Title : Inhibition of human mitochondrial aldehyde dehydrogenase by 4-hydroxynon-2-enal and 4-oxonon-2-enal.

Pub. Date : 2006 Jan

PMID : 16411662






6 Functional Relationships(s)
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1 The goal of this work was to determine whether 4ONE is a substrate or inhibitor of human ALDH2 (hALDH2) and elucidate the mechanism of enzyme inhibition by 4HNE and 4ONE. 4-oxo-2-nonenal aldehyde dehydrogenase 2 family member Homo sapiens
2 The goal of this work was to determine whether 4ONE is a substrate or inhibitor of human ALDH2 (hALDH2) and elucidate the mechanism of enzyme inhibition by 4HNE and 4ONE. 4-oxo-2-nonenal aldehyde dehydrogenase 2 family member Homo sapiens
3 At low concentrations of 4ONE (< or = 10 microM), hALDH2 catalyzed the oxidation of 4ONE to 4-oxonon-2-enoic acid (4ONEA) with a maximal yield of 5.2 mol 4ONEA produced per mol of enzyme (monomer). 4-oxo-2-nonenal aldehyde dehydrogenase 2 family member Homo sapiens
4 At low concentrations of 4ONE (< or = 10 microM), hALDH2 catalyzed the oxidation of 4ONE to 4-oxonon-2-enoic acid (4ONEA) with a maximal yield of 5.2 mol 4ONEA produced per mol of enzyme (monomer). 4-oxo-2-nonenal aldehyde dehydrogenase 2 family member Homo sapiens
5 However, subsequent analysis of hALDH2 activity toward propionaldehyde revealed that both 4ONE and the oxidation product, 4ONEA, were potent, irreversible inhibitors of the enzyme. 4-oxo-2-nonenal aldehyde dehydrogenase 2 family member Homo sapiens
6 These data demonstrate that hALDH2 catalyzes the oxidation of 4ONE to 4ONEA; however, the product 4ONEA is a reactive electrophile. 4-oxo-2-nonenal aldehyde dehydrogenase 2 family member Homo sapiens