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3,6-diketocamphane 1,6-monooxygenase
3,6-diketocamphane lactonizing enzyme
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-
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3,6-diketocamphane monooxygenase
3,6-diketocamphane-monooxygenase
type II Baeyer-Villiger 3,6-diketocamphane monooxygenase
3,6-diketocamphane 1,6-monooxygenase

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different enzyme with similar biochemical properties, immunological cross-reactivity
3,6-diketocamphane 1,6-monooxygenase
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i.e. 3,6-DKCMO
3,6-diketocamphane 1,6-monooxygenase
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isoform, which is probably a different enzyme
3,6-diketocamphane 1,6-monooxygenase
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isozyme, enantiocomplementary and isofunctional isozymes 2,5-DKCMO EC 1.14.15.2 and 3,6-DKCMO EC 1.14.15.x
3,6-diketocamphane 1,6-monooxygenase
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3,6-diketocamphane 1,6-monooxygenase
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different enzyme with similar biochemical properties, immunological cross-reactivity
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3,6-diketocamphane 1,6-monooxygenase
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isoform, which is probably a different enzyme
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3,6-diketocamphane 1,6-monooxygenase
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isoform, which is probably a different enzyme
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3,6-diketocamphane 1,6-monooxygenase
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isozyme, enantiocomplementary and isofunctional isozymes 2,5-DKCMO EC 1.14.15.2 and 3,6-DKCMO EC 1.14.15.x
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3,6-diketocamphane 1,6-monooxygenase
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3,6-diketocamphane monooxygenase

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3,6-diketocamphane monooxygenase
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3,6-diketocamphane monooxygenase
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3,6-diketocamphane monooxygenase
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3,6-diketocamphane-monooxygenase

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3,6-diketocamphane-monooxygenase
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3,6-DKCMO

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3,6-DKMO

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camE36

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DKCMO

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type II Baeyer-Villiger 3,6-diketocamphane monooxygenase

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type II Baeyer-Villiger 3,6-diketocamphane monooxygenase
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additional information

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2 diketocamphane monooxygenases in Pseudomonas putida
additional information
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lower regio- and enatioselectivity than isoform 2,5-diketocamphane-1,2-monooxygenase
additional information
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lower regio- and enatioselectivity than isoform 2,5-diketocamphane-1,2-monooxygenase
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(-)-bornane-2,5-dione + O2 + FMNH2 = (-)-5-oxo-1,2-campholide + FMN + H2O
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(-)-bornane-2,5-dione + reduced rubredoxin + O2 + FMNH2 = (-)-5-oxo-1,2-campholide + FMN + H2O
(-)-bornane-2,5-dione + reduced rubredoxin + O2 + FMNH2 = (-)-5-oxo-1,2-campholide + FMN + H2O

