Information on EC 2.3.1.261 - (4-hydroxyphenyl)alkanoate synthase

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The expected taxonomic range for this enzyme is: Mycobacterium tuberculosis complex

EC NUMBER
COMMENTARY hide
2.3.1.261
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RECOMMENDED NAME
GeneOntology No.
(4-hydroxyphenyl)alkanoate synthase
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REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
4-hydroxybenzoyl-[(4-hydroxyphenyl)alkanoate synthase] + 8 malonyl-CoA + 16 NADPH + 16 H+ = 17-(4-hydroxyphenyl)heptadecanoyl-[(4-hydroxyphenyl)alkanoate synthase] + 8 CO2 + 8 CoA + 16 NADP+ + 8 H2O
show the reaction diagram
(1)
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4-hydroxybenzoyl-[(4-hydroxyphenyl)alkanoate synthase] + 9 malonyl-CoA + 18 NADPH + 18 H+ + holo-[(4-hydroxyphenyl)alkanoate synthase] = 19-(4-hydroxyphenyl)nonadecanoyl-[(4-hydroxyphenyl)alkanoate synthase] + 9 CO2 + 9 CoA + 18 NADP+ + 9 H2O
show the reaction diagram
(2)
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PATHWAY
BRENDA Link
KEGG Link
MetaCyc Link
phenolphthiocerol biosynthesis
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SYSTEMATIC NAME
IUBMB Comments
malonyl-CoA:4-hydroxybenzoyl-[(4-hydroxyphenyl)alkanoate synthase] malonyltransferase [(4-hydroxyphenyl)alkanoate-forming]
The enzyme is part of the biosynthetic pathway of phenolphthiocerol, a lipid that serves as a virulence factor of pathogenic mycobacteria. It catalyses the elongation of 4-hydroxybenzoate that is loaded on its acyl-carrier domain to form (4-hydroxyphenyl)alkanoate intermediates. The enzyme adds either 8 or 9 malonyl-CoA units, resulting in formation of 17-(4-hydroxyphenyl)heptadecanoate or 19-(4-hydroxyphenyl)nonadecanoate, respectively. As the enzyme lacks a thioesterase domain [1], the product remains loaded on the acyl-carrier domain at the end of catalysis, and has to be hydrolysed by an as-yet unknown mechanism.
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
4-hydroxybenzoyl-[4-hydroxyphenylalkanoate synthase] + 8 malonyl-CoA + 16 NADPH + 16 H+
17-(4-hydroxyphenyl)heptadecanoyl-[4-hydroxyphenylalkanoate synthase] + 8 CO2 + 8 CoA + 16 NADP+ + 8 H2O
show the reaction diagram
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-
-
?
4-hydroxybenzoyl-[4-hydroxyphenylalkanoate synthase] + 9 malonyl-CoA + 18 NADPH + 18 H+ + holo-[4-hydroxyphenylalkanoate synthase]
19-(4-hydroxyphenyl)nonadecanoyl-[4-hydroxyphenylalkanoate synthase] + 9 CO2 + 9 CoA + 18 NADP+ + 9 H2O
show the reaction diagram
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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
4-hydroxybenzoyl-[4-hydroxyphenylalkanoate synthase] + 8 malonyl-CoA + 16 NADPH + 16 H+
17-(4-hydroxyphenyl)heptadecanoyl-[4-hydroxyphenylalkanoate synthase] + 8 CO2 + 8 CoA + 16 NADP+ + 8 H2O
show the reaction diagram
P96284
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-
-
?
4-hydroxybenzoyl-[4-hydroxyphenylalkanoate synthase] + 9 malonyl-CoA + 18 NADPH + 18 H+ + holo-[4-hydroxyphenylalkanoate synthase]
19-(4-hydroxyphenyl)nonadecanoyl-[4-hydroxyphenylalkanoate synthase] + 9 CO2 + 9 CoA + 18 NADP+ + 9 H2O
show the reaction diagram
P96284
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?