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Endo-polygalacturonase in Saccharomyces wine yeasts: effect of carbon source on enzyme production.

Authors
  • Radoi, Florentina1
  • Kishida, Masao
  • Kawasaki, Haruhiko
  • 1 Department of Applied Biochemistry, Graduate School of Agriculture and Biological Sciences, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka 599-8531, Japan. , (Japan)
Type
Published Article
Journal
FEMS yeast research
Publication Date
Apr 01, 2005
Volume
5
Issue
6-7
Pages
663–668
Identifiers
PMID: 15780666
Source
Medline
License
Unknown

Abstract

Eight wine yeast strains of Saccharomyces sp. were tested for polygalacturonase (PGase) activity, after cultivation on various carbon sources. No strain showed any activity when grown on glucose, while five strains produced PGase in the presence of galactose and polygalacturonate. These data suggest that the PGase of wine strains is repressed by glucose and induced by galactose and polygalacturonate. The existence of the PGase gene in the wine strains and its similarity with that of the laboratory strains was proved by Southern hybridization and PCR amplification. The promoter region of the PGase gene in the wine strains was slightly different from that of the laboratory strains. This possibly explains the different pattern of gene expression in wine and laboratory strains. The PGase of wine strains produced di- or tri-galacturonic acid from polygalacturonic acid, different from the fungal PGase.

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