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Applied and Environmental Microbiology, March 2000, p. 1233-1236, Vol. 66, No. 3
Laboratoire de Biotechnologie, Ecole
Nationale Supérieure de Biologie Appliquée à la
Nutrition et à l'Alimentation, Université de Bourgogne,
21000 Dijon,1 and Laboratoire de
Génétique des Micro-organismes, INRA-CNRS, URA1925,
78850 Thiverval-Grignon,2 France
Received 25 October 1999/Accepted 22 November 1999
We reported previously on the function of acyl coenzyme A
(acyl-CoA) oxidase isozymes in the yeast Yarrowia
lipolytica by investigating strains disrupted in one or several
acyl-CoA oxidase-encoding genes (POX1 through
POX5) (H. Wang et al., J. Bacteriol. 181:5140-5148, 1999).
Here, these mutants were studied for lactone production. Monodisrupted
strains produced similar levels of lactone as the wild-type strain (50 mg/liter) except for
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Involvement of Acyl Coenzyme A Oxidase Isozymes in
Biotransformation of Methyl Ricinoleate into
-Decalactone by
Yarrowia lipolytica
pox3, which produced 220 mg of
-decalactone per liter after 24 h. The
pox2
pox3 double-disrupted strain, although slightly affected in
growth, produced about 150 mg of lactone per liter, indicating that
Aox2p was not essential for the biotransformation. The
pox2
pox3
pox5 triple-disrupted strain produced and consumed
lactone very slowly. On the contrary, the
pox2
pox3
pox4
pox5 multidisrupted strain did not grow or biotransform methyl
ricinoleate into
-decalactone, demonstrating that Aox4p is essential
for the biotransformation.
*
Corresponding author. Mailing address: Laboratoire de
Biotechnologie, Ecole Nationale Supérieure de Biologie
Appliquée à la Nutrition et à l'Alimentation,
Université de Bourgogne, 1, esplanade Erasme, 21000 Dijon,
France. Phone: 33 3 80 39 66 80. Fax: 33 3 80 39 66 41. E-mail:
ywache{at}u-bourgogne.fr.
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