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
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冷冻电镜和螺旋图像重建乙酰胆碱受体的三维结构

DOI:
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发表时间:
1990
影响因子:
7.8
通讯作者:
N. Unwin
N. Unwin
中科院分区:
生物学1区
文献类型:
--
作者:
C. Toyoshima;N. Unwin

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长管状囊泡已经从分离的电鳐突触后膜中生长出来,其中受体在囊泡表面呈螺旋状排列。这些管的结构进行了分析,冷冻电子显微镜的标本嵌入在薄膜的冰,结合螺旋图像重建。完整的数据集,从管属于几个螺旋家庭已获得的分辨率为17埃在所有方向。对一项初步研究(Toyoshima,C.,和N.安温1988.自然(伦敦)。336:247-250),中心离子通道在整个分子中具有几乎恒定的直径,除了延伸穿过脂质双层的疏水部分的部分,其中孔太小而不能分辨。然而,贯穿孔的伪五重轴上的密度在双层的细胞质半部分中始终最高,这表明门位于该区域。每个亚基遵循的路径已经在整个受体的长度上被确定。两个alpha子单元遵循相同的路径。所有亚基具有相似的特征,其在相对于膜的相同水平上改变特征。
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.
膜结合乙酰胆碱受体的晶体阵列。
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
烟碱乙酰胆碱受体的三维结构和主要相关 43-kD 细胞骨架蛋白的位置,通过低剂量电子显微镜和 12.5 A 的 X 射线衍射在 22 A 确定。
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
与乙酰胆碱受体结合的眼镜蛇α毒素分子之间的荧光能量转移。
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
烟碱乙酰胆碱受体的跨膜形貌:免疫化学测试与基于疏水性特征的理论预测相矛盾。
DOI: 10.1021/bi00357a052
发表时间: 1986
期刊: Biochemistry
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