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Thiol exchange reactions involving selenotrisulfides
T Nakagawa1, E Aoyama, N Kobayashi
1Faculty of Pharmaceutical Sciences, Kyoto University, Japan.
Biochemical and Biophysical Research Communications
|February 15, 1988
Summary
This study documents in vitro thiol exchange reactions involving selenotrisulfides, revealing how asymmetric and symmetric forms interact. These reactions provide insights into selenium metabolism and intake within living organisms.
Area of Science:
- Biochemistry
- Selenium Chemistry
- Analytical Chemistry
Background:
- Selenotrisulfides are selenium-containing compounds with potential biological relevance.
- Thiol exchange reactions are fundamental in biological systems.
- Understanding selenium metabolism is crucial for human health.
Purpose of the Study:
- To document in vitro thiol exchange reactions involving selenotrisulfides.
- To investigate the formation pathways of asymmetric and symmetric selenotrisulfides.
- To explore the implications of these reactions for selenium metabolism in vivo.
Main Methods:
- High-performance liquid chromatography (HPLC) analysis of reaction solutions.
- Controlled in vitro reactions involving thiols (penicillamine, cysteine, glutathione) and selenite.
- Synthesis and characterization of symmetric and asymmetric selenotrisulfides.
Main Results:
- Demonstrated the occurrence of in vitro thiol exchange reactions with selenotrisulfides.
- Identified pathways for the formation of asymmetric selenotrisulfides from thiols and selenite, or via reactions with symmetric selenotrisulfides.
- Showed that asymmetric selenotrisulfides can further react with thiols to form new symmetric selenotrisulfides.
Conclusions:
- Thiol exchange reactions involving selenotrisulfides are well-defined in vitro.
- These reactions provide a mechanistic basis for understanding selenium biochemistry.
- The findings offer significant insights into the intake and metabolism of selenium in vivo.