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Enzyme Nomenclature
Information on EC 3.1.2.32 - 2-aminobenzoylacetyl-CoA thioesterase
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The expected taxonomic range for this enzyme is: Pseudomonas aeruginosa
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EC NUMBER 
COMMENTARY 
3.1.2.32
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RECOMMENDED NAME
GeneOntology No.
2-aminobenzoylacetyl-CoA thioesterase
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REACTION
REACTION DIAGRAM
COMMENTARY
ORGANISM
UNIPROT
LITERATURE
2-aminobenzoylacetyl-CoA + H2O = 2-aminobenzoylacetate + CoA
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PATHWAY
BRENDA Link
KEGG Link
MetaCyc Link
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SYSTEMATIC NAME
IUBMB Comments
2-aminobenzoylacetyl-CoA hydrolase
The enzyme, characterized from the bacterium Pseudomonas aeruginosa, participates in the production of the signal molecule 2-heptyl-4(1H)-quinolone (HHQ).
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ORGANISM
COMMENTARY
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
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GENERAL INFORMATION
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
physiological function
physiological function
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enzyme is part of the quinolone signal pathway. The regulatory function of PqsE is not linked to its thioesterase activity and must be encoded outside of the active center
physiological function
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in biosynthesis of the alkylquinolones 2-heptyl-3-hydroxy-4(1H)-quinolone and 2-heptyl-4(1H)-quinolone, PqsE acts as thioesterase, hydrolyzing the biosynthetic intermediate 2-aminobenzoylacetyl-coenzyme A to form 2-aminobenzoylacetate, the precursor of 2-heptyl-4(1H)-quinolone and 2-aminoacetophenone. The role of PqsE can be taken over to some extent by the broad-specificity thioesterase TesB. A pqsE mutant produces increased levels of 2,4-dihydroxyquinoline, resulting from intramolecular cyclization of 2-aminobenzoylacetyl-coenzyme A
physiological function
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the active site of the enzyme involves residues that extend further into the hydrophobic core of the protein, advocating for a lid-like movement of the two terminal helices. A unique C-terminal alpha-helical motif is important for the molecular function
physiological function
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enzyme is part of the quinolone signal pathway. The regulatory function of PqsE is not linked to its thioesterase activity and must be encoded outside of the active center
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physiological function
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in biosynthesis of the alkylquinolones 2-heptyl-3-hydroxy-4(1H)-quinolone and 2-heptyl-4(1H)-quinolone, PqsE acts as thioesterase, hydrolyzing the biosynthetic intermediate 2-aminobenzoylacetyl-coenzyme A to form 2-aminobenzoylacetate, the precursor of 2-heptyl-4(1H)-quinolone and 2-aminoacetophenone. The role of PqsE can be taken over to some extent by the broad-specificity thioesterase TesB. A pqsE mutant produces increased levels of 2,4-dihydroxyquinoline, resulting from intramolecular cyclization of 2-aminobenzoylacetyl-coenzyme A; the active site of the enzyme involves residues that extend further into the hydrophobic core of the protein, advocating for a lid-like movement of the two terminal helices. A unique C-terminal alpha-helical motif is important for the molecular function
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SUBSTRATE
PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
2-aminobenzoylacetyl-CoA + H2O
2-aminobenzoylacetate + CoA
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?
2-aminobenzoylacetyl-CoA + H2O
2-aminobenzoylacetate + CoA
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?
2-aminobenzoylacetyl-CoA + H2O
2-aminobenzoylacetate + CoA
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-
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?
acetoacetyl-CoA + H2O
3-oxobutanoic acid + CoA
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-
-
?
cysteamine S-phosphate + H2O
cysteamine + phosphate
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-
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?
cysteamine S-phosphate + H2O
cysteamine + phosphate
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?
S-(4-nitrobenzoyl)mercaptoethane + H2O
4-nitrobenzoate + mercaptoethane
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-
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?
S-(4-nitrobenzoyl)mercaptoethane + H2O
4-nitrobenzoate + mercaptoethane
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-
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-
?
S-ethyl-acetothioacetate + H2O
3-oxobutanoic acid + thioethanol
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-
-
?
