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Related Experiment Videos

Coimmobilized multienzymes: an in vitro model for cellular processes.

M De Luca, L J Kricka

    Archives of Biochemistry and Biophysics
    |October 1, 1983
    PubMed
    Summary

    Immobilized multienzyme systems on Sepharose are catalytically active. These systems serve as models for studying metabolic processes and producing alcohol from glucose or 3-phosphoglycerate.

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    Area of Science:

    • Biochemistry
    • Biotechnology
    • Enzyme Engineering

    Background:

    • Multienzyme systems are crucial for metabolic pathways.
    • Enzyme immobilization enhances stability and reusability.
    • Monitoring metabolic flux often requires sensitive detection methods.

    Purpose of the Study:

    • To coimmobilize two distinct multienzyme systems onto Sepharose.
    • To demonstrate the catalytic activity and potential applications of these immobilized systems.
    • To establish models for comparative studies of cellular metabolic processes.

    Main Methods:

    • Coimmobilization of five enzymes for glucose 1-phosphate to 1,3-diphosphoglycerate conversion, coupled with NADH-monitoring enzymes (NADH:FMN oxidoreductase-luciferase).
    • Coimmobilization of eleven enzymes for glucose to alcohol conversion.
    • Assessing catalytic activity and product formation of the immobilized systems.

    Main Results:

    • Both immobilized multienzyme systems exhibited catalytic activity.
    • The glucose to alcohol conversion system produced 4068 nmol of alcohol per gram of Sepharose-enzymes in 4 h from glucose.
    • Using 3-phosphoglycerate as a substrate, the immobilized system yielded 6552 nmol of alcohol.

    Conclusions:

    • Coimmobilized multienzyme systems on Sepharose are catalytically active and stable.
    • These systems can be utilized for efficient bioconversion processes, such as alcohol production.
    • The developed immobilized multienzyme systems serve as valuable models for investigating complex metabolic pathways and enzyme kinetics in a controlled environment.

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