Information on EC 1.14.13.25 - methane monooxygenase (soluble)

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The enzyme appears in viruses and cellular organisms

EC NUMBER
COMMENTARY hide
1.14.13.25
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RECOMMENDED NAME
GeneOntology No.
methane monooxygenase (soluble)
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
methane + NAD(P)H + H+ + O2 = methanol + NAD(P)+ + H2O
show the reaction diagram
REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
oxidation
redox reaction
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reduction
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PATHWAY
BRENDA Link
KEGG Link
MetaCyc Link
methane oxidation to methanol I
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nitrite-dependent anaerobic methane oxidation
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Methane metabolism
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Metabolic pathways
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Microbial metabolism in diverse environments
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SYSTEMATIC NAME
IUBMB Comments
methane,NAD(P)H:oxygen oxidoreductase (hydroxylating)
The enzyme is soluble, in contrast to the particulate enzyme, EC 1.14.18.3. Broad specificity; many alkanes can be hydroxylated, and alkenes are converted into the corresponding epoxides; CO is oxidized to CO2, ammonia is oxidized to hydroxylamine, and some aromatic compounds and cyclic alkanes can also be hydroxylated, but more slowly.
CAS REGISTRY NUMBER
COMMENTARY hide
51961-97-8
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ORGANISM
COMMENTARY hide
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
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Automatic Mining of ENzyme DAta
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Automatic Mining of ENzyme DAta
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Automatic Mining of ENzyme DAta
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Automatic Mining of ENzyme DAta
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Automatic Mining of ENzyme DAta
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Automatic Mining of ENzyme DAta
heterotrophic bacterium
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Automatic Mining of ENzyme DAta
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Automatic Mining of ENzyme DAta
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Automatic Mining of ENzyme DAta
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Automatic Mining of ENzyme DAta
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Automatic Mining of ENzyme DAta
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Automatic Mining of ENzyme DAta
; HD6T
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Manually annotated by BRENDA team
Methylocystis sp.
Methylocystis sp. WI 14
strain WI 14
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Manually annotated by BRENDA team
Methyloferula stellata gen. nov., sp. nov.
gene mmoX
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Manually annotated by BRENDA team
alpha-subunit, strain LAY; isolated from acidic forest soil near Marburg, Germany, gene mmoX
UniProt
Manually annotated by BRENDA team
alpha-subunit, strain SOP9; isolated from an acidic peat soil sampled at a depth of 10 to 20 cm of the Sphagnum peat bog Bakchar, West Siberia, Russia, gene mmoX
UniProt
Manually annotated by BRENDA team
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Automatic Mining of ENzyme DAta
strain 5
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Manually annotated by BRENDA team
strain IMV 3011
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Manually annotated by BRENDA team
methylotrophic bacterium
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Automatic Mining of ENzyme DAta
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Automatic Mining of ENzyme DAta
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Automatic Mining of ENzyme DAta
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Automatic Mining of ENzyme DAta
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Automatic Mining of ENzyme DAta
plant
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Automatic Mining of ENzyme DAta
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Automatic Mining of ENzyme DAta
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Automatic Mining of ENzyme DAta
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Automatic Mining of ENzyme DAta
synthetic construct
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Manually annotated by BRENDA team
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Automatic Mining of ENzyme DAta
GENERAL INFORMATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
physiological function
SUBSTRATE
PRODUCT                       
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
1,1,2,2-tetramethylcyclopropane + NADH + O2
?
show the reaction diagram
-
-
-
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?
1-butene + NAD(P)H + O2
1,2-epoxybutane + NAD(P)+ + H2O
show the reaction diagram
2,3-dimethylpentane + NAD(P)H + O2
3,4-dimethylpentan-2-ol + NAD(P)+ + H2O
show the reaction diagram
-
-
-
?
2-methylpropane + NAD(P)H + O2
2-methylpropan-2-ol + 2-methylpropan-1-ol + NAD(P)+ + H2O
show the reaction diagram
-
-
-
?
adamantane + NAD(P)H + O2
1-adamantanol + 2-adamantanol + NAD(P)+ + H2O
show the reaction diagram
-
-
-
?
ammonia + NAD(P)H + O2
hydroxylamine + NAD(P)+ + H2O
show the reaction diagram
-
-
-
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?
ammonia + NADH + H+ + O2
?
show the reaction diagram
-
-
-
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?
