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Information on EC 3.3.2.9 - microsomal epoxide hydrolase

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EC Tree
     3 Hydrolases
         3.3 Acting on ether bonds
             3.3.2 Ether hydrolases
                3.3.2.9 microsomal epoxide hydrolase
IUBMB Comments
This is a key hepatic enzyme that catalyses the hydrolytic ring opening of oxiranes (epoxides) and oxetanes to give the corresponding diols. The enzyme is involved in the metabolism of numerous substrates including the stereoselective hydrolytic ring opening of 7-oxabicyclo[4.1.0]hepta-2,4-dienes (arene oxides) to the corresponding trans-dihydrodiols. The reaction proceeds via a triad mechanism and involves the formation of an hydroxyalkyl-enzyme intermediate. Five epoxide-hydrolase enzymes have been identified in vertebrates to date: EC 3.3.2.6 (leukotriene-A4 hydrolase), EC 3.3.2.7 (hepoxilin-epoxide hydrolase), EC 3.3.2.9 (microsomal epoxide hydrolase), EC 3.3.2.10 (soluble epoxide hydrolase) and EC 3.3.2.11 (cholesterol-5,6-oxide hydrolase).
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The expected taxonomic range for this enzyme is: Eukaryota, Bacteria
Synonyms
E1-b', EC 3.3.2.3, Eha, EHb, EPHX 1, EPHX1, JH epoxide hydrolase, JHEH, juvenile hormone epoxide hydrolase, mEH, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
1-(4-methoxyphenyl)-N-methyl-N-[(3-methyloxetan-3-yl)methyl]methanamine + H2O = 2-({[(4-methoxyphenyl)methyl](methyl)amino}methyl)-2-methylpropane-1,3-diol
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(2)
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cis-stilbene oxide + H2O = (1R,2R)-1,2-diphenylethane-1,2-diol
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PATHWAY SOURCE
PATHWAYS