Metabolism of ferulic acid by Paecilomyces variotii and Pestalotia palmarum

Ferulic acid metabolism was studied in cultures of two micromycetes producing different amounts of phenol oxidases. In cultures of the low phenol oxidase producer Paecilomyces variotii, ferulic acid was decarboxylated to 4-vinylguaiacol, which was converted to vanillin and then either oxidized to va...

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Veröffentlicht in:Applied and Environmental Microbiology 1989-09, Vol.55 (9), p.2391-2398
Hauptverfasser: Rahouti, M. (Laboratoire de Botanique, Cryptogamie, Biologie, Cellulaire et Genetique, Meylan, France), Seigle-Murandi, F, Steiman, R, Eriksson, K.E
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Sprache:eng
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Zusammenfassung:Ferulic acid metabolism was studied in cultures of two micromycetes producing different amounts of phenol oxidases. In cultures of the low phenol oxidase producer Paecilomyces variotii, ferulic acid was decarboxylated to 4-vinylguaiacol, which was converted to vanillin and then either oxidized to vanillic acid or reduced to vanillyl alcohol. Vanillic acid underwent simultaneously an oxidative decarboxylation to methoxyhydroquinone and a nonoxidative decarboxylation to guaiacol. Methoxyhydroquinone and guaiacol were demethylated to yield hydroxyquinol and catechol, respectively. Catechol was hydroxylated to pyrogallol. Degradation of ferulic acid by paecilomyces variotii proceeded mainly via methoxyhydroquinone. The high phenol oxidase producer Pestalotia palmarum catabolized ferulic acid via 4-vinylguaiacol, vanillin, vanillyl alcohol, vanillic acid, and methoxyhydroquinone. However, the main reactions observed with this fungus involved polymerization reactions
ISSN:0099-2240
1098-5336
DOI:10.1128/AEM.55.9.2391-2398.1989