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Related Experiment Videos

[Phosphorylation in acid shocked chloroplasts].

L A Bliumenfel'd, M G Gol'dfel'd, L G Dmitrovskiĭ

    Biofizika
    |May 1, 1978
    PubMed
    Summary

    Acidification of Vicia faba chloroplasts triggers ADP phosphorylation due to coupling factor conformational changes. Heat pretreatment effectively inhibits this acid-induced phosphorylation process in plant chloroplasts.

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    [Kinetics of electron transfer in macromolecules].

    Biofizika·1992

    Area of Science:

    • Plant biochemistry
    • Chloroplast function
    • Enzyme kinetics

    Context:

    • Investigating the biochemical processes within plant chloroplasts.
    • Understanding the role of coupling factor in energy transduction.
    • Exploring the impact of environmental stressors on chloroplast activity.

    Purpose:

    • To investigate ADP phosphorylation in Vicia faba chloroplasts under rapid acidification.
    • To elucidate the mechanism behind acid-induced ADP phosphorylation.
    • To determine the effect of heat pretreatment on this phenomenon.

    Summary:

    • ADP phosphorylation was observed in Vicia faba chloroplasts upon sharp acidification (pH 8 to 1.6).
    • This phosphorylation is attributed to the conformational relaxation of the coupling factor, leading to acid-induced denaturation.
    • Heat pretreatment was found to inhibit this acid-induced ADP phosphorylation effect.

    Impact:

    • Provides insights into chloroplast energy transduction mechanisms.
    • Highlights the sensitivity of coupling factor to pH changes and denaturation.
    • Suggests potential strategies for modulating chloroplast activity through thermal or chemical treatments.

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