D-xylan-degrading enzyme system from the fungus Phanerochaete chrysosporium: isolation and partial characterisation of an alpha-(4-O-methyl)-D-glucuronidase

Journal of Biotechnology
A CastanaresT M Wood

Abstract

A number of fungi were screened for their capacities to produce extracellular alpha-(4-O-methyl)-D-glucuronidase. Of those tested, Phanerochaete chrysosporium ATCC 24725 produced the enzyme in greatest yield. The single alpha-(4-O-methyl)-D-glucuronidase produced by this fungus was purified by a series of chromatographic methods involving anion exchange, hydrophobic interaction and chromatofocusing. Isolated in this way, the enzyme had an apparent molecular mass of 112 kDa in sodium dodecyl sulphate polyacrylamide gels, and a pI of 4.6 when determined by isoelectric focusing in polyacrylamide gels. The enzyme was optimally active at pH 3.5, but showed significant activity over the pH range 3-5. In the absence of substrate the enzyme was inactivated at pH 3.5 in 2 h at 50 degree C: at pH 5.0 it retained 42% of its activity for 24 h at this temperature. The enzyme showed little activity on glucuronoxylan polysaccharides, but some short-chain xylo-oligosaccharides which were substituted with alpha-linked 4-O-methyl-D-glucopyranosyl uronic acid attached to the 2-position of the non-reducing D-xylopyranosyl residue were readily hydrolysed. There were marked synergistic effects apparent in the release of 4-O-methyl-D-glucopyranosyl u...Continue Reading

References

Aug 1, 1977·Carbohydrate Research·T M Wood, S I McCrae
May 1, 1991·World Journal of Microbiology & Biotechnology·D C Smith, T M Wood

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Citations

Jul 26, 2008·Applied Microbiology and Biotechnology·Holy RavalasonIsabelle Herpoël-Gimbert
Nov 19, 2008·Applied Biochemistry and Biotechnology·Charles C LeeDominic W S Wong
Mar 22, 2000·Journal of Biotechnology·M Tenkanen, M Siika-aho
Jan 25, 2011·Microbial Biotechnology·Katharina DrzewieckiWolfgang Liebl
Feb 15, 2012·The Biochemical Journal·Douglas B JordanKurt Wagschal
Nov 28, 2014·Microbiology and Molecular Biology Reviews : MMBR·Johanna RytiojaMiia R Mäkelä
Sep 29, 2011·Journal of Proteomics·Arulmani ManavalanSiu Kwan Sze
Aug 20, 2005·Preparative Biochemistry & Biotechnology·Małgorzata MierzwaJanusz Szczodrak
Jun 19, 2021·Fungal Biology·M C Tamayo-OrdóñezY J Tamayo-Ordóñez

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