mechanism
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(-)-bornane-2,5-dione + reduced rubredoxin + O2 + FMNH2 = (-)-5-oxo-1,2-campholide + FMN + H2O
catalysis of 2 mechanistically different types of biochemical reactions within the confines of the same active site
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(-)-bornane-2,5-dione + reduced rubredoxin + O2 + FMNH2 = (-)-5-oxo-1,2-campholide + FMN + H2O
belongs to group of Bayer-Villiger monooxygenases of the NADH plus FMN-dependent type 2 enzymes
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(-)-bornane-2,5-dione + reduced rubredoxin + O2 + FMNH2 = (-)-5-oxo-1,2-campholide + FMN + H2O
cubic space active site model, topography
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(-)-bornane-2,5-dione + reduced rubredoxin + O2 + FMNH2 = (-)-5-oxo-1,2-campholide + FMN + H2O
isozyme, enantiocomplementary and isofunctional isozymes 2,5-DKCMO EC 1.14.15.2 and 3,6-DKCMO EC 1.14.15.x
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(-)-bornane-2,5-dione + reduced rubredoxin + O2 + FMNH2 = (-)-5-oxo-1,2-campholide + FMN + H2O
higher activity in oxidation of sulfides to the corresponding sulfoxides than in lactonization of ketones
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(-)-bornane-2,5-dione + reduced rubredoxin + O2 + FMNH2 = (-)-5-oxo-1,2-campholide + FMN + H2O
i.e. cyclopentaneacetic acid, 3-hydroxy-2,2,3-trimethyl-5-oxo, delta-lactone, reacts sponaneously to (2,2-dimethyl-5-oxo-cyclopent-3-en-1-yl)acetic acid
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(-)-bornane-2,5-dione + reduced rubredoxin + O2 + FMNH2 = (-)-5-oxo-1,2-campholide + FMN + H2O
mechanism
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(-)-bornane-2,5-dione + reduced rubredoxin + O2 + FMNH2 = (-)-5-oxo-1,2-campholide + FMN + H2O
belongs to group of Bayer-Villiger monooxygenases of the NADH plus FMN-dependent type 2 enzymes
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(+)-camphor + FMNH2 + O2
? + FMN + H2O
(+/-)-cis-bicyclo[3.2.0]hept-2-en-6-one + FMNH2 + O2
?
(-)-bornane-2,5-dione + FMNH2 + O2
1,8,8-trimethyl-2-oxabicyclo[3.2.1]octane-3,6-dione + FMN + H2O
(-)-bornane-2,5-dione + FMNH2 + O2
?
(-)-bornane-2,5-dione + O2 + FMNH2
(-)-5-oxo-1,2-campholide + FMN + H2O
(-)-bornanone + FMNH2 + O2
?
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i.e. (-)-camphor
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?
(-)-camphor + FMNH2 + O2
?
(-)-camphor + FMNH2 + O2
? + FMN + H2O
(R,R)-bicyclo[2.2.1]heptane-2,5-dione + FMNH2 + O2
?
2,3,4,5-tetramethyl-2-cyclopenten-1-one + FMNH2 + O2
?
2-cyclohexen-1-one + FMNH2 + O2
?
50% conversion
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?
2-cyclopenten-1-one + FMNH2 + O2
?
48% conversion
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?
2-decanone + FMNH2 + O2
?
11% conversion
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?
3,5,5-trimethyl-2-cyclohexen-1-one + FMNH2 + O2
?
21% conversion
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?
3,6-diketocamphane + FMNH2 + O2
? + NAD+ + H2O
3-methyl-2-cyclohexen-1-one + FMNH2 + O2
?
20% conversion
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?
3-methyl-2-cyclopenten-1-one + FMNH2 + O2
?
10% conversion
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?
4-phenyl-2-butanone + FMNH2 + O2
?
48% conversion
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?
acetophenone + FMNH2 + O2
?
80% conversion
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?
cyclobutanone + FMNH2 + O2
?
13% conversion
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?
cyclohexanone + FMNH2 + O2
?
3% conversion
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?
cyclopentanone + FMNH2 + O2
?
24% conversion
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?
norcamphor + FMNH2 + O2
?
77% conversion
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?
additional information
?
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(+)-camphor + FMNH2 + O2

? + FMN + H2O
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?
(+)-camphor + FMNH2 + O2
? + FMN + H2O
88% conversion
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?
(+)-camphor + FMNH2 + O2
? + FMN + H2O
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?
(+)-camphor + FMNH2 + O2
? + FMN + H2O
88% conversion
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?
(+/-)-cis-bicyclo[3.2.0]hept-2-en-6-one + FMNH2 + O2

?
99% conversion
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?
(+/-)-cis-bicyclo[3.2.0]hept-2-en-6-one + FMNH2 + O2
?
99% conversion
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?
(-)-bornane-2,5-dione + FMNH2 + O2

1,8,8-trimethyl-2-oxabicyclo[3.2.1]octane-3,6-dione + FMN + H2O
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6-dione i.e. 3,6-diketocamphane
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?
(-)-bornane-2,5-dione + FMNH2 + O2
1,8,8-trimethyl-2-oxabicyclo[3.2.1]octane-3,6-dione + FMN + H2O
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6-dione i.e. 3,6-diketocamphane
i.e. cyclopentaneacetic acid, 3-hydroxy-2,2,3-trimethyl-5-oxo, delta-lactone, i.e. 3,4,4-trimethyl-6-carboxy-methyl-DELTA3-cyclopentenone, product is an unstable lactone-intermediate and forms spontaneously (2,2-dimethyl-5-oxo-cyclopent-3-en-1-yl)acetic acid, i.e. 2-oxo-DELTA3-4,5,5-trimethylcyclopentenyl acetic acid
?
(-)-bornane-2,5-dione + FMNH2 + O2
1,8,8-trimethyl-2-oxabicyclo[3.2.1]octane-3,6-dione + FMN + H2O
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6-dione i.e. 3,6-diketocamphane
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?
(-)-bornane-2,5-dione + FMNH2 + O2

