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acetoin + 2,6-dichlorophenolindophenol
acetaldehyde + ?
acetoin + CoA + NAD+
acetaldehyde + acetyl-CoA + NADH + H+
diacetyl + 2,6-dichlorophenolindophenol
?
methyl acetoin + 2,6-dichlorophenolindophenol
? + ?
additional information
?
-
acetoin + 2,6-dichlorophenolindophenol

acetaldehyde + ?
Substrates: E1 complex
Products: -
?
acetoin + 2,6-dichlorophenolindophenol
acetaldehyde + ?
Substrates: E1 complex
Products: -
?
acetoin + 2,6-dichlorophenolindophenol
acetaldehyde + ?
-
Substrates: -
Products: -
?
acetoin + CoA + NAD+

acetaldehyde + acetyl-CoA + NADH + H+
Q9HWN1; Q9HWN0
Substrates: -
Products: -
?
acetoin + CoA + NAD+
acetaldehyde + acetyl-CoA + NADH + H+
Q9HWN1; Q9HWN0
Substrates: -
Products: -
?
diacetyl + 2,6-dichlorophenolindophenol

?
Substrates: E1 complex, 59% of the activity with acetoin
Products: -
?
diacetyl + 2,6-dichlorophenolindophenol
?
-
Substrates: -
Products: -
?
diacetyl + CoA + NAD+

?
Q9HWN1; Q9HWN0
Substrates: -
Products: -
?
diacetyl + CoA + NAD+
?
Q9HWN1; Q9HWN0
Substrates: -
Products: -
?
methyl acetoin + 2,6-dichlorophenolindophenol

? + ?
Substrates: E1 complex, 107% of the activity with acetoin
Products: -
?
methyl acetoin + 2,6-dichlorophenolindophenol
? + ?
-
Substrates: -
Products: -
?
additional information

?
-
Substrates: no detectable activity with 2-oxoglutarate, pyruvate or the branched-chain 2-oxoacids, 4-methyl-2-oxopentanoate, 3-methyl-2-oxopentanoate and 3-methyl-2-oxobutanoate
Products: -
?
additional information
?
-
Substrates: no detectable activity with 2-oxoglutarate, pyruvate or the branched-chain 2-oxoacids, 4-methyl-2-oxopentanoate, 3-methyl-2-oxopentanoate and 3-methyl-2-oxobutanoate
Products: -
?
additional information
?
-
-
Substrates: no detectable activity with 2-oxoglutarate, pyruvate or the branched-chain 2-oxoacids, 4-methyl-2-oxopentanoate, 3-methyl-2-oxopentanoate and 3-methyl-2-oxobutanoate
Products: -
?
additional information
?
-
-
Substrates: The combination of purified Ao:DCPIP OR, dihydrolipoamide dehydrogenase, and dihydrolipoamide acetyltransferase in the presence of thiamine diphosphate and the substrate acetoin or methylacetoin results in a coenzyme A-dependent reduction of NAD+
Products: -
?
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additional information
-
disruption of the gene acoA encoding subunit E1alpha results in strains impaired in expression of dephosphate-dependent E1 activity, to remove acetoin from the medium and to grow with acetoin as sole carbon source
malfunction

Q9HWN1; Q9HWN0
acoA, acoB are knocked out individually in Pseudomonas aeruginosa PAO1. The mutants lose the ability to grow in acetoin or 2,3-butanediol
malfunction
-
acoA, acoB are knocked out individually in Pseudomonas aeruginosa PAO1. The mutants lose the ability to grow in acetoin or 2,3-butanediol
-
metabolism

-
the enzyme is involved in the degradation of the sulfonylurea herbicide nicosulfuron
metabolism
-
the aco operon is essential for utilization of acetoin
metabolism
Q9HWN1; Q9HWN0
the enzyme is involved in 2,3-butanediol catabolism
metabolism
-
the enzyme is involved in 2,3-butanediol catabolism
-
metabolism
-
the enzyme is involved in the degradation of the sulfonylurea herbicide nicosulfuron
-
physiological function