benzene + NAD(P)H + O2
cyclohexanol + phenol + hydroquinone + NAD(P)+ + H2O
show the reaction diagram
benzene + NAD(P)H + O2
phenol + NAD(P)+ + H2O
show the reaction diagram
benzene + NADH + H+ + O2
?
show the reaction diagram
-
-
-
-
?
beta-pinene + NAD(P)H + O2
6,6-dimethylbicyclo[3.1.1]hept-2-ene-2-methanol + beta-pinene oxide + NAD(P)+ + H2O
show the reaction diagram
-
-
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?
biphenyl + NAD(P)H + H+ + O2
2-hydroxybiphenyl + 4-hydroxybiphenyl + NAD(P)+ + H2O
show the reaction diagram
-
-
-
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?
bromobenzene + NAD(P)H + O2
bromophenol + NAD(P)+ + H2O
show the reaction diagram
Methylocystis sp.
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sMMO
-
?
bromomethane + NAD(P)H + O2
?
show the reaction diagram
bromomethane + NADH + H+ + O2
?
show the reaction diagram
-
-
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?
butane + NAD(P)H + O2
1-butanol + 2-butanol + NAD(P)+ + H2O
show the reaction diagram
butylene + NAD(P)H + O2
butylene oxide + NAD(P)+ + H2O
show the reaction diagram
Methylocystis sp.
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sMMO
-
?
carbon monoxide + NADH + H+ + O2
?
show the reaction diagram
-
-
-
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?
chlorobenzene + NAD(P)H + O2
chlorophenol + NAD(P)+ + H2O
show the reaction diagram
Methylocystis sp.
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sMMO
-
?
chloromethane + NAD(P)H + O2
formaldehyde + NAD(P)+ + H2O + ?
show the reaction diagram
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?
chloromethane + NADH + H+ + O2
?
show the reaction diagram
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?
chloronaphthalene + NAD(P)H + O2
chloronaphthol + NAD(P)+ + H2O
show the reaction diagram
Methylocystis sp.
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sMMO
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?
chloropentane + NAD(P)H + O2
chloropentanol + NAD(P)+ + H2O
show the reaction diagram
Methylocystis sp.
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sMMO
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?
cis-1,3-dimethylcyclohexane + NAD(P)H + O2
3,5-dimethylcyclohexanol + 1-cis-3-dimethylcyclohexanol + NAD(P)+ + H2O + 1-trans-3-dimethylcyclohexanol
show the reaction diagram
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1-trans-3-dimethylcyclohexanol is produced in a low concentration
?
cis-1,4-dimethylcyclohexane + NAD(P)H + O2
1-cis-4-dimethylcyclohexanol + NAD(P)+ + H2O + trans-2,5-dimethylcyclohexanol
show the reaction diagram
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trans-2,5-dimethylcyclohexanol is produced in a low concentration
?
cis-2-butene + NAD(P)H + O2
cis-2,3-epoxybutane + cis-2-buten-1-ol + 2-butanone + NAD(P)+ + H2O
show the reaction diagram
CO + NAD(P)H + O2
CO2 + NAD(P)+ + H2O
show the reaction diagram
cyclohexane + NAD(P)H + O2
cyclohexanol + NAD(P)+ + H2O
show the reaction diagram
cyclohexene + NAD(P)H + O2
epoxycyclohexane + 2-cyclohexen-1-ol + NAD(P)+ + H2O
show the reaction diagram
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?
cytochrome c + NAD(P)H + O2
reduced cytochrome c + NAD(P)+ + H2O
show the reaction diagram
Methylocystis sp.
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sMMO
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?
dichloromethane + NAD(P)H + O2
CO + Cl- + NAD(P)+ + H2O
show the reaction diagram
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?
diethyl ether + NAD(P)H + O2
ethanol + ethanal + NAD(P)+ + H2O
show the reaction diagram
difluoromethane + NADH + O2
difluoromethanol + NAD+ + H2O
show the reaction diagram
dimethyl ether + NAD(P)H + O2
methanol + formaldehyde + NAD(P)+ + H2O
show the reaction diagram
dimethyl ether + NADH + H+ + O2
?
show the reaction diagram
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?
ethane + NAD(P)H + O2
ethanol + NAD(P)+ + H2O
show the reaction diagram
ethane + NADH + O2
?
show the reaction diagram
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?
ethane + NADH + O2
ethanol + NAD+ + H2O
show the reaction diagram
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?
ethene + NAD(P)H + O2
epoxyethane + NAD(P)+ + H2O
show the reaction diagram
ethylbenzene + NAD(P)H + H+ + O2
1-phenylethanol + 3-ethylphenol + 4-ethylphenol + NAD(P)+ + H2O
show the reaction diagram
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?
fluorobenzene + NAD(P)H + O2
fluorophenol + NAD(P)+ + H2O
show the reaction diagram
Methylocystis sp.
