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Related Experiment Videos

Caenorhabditis elegans expresses a functional phytochelatin synthase.

S Clemens1, J I Schroeder, T Degenkolb

  • 1Leibniz Institute of Plant Biochemistry, Halle, Germany. sclemens@ipb-halle.de

European Journal of Biochemistry
|July 4, 2001
PubMed
Summary

Plants and fungi use phytochelatins to manage toxic metals. This study reveals that the nematode Caenorhabditis elegans also expresses a functional phytochelatin synthase gene, suggesting a role in animal metal homeostasis.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Toxicology

Background:

  • Phytochelatins are metal-binding peptides derived from glutathione, crucial for plant detoxification of toxic metals.
  • Phytochelatin synthases (PCS) genes have been identified in plants and fungi, but their presence in animals was unknown.
  • A homologous gene was unexpectedly found in the Caenorhabditis elegans genome.

Purpose of the Study:

  • To investigate the presence and function of a phytochelatin synthase gene in Caenorhabditis elegans.
  • To determine if the identified gene confers phytochelatin synthesis activity and metal tolerance.

Main Methods:

  • Bioinformatic analysis to identify a homologous PCS gene in C. elegans.
  • Functional complementation assay using a PCS knock-out strain of the yeast Schizosaccharomyces pombe.

Related Experiment Videos

  • Assessing cadmium (Cd2+) sensitivity and phytochelatin synthase activity in yeast cells expressing the C. elegans gene.

    • Main Results:

    • The C. elegans gene (CePCS) codes for a functional phytochelatin synthase.
    • Expression of CePCS in a S. pombe PCS knock-out strain restored cadmium tolerance.
    • The complemented yeast cells exhibited significant phytochelatin synthase activity.

    Conclusions:

    • Caenorhabditis elegans possesses a functional phytochelatin synthase, indicating its role in metal detoxification.
    • Phytochelatins may be involved in metal homeostasis in certain animal species.
    • This finding expands the known biological roles of phytochelatins beyond plants and fungi.