Abstract
As a common structural element of invertebrates and fungi, chitin offers an ideal target for bio-control of agricultural pests as well as production of N-acetyl glucosamine (NAG). Therefore, chitin degrading enzymes have several biotechnological applications. In the present investigation, the bio-control and NAG production potential of Myrothecium verrucaria N-acetyl glucosaminidase (MvNAGase) were studied. Cloning and biochemical characterization of MvNAGase (1743 bp) suggest that it belongs to the glycosyl hydrolase-20 family. Chitooligosaccharides hydrolysis revealed the exo-acting nature of the enzyme with NAG as an end product. rMvNAGase displayed significant antifungal potential towards plant pathogenic fungi: Ustilago maydis, Bipolaris sorokiniana and Fusarium oxysporum. The bioprocess was optimized using an enzymic cocktail of earlier identified and characterized endo-chitinase and rMvNAGase to maximize NAG production from the chitin. Under specific experimental conditions, the chitin conversion was achieved up to 87%. The study propose the possible application of rMvNAGase in bio-control of agricultural pests and biochemical production of NAG from the crude chitin.
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