Streptococcus thermophilus Is Able To Produce a β-