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Literature summary for 1.8.3.4 extracted from

  • Suylen, G.M.H.; Large, P.J.; van Dijken, J.P.; Kuenen, J.G.
    Methyl mercaptan oxidase, a key enzyme in the metabolism of methylated sulphur compounds by Hyphomicrobium EG (1987), J. Gen. Microbiol., 133, 2989-2997.
No PubMed abstract available

Inhibitors

Inhibitors Comment Organism Structure
(NH4)2SO4
-
Hyphomicrobium sp.
cyanide
-
Hyphomicrobium sp.
ethyl mercaptan
-
Hyphomicrobium sp.
methanethiol above 0.014 mM Hyphomicrobium sp.
methylamine
-
Hyphomicrobium sp.
NH4+
-
Hyphomicrobium sp.
NH4Cl
-
Hyphomicrobium sp.
Sulfide non-competitive inhibition of methyl mercaptan oxidation Hyphomicrobium sp.

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.005 0.01 methanethiol
-
Hyphomicrobium sp.
0.018
-
ethyl mercaptan
-
Hyphomicrobium sp.
0.06
-
Sulfide
-
Hyphomicrobium sp.

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
40000 50000 gel filtration Hyphomicrobium sp.
49000
-
1 * 49000, SDS-PAGE Hyphomicrobium sp.

Organism

Organism UniProt Comment Textmining
Hyphomicrobium sp.
-
-
-
Hyphomicrobium sp. EG
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Hyphomicrobium sp.

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
2.13
-
-
Hyphomicrobium sp.

Storage Stability

Storage Stability Organism
-20°C, stable for months Hyphomicrobium sp.

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
ethyl mercaptan + O2 + H2O
-
Hyphomicrobium sp. acetaldehyde + H2S + H2O2
-
?
ethyl mercaptan + O2 + H2O
-
Hyphomicrobium sp. EG acetaldehyde + H2S + H2O2
-
?
methanethiol + O2 + H2O
-
Hyphomicrobium sp. formaldehyde + H2S + H2O2
-
?
methanethiol + O2 + H2O
-
Hyphomicrobium sp. EG formaldehyde + H2S + H2O2
-
?
sulfide + O2
-
Hyphomicrobium sp. sulfur + H2O2
-
?
sulfide + O2
-
Hyphomicrobium sp. EG sulfur + H2O2
-
?

Subunits

Subunits Comment Organism
monomer 1 * 49000, SDS-PAGE Hyphomicrobium sp.

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
50
-
10 min, stable Hyphomicrobium sp.
65
-
10 min, complete loss of activity Hyphomicrobium sp.

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8.2
-
-
Hyphomicrobium sp.

Ki Value [mM]

Ki Value [mM] Ki Value maximum [mM] Inhibitor Comment Organism Structure
0.04
-
cyanide
-
Hyphomicrobium sp.
0.042
-
methanethiol
-
Hyphomicrobium sp.
0.09
-
Sulfide
-
Hyphomicrobium sp.
1.4
-
methylamine
-
Hyphomicrobium sp.
4
-
NH4+
-
Hyphomicrobium sp.