Page last updated: 2024-10-24

hepoxilin-epoxide hydrolase activity

Definition

Target type: molecularfunction

Catalysis of the reaction: (5Z,9E,14Z)-(8x,11R,12S)-11,12-epoxy-8-hydroxyicosa-5,9,14-trienoate + H2O = (5Z,9E,14Z)-(8x,11x,12S)-8,11,12-trihydroxyicosa-5,9,14-trienoate. [EC:3.3.2.7, MetaCyc:HEPOXILIN-EPOXIDE-HYDROLASE-RXN]

Hepoxilin-epoxide hydrolase (HEH) activity is a key enzyme involved in the metabolism of hepoxilins, bioactive lipid mediators derived from arachidonic acid. These mediators play diverse roles in various physiological processes, including inflammation, vascular tone regulation, and wound healing. HEH catalyzes the hydrolysis of the epoxide ring in hepoxilins, generating the corresponding diols. This hydrolytic reaction converts biologically active hepoxilins into inactive products, effectively terminating their signaling pathways. The specific mechanism of HEH action involves the nucleophilic attack of water on the epoxide ring, facilitated by the enzyme's catalytic residues. This process results in the opening of the epoxide ring and the formation of a diol group. HEH's activity is essential for regulating hepoxilin levels and ensuring proper physiological function. Its expression and activity are tightly controlled, ensuring appropriate responses to diverse stimuli. Dysregulation of HEH activity can lead to imbalances in hepoxilin levels and contribute to various pathological conditions. For instance, reduced HEH activity has been implicated in inflammatory processes, while elevated activity might contribute to the suppression of inflammatory responses. HEH's role in modulating hepoxilin signaling highlights its importance in maintaining cellular homeostasis and regulating key physiological processes. Further research on HEH and its substrates will provide deeper insights into its diverse roles in health and disease.'
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Proteins (1)

ProteinDefinitionTaxonomy
Polyunsaturated fatty acid lipoxygenase ALOX12A polyunsaturated fatty acid lipoxygenase ALOX12 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P18054]Homo sapiens (human)

Compounds (41)

CompoundDefinitionClassesRoles
chloroxinechloroxine : A monohydroxyquinoline that is quinolin-8-ol in which the hydrogens at positions 5 and 7 have been substituted by chlorine. A synthetic antibacterial prepared by chlorination of quinolin-8-ol, it is used for the treatment of dandruff and seborrhoeic dermatitis of the scalp.monohydroxyquinoline;
organochlorine compound
antibacterial agent;
antifungal drug;
antiseborrheic
hexylresorcinolresorcinols
4-(dimethylamino)-n-(7-(hydroxyamino)-7-oxoheptyl)benzamide4-(dimethylamino)-N-(7-(hydroxyamino)-7-oxoheptyl)benzamide: structure in first source

4-(dimethylamino)-N-[7-(hydroxyamino)-7-oxoheptyl]benzamide : A benzamide resulting from the formal condensation of the carboxy group of 4-(dimethylamino)benzoic acid with the amino group of 7-amino-N-hydroxyheptanamide. It is a potent inhibitor of histone deacetylases and induces cell cycle arrest and apoptosis in several human cancer cell lines.
benzamides;
hydroxamic acid;
secondary carboxamide;
tertiary amino compound
antineoplastic agent;
apoptosis inducer;
EC 3.5.1.98 (histone deacetylase) inhibitor
masoprocolnordihydroguaretic acid: antioxidant compound found in the creosote bush (Larrea tridentata)catechols;
lignan;
tetrol
antioxidant;
ferroptosis inhibitor;
geroprotector;
plant metabolite
vorinostatvorinostat : A dicarboxylic acid diamide comprising suberic (octanedioic) acid coupled to aniline and hydroxylamine. A histone deacetylase inhibitor, it is marketed under the name Zolinza for the treatment of cutaneous T cell lymphoma (CTCL).

Vorinostat: A hydroxamic acid and anilide derivative that acts as a HISTONE DEACETYLASE inhibitor. It is used in the treatment of CUTANEOUS T-CELL LYMPHOMA and SEZARY SYNDROME.
dicarboxylic acid diamide;
hydroxamic acid
antineoplastic agent;
apoptosis inducer;
EC 3.5.1.98 (histone deacetylase) inhibitor
tetrabromobisphenol a3,3',5,5'-tetrabromobisphenol A : A bromobisphenol that is 4,4'-methanediyldiphenol in which the methylene hydrogens are replaced by two methyl groups and the phenyl rings are substituted by bromo groups at positions 2, 2', 6 and 6'. It is a brominated flame retardant.

