The cytochrome bc1 and cytochrome c oxidase complexes associate to form a single supracomplex in yeast mitochondria

被引:210
作者
Cruciat, CM
Brunner, S
Baumann, F
Neupert, W
Stuart, RA
机构
[1] Marquette Univ, Dept Biol, Milwaukee, WI 53051 USA
[2] Univ Munich, Inst Physiol Chem, D-80336 Munich, Germany
关键词
D O I
10.1074/jbc.M001901200
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The mitochondrial electron transport chain complexes are large multisubunit complexes embedded in the inner membrane. We report here that in the yeast Saccharomyces cerevisiae, the cytochrome be, and cytochrome c oxidase complexes co-exist as a larger complex of similar to 1000 kDa in the mitochondrial membrane. Following solubilization with a mild detergent, the cytochrome bc(1)-cytochrome c oxidase complex remains stable. It was analyzed using the techniques of gel filtration and blue native-polyacrylamide gel electrophoresis. Direct physical. association of subunits of the cytochrome be, complex with those of the cytochrome c oxidase complex was verified by co-immunoprecipitation analysis. Our data indicate that the cytochrome be, complex is exclusively in association with the cytochrome c oxidase complex in yeast mitochondria. We term this complex the cytochrome bc(1)-cytochrome c oxidase supracomplex.
引用
收藏
页码:18093 / 18098
页数:6
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