Abstract
Enzymatic inactivation of fungal toxins is an attractive strategy for the decontamination of food and feeding stuff. A constitutively expressed enzyme opening the lactone linkage within the macrocyclic ring system of zearalenone (ZON) was isolated fromGliocladium roseum. The enzyme has been shown to catalyze the transformation of the mycotoxin ZON and therefore has been named ZON degrading enzyme. The resulting products of the enzymatic reaction are less toxic because they have lost their estrogenic capacity. In this study, we used scanning electron microscopy to evaluate the possible mycoparasitism betweenFusarium graminearum andG. roseum. The ZON-degrading enzyme could be isolated fromG. roseum cultures and biochemically characterized. It has been found to be similar to superoxide-dismutases at its N-teminus.
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