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XB-ART-14237
FEBS Lett 1998 Aug 21;4333:219-22.
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Purification and characterization of leukotriene A4 hydrolase from Xenopus laevis oocytes.

Strömberg-Kull F , Haeggström JZ .


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In mammals, leukotriene A4 hydrolase converts leukotriene A4 into the proinflammatory mediator leukotriene B4. We have purified and characterized a non-mammalian leukotriene A4 hydrolase from Xenopus laevis oocytes. This enzyme contains one zinc atom and catalyzes an anion-dependent peptidase activity, two key features of the mammalian enzymes. The amino acid sequence of an internal segment is 60% identical with human leukotriene A4 hydrolase but only 27% identical with rat aminopeptidase B. The Xenopus laevis enzyme is catalytically very efficient and, unlike the human enzyme, converts leukotriene A4 into two enzymatic metabolites, viz. leukotriene B4 and delta6-trans-delta8-cis-leukotriene B4.

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