tetrabromobisphenol A: a brominated flame retardant
brominated flame retardant;
bromobisphenol
phenidonephenidone: photographic developer; RN given refers to parent cpd; structure
2-bromophenolbromophenol : A halophenol that is any phenol containing one or more covalently bonded bromine atoms.bromophenolmarine metabolite
4-bromophenol4-bromophenol : A bromophenol containing only hydroxy and bromo substituents that are para to one another.bromophenolhuman urinary metabolite;
human xenobiotic metabolite;
marine metabolite;
mouse metabolite;
persistent organic pollutant;
rat metabolite
3-hydroxyflavone3-hydroxyflavone: structure given in first source

flavonol : A monohydroxyflavone that is the 3-hydroxy derivative of flavone.
flavonols;
monohydroxyflavone
3-bromophenol
2,6-dibromophenol2,6-dibromophenol : A dibromophenol that is phenol in which both of the hydrogens that are ortho to the phenolic hydroxy group have been replaced by bromines.bromohydrocarbon;
dibromophenol
marine metabolite
2,4-dibromophenol2,4-dibromophenol : A bromophenol that is phenol in which the hydrogens at positions 2 and 4 have been replaced by bromines.brominated flame retardant;
bromophenol;
dibromobenzene
marine metabolite
zileuton1-benzothiophenes;
ureas
anti-asthmatic drug;
EC 1.13.11.34 (arachidonate 5-lipoxygenase) inhibitor;
ferroptosis inhibitor;
leukotriene antagonist;
non-steroidal anti-inflammatory drug
6-hydroxyflavone6-hydroxyflavone: antioxidant; structure in first sourcehydroxyflavonoid
puupehenone
moracin cbenzofurans
3,6-dihydroxyflavone3,6-dihydroxyflavone: induces apoptosis in leukemia HL-60 cells; structure in first source
N-[(5-chloro-8-hydroxy-7-quinolinyl)-(2-furanyl)methyl]acetamidehydroxyquinoline
1-phenyl-2-[[4-(trifluoromethyl)phenyl]methylthio]imidazoleimidazoles
quercetin7-hydroxyflavonol;
pentahydroxyflavone
antibacterial agent;
antineoplastic agent;
antioxidant;
Aurora kinase inhibitor;
chelator;
EC 1.10.99.2 [ribosyldihydronicotinamide dehydrogenase (quinone)] inhibitor;
geroprotector;
phytoestrogen;
plant metabolite;
protein kinase inhibitor;
radical scavenger
15-keto-5,8,11,13-eicosatetraenoic acid15-keto-5,8,11,13-eicosatetraenoic acid: RN given refers to (E,Z,Z,Z)-isomer; RN for cpd without isomeric designation not available 3/88

15-oxo-ETE : An oxoicosatetraenoic acid having (5Z,8Z,11Z,13E) double bond stereochemistry, and an oxo group in position 15.
oxoicosatetraenoic acidhuman metabolite
baicaleintrihydroxyflavoneangiogenesis inhibitor;
anti-inflammatory agent;
antibacterial agent;
anticoronaviral agent;
antifungal agent;
antineoplastic agent;
antioxidant;
apoptosis inducer;
EC 1.13.11.31 (arachidonate 12-lipoxygenase) inhibitor;
EC 1.13.11.33 (arachidonate 15-lipoxygenase) inhibitor;
EC 3.4.21.26 (prolyl oligopeptidase) inhibitor;
EC 3.4.22.69 (SARS coronavirus main proteinase) inhibitor;
EC 4.1.1.17 (ornithine decarboxylase) inhibitor;
ferroptosis inhibitor;
geroprotector;
hormone antagonist;
plant metabolite;
prostaglandin antagonist;
radical scavenger
fisetin3'-hydroxyflavonoid;
7-hydroxyflavonol;
tetrahydroxyflavone
anti-inflammatory agent;
antioxidant;
EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor;
geroprotector;
metabolite;
plant metabolite
mangostinalpha-mangostin : A member of the class of xanthones that is 9H-xanthene substituted by hydroxy group at positions 1, 3 and 6, a methoxy group at position 7, an oxo group at position 9 and prenyl groups at positions 2 and 8. Isolated from the stems of Cratoxylum cochinchinense, it exhibits antioxidant, antimicrobial and antitumour activities.

mangostin: xanthone from rind of Garcinia mangostana Linn. fruit
aromatic ether;
phenols;
xanthones
antimicrobial agent;
antineoplastic agent;
antioxidant;
plant metabolite
morusinmorusin : An extended flavonoid that is flavone substituted by hydroxy groups at positions 5, 2' and 4', a prenyl group at position 3 and a 2,2-dimethyl pyran group across positions 7 and 8.