S-ethyl-acetothioacetate + H2O
3-oxobutanoic acid + thioethanol
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?
additional information
?
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no substrates: anthraniloyl-CoA (or benzoyl-CoA), malonyl-CoA and octanoyl-CoA
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additional information
?
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the enzyme slowly hydrolyzes phosphodiesters including single- and double-strandedDNA as well as mRNA and also the thioester S-(4-nitrobenzoyl)mercaptoethane. No substrates: acetyl-CoA, malonyl-CoA, benzoyl-CoA, L-lactoylglutathione
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additional information
?
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the enzyme slowly hydrolyzes phosphodiesters including single- and double-strandedDNA as well as mRNA and also the thioester S-(4-nitrobenzoyl)mercaptoethane. No substrates: acetyl-CoA, malonyl-CoA, benzoyl-CoA, L-lactoylglutathione
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additional information
?
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no substrates: anthraniloyl-CoA (or benzoyl-CoA), malonyl-CoA and octanoyl-CoA
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NATURAL SUBSTRATES
NATURAL PRODUCTS
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
2-aminobenzoylacetyl-CoA + H2O
2-aminobenzoylacetate + CoA
A0A0H2Z6F6
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?
2-aminobenzoylacetyl-CoA + H2O
2-aminobenzoylacetate + CoA
A0A0H2Z6F6
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?
additional information
?
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A0A0H2Z6F6
no substrates: anthraniloyl-CoA (or benzoyl-CoA), malonyl-CoA and octanoyl-CoA
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additional information
?
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A0A0H2Z6F6
no substrates: anthraniloyl-CoA (or benzoyl-CoA), malonyl-CoA and octanoyl-CoA
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METALS and IONS
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
Fe2+
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3.3fold stimulation of EDTA-treated protein. Protein has a Fe(II)Fe(III) center in the active site, crystallization data
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INHIBITORS
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
2-(1H-pyrrol-1-yl)benzoic acid
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compound binds to the active center, presence does not affect the levels of the PqsE-regulated virulence factor pyocyanin
2-(pyridin-3-yl)benzoic acid
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compound binds to the active center, presence does not affect the levels of the PqsE-regulated virulence factor pyocyanin
2-aminobenzoylacetate
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compound binds to the active center, presence does not affect the levels of the PqsE-regulated virulence factor pyocyanin
3-methylthiophene-2-carboxylic acid
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compound binds to the active center, presence does not affect the levels of the PqsE-regulated virulence factor pyocyanin
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KM VALUE [mM]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
0.013
S-(4-nitrobenzoyl)mercaptoethane
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mutant E182A, pH 8.5, 25°C, presence of Mn2+
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0.014
S-(4-nitrobenzoyl)mercaptoethane
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wild-type, pH 8.5, 25°C, presence of Mn2+
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TURNOVER NUMBER [1/s]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
0.003
S-(4-nitrobenzoyl)mercaptoethane
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mutant E182A, pH 8.5, 25°C, presence of Mn2+
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0.12
S-(4-nitrobenzoyl)mercaptoethane
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wild-type, pH 8.5, 25°C, presence of Mn2+
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IC50 VALUE [mM]
INHIBITOR
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
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PDB
SCOP
CATH
UNIPROT
ORGANISM
Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1);
P20581
Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1);
P20581
Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1);
P20581
Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1);
P20581
Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1);
P20581
Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1);
P20581
Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1);
P20581
Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1);
P20581
Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1);
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Crystallization/COMMENTARY
ORGANISM
UNIPROT
LITERATURE
in complex with inhbitors 2-aminobenzoylacetate, 2-(pyridin-3-yl)benzoic acid, 2-(1H-pyrrol-1-yl)benzoic acid and 3-methylthiophene-2-carboxylic acid
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structure of recombinant PqsE. The Protein possesses a metallo-beta-lactamase fold with an Fe(II)Fe(III) center in the active site. A copurified ligand is benzoate
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Cloned/COMMENTARY
ORGANISM
UNIPROT
LITERATURE
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ENGINEERING
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
D130A
