THE REACTION OF EDTA WITH METALLOTHIONEIN AND ITS SEPARATE CLUSTERS: COMPLEX KINETIC BEHAVIOR WITH NOVEL PROTEIN CONCENTRATION DEPENDENCE
EDTA Reaction with Metallothionein and Its Clusters
publication
Author Information
Author(s): Amalia Munoz, David H. Petering, Gan Tong, C. Frank Shaw III
Primary Institution: Department of Chemistry, University of Wisconsin-Milwaukee
Hypothesis
Differences in the sequence-specific Cd-thiolate connections between lobster and mammalian metallothioneins alter the chemistry of the proteins.
Conclusion
Mammalian metallothionein reacts with EDTA in a biphasic manner, indicating complex kinetic behavior.
Supporting Evidence
- Mammalian metallothionein binds cadmium ions in two clusters.
- The reaction with EDTA shows biphasic kinetics.
- Cadmium removal from the e-domain proceeds through a partially Cd-depleted intermediate.
Takeaway
This study looks at how a protein that helps detoxify metals reacts with a chemical called EDTA, showing that the reaction is more complicated than expected.
Methodology
The study involved comparing the reactions of mammalian metallothionein with EDTA and examining the kinetics of isolated protein domains.
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