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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/304

Title: Biosynthesis of xylanolytic and xylan-debranching enzymes in Melanocarpus albomyces IIS 68
Authors: Saraswat, Vibhor
Bisariab, Virendra S
Keywords: xylanase
B-xylosidase
acetyl esterase
A-L-arabinofuranosidase
a-d-glucuronidase
Melanocarpus albomyces
Issue Date: 1997
Citation: Journal of Fermentation and Bioengineering, 83(4), 352-357
Abstract: Melanocarpus albomyces IIS 68 synthesizes xylanase, ,&xylosidase and xylan debranching enzymes, namely, acetyl esterase, a+arabinofuranosidase and a-o-giucuronidase, when grown on various substrates. All five enzymes were found to be inducible. Wheat straw was found to be the best carbon source for production of extracellular xylanase (172 H/ml) and the maximum number of xylanase isoenxymes. Out of the seven xylanase isoenxymes, xylanase Ic was found to be constitutive whereas the other six xylanases, namely, Ia, Ib, IIa, IIb, IIc and III, exhibited more speck! inducibillty, the magnitude of which depended on the nature of the inducer. The best inducer for bxylosidase and acetyl esterase synthesis by washed mycella was wheat straw whereas arabinose and birchwood xylan brought about the maximum induction of a+arabinofuranosidase and U-D- glucuronidase, respectively. In general, complex substrates were more effective inducers for xylanolytic enzymes than simple sugars.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/304
Appears in Collections:Biochemical Engg. and Biotechnology

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