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mutant in KH-like motif, pyocyanin production 0.2 mg/l compared with 6.2 mg/l for wild-type
D178A
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active site mutant, pyocyanin production 0.1 mg/l compared with 6.2 mg/l for wild-type
D73A
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active site mutant, pyocyanin production 4.1 mg/l compared with 6.2 mg/l for wild-type
E182A
F195A
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active site mutant, pyocyanin production 0.8 mg/l compared with 6.2 mg/l for wild-type
F276A
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active site mutant, pyocyanin production 0.1 mg/l compared with 6.2 mg/l for wild-type
H159A
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active site mutant, pyocyanin production 0.1 mg/l compared with 6.2 mg/l for wild-type
H221A
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active site mutant, pyocyanin production 1.1 mg/l compared with 6.2 mg/l for wild-type
H282A
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C-terminal alpha-helix mutant, pyocyanin production 0.4 mg/l compared with 6.2 mg/l for wild-type
H69A
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active site mutant, pyocyanin production 0.1 mg/l compared with 6.2 mg/l for wild-type
H71A
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active site mutant, pyocyanin production 2.7 mg/l compared with 6.2 mg/l for wild-type
H74A
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active site mutant, pyocyanin production 3.5 mg/l compared with 6.2 mg/l for wild-type
K101A
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mutant in KH-like motif, pyocyanin production 4.4 mg/l compared with 6.2 mg/l for wild-type
L193A
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active site mutant, pyocyanin production 4.7 mg/l compared with 6.2 mg/l for wild-type
L248A
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C-terminal alpha-helix mutant, pyocyanin production 4.1 mg/l compared with 6.2 mg/l for wild-type
L261A
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C-terminal alpha-helix mutant, pyocyanin production 0.2 mg/l compared with 6.2 mg/l for wild-type
L277A
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active site mutant, pyocyanin production 4.5 mg/l compared with 6.2 mg/l for wild-type
L290A
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C-terminal alpha-helix mutant, pyocyanin production 0.1 mg/l compared with 6.2 mg/l for wild-type
M286A
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C-terminal alpha-helix mutant, pyocyanin production 0.1 mg/l compared with 6.2 mg/l for wild-type
Q272A
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active site mutant, pyocyanin production 1.4 mg/l compared with 6.2 mg/l for wild-type
R107A
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mutant in KH-like motif, pyocyanin production 4.0 mg/l compared with 6.2 mg/l for wild-type
R111A
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mutant in KH-like motif, pyocyanin production 0.3 mg/l compared with 6.2 mg/l for wild-type
R288A
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active site mutant, pyocyanin production 5.2 mg/l compared with 6.2 mg/l for wild-type
R95A
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mutant in KH-like motif, pyocyanin production 5.1 mg/l compared with 6.2 mg/l for wild-type
S273A
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active site mutant, pyocyanin production 0.1 mg/l compared with 6.2 mg/l for wild-type
S285A
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active site mutant, pyocyanin production 5.0 mg/l compared with 6.2 mg/l for wild-type
S285W
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active site mutant, pyocyanin production 5.6 mg/l compared with 6.2 mg/l for wild-type
W269A
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C-terminal alpha-helix mutant, pyocyanin production 0.1 mg/l compared with 6.2 mg/l for wild-type
E182A
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significant decrease in kcat value for S-(4-nitrobenzoyl)mercaptoethane
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D130A
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mutant in KH-like motif, pyocyanin production 0.2 mg/l compared with 6.2 mg/l for wild-type
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H221A
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active site mutant, pyocyanin production 1.1 mg/l compared with 6.2 mg/l for wild-type
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H69A
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active site mutant, pyocyanin production 0.1 mg/l compared with 6.2 mg/l for wild-type
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H74A
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active site mutant, pyocyanin production 3.5 mg/l compared with 6.2 mg/l for wild-type
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R288A
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active site mutant, pyocyanin production 5.2 mg/l compared with 6.2 mg/l for wild-type
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E182A
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significant decrease in kcat value for S-(4-nitrobenzoyl)mercaptoethane
E182A
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active site mutant, pyocyanin production 1.2 mg/l compared with 6.2 mg/l for wild-type
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LINKS TO OTHER DATABASES (specific for EC-Number 3.1.2.32)
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