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'Bioconversion' in keywords Facet   Publication Year 1994  [X]
Facet   section ZfN Section C  [X]
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1Author    Dagmar Busmann, RalfG. Ünter BergerRequires cookie*
 Title    Oxyfunctionalization o f a-and ß-Pinene by Selected Basidiomycetes  
 Abstract    Several strains of basidiom ycetes were examined for their ability to transform a-and ß-pinene in agitated submerged cultures. Four major metabolites of a-pinene (verbenol, ver-benone, myrtenol, and rrorcs-pinocarveol) and three main metabolites of ß-pinene (1,4-cineol, myrtenol, and rrarcs-pinocarveol) were isolated from the fermentation broth. The metabolic pathways included allylic oxidation, oxidative cleavage and further regioselective oxidation. G anoderm a applanatum was found to carry out the stereoselective allylic hydroxylation of a-pinene to verbenol, and o f ß-pinene to trans-pinocarveol in trans position to the C -C bridge. The optimal conditions of the bioreaction were established with respect to substrate concentration, incubation time and conversion time. D ue to growth inhibition caused by elevated substrate concentration, the bioconversion of ß-pinene required pre-grown cultures. Generally, mycelial pellet cultures were supplemented with the terpene substrate when a residual glucose content of 50% was reached. Depending on strain this point was reached after about 48 h. A n incubation period of two to three days gave best yields. The transient accumulation of oxygenated products apparently reflected different reaction velocities of the successive catabolic steps. 
  Reference    Z. Naturforsch. 49c, 545 (1994); received May 26/June 20 1994 
  Published    1994 
  Keywords    Pinene, Cineol, Basidiomycetes, Bioconversion, Transformation 
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 TEI-XML for    default:Reihe_C/49/ZNC-1994-49c-0545.pdf 
 Identifier    ZNC-1994-49c-0545 
 Volume    49