Applied and Environmental Microbiology 1996-10-01

Involvement of carnitine acyltransferases in peroxisomal fatty acid metabolism by the yeast Pichia guilliermondii.

Y Pagot, J M Belin

Index: Appl. Environ. Microbiol. 62(10) , 3864-7, (1996)

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Abstract

This article provides information about peroxisomal fatty acid metabolism in the yeast Pichia guilliermondii. The existence of inducible mitochondrial carnitine palmitoyltransferase and peroxisomal carnitine octanoyl-transferase activities was demonstrated after culture of this yeast in a medium containing methyl oleate. The subcellular sites and induction patterns were studied. The inhibition of carnitine octanoyl- and palmitoyl-transferases by chlorpromazine to a large extent prevented the otherwise observed metabolism-dependent inactivation of thiolase by 2-bromofatty acids in vivo. We concluded that the metabolism of long- and medium-chain fatty acids in the peroxisome of this yeast involved carnitine intermediates.

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