PMID- 18554159 OWN - NLM STAT- MEDLINE DCOM- 20080916 LR - 20211020 IS - 1557-7430 (Electronic) IS - 1044-5498 (Print) IS - 1044-5498 (Linking) VI - 27 IP - 9 DP - 2008 Sep TI - Soluble epoxide hydrolase homologs in Strongylocentrotus purpuratus suggest a gene duplication event and subsequent divergence. PG - 467-77 LID - 10.1089/dna.2008.0751 [doi] AB - The mammalian soluble epoxide hydrolase (sEH) is a multidomain enzyme composed of C- and N-terminal regions that contain active sites for epoxide hydrolase (EH) and phosphatase activities, respectively. We report the cloning of two 60 kDa multidomain enzymes from the purple sea urchin Strongylocentrotus purpuratus displaying significant sequence similarity to both the N- and C-terminal domains of the mammalian sEH. While one urchin enzyme did not exhibit EH activity, the second enzyme hydrolyzed several lipid messenger molecules metabolized by the mammalian sEH, including the epoxyeicosatrienoic acids. Neither of the urchin enzymes displayed phosphatase activity. The urchin EH was inhibited by small molecule inhibitors of the mammalian sEH and is the likely ancestor of the enzyme. Sequence comparisons suggest that the urchin sEH homologs are the result of a gene fusion event between a gene encoding for an EH and a gene for an enzyme of undetermined function. This fusion event was followed by a duplication event to produce the urchin enzymes. FAU - Harris, Todd R AU - Harris TR AD - Department of Entomology and Cancer Research Center, University of California, Davis, California 95616, USA. FAU - Aronov, Pavel A AU - Aronov PA FAU - Hammock, Bruce D AU - Hammock BD LA - eng GR - T32 ES007059/ES/NIEHS NIH HHS/United States GR - R37 ES002710-27/ES/NIEHS NIH HHS/United States GR - P42 ES004699/ES/NIEHS NIH HHS/United States GR - P42 ES004699-22/ES/NIEHS NIH HHS/United States GR - R37 ES02710/ES/NIEHS NIH HHS/United States GR - T32 ES007059-21/ES/NIEHS NIH HHS/United States GR - R37 ES002710/ES/NIEHS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PL - United States TA - DNA Cell Biol JT - DNA and cell biology JID - 9004522 RN - 0 (Enzyme Inhibitors) RN - EC 3.3.2.- (Epoxide Hydrolases) SB - IM MH - Amino Acid Sequence MH - Animals MH - Base Sequence MH - Cloning, Molecular MH - Enzyme Inhibitors/chemistry/pharmacology MH - Epoxide Hydrolases/antagonists & inhibitors/chemistry/*genetics MH - Evolution, Molecular MH - Gene Duplication MH - Molecular Sequence Data MH - Sequence Alignment MH - Strongylocentrotus purpuratus/*enzymology/*genetics PMC - PMC2858585 MID - NIHMS193790 EDAT- 2008/06/17 09:00 MHDA- 2008/09/17 09:00 PMCR- 2009/09/01 CRDT- 2008/06/17 09:00 PHST- 2008/06/17 09:00 [pubmed] PHST- 2008/09/17 09:00 [medline] PHST- 2008/06/17 09:00 [entrez] PHST- 2009/09/01 00:00 [pmc-release] AID - 10.1089/dna.2008.0751 [pii] AID - 10.1089/dna.2008.0751 [doi] PST - ppublish SO - DNA Cell Biol. 2008 Sep;27(9):467-77. doi: 10.1089/dna.2008.0751.