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Microbial degradation of hemicellulosic materials

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Abstract

Biodegradation of hemicelluloses requires enzyme activities that remove nonxylose substituents from the xylan backbone in addition to endoxylanases and β-xylosidases. Activities removing o-acetyl, arabinose, cinnamic acid-based esters, and uronic acid substituents occurred inStreptomyces olivochromogenes, Aspergillus niger, andSchizophyllum commune. 4-O-Methylglucuronidase was coinduced with other substituent-hydrolyzing enzymes when appropriate lignocellulosic materials were provided. Fractionation of crude enzymes indicated that the 4-o-methylglucuronidases were polydisperse. The 4-o-methylglucuronidases fromS. commune andA. niger acted on high molecular weight heteroxylans, but those from S.olivochromogenes functioned only with small, endo-β-(1,4)-xylanse-solubilized fragments.

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Authors and Affiliations

  1. Division of Biological Sciences, National Research Council of Canada, K1A OR6, Ottawa, Canada

    K. G. Johnson, M. C. Silva, C. R. Mackenzie & H. Schneider

  2. Department of Biochemistry, Universidade Federal do Parana (81.504), Curitiba, Parana, Brazil

    J. D. Fontana

Authors
  1. K. G. Johnson
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  2. M. C. Silva
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  3. C. R. Mackenzie
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  4. H. Schneider
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  5. J. D. Fontana
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Johnson, K.G., Silva, M.C., Mackenzie, C.R. et al. Microbial degradation of hemicellulosic materials. Appl Biochem Biotechnol 20, 245–258 (1989). https://doi.org/10.1007/BF02936486

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  • DOI: https://doi.org/10.1007/BF02936486

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