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sMMO
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?
fluoromethane + NADH + O2
fluoromethanol + NAD+ + H2O
show the reaction diagram
formate + NAD(P)H + O2
?
show the reaction diagram
-
assay with whole cells
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?
furan + NAD(P)H + O2
?
show the reaction diagram
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?
furan + NADH + O2
? + NAD+ + H2O
show the reaction diagram
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?
heptane + NAD(P)H + O2
1-heptanol + 2-heptanol + NAD(P)+ + H2O
show the reaction diagram
hexane + NAD(P)H + O2
1-hexanol + 2-hexanol + NAD(P)+ + H2O
show the reaction diagram
isobutane + NAD(P)H + O2
2-methyl-1-propanol + 2-methyl-2-propanol + NADP+ + H2O
show the reaction diagram
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?
isopentane + NAD(P)H + O2
2-methylbutan-1-ol + 3-methylbutan-1-ol + 2-methylbutan-2-ol + 3-methylbutan-2-ol + NADP+ + H2O
show the reaction diagram
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?
methane + duroquinol + O2
methanol + duroquinone + H2O
show the reaction diagram
methane + NAD(P)H + H+ + O2
methanol + NAD(P)+ + H2O
show the reaction diagram
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?
methane + NAD(P)H + O2
methanol + NAD(P)+ + H2O
show the reaction diagram
methane + NADH + H+ + O2
methanol + H2O + NAD+
show the reaction diagram
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-
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?
methane + NADH + H+ + O2
methanol + NAD+ + H2O
show the reaction diagram
methane + NADH + O2
methanol + NAD+ + H2O
show the reaction diagram
methane + trans-dichloroethylene + vinyl chloride + trichloroethylene + ?
formaldehyde + ?
show the reaction diagram
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each of these compounds is completely degraded by sMMO-expressing cells when initial concentrations are either 0.01 or 0.03 mM
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?
methanol + NADH + H+ + O2
? + H2O + NAD+
show the reaction diagram
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substrate of intermediate species, Hperoxo and Q, kinetics, overview
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?
methylamine + NADH + H+ + O2
hydroxymethylamine + H2O + NAD+
show the reaction diagram
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substrate of intermediate species, Hperoxo and Q, kinetics, overview
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?
methylcyanide + NADH + H+ + O2
hydroxymethylcyanide + H2O + NAD+
show the reaction diagram
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substrate of intermediate species, Hperoxo and Q, kinetics, and proposed mechanism of CH3CN hydroxylation by Hperoxo, overview
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?
methylene cyclohexane + NAD(P)H + O2
1-cyclohexane-1-methanol + methylene cyclohexane oxide + 4-hydroxymethylene cyclohexane + NAD(P)+ + H2O
show the reaction diagram
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-
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?
naphthalene + NAD(P)H + H+ + O2
alpha-naphthol + beta-naphthol + NAD(P)+ + H2O
show the reaction diagram
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?
naphthalene + NAD(P)H + O2
alpha-naphthol + beta-naphthol + NAD(P)+ + H2O
show the reaction diagram
naphthalene + NADH + H+
alpha-naphthol + beta-naphthol + NAD+ + H2O
show the reaction diagram
nitrobenzene + NADH + O2
nitrophenol + NAD+ + H2O
show the reaction diagram
nitromethane + NADH + H+ + O2
?
show the reaction diagram
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-
-
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?
octane + NAD(P)H + O2
1-octanol + 2-octanol + NAD(P)+ + H2O
show the reaction diagram
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?
pentane + NAD(P)H + O2
1-pentanol + 2-pentanol + NAD(P)+ + H2O
show the reaction diagram
phenylalanine + NAD(P)H + O2
tyrosine + NAD(P)+ + H2O
show the reaction diagram
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?
propane + NAD(P)H + O2
1-propanol + 2-propanol + NAD(P)+ + H2O
show the reaction diagram
propene + NAD(P)H + O2
1,2-epoxypropane + NAD(P)+ + H2O
show the reaction diagram
propene + NADH + H+ + O2
epoxypropane + NAD+ + H2O
show the reaction diagram
propylaldehyde + NADH + H+ + O2
? + H2O + NAD+
show the reaction diagram
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substrate of intermediate species, Hperoxo and Q, kinetics, overview
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?
