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Type: Artigo de periódico
Title: Characterization Of Monoterpene Biotransformation In Two Pseudomonads.
Author: Bicas, J L
Fontanille, P
Pastore, G M
Larroche, C
Abstract: To study the metabolic profile of Pseudomonas rhodesiae and Pseudomonas fluorescens in water-organic solvent systems using terpene substrates for both growth and biotransformation processes and to determine the aerobic or anaerobic status of these degradation pathways. Substrates from pinene (alpha-pinene, alpha-pinene oxide, beta-pinene, beta-pinene oxide, turpentine) and limonene (limonene, limonene-1,2-oxide, orange peel oil) families were tested. For the bioconversion, the terpene-grown biomass was concentrated and used either as whole cells or as a crude enzymatic extract. Pseudomonas rhodesiae was the most suitable biocatalyst for the production of isonovalal from alpha-pinene oxide and did not metabolize limonene. Pseudomonas fluorescens was a more versatile micro-organism and metabolized limonene in two different ways. The first (anaerobic, cofactor-independent, noninducible) allowed limonene elimination by synthesizing alpha-terpineol. The second (aerobic, cofactor-dependent) involved limonene-1,2-oxide as an intermediate for energy production through a beta-oxidation process. Enzymatic isomerization of beta- to alpha-pinene was described for the first time for both strains. Alpha-terpineol production by P. fluorescens was very efficient and appeared as a promising alternative for the commercial production of this bioflavour.
Subject: Aldehydes
Citrus Sinensis
Plant Oils
Pseudomonas Fluorescens
Citation: Journal Of Applied Microbiology. v. 105, n. 6, p. 1991-2001, 2008-Dec.
Rights: fechado
Identifier DOI: 10.1111/j.1365-2672.2008.03923.x
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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