Electron‐Microscopic Demonstration of a “Head and Stalk” Structure of the Leaf Vacuolar ATPase in Mesembryanthemum crystallinum L.
Electron‐Microscopic Demonstration of a “Head and Stalk” Structure of the Leaf Vacuolar ATPase in Mesembryanthemum crystallinum L.
复制标题
电子显微镜展示 Mesembryanthemum crystallinum L 叶液泡 ATP 酶的“头和茎”结构。
DOI:
--
复制
发表时间:
1991
期刊:
影响因子:
--
通讯作者:
U. Lüttge
中科院分区:
文献类型:
--
作者:
R. Klink;U. Lüttge
The structure of the vacuolar ATPase from mesophyll tonoplasts of Mesembryanthemum crystallinum has been studied by electron microscopy using negatively stained specimens of membrane-bound and detergent-solubilized ATPase molecules. We observed a high density of particles on the surface of tonoplast vesicles and “head and stalk” structures on the edge of the membrane, similar to the F0F1-ATPases of mitochondrial and chloroplast membranes. The staining conditions, which are often critical for such small objects, were improved by using methylamine tungstate as negative stain for the membrane-bound ATPase. Compared to other staining solutions generally applied, dissociation of the F1-like enzyme complex from the membrane was best prevented and structural damage of the vesicles was least observed with methylamine tungstate.
In freeze-fracture electron microscopy of tonoplast vesicles, where dissociation never occurs since no detergent is used, we also observed “head and stalk” structures on the edge of the membranes, beside many particles on the fracture faces.
The detergent-solubilized ATPase forms string-like structures, caused by the aggregation of the hydrophobic membrane-embedded F0-like part of the enzyme. After negative staining the F1-like enzyme complex is arranged alternately along both sides of the string and connected by a narrow stalk.
登录
查看更多内容
DOI:
--
发表时间:
1987
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Sun,SZ;Xie,XS;Stone,DK
通讯作者:
Stone,DK
DOI:
--
发表时间:
1990
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Adachi,I;Puopolo,K;Marquez-Sterling,N;Arai,H;Forgac,M
通讯作者:
Forgac,M
DOI:
--
发表时间:
1989
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Bowman,BJ;Dschida,WJ;Harris,T;Bowman,EJ
通讯作者:
Bowman,EJ
影响因子:
--
作者:
E. J. Bowman;B. Bowman
通讯作者:
E. J. Bowman;B. Bowman
DOI:
--
发表时间:
1987
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Arai,H;Berne,M;Forgac,M
通讯作者:
Forgac,M