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RESEARCH PRODUCT
An insect juvenile hormone-specific epoxide hydrolase is related to vertebrate microsomal epoxide hydrolases.
Hubert WojtasekGlenn D. Prestwichsubject
DNA ComplementaryMolecular Sequence DataBiophysicsSequence HomologyBiologyBiochemistryPolymerase Chain ReactionMiceOpen Reading FramesComplementary DNAMicrosomesCatalytic triadAnimalsHumansAmino Acid SequenceEpoxide hydrolaseMolecular BiologyPeptide sequenceConserved SequenceEpoxide HydrolasesBase SequenceCell BiologyRatsJuvenile HormonesBiochemistryMicrosomal epoxide hydrolaseEpoxide HydrolasesJuvenile hormoneRabbitsOxyanion holedescription
Abstract We describe the first cDNA sequence encoding a juvenile hormone-specific epoxide hydrolase from an insect. A full-length cDNA clone revealed a 462-amino-acid open reading frame encoding an amino acid sequence with 44% identity and 64% similarity to human microsomal epoxide hydrolase. All residues in the catalytic triad (residues Asp 227 -His 428 -Asp 350 in the M. sexta protein) were present, as was the conserved Trp 154 corresponding to the oxyanion hole. The surprising similarity of insect juvenile hormone epoxide hydrolase to vertebrate microsomal epoxide hydrolases, coupled with the ancient lineage of the epoxide hydrolases and haloalkane dehalogenases, suggests that this catabolic enzyme evolved from an original ubiquitous detoxication function to a more recent role in hormonal regulation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1996-03-01 | Biochemical and biophysical research communications |