?
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inducible by growth on (+)-camphor
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?
(-)-bornane-2,5-dione + FMNH2 + O2
?
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inducible by growth on racemic camphor
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?
(-)-bornane-2,5-dione + FMNH2 + O2
?
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inducible by growth on (+)-camphor
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?
(-)-bornane-2,5-dione + O2 + FMNH2

(-)-5-oxo-1,2-campholide + FMN + H2O
the enzyme is involved in the degradation of (-)-camphor
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?
(-)-bornane-2,5-dione + O2 + FMNH2
(-)-5-oxo-1,2-campholide + FMN + H2O
the enzyme requires a dedicated NADH-FMN reductase (FMN reductase (NADH)), FMN-dependent two-component monooxygenase system
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?
(-)-bornane-2,5-dione + O2 + FMNH2
(-)-5-oxo-1,2-campholide + FMN + H2O
the enzyme is involved in the degradation of (-)-camphor
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-
?
(-)-bornane-2,5-dione + O2 + FMNH2
(-)-5-oxo-1,2-campholide + FMN + H2O
the enzyme requires a dedicated NADH-FMN reductase (FMN reductase (NADH)), FMN-dependent two-component monooxygenase system
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?
(-)-camphor + FMNH2 + O2

?
conversion to lactone, no conversion of (+)-camphor
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?
(-)-camphor + FMNH2 + O2
?
conversion to lactone, no conversion of (+)-camphor
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?
(-)-camphor + FMNH2 + O2

? + FMN + H2O
91% conversion
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-
?
(-)-camphor + FMNH2 + O2
? + FMN + H2O
91% conversion
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-
?
(R,R)-bicyclo[2.2.1]heptane-2,5-dione + FMNH2 + O2

?
26% conversion
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-
?
(R,R)-bicyclo[2.2.1]heptane-2,5-dione + FMNH2 + O2
?
26% conversion
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-
?
2,3,4,5-tetramethyl-2-cyclopenten-1-one + FMNH2 + O2

?
43% conversion
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-
?
2,3,4,5-tetramethyl-2-cyclopenten-1-one + FMNH2 + O2
?
43% conversion
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-
?
3,6-diketocamphane + FMNH2 + O2

? + NAD+ + H2O
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-
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?
3,6-diketocamphane + FMNH2 + O2
? + NAD+ + H2O
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?
additional information

?
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enzyme is associated with a NADH oxidase
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?
additional information
?
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enzyme is associated with a NADH oxidase
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?
additional information
?
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several sulfides and bicyclo[3,2,0]hept-2-en-6-one are enantioselectively oxidized to the corresponding sulfoxides and oxa lactones, respectively
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?
additional information
?
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rubredoxin not mentioned
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?
additional information
?
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rubredoxin not mentioned
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?
additional information
?
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rubredoxin not mentioned
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?
additional information
?
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catalyzes stereoselective electrophilic biooxidation of a wide range of prochiral organic sulfoxides to the corresponding chiral sulfoxides as well as the nucleophilic biooxidation of ketones to lactones with different enantio- and stereoselectivity, overview
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?
additional information
?
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mechanism of enantioselectivity for the hydroxyl-peroxide rearrangement taking place in the BVMO active site
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?
additional information
?
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mechanism of enantioselectivity for the hydroxyl-peroxide rearrangement taking place in the BVMO active site
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?
additional information
?
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rubredoxin not mentioned
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?
additional information
?
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mechanism of enantioselectivity for the hydroxyl-peroxide rearrangement taking place in the BVMO active site
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?
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(+)-camphor + FMNH2 + O2
? + FMN + H2O
(-)-bornane-2,5-dione + FMNH2 + O2
?
(-)-bornane-2,5-dione + O2 + FMNH2
(-)-5-oxo-1,2-campholide + FMN + H2O
3,6-diketocamphane + FMNH2 + O2
? + NAD+ + H2O
additional information
?
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catalyzes stereoselective electrophilic biooxidation of a wide range of prochiral organic sulfoxides to the corresponding chiral sulfoxides as well as the nucleophilic biooxidation of ketones to lactones with different enantio- and stereoselectivity, overview
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?
(+)-camphor + FMNH2 + O2