-
the acetoin dehydrogenase enzyme system is responsible for R-acetoin dissimilation. Mutants lose the ability to grow on acetoin as the sole carbon source, and the acetoin accumulated cannot be dissimilated. In the presence of another carbon source, the acetoin accumulated in broth of acetoin dehydrogenase mutants is converted to 2,3-butanediol
physiological function
A0A031WDC0; A0A031WD22
an acoA null mutant produces significantly more spores and initiates sporulation earlier than the wild-type. Growth and culture density of Clostridioides difficile is not increased by acetoin availability or disruption of the aco pathway
physiological function
Q8DWD7; Q8DWD6; Q8DWD5; Q8DWD4
deletion mutations of Adh genes confers oxygen-dependent sensitivity to slightly alkaline pH (pH 7.2-7.6), and lead to growth defects when glucose or sucrose serve as major carbon sources. Supplementation of media with 0.5% pyruvate improves growth of Adh mutants. Subunit AdhC interacts with transcription factor SpxA2
physiological function
-
deletion mutations of Adh genes confers oxygen-dependent sensitivity to slightly alkaline pH (pH 7.2-7.6), and lead to growth defects when glucose or sucrose serve as major carbon sources. Supplementation of media with 0.5% pyruvate improves growth of Adh mutants. Subunit AdhC interacts with transcription factor SpxA2
-
physiological function
-
the acetoin dehydrogenase enzyme system is responsible for R-acetoin dissimilation. Mutants lose the ability to grow on acetoin as the sole carbon source, and the acetoin accumulated cannot be dissimilated. In the presence of another carbon source, the acetoin accumulated in broth of acetoin dehydrogenase mutants is converted to 2,3-butanediol
-
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?

x * 35541, subunit E1beta, calculated
?
x * 35532, subunit E1alpha, calculated
additional information

