Search results for "valpromide"

showing 3 items of 3 documents

Interaction of valproic acid and some analogues with microsomal epoxide hydrolase.

1992

Abstract Valproic acid (VPA) and its analogues valpromide (VPM), valproyl-Coenzyme A (VP-CoA) and valproyl-ethylester (VPE) were examined as potential inhibitors of microsomal epoxide hydrolase (mEHb) using styrene-7,8-oxide (STO) and benzo(a)pyrene-4,5-oxide (BPO) as enzyme substrates. The effect of each potential inhibitor was examined using mEHb from rat liver, human livers (from a child, woman and man) and from human placenta. Of the compounds tested, only VPM (2 mM) expressed significant inhibition of mEHb activity with a maximum inhibition of 49%, 48%, 35% and 33% for liver microsomes from the child, woman, man and rat, respectively, using STO (2 mM) as substrate. Human placenta mEHb …

ValpromideAdultMalePharmacologyBiochemistrymedicineAnimalsHumansEpoxide hydrolasePharmacologychemistry.chemical_classificationEpoxide HydrolasesBinding SitesbiologyDose-Response Relationship DrugValproic AcidRats Inbred StrainsMiddle Agedbiology.organism_classificationRatsKineticsEnzymeBiochemistryMicrosomachemistryMechanism of actionEnzyme inhibitorMicrosomal epoxide hydrolaseChild PreschoolMicrosomebiology.proteinMicrosomes LiverFemalemedicine.symptommedicine.drugBiochemical pharmacology
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Valpromide is a poor inhibitor of the cytosolic epoxide hydrolase

1989

The effect of the antiepileptics valpromide and sodium valproate on the cytosolic epoxide hydrolase was studied in human fetal liver, kidneys and adrenals and from human adult liver and kidneys. Trans-stilbene oxide was used as substrate. Valpromide (10 mM) lowered the activity of the epoxide hydrolase to one half of the control in all organs studied. Sodium valproate (10 mM) was less powerful as an inhibitor than valpromide; however, it exerted a significant inhibition in all tissues studied.

Valpromidemedicine.medical_specialtyHealth Toxicology and Mutagenesismedicine.medical_treatmentSodiumchemistry.chemical_elementIn Vitro TechniquesBiologyToxicologyCytosolFetusPregnancyInternal medicineStilbenesmedicineHumansEpoxide hydrolaseEpoxide HydrolasesKidneyValproic AcidGeneral MedicineCytosolAnticonvulsantEndocrinologymedicine.anatomical_structureLiverchemistryEnzyme inhibitorToxicitybiology.proteinAnticonvulsantsFemalemedicine.drugArchives of Toxicology
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Structure of Rhodococcus erythropolis limonene-1,2-epoxide hydrolase reveals a novel active site

2003

Epoxide hydrolases are essential for the processing of epoxide-containing compounds in detoxification or metabolism. The classic epoxide hydrolases have an alpha/beta hydrolase fold and act via a two-step reaction mechanism including an enzyme-substrate intermediate. We report here the structure of the limonene-1,2-epoxide hydrolase from Rhodococcus erythropolis, solved using single-wavelength anomalous dispersion from a selenomethionine-substituted protein and refined at 1.2 A resolution. This enzyme represents a completely different structure and a novel one-step mechanism. The fold features a highly curved six-stranded mixed beta-sheet, with four alpha-helices packed onto it to create a …

Models MolecularAFSG Stafafdelingen (WUATV)10050 Institute of Pharmacology and Toxicologydrug protein bindingEnantioselectivityEpoxide hydrolaseCrystallography X-Rayuncultured actinomyceteCatalytic Domain2400 General Immunology and Microbiologyalpha helixRhodococcuscholesterol epoxide hydrolasenaphthalene 12-dioxygenasedcl14limonene 12 epoxide hydrolaseEpoxide hydrolaseBacteria (microorganisms)delta(5)-3-ketosteroid isomeraseEpoxide HydrolasesLimonene-12-epoxide hydrolaseGeneral Neurosciencearticle2800 General NeuroscienceActinobacteria (class)Articlesagrobacterium-radiobacterEnzyme structureRecombinant Proteinsunclassified drugenzyme structurereaction analysisBiochemistrypriority journalenzyme active siteMechanism2-dioxygenaseDimerizationBiotechnologychemical reactioncrystal structureaspergillus-nigermacromolecular structuresStereochemistrybeta sheetvalpromideMolecular Sequence Data610 Medicine & healthGenetics and Molecular BiologyBiologyGeneral Biochemistry Genetics and Molecular BiologyBacterial Proteinssite directed mutagenesis1300 General Biochemistry Genetics and Molecular BiologyHydrolase1312 Molecular BiologyAmino Acid SequencedetoxificationRhodococcus erythropolisBiologyMonoterpene degradationMolecular Biologyprotein data-bankenzyme substrate complexEnzyme substrate complexnonhumancatalysisSequence Homology Amino AcidGeneral Immunology and Microbiologybacterial enzymeActive sitecrystal-structureAFSG Staff Departments (WUATV)enzyme metabolismProtein SubunitsenzymeEpoxide HydrolasesGeneral Biochemistrybiology.proteinMutagenesis Site-Directed570 Life sciences; biologyselenomethioninenaphthalene 1Alpha helix
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