期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 98, 期 9, 页码 4966-4971出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.081424898
关键词
-
资金
- NIGMS NIH HHS [R37 GM023105, R01 GM023105, GM23105] Funding Source: Medline
The stoichiometry of c subunits in the H+-transporting F-o rotary motor of ATP synthase is uncertain, the most recent suggestions varying from 10 to 14, The stoichiometry will determine the number of H+ transported per ATP synthesized and will directly relate to the P/O ratio of oxidative phosphorylation, The experiments described here show that the number of c subunits in functional complexes of FoF1 ATP synthase from Escherichia coli can be manipulated, but that the preferred number is 10, Mixtures of genetically fused cysteine-substituted trimers (c(3)) and tetramers (c(4)) of subunit c were coexpressed and the c subunits crosslinked in the plasma membrane. Prominent products corresponding to oligomers of c(7) and c(10) were observed in the membrane and purified FoF1 complex, indicating that the c(10) oligomer formed naturally. Oligomers larger than c(10) were also observed in the membrane fraction of cells expressing c(3) or c(4) individually, or in cells coexpressing c(3) and c(4) together, but these larger oligomers did not copurify with the functional FoF1 complex and were concluded to be aberrant products of assembly in the membrane.
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