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Updated: Jul 9, 2026

High-Resolution Complexome Profiling by Cryoslicing BN-MS Analysis
Published on: October 15, 2019
A structural perspective on mechanism and function of the cytochrome bc (1) complex
Carola Hunte1, Sozanne Solmaz, Hildur Palsdóttir
1Dept. Molecular Membrane Biology, Max Planck Institute of Biophysics, 60438, Frankfurt, Germany. carola.hunte@mpibp-frankfurt.mpg.de
Abstract:
The cytochrome bc (1) complex is a fundamental component of the energy conversion machinery of respiratory and photosynthetic electron transfer chains. The multi-subunit membrane protein complex couples electron transfer from hydroquinone to cytochrome c to the translocation of protons across the membrane, thereby substantially contributing to the proton motive force that is used for ATP synthesis. Considerable progress has been made with structural and functional studies towards complete elucidation of the Q cycle mechanism, which was originally proposed by Mitchell 30 years ago. Yet, open questions regarding key steps of the mechanism still remain. The role of the complex as a major source of reactive oxygen species and its implication in pathophysiological conditions has recently gained interest.
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