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Biochemical characterization of the multi-enzyme system produced by Penicillium decumbens grown on rutin
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2004 (English)In: Food biotechnology, ISSN 0890-5436, E-ISSN 1532-4249, Vol. 18, no 1, p. 1-18Article in journal (Refereed) Published
Abstract [en]

Penicillium decumbens produced a set of enzymes, including a monoxygenase and two glycosidases, which degrade rutin, a nontoxic flavonoid glycoside, to water-soluble products. The monoxygenase (quercetinase) cleaves the heterocyclic ring in quercetin, the aglycone part of rutin. The glycosidases (alpha-L-rhamnosidase and beta-glucosidase) hydrolyze the bonds between quercetin and rutinose, and between glucose and rhamnose, the constituent monosaccharides of rutinose. Simultaneous production of the three enzymes was optimized following the examination of a number of culture conditions. Maximum enzyme activities were observed when the fungus was grown at 30 °C with an initial pH of 7.0, using 8.0 g/L rutin and 9.0 g/L di-ammonium hydrogen phosphate as carbon and nitrogen sources, respectively. The enzymes were purified to electrophoretic homogeneity by a series of consecutive chromatographic steps including anion and cation exchange as well as gel filtration. The purified quercetinase revealed an apparent tetrameric structure, with a reduced molecular mass of 45 kDa. alpha-L-Rhamnosidase showed an apparent molecular mass of 58 kDa and the purified beta-glucosidase was a tetramer exhibiting a reduced molecular mass of 120 kDa.

Place, publisher, year, edition, pages
2004. Vol. 18, no 1, p. 1-18
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URN: urn:nbn:se:ltu:diva-3141DOI: 10.1081/FBT-120030382Local ID: 0edad171-cb75-4603-9028-72e05390e86aOAI: oai:DiVA.org:ltu-3141DiVA: diva2:975997
Note
Upprättat; 2004; 20130213 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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