PMID- 16322563 OWN - NLM STAT- MEDLINE DCOM- 20060323 LR - 20181220 IS - 0961-8368 (Print) IS - 1469-896X (Electronic) IS - 0961-8368 (Linking) VI - 15 IP - 1 DP - 2006 Jan TI - Human soluble epoxide hydrolase: structural basis of inhibition by 4-(3-cyclohexylureido)-carboxylic acids. PG - 58-64 AB - X-ray crystal structures of human soluble epoxide hydrolase (sEH) complexed with four different dialkylurea inhibitors bearing pendant carboxylate "tails" of varying length have been determined at 2.3-3.0 A resolution. Similarities among inhibitor binding modes reinforce the proposed roles of Y381 and/or Y465 as general acids that protonate the epoxide ring of the substrate in concert with nucleophilic attack of D333 at the electrophilic epoxide carbon. Additionally, the binding of these inhibitors allows us to model the binding mode of the endogenous substrate 14,15-epoxyeicosatrienoic acid. Contrasts among inhibitor binding modes include opposite orientations of inhibitor binding in the active-site hydrophobic tunnel. Alternative binding orientations observed for this series of inhibitors to human sEH, as well as the binding of certain dialkylurea inhibitors to human sEH and murine sEH, complicate the structure-based design of human sEH inhibitors with potential pharmaceutical applications in the treatment of hypertension. Thus, with regard to the optimization of inhibitor designs targeting human sEH, it is critical that human sEH and not murine sEH be utilized for inhibitor screening, and it is critical that structures of human sEH-inhibitor complexes be determined to verify inhibitor binding orientations that correlate with measured affinities. FAU - Gomez, German A AU - Gomez GA AD - Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104-6323, USA. FAU - Morisseau, Christophe AU - Morisseau C FAU - Hammock, Bruce D AU - Hammock BD FAU - Christianson, David W AU - Christianson DW LA - eng SI - PDB/1ZD2 SI - PDB/1ZD3 SI - PDB/1ZD4 SI - PDB/1ZD5 GR - GM63106/GM/NIGMS NIH HHS/United States GR - P30 ES05707/ES/NIEHS NIH HHS/United States GR - P30 ES005707/ES/NIEHS NIH HHS/United States GR - P42 ES004699/ES/NIEHS NIH HHS/United States GR - P42 ES04699/ES/NIEHS NIH HHS/United States GR - R01 GM063106/GM/NIGMS NIH HHS/United States GR - R37 ES02710/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 DEP - 20051201 PL - United States TA - Protein Sci JT - Protein science : a publication of the Protein Society JID - 9211750 RN - 0 (Arachidonic Acids) RN - 0 (Carboxylic Acids) RN - 0 (Enzyme Inhibitors) RN - EC 3.3.2.- (Epoxide Hydrolases) SB - IM MH - Animals MH - Arachidonic Acids/chemistry/pharmacology MH - Binding Sites/physiology MH - Carboxylic Acids/*chemistry/pharmacology MH - Crystallography, X-Ray MH - Enzyme Inhibitors/*chemistry MH - Epoxide Hydrolases/*antagonists & inhibitors/*chemistry MH - Humans MH - Mice MH - Models, Molecular MH - Protein Binding/physiology MH - Protein Structure, Tertiary MH - *Quantitative Structure-Activity Relationship MH - Solubility PMC - PMC1762130 MID - NIHMS7956 EDAT- 2005/12/03 09:00 MHDA- 2006/03/24 09:00 PMCR- 2007/01/01 CRDT- 2005/12/03 09:00 PHST- 2005/12/03 09:00 [pubmed] PHST- 2006/03/24 09:00 [medline] PHST- 2005/12/03 09:00 [entrez] PHST- 2007/01/01 00:00 [pmc-release] AID - ps.051720206 [pii] AID - 0150058 [pii] AID - 10.1110/ps.051720206 [doi] PST - ppublish SO - Protein Sci. 2006 Jan;15(1):58-64. doi: 10.1110/ps.051720206. Epub 2005 Dec 1.