? + FMN + H2O
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?
(+)-camphor + FMNH2 + O2
? + FMN + H2O
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?
(-)-bornane-2,5-dione + FMNH2 + O2

?
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inducible by growth on (+)-camphor
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-
?
(-)-bornane-2,5-dione + FMNH2 + O2
?
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inducible by growth on racemic camphor
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-
?
(-)-bornane-2,5-dione + FMNH2 + O2
?
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inducible by growth on (+)-camphor
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?
(-)-bornane-2,5-dione + O2 + FMNH2

(-)-5-oxo-1,2-campholide + FMN + H2O
the enzyme is involved in the degradation of (-)-camphor
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-
?
(-)-bornane-2,5-dione + O2 + FMNH2
(-)-5-oxo-1,2-campholide + FMN + H2O
the enzyme is involved in the degradation of (-)-camphor
-
-
?
3,6-diketocamphane + FMNH2 + O2

? + NAD+ + H2O
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-
-
-
?
3,6-diketocamphane + FMNH2 + O2
? + NAD+ + H2O
-
-
-
-
?
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evolution

the orientation of the isoalloxazine ring of the FMN cofactor in the active site of the TIM-barrel fold enzyme differs significantly from that previously observed in enzymes of the bacterial luciferase-like superfamily. The Ala77 residue is in a cis conformation and forms a beta-bulge at the C-terminus of beta-strand 3, which is a feature observed in many proteins of this superfamily. Both the 2,5-DKMO and 3,6-DKMO oxygenating components have sequence similarity to bacterial luciferases and bear little similarity to type I Baeyer-Villiger monooxygenase, type I BVMOs
evolution
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type 2 Baeyer-Villiger monooxygenases (type 2 BVMOs) are a subgroup of the NAD(P)H:FMN-dependent two-component monooxygenases (TCMOs). They can alternatively be classed as a subgroup of the NAD(P)H:FMN-dependent class C flavoprotein monooxygenases
evolution
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type 2 Baeyer-Villiger monooxygenases (type 2 BVMOs) are a subgroup of the NAD(P)H:FMN-dependent two-component monooxygenases (TCMOs). They can alternatively be classed as a subgroup of the NAD(P)H:FMN-dependent class C flavoprotein monooxygenases
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evolution
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the orientation of the isoalloxazine ring of the FMN cofactor in the active site of the TIM-barrel fold enzyme differs significantly from that previously observed in enzymes of the bacterial luciferase-like superfamily. The Ala77 residue is in a cis conformation and forms a beta-bulge at the C-terminus of beta-strand 3, which is a feature observed in many proteins of this superfamily. Both the 2,5-DKMO and 3,6-DKMO oxygenating components have sequence similarity to bacterial luciferases and bear little similarity to type I Baeyer-Villiger monooxygenase, type I BVMOs
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metabolism

the enzyme is involved in the camphor-degradation pathway, overview
metabolism
the enzyme is involved in the degradation of (-)-camphor
metabolism
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the enzyme is involved in the degradation of (-)-camphor
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metabolism
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the enzyme is involved in the camphor-degradation pathway, overview
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physiological function

