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Related Experiment Videos

Interactions in cytochrome oxidase: functions and structure.

J A Freedman, S H Chan

    Journal of Bioenergetics and Biomembranes
    |April 1, 1984
    PubMed
    Summary

    This review details mitochondrial cytochrome c oxidase functions and structure, focusing on interactions and energy transduction roles. It presents a model for how protein conformation links these key functions.

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    Area of Science:

    • Biochemistry
    • Molecular Biology
    • Cellular Respiration

    Background:

    • Mitochondrial cytochrome c oxidase is a complex, multi-subunit enzyme essential for cellular respiration.
    • Previous comprehensive reviews, such as Wikström, Krab, and Saraste (1981), established foundational knowledge.
    • This review covers developments in the field up to early 1983, expanding upon existing literature.

    Purpose of the Study:

    • To provide an updated overview of mitochondrial cytochrome c oxidase.
    • To highlight interactions and functions not extensively covered in prior monographs.
    • To propose a model integrating the enzyme's structure and function.

    Main Methods:

    • Literature review of scientific publications up to early 1983.
    • Analysis of enzyme structure, including subunit composition, origin, and interactions.
    • Examination of enzyme functions: electron transport and energy transduction.

    Main Results:

    • Detailed description of cytochrome c oxidase's dual roles: electron transport and energy transduction.
    • Comprehensive analysis of the enzyme's protein structure, subunit stoichiometry, and biosynthetic pathways.
    • Exploration of intra-enzyme and enzyme-membrane interactions.

    Conclusions:

    • Mitochondrial cytochrome c oxidase is a dynamic enzyme with intricate structure-function relationships.
    • Protein conformation is proposed as a central element mediating the enzyme's primary functions.
    • This review consolidates recent advancements in understanding this critical respiratory enzyme.

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