morusin: from Morus root bark; structure given in first source
extended flavonoid;
trihydroxyflavone
antineoplastic agent;
plant metabolite
daidzein7-hydroxyisoflavonesantineoplastic agent;
EC 2.7.7.7 (DNA-directed DNA polymerase) inhibitor;
EC 3.2.1.20 (alpha-glucosidase) inhibitor;
phytoestrogen;
plant metabolite
7-hydroxyflavone7-hydroxyflavone : A hydroxyflavonoid in which the flavone nucleus is substituted at position 7 by a hydroxy group.hydroxyflavonoid
5-oxo-6,8,11,14-eicosatetraenoic acid5-ketoeicosatetraenoic acid: a nonenzymatic rearrangement product of leukotriene A4; structure given in first source

5-oxo-ETE : An oxoicosatetraenoic acid having a 5-oxo group; and (6E)-, (8Z), (11Z)- and (14Z)-double bonds.
oxoicosatetraenoic acidhuman metabolite;
immunomodulator;
mouse metabolite
6,7,4'-trihydroxyisoflavone4',6,7-trihydroxyisoflavone : A hydroxyisoflavone that is daidzein bearing an additional hydroxy substituent at position 6.

6,7,4'-trihydroxyisoflavone: structure in first source
7-hydroxyisoflavonesanti-inflammatory agent;
antimutagen;
EC 1.14.18.1 (tyrosinase) inhibitor;
metabolite;
PPARalpha agonist;
PPARgamma agonist
7-hydroxyisoflavone7-hydroxyisoflavone : The simplest member of the class of 7-hydroxyisoflavones that is isoflavone with a hydroxy substituent at position 7.

7-hydroxyisoflavone: effective against, Enterovirus 71; structure in first source
7-hydroxyisoflavonesEC 1.14.14.14 (aromatase) inhibitor;
metabolite
3,7-dihydroxyflavone3,7-dihydroxyflavone: structure in first source

7-hydroxyflavonol : Any flavonol carrying a 7-hydroxy substituent.
hydroxyflavan
13-oxo-9,11-octadecadienoic acid13-oxo-9Z,11E-ODE : An oxooctadecadienoic acid that consists of 9Z,11E-octadecadienoic acid bearing an additional 13-keto substituent. In addtion it has been found as a natural product found in Carthamus oxyacantha.13-oxo-9,11-octadecadienoic acidmetabolite;
mouse metabolite
dysidenindysidenin : A secondary carboxamide resulting from the formal condensation of the carboxy group of (4S)-5,5,5-trichloro-N-methyl-N-[(3S)-4,4,4-trichloro-3-methylbutanoyl]-L-leucine with the amino group of (1S)-1-(1,3-thiazol-2-yl)ethanamine. It is a marine metabolite initially isolated from the sponge dysidea herbacea.

dysidenin: structure given in first source; from the sponge Dysidea herbacea; RN given refers to (2S-(N(R*),2R*(R*),4R*))-isomer; RN for cpd without isomeric designation not avail 5/90
1,3-thiazoles;
organochlorine compound;
secondary carboxamide;
tertiary carboxamide
animal metabolite;
marine metabolite;
toxin
jaspaquinoljaspaquinol: structure in first source
N-[(5-chloro-8-hydroxy-7-quinolinyl)-cyclopropylmethyl]acetamidehydroxyquinoline
N-[(5-fluoro-8-hydroxy-7-quinolinyl)-thiophen-2-ylmethyl]acetamidehydroxyquinoline
N-[(5-bromo-8-hydroxy-7-quinolinyl)-(2-furanyl)methyl]propanamidehydroxyquinoline
N-[(5-bromo-8-hydroxy-7-quinolinyl)-thiophen-2-ylmethyl]acetamidehydroxyquinoline
ML355ML355 : A sulfonamide resulting from the formal condensation of the amino group of 2-aminobenzothiazole with the sulfo group of 4-[(2-hydroxy-3-methoxybenzyl)amino]benzenesulfonic acid. It is an inhibitor of 12-lipoxygenase, being developed by Veralox Therapeutics for the treatment of heparin-induced thrombocytopenia and thrombosis.

ML355: 12-Lipoxygenase inhibitor
benzothiazoles;
monomethoxybenzene;
phenols;
secondary amino compound;
substituted aniline;
sulfonamide
EC 1.13.11.31 (arachidonate 12-lipoxygenase) inhibitor;
platelet aggregation inhibitor
hydrazinocurcuminhydrazinocurcumin : A pyrazole obtained by cyclocodensation of the two carbonyl groups of curcumin with hydrazine.

hydrazinocurcumin: structure in first source
aromatic ether;
olefinic compound;
polyphenol;
pyrazoles
angiogenesis modulating agent;
antineoplastic agent;
EC 2.3.1.48 (histone acetyltransferase) inhibitor;
EC 2.7.11.1 (non-specific serine/threonine protein kinase) inhibitor