Methanethiol oxidase

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methanethiol oxidase

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In enzymology, a methanethiol oxidase (EC 1.8.3.4) is an enzyme that catalyzes the chemical reaction

methanethiol + O₂ + H₂O

\rightleftharpoons

formaldehyde + hydrogen sulfide + H₂O₂

The 3 substrates of this enzyme are methanethiol, O₂, and H₂O, whereas its 3 products are formaldehyde, hydrogen sulfide, and H₂O₂.^[1]

This enzyme belongs to the family of oxidoreductases, specifically those acting on a sulfur group of donors with oxygen as acceptor. The systematic name of this enzyme class is methanethiol:oxygen oxidoreductase. Other names in common use include methylmercaptan oxidase, methyl mercaptan oxidase, (MM)-oxidase, and MT-oxidase.

References

^ Suylen GM, Large PJ, Van Dijken J, Kuenen JG (1987). "Methyl Mercaptan Oxidase, a Key Enzyme in the Metabolism of Methylated Sulphur Compounds by Hyphomicrobium EG". Microbiology. 133 (11): 2989–2997. doi:10.1099/00221287-133-11-2989.

v t e Oxidoreductases: sulfur oxidoreductases (EC 1.8)
1.8.1: NAD or NADP	Dihydrolipoamide dehydrogenase Glutathione reductase Thioredoxin reductase
1.8.2: cytochrome	Sulfite dehydrogenase Thiosulfate dehydrogenase Flavocytochrome c sulfide dehydrogenase
1.8.3: oxygen	Sulfite oxidase
1.8.4: disulfide	Glutathione—homocystine transhydrogenase
1.8.5: quinone	Glutathione dehydrogenase (ascorbate)
1.8.98: Other, known	CoB—CoM heterodisulfide reductase
1.8.99: Other	Sulfite reductase

v t e Enzymes
Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Diffusion-limited enzyme Cofactor Enzyme catalysis
Regulation	Allosteric regulation Cooperativity Enzyme inhibitor Enzyme activator
Classification	EC number Enzyme superfamily Enzyme family List of enzymes
Kinetics	Enzyme kinetics Eadie–Hofstee diagram Hanes–Woolf plot Lineweaver–Burk plot Michaelis–Menten kinetics
Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list) EC7 Translocases (list)

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