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Related Experiment Videos

Chromate reduction by rabbit liver aldehyde oxidase.

R B Banks, R T Cooke

    Biochemical and Biophysical Research Communications
    |May 29, 1986
    PubMed
    Summary

    Rabbit liver aldehyde oxidase reduces chromate when supplied with electron donors like 1-methylnicotinamide. This enzymatic chromate reduction requires both the enzyme and a substrate, indicating aldehyde oxidase

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    Area of Science:

    • Biochemistry
    • Enzymology
    • Toxicology

    Background:

    • Chromate is a toxic environmental pollutant.
    • Enzymatic pathways for chromate reduction are not fully understood.
    • Aldehyde oxidase is a key enzyme in xenobiotic metabolism.

    Purpose of the Study:

    • To investigate the role of rabbit liver aldehyde oxidase in chromate reduction.
    • To identify potential electron donors supporting this enzymatic reaction.

    Main Methods:

    • Partially purified rabbit liver aldehyde oxidase was used.
    • Chromate reduction was monitored in the presence of 1-methylnicotinamide and other potential substrates.
    • Enzyme inhibitors specific to aldehyde oxidase and xanthine oxidase were employed.

    Main Results:

    • Aldehyde oxidase catalyzed the reduction of chromate.
    • 1-methylnicotinamide and other aldehyde oxidase substrates supported chromate reduction.
    • The reaction required both the enzyme and an electron donor substrate.
    • Inhibitors of aldehyde oxidase, but not xanthine oxidase, affected the reduction rate.

    Conclusions:

    • Rabbit liver aldehyde oxidase is involved in the enzymatic reduction of chromate.
    • The findings suggest a novel detoxification pathway for chromate in the liver.

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