propylene + duroquinol + O2
propylene oxide + reduced duroquinol + H2O
show the reaction diagram
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?
propylene + NAD(P)H + O2
propylene oxide + NADP+ + H2O
show the reaction diagram
propylene + NADH + H+ + O2
propylene epoxide + NAD+ + H2O
show the reaction diagram
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-
-
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?
propylene + NADH + O2
propylene + NADH + O2
show the reaction diagram
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-
-
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?
propylene + NADH + O2
propylene epoxide + NAD+ + H2O
show the reaction diagram
propylene + NADH + O2
propylene oxide + NAD+ + H2O
show the reaction diagram
pyridine + NAD(P)H + O2
pyridine N-oxide + NAD(P)+ + H2O
show the reaction diagram
-
-
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?
pyridine + NADH + H+ + O2
?
show the reaction diagram
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-
-
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?
styrene + NAD(P)H + O2
styrene epoxide + NAD(P)+ + H2O
show the reaction diagram
styrene + NADH + H+ + O2
?
show the reaction diagram
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-
-
-
?
toluene + NAD(P)H + H+ + O2
benzyl alcohol + cresol + NAD(P)+ + H2O
show the reaction diagram
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-
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?
toluene + NAD(P)H + O2
benzyl alcohol + cresol + NAD(P)+ + H2O
show the reaction diagram
-
-
-
?
toluene + NAD(P)H + O2
benzyl alcohol + NAD(P)+ + H2O
show the reaction diagram
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-
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?
toluene + NAD(P)H + O2
cresol + NAD(P)+ + H2O
show the reaction diagram
Methylocystis sp.
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sMMO
-
?
trans-2-butene + NAD(P)H + O2
trans-2,3-epoxybutane + trans-2-buten-1-ol + NAD(P)+ + H2O
show the reaction diagram
trichloromethane + NAD(P)H + O2
CO2 + Cl- + NAD(P)+ + H2O
show the reaction diagram
-
-
-
?
trichloromethane + NADH + H+ + O2
?
show the reaction diagram
-
-
-
-
?
xylene + NAD(P)H + O2
xylenol + NAD(P)+ + H2O
show the reaction diagram
Methylocystis sp.
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sMMO
-
?
additional information
?
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NATURAL SUBSTRATES
NATURAL PRODUCTS
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
formate + NAD(P)H + O2
?
show the reaction diagram
-
assay with whole cells
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?
methane + duroquinol + O2
methanol + duroquinone + H2O
show the reaction diagram
methane + NAD(P)H + O2
methanol + NAD(P)+ + H2O
show the reaction diagram
methane + NADH + H+ + O2
methanol + H2O + NAD+
show the reaction diagram
-
-
-
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?
methane + NADH + H+ + O2
methanol + NAD+ + H2O
show the reaction diagram
methane + NADH + O2
methanol + NAD+ + H2O
show the reaction diagram
additional information
?
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COFACTOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
cytochrome c
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one of three protein components is a soluble CO-binding cytochrome c
Ferredoxin
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several MMOR ferredoxin analogues, intermolecular electron transfer from ferredoxin analogues to hydroxylase protein MMOH, redox potential determinations, overview
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NADPH
additional information
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METALS and IONS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
copper
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the enzyme expresses the soluble enzyme form under copper limitation, and the membrane-bound particulate MMO at high copper-to-biomass ratio, mechanism of the copper switch involves a tetrameric 480 kDA sensor protein MmoS, encoded by gene mmoS, as part of a two-component signaling system, domain organization, MmoS contains a FAD cofactor, indirect regulation without binding of copper to MmoS, overview
Ni2+
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protein B contains 0.04 mol Ni2+ per mol protein
[2Fe-2S] cluster
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bound to the MMOR enzyme component
additional information
INHIBITORS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
2,3-Dimercaptopropan-1-ol
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2,4-Dichloro-(6-phenylphenoxy)ethylamine hydrochloride
2,4-Dichloro-(6-phenylphenoxy)ethyldiethylamine
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2-mercaptoethanol
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3-Amino-1,2,4-triazole
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8-hydroxyquinoline
Acetylene
Allylthiourea
ammonium chloride
-
slightly
Cd2+
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soluble enzyme form more than the membrane-bound form
Chloramphenicol
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sMMO
Co2+
Methylocystis sp.
