Reference: Braun HP, et al. (2009) Chapter 10 Purification of the cytochrome C reductase/cytochrome C oxidase super complex of yeast mitochondria. Methods Enzymol 456:183-90

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Abstract


The protein complexes of the respiratory chain interact by forming large protein particles called respiratory supercomplexes or "respirasomes". Biochemical characterization of these particles proved to be difficult because of their instability. Here we describe a strategy to isolate and characterize the cytochrome c reductase/cytochrome c oxidase supercomplex of yeast, also termed the III + IV supercomplex, which is based on lactate cultivation of yeast, gentle isolation of mitochondria, membrane solubilization by digitonin, sucrose gradient ultracentrifugation, and native gel electrophoresis. The procedure yields pure forms of two varieties of the III + IV supercomplex composed of dimeric complex III and one or two copies of monomeric complex IV. Supercomplex preparations can be used for physiological or structural investigations.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't
Authors
Braun HP, Sunderhaus S, Boekema EJ, Kouril R
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