An epoxide hydrolase from Rhodococcus erythropolis DCL14 catalyzes the hydrolysis of limonene-1,2-epoxide to limonene-1,2-diol. The enzyme is induced when R. erythropolis is grown on monoterpenes, reflecting its role in the limonene degradation pathway of this microorganism. Limonene-1,2-epoxide hydrolase was purified to homogeneity. It is a monomeric cytoplasmic enzyme of 17 kDa, and its N-ter...

We have utilized a DNA clone complementary to epoxide hydrolase mRNA as a probe to examine the level of the mRNA in persistent hepatocyte nodules and hepatomas induced by the Solt-Farber chemical carcinogenesis procedure. Epoxide hydrolase mRNA is increased 14-fold in nodules as compared to the level in normal liver. When rats with liver nodules were administered phenobarbital, an inducer of ep...

Mammalian soluble and microsomal epoxide hydrolases have been proposed to belong to the family of alpha/beta-hydrolase-fold enzymes. These enzymes hydrolyse their substrates by a catalytic triad, with the first step of the enzymatic reaction being the formation of a covalent enzyme-substrate ester. In the present paper, we describe the direct visualization of the ester formation between rat mic...

Epoxyeicosatrienoic acids are cytochrome P-450 metabolites of arachidonic acid with multiple biological functions, including the regulation of vascular tone, renal tubular transport, cellular proliferation, and inflammation. Epoxyeicosatrienoic acids are converted by soluble epoxide hydrolase into the corresponding dihydroxyeicosatrienoic acids, and epoxyeicosatrienoic acid hydration is regarde...

s for posters:Experimental Biology 2008, San Diego, April 2008IDENTIFICATION OF A NEW POTENTIAL HUMAN EPOXIDE HYDROLASE(NEH2)Martina Decker, Magdalena Adamska, Michael Arand. Leopoldina Symposium of Lipid Signaling, Frankfurt, September 2008CHARACTERIZATION OF A NOVEL HUMAN EPOXIDE HYDROLASE (EH3)CAPABLE OF CONVERTING EPOXYEICOSATRIENOIC ACIDS (EETS)Martina Decker, M...

Epoxide hydrolases play an important role in the biodegradation of organic compounds and are potentially useful in enantioselective biocatalysis. An analysis of various genomic databases revealed that about 20% of sequenced organisms contain one or more putative epoxide hydrolase genes. They were found in all domains of life, and many fungi and actinobacteria contain several putative epoxide hy...

The advent of multikinase inhibitors targeting the vascular endothelial growth factor (VEGF) receptor has revolutionized the treatment of highly angiogenic malignancies such as renal cell carcinoma. Interestingly, several such inhibitors are commercially available, and they each possess diverse specific beneficial and adverse effect profiles. In examining the structure of sorafenib, it was hypo...

The epoxide hydrolase activities of the 100,000 g pellet (microsomal) and 100,00 g soluble (cystosolic) fractions of mouse, rat, and guinea pig liver were measured with three closely related compounds used as substrates. Differences between the species in the distribution of the cytosolic and microsomal hydrolases and in their substrate specificities and pH optima demonstrate why epoxide hydrol...

The potential of polycyclic aromatic hydrocarbons (PAHs) to modulate microsomal epoxide hydrolase activity, determined using benzo[a]pyrene 5-oxide as substrate, in human liver, was evaluated and compared to rat liver. Precision-cut liver slices prepared from fresh human liver were incubated with six structurally diverse PAHs, at a range of concentrations, for 24h. Of the six PAHs studied, benz...

A clofibrate-induced mouse liver cDNA library was prepared and used to isolate the coding sequence for soluble epoxide hydrolase. A 1668-base pair (bp) clone was isolated and found to contain a 1269-bp open reading frame coding for 423 amino acids. Subsequent RNA polymerase chain reaction resulted in the isolation of 396 bp of additional 5'-sequence. Translation of the resulting 1659-bp open re...