Mercaptan-capturing properties of mushrooms

Area of Science:

• Biochemistry
• Mycology
• Food Science

Background:

• Methyl mercaptan (MeSH) is a volatile sulfur compound responsible for unpleasant odors.
• Mushrooms are known to contain various enzymes and phenolic compounds.
• Investigating natural compounds for odor mitigation is of significant interest.

Purpose of the Study:

• To identify mushroom species with high methyl mercaptan (MeSH) capturing abilities.
• To elucidate the biochemical mechanisms underlying MeSH capture by mushrooms.
• To explore the potential of mushroom-derived compounds for MeSH remediation.

Main Methods:

• Screening of 33 mushroom species for MeSH capturing capacity.
• Preparation of acetone powders from mushrooms to isolate enzymes and compounds.
• Biochemical assays involving phenolic compounds (e.g., tyrosine, DOPA) and tyrosinase.
• Isolation and identification of reaction products using chromatographic and spectroscopic techniques.

Main Results:

• Eleven mushroom species, including Agaricus bisporus and Morchella esculenta, demonstrated significant MeSH capture.
• Acetone powders containing polyphenol oxidases, combined with phenolic compounds, effectively captured MeSH.
• 2,5-Bis(methylthio)-DOPA was identified as a reaction product of tyrosine, MeSH, and tyrosinase.
• Acetone powders from fruits and vegetables also facilitated MeSH binding to diphenolic compounds.

Conclusions:

• Specific mushroom species possess potent methyl mercaptan (MeSH) capturing properties.
• Polyphenol oxidases and associated phenolic compounds in mushrooms are key to MeSH binding.
• These findings suggest a biochemical basis for using mushroom-derived materials in odor control technologies.