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2,5- and 3,6-diketocamphane monooxygenase (DKCMO) are two enantiocomplementary isoenzymes that catalyse a key lactone-forming step in the degradation of the (+)- and (-)-camphor antipodes, respectively, in Pseudomonas putida NCIMB 10007. Enzyme 3,6-diketocamphane monooxygenase distributes the flavin nucleotide- and nicotinamide nucleotide-dependent tasks between a homodimeric monooxygenase component and a separate flavin reductase (FR) with unbound FMN, the flavin thus effectively serving as a second substrate to transfer reducing power between the functionally distinct subunits. Various flavin reductases function effectively as sources of the requisite FMNH2 to 3,6-diketocamphane monooxygenase at different times throughout growth on camphor, significant subsequent contribution throughout the mid- to late-exponential phases of growth is also made by the camphor-induced homodimeric 37.0 kDa flavin reductase Fred, possible involvement of camphor-induced putidaredoxin reductase as a contributory activity. Analysis of flavin reductases in Pseudomonas putida NCIMB 10007, overview
physiological function
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2,5- and 3,6-diketocamphane monooxygenase (DKCMO) are two enantiocomplementary isoenzymes that catalyse a key lactone-forming step in the degradation of the (+)- and (-)-camphor antipodes, respectively, in Pseudomonas putida NCIMB 10007. Enzyme 3,6-diketocamphane monooxygenase distributes the flavin nucleotide- and nicotinamide nucleotide-dependent tasks between a homodimeric monooxygenase component and a separate flavin reductase (FR) with unbound FMN, the flavin thus effectively serving as a second substrate to transfer reducing power between the functionally distinct subunits. Various flavin reductases function effectively as sources of the requisite FMNH2 to 3,6-diketocamphane monooxygenase at different times throughout growth on camphor, significant subsequent contribution throughout the mid- to late-exponential phases of growth is also made by the camphor-induced homodimeric 37.0 kDa flavin reductase Fred, possible involvement of camphor-induced putidaredoxin reductase as a contributory activity. Analysis of flavin reductases in Pseudomonas putida NCIMB 10007, overview
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additional information

the enzyme is a type II Baeyer-Villiger monooxygenase, enzyme structure modeling, active site structure, overview
additional information
-
the enzyme is a type II Baeyer-Villiger monooxygenase, enzyme structure modeling, active site structure, overview
additional information
-
the enzyme is a type II Baeyer-Villiger monooxygenase, enzyme structure modeling, active site structure, overview
-
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?

x * 40000, SDS-PAGE
?
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x * 17000-18000, native flavin reductase subunit of the enzyme and flavin reductase FRED, SDS-PAGE
?
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x * 17000-18000, native flavin reductase subunit of the enzyme and flavin reductase FRED, SDS-PAGE
-
?
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x * 40000, SDS-PAGE
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dimer

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dimer
2 * 44000, SDS-PAGE
dimer
three-dimensional structure analysis, overview
dimer
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2 * 44000, SDS-PAGE
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dimer
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three-dimensional structure analysis, overview
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monomer

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1 * 40300, oxygenating component, SDS-PAGE
monomer
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1 * 38000, oxygenating component, SDS-PAGE
monomer
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1 * 40300, oxygenating component, SDS-PAGE
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monomer
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1 * 38000, oxygenating component, SDS-PAGE
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additional information

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enzyme consists of 2 components: 1 oxygenating and 1 NADH dehydrogenase
additional information
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enzyme components from a very loose complex
additional information
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enzyme consists of 2 components: 1 oxygenating and 1 NADH dehydrogenase
-
additional information
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enzyme components from a very loose complex
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plate shaped crystals from 4.0 M sodium formate and 28% PEG 8000 in 0.2 M sodium acetate, X-ray analysis
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purified recombinant N-terminally His6-tagged enzyme, by Microbatch crystallization, mixing of 7 mg/ml protein in 20 mM FMN, 5 mM NADH and 5 mM (-)-camphor in a 1:1 ration, purified native enzyme, by vapour-diffusion technique, 10 mg/ml protein solution are mixed in equal volumes with 50 mM PIPES pH 6.5, 50% ammonium sulfate, room temperature, best from 100 mM HEPES pH 7.0, 20% PEG 3350 in the presence of 20 mM FMN, 5 mM NADH and 5 mM (-)-camphor, at 18°C, X-ray diffraction structure determination and analysis at 1.9-2.7 A resolution, the enzyme's crystal structure is solved by a combination of multiple anomalous dispersion from a bromine crystal soak and molecular replacement using a bacterial luciferase model
vapour-diffusion technique, three-dimensional structures of the native enzyme and the FMN complex of the overexpressed form of the oxygenating component of the type II Baeyer-Villiger 3,6-diketocamphane monooxygenase have been determined to 1.9 A resolution
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