Pathways for lactose/galactose catabolism by Streptococcus salivarius

被引：18

作者：

Chen, YYM ^{[1
]}

Betzenhauser, MJ ^{[1
]}

Snyder, JA ^{[1
]}

Burne, RA ^{[1
]}

机构：

[1] Univ Florida, Coll Dent, Dept Oral Biol, Gainesville, FL 32610 USA

来源：

FEMS MICROBIOLOGY LETTERS | 2002年 / 209卷 / 01期

关键词：

galactokinase; beta-galactosidase; Leloir pathway; Streptococcus salivarius;

D O I：

10.1111/j.1574-6968.2002.tb11112.x

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Galactokinase and beta-galactosidase-deficient strains of Streptococcus salivarius were constructed to define the pathways for lactose and galactose catabolism. It was found that S. salivarius does not possess a lactose-specific phosphoenolpyruvate phosphotransferase system (PTS), that intracellular lactose was hydrolyzed by beta-galactosidase, and that galactose is catabolized exclusively through the Leloir pathway. The lack of a high-affinity PTS for lactose may reflect the higher availability of the substrates to soft tissue organisms, such as S. salivarius, compared to dental plaque bacteria. (C) 20021 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.

引用

页码：75 / 79

页数：5

共 17 条

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