Sinapic Acid Degradation by the Yeast Rhodotorula glutinis
1986; Microbiology Society; Volume: 132; Issue: 10 Linguagem: Inglês
10.1099/00221287-132-10-2793
ISSN1465-2080
AutoresJ.K. Gupta, C. Jebsen, H. Kneifel,
Tópico(s)Fermentation and Sensory Analysis
ResumoSUMMARY: The degradation of sinapic acid, a monomer of hardwood lignins, by the yeast Rhodotorula glutinis was studied. Syringic acid, 3-O-methyl gallic acid, gallic acid and 2,6-dimethoxy-1,4-benzoquinone were identified as degradation products. Glucose was shown to be required for the demethylation of the methoxy groups on the ring. Unlike in the bacterium Pseudomonas putida, ring cleavage seemed to occur via gallic acid and not via methyl gallic acid. Cell-free oxidative decarboxylase (hydroxylase) activity was detected; this enzyme might be ultimately responsible for the formation of dimethoxyquinone.
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