期刊
JOURNAL OF BIOLOGICAL CHEMISTRY
卷 278, 期 20, 页码 18544-18549出版社
AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
DOI: 10.1074/jbc.M212852200
关键词
-
The chloroplast ATP-synthase catalyzes ATP synthesis coupled to transmembrane proton transport. The enzyme consists of two parts, a membrane-embedded F-0 part and an extrinsic F-1 part, which are linked by two connectors. One of these rotates during catalysis and the other remains static. Although the atomic structures of various sub-complexes and individual subunits have been reported, only limited structural information on the complex, as a whole, is available. In particular, information on the static connector is lacking. We contribute a three-dimensional map at about 20-Angstrom resolution, derived from electron cryomicroscopy of enzymes embedded in vitrified buffer followed by single particle image analysis. In the three-dimensional map both connectors, between the F-1 part and the F-0 part, are clearly visible. The static connector is tightly attached to an alpha subunit and faces the side of the neighboring beta subunit. The three-dimensional map provides a scaffold for fitting in the known atomic structures of various subunits and sub-complexes, and suggests that the oxidized, non-activated ATP-synthase from chloroplasts adopts a unique resting position.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据