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Methionine sulfoxide in the resilium protein of surf clams
Journal of Biochemistry
|June 1, 1981
Abstract:
A high content of methionine sulfoxide was observed in the resiliums (internal hingeligaments) of surf clams. As no isolation procedure which might cause the oxidation of methionine to methionine sulfoxide was involved and the hydrolysis was carried out in vacuo, it is the first solid evidence for the presence of methionine sulfoxide as a constituent of natural protein.
Insights
Methionine sulfoxide, an oxidized amino acid, was found in surf clam resiliums. This discovery provides the first evidence of methionine sulfoxide naturally occurring in proteins.
Area of Science:
- Biochemistry
- Marine Biology
- Protein Chemistry
Background:
- The resilium is a proteinaceous structure providing elasticity to bivalve shells.
- Oxidation of methionine residues can alter protein structure and function.
Purpose of the Study:
- To investigate the biochemical composition of surf clam resilium.
- To determine the presence and significance of oxidized amino acids in natural proteins.
Main Methods:
- Analysis of surf clam resilium (internal hinge ligament) composition.
- Hydrolysis of resilium proteins under vacuum conditions to prevent artificial oxidation.
Main Results:
- A high concentration of methionine sulfoxide was detected in the resilium.
- The presence of methionine sulfoxide was confirmed without artificial oxidation during sample processing.
Conclusions:
- This study presents the first definitive evidence for methionine sulfoxide as a native component of natural proteins.
- The findings suggest that methionine sulfoxide plays a role in the structural integrity or function of resilium proteins.