A novel NADPH/NADH-dependent aldehyde reduction enzyme isolated from the tapeworm Moniezia expansa |
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| Authors: | P M Brophy P Crowley J Barrett |
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| Institution: | Department of Biological Science, University College of Wales, Aberystwyth, UK. |
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| Abstract: | An aldehyde reduction enzyme has been purified from the cytosol of the tapeworm, Moniezia expansa, by chromatofocusing and Reactive-Red chromatography. The enzyme is monomeric (subunit 34 kDa) and can utilise NADH and NADPH as co-factors. Substrates of the enzyme include alkanals, alka-2,4-dienals and alk-2-enals, established secondary products of lipid peroxidation. The enzyme reduced methylglyoxal, another possible natural substrate (M. expansa lacks glyoxalase I activity). The parasite enzyme may help form a final line of defence against cytotoxic aldehydes arising from host immune initiated lipid peroxidation. |
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