component E1, i.e. acetoin:2,6-dichlorophenolindophenol oxidoreductase, exhibits tetrameric alpha2beta2 structure, with alpha, 35243 Da and beta, 35788 Da, calculated and SDS-PAGE
additional information
component E1, i.e. acetoin:2,6-dichlorophenolindophenol oxidoreductase, exhibits tetrameric alpha2beta2 structure, with alpha, 35243 Da and beta, 35788 Da, calculated and SDS-PAGE
additional information
-
component E1, i.e. acetoin:2,6-dichlorophenolindophenol oxidoreductase, exhibits tetrameric alpha2beta2 structure, with alpha, 38500 and beta, 34000 Da, SDS-PAGE
additional information
component E1, i.e. acetoin:2,6-dichlorophenolindophenol oxidoreductase, exhibits tetrameric alpha2beta2 structure, with alpha, 43000 and beta, 33000 Da, SDS-PAGE
additional information
component E1, i.e. acetoin:2,6-dichlorophenolindophenol oxidoreductase, exhibits tetrameric alpha2beta2 structure, with alpha, 43000 and beta, 33000 Da, SDS-PAGE
additional information
-
component E1, i.e. acetoin:2,6-dichlorophenolindophenol oxidoreductase, exhibits tetrameric alpha2beta2 structure, with alpha, 43000 and beta, 33000 Da, SDS-PAGE
additional information
-
component E1, i.e. acetoin:2,6-dichlorophenolindophenol oxidoreductase, exhibits tetrameric alpha2beta2 structure, with alpha, 37500 Da, and beta, 38500 Da, SDS-PAGE
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Oppermann, F.B.; Schmidt, B.; Steinbuchel, A.
Purification and characterization of acetoin:2,6-dichlorophenolindophenol oxidoreductase, dihydrolipoamide dehydrogenase, and dihydrolipoamide acetyltransferase of the Pelobacter carbinolicus acetoin dehydrogenase enzyme system
J. Bacteriol.
173
757-767
1991
Syntrophotalea carbinolica
brenda
Lorenzl, H.; Oppermann, F.; Schmidt, B.; Steinbuchel, A.
Purification and characterization of the E1 component of the Clostridium magnum acetoin dehydrogenase enzyme system
Antonie van Leeuwenhoek
64
9-15
1993
Clostridium magnum
brenda
Payne, K.A.; Hough, D.W.; Danson, M.J.
Discovery of a putative acetoin dehydrogenase complex in the hyperthermophilic archaeon Sulfolobus solfataricus
FEBS Lett.
584
1231-1234
2010
Saccharolobus solfataricus (Q97YF6), Saccharolobus solfataricus (Q97YF5), Saccharolobus solfataricus
brenda
Huang, M.; Oppermann, F.B.; Steinbuechel, A.
Molecular characterization of the Pseudomonas putida 2,3-butanediol catabolic pathway
FEMS Microbiol. Lett.
124
141-150
1994
Pseudomonas putida (Q52014), Pseudomonas putida (Q52015), Pseudomonas putida
brenda
Priefert, H.; Hein, S.; Krueger, N.; Zeh, K.; Schmidt, B.; Steinbuechel, A.
Identification and molecular characterization of the Alcaligenes eutrophus H16 aco operon genes involved in acetoin catabolism
J. Bacteriol.
173
4056-4071
1991
Alcaligenes eutrophus H16 (P27745), Alcaligenes eutrophus H16 (P27746)
brenda
Krueger, N.; Oppermann, F.B.; Lorenzl, H.; Steinbuechel, A.
Biochemical and molecular characterization of the Clostridium magnum acetoin dehydrogenase enzyme system
J. Bacteriol.
176
3614-3630
1994
Clostridium magnum (Q46143), Clostridium magnum (Q46142), Clostridium magnum
brenda
Huang, M.; Oppermann-Sanio, F.B.; Steinbuechel, A.
Biochemical and molecular characterization of the Bacillus subtilis acetoin catabolic pathway
J. Bacteriol.
181
3837-3841
1999
Bacillus subtilis
brenda
Wang, D.; Zhou, J.; Chen, C.; Wei, D.; Shi, J.; Jiang, B.; Liu, P.; Hao, J.
R-acetoin accumulation and dissimilation in Klebsiella pneumoniae
J. Ind. Microbiol. Biotechnol.
42
1105-1115
2015
Klebsiella pneumoniae, Klebsiella pneumoniae CGMCC 1.6366
brenda
Liu, Q.; Liu, Y.; Kang, Z.; Xiao, D.; Gao, C.; Xu, P.; Ma, C.
2,3-Butanediol catabolism in Pseudomonas aeruginosa PAO1
Environ. Microbiol.
20
3927-3940
2018
Pseudomonas aeruginosa (Q9HWN1 AND Q9HWN0), Pseudomonas aeruginosa, Pseudomonas aeruginosa ATCC 15692 (Q9HWN1 AND Q9HWN0)
brenda
Zhang, Z.; Zhang, Y.; Yang, D.C.; Zhang, J.L.
Expression and functional analysis of three nicosulfuron-degrading enzymes from Bacillus subtilis YB1
J. Environ. Sci. Health B
53
476-485
2018
Bacillus subtilis, Bacillus subtilis YB10
brenda
Peng, Q.; Zhao, X.; Wen, J.; Huang, M.; Zhang, J.; Song, F.
Transcription in the acetoin catabolic pathway is regulated by AcoR and CcpA in Bacillus thuringiensis
Microbiol. Res.
235
126438
2020
Bacillus thuringiensis
brenda
Wetzel, D.; Rizvi, A.; Edwards, A.N.; McBride, S.M.
The predicted acetoin dehydrogenase pathway represses sporulation of Clostridioides difficile
BioRxiv
FEHLT
0000
2023
Clostridioides difficile (A0A031WDC0 and A0A031WD22)
brenda
Zuber, P.; Nakano, M.M.; Kajfasz, J.K.; Lemos, J.A.
Disruption of the adh (acetoin dehydrogenase) operon has wide-ranging effects on Streptococcus mutans growth and stress response
J. Bacteriol.
204
e0057821
2022
Streptococcus mutans (Q8DWD7 and Q8DWD6 and Q8DWD5 and Q8DWD4), Streptococcus mutans UA159 (Q8DWD7 and Q8DWD6 and Q8DWD5 and Q8DWD4)
brenda