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slightly, sMMO
Dichloromethane
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competitively in presence of formate
Dimercaptopropanol
-
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Dithionite
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34% inhibition at 5 mM
DTT
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24% inhibition at 20 mM
ethyl carbamate
-
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glycerol
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40% inhibition at 15%
Hg2+
Methylocystis sp.
-
complete inhibition at 0.01 mM
methylamine
-
slightly
N2
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N2 atmosphere causes 28% inhibition
o-phenanthroline
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poly-beta-hydroxybutyrate
protein MMOB
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inhibition of sMMO auxiliary proteins MMOB or MMOD severely diminishes electron-transfer throughput from MMOR, primarily by shifting the bulk of electron transfer to the slowest pathway, the biphasic reactions for electron transfer to MMOH from several MMOR ferredoxin analogues are also inhibited, overview
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protein MMOD
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inhibition of sMMO auxiliary proteins MMOB or MMOD severely diminishes electron-transfer throughput from MMOR, primarily by shifting the bulk of electron transfer to the slowest pathway, the biphasic reactions for electron transfer to MMOH from several MMOR ferredoxin analogues are also inhibited, overview
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Thiosemicarbazide
-
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trichlorethylene
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non-competitively; pMMO
additional information
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ACTIVATING COMPOUND
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
catalase
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reduction current is enhanced by the presence of catalase ot if the reaction is performed in a flow-cell, probably because O2 is reduced to H2O2, by the hydroxylase component of the enzyme MMOH at the electrode surface and the H2O2 then inactivates the enzyme unless removed by catalase or a continous flow solution
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regulatory protein MMOB
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the native regulatory protein MMOB is required for maximum enzyme activity
-
additional information
-
KM VALUE [mM]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
0.003 - 0.066
methane
0.0064 - 0.0558
NADH
5.2
NADPH
Methylocystis sp.
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sMMO component C reductase
additional information
additional information
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TURNOVER NUMBER [1/s]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
7.6
furan
Methylosinus trichosporium
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3.7
methane
Methylosinus trichosporium
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-
4.4
Propene
Methylosinus trichosporium
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-
0.23
propylene
Methylococcus capsulatus
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25C, purified enzyme
additional information
additional information
-
SPECIFIC ACTIVITY [µmol/min/mg]
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
0.00011
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purified enzyme, using propylene and duroquinol as substrates
0.0008
Methylocystis sp.
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sMMO, substrate chloronaphthalene
0.0012
Methylocystis sp.
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sMMO, substrate naphthalene
0.0029
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membrane-bound enzyme, using propylene and NADH as substrates
0.003
-
membrane-bound enzyme, using propylene and duroquinol as substrates
0.0039
Methylocystis sp.
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sMMO, substrate chloropentane
0.0122
Methylocystis sp.
-
sMMO, low copper growth concentration, growth substrate nitrate
0.0191
Methylocystis sp.
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sMMO, substrate butylene
0.02 - 0.04
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purified MMOH, substrate propylene
0.0254
Methylocystis sp.
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sMMO, substrate propylene
0.0336
Methylocystis sp.
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sMMO, substrate ethylene
0.072
-
component A
0.1
-
about, all 3 components individually
0.185
-
component A
0.205
Methylocystis sp.
-
sMMO, substrate diethylic ether
0.208
-
purified component A hydroxylase
0.265
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protein A after reconstitution of iron
0.3 - 0.45
-
pH 7.0, 45C
0.334
Methylocystis sp.
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sMMO, substrate propane
0.604
-
purified enzyme, substrate propylene
0.764
-
all components, substrate propene
1.66
-
sMMO protein B triple mutant G10A/G13Q/G16A
2.284
-
His-tagged sMMO protein B triple mutant G10A/G13Q/G16A
3.99
-
sMMO protein B mutant G13Q
5.09
-
sMMO, wild-type enzyme
5.71
-
purified component C
11.37
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purified protein B
17.5
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component C
26.1
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purified enzyme, substrate propene
additional information
pH OPTIMUM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
7.2
Methylocystis sp.
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assay at
7.5
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furan, propene
8.5 - 9
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component C
pH RANGE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
6.4 - 7.4
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pH 6.4: about 20% of activity maximum, pH 7.4: about 25% of activity maximum
TEMPERATURE OPTIMUM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
30
-
assay at, hydroxylase component
pI VALUE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
5.2
-
isoelectric focusing
SOURCE TISSUE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
SOURCE
additional information
LOCALIZATION
ORGANISM
UNIPROT
COMMENTARY hide
GeneOntology No.
LITERATURE
SOURCE