image reconstruction
Three-dimensional structure of the acetylcholine receptor by cryoelectron microscopy and helical image reconstruction
复制标题
冷冻电镜和螺旋图像重建乙酰胆碱受体的三维结构
作者:
C. Toyoshima;N. Unwin
Long tubular vesicles have been grown from isolated Torpedo postsynaptic membranes, in which the receptors are arranged helically on the vesicle surface. The structures of these tubes have been analyzed by cryoelectron microscopy of specimens embedded in thin films of ice, combined with helical image reconstruction. Complete data sets from tubes belonging to several helical families have been obtained to a resolution of 17 A in all directions. Confirming a preliminary study (Toyoshima, C., and N. Unwin. 1988. Nature (Lond.). 336:247-250), the central ion channel has an almost constant diameter throughout the molecule except for the portion extending through the hydrophobic part of the lipid bilayer, where the pore is too small to be resolved. However, the density on the pseudo fivefold axis running through the pore is consistently highest in the cytoplasmic half of the bilayer, suggesting the gate is located in that region. The path followed by each subunit has been identified throughout the length of the receptor. The two alpha subunits follow equivalent paths. All subunits have similar features which change in character at the same level relative to the membrane.
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DOI:
10.1073/pnas.78.6.3678
发表时间:
1981
影响因子:
11.1
作者:
Kistler,J;Stroud,RM
通讯作者:
Stroud,RM
DOI:
10.1083/jcb.109.2.755
发表时间:
1989
期刊:
The Journal of cell biology
影响因子:
--
作者:
Mitra,AK;McCarthy,MP;Stroud,RM
通讯作者:
Stroud,RM
DOI:
--
发表时间:
1984
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Johnson,DA;Voet,JG;Taylor,P
通讯作者:
Taylor,P
影响因子:
2.9
作者:
Ratnam,M;Nguyen,DL;Rivier,J;Sargent,PB;Lindstrom,J
通讯作者:
Lindstrom,J
DOI:
10.1073/pnas.81.1.155
发表时间:
1984-01-01
期刊:
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子:
--
作者:
FINERMOORE, J;STROUD, RM
通讯作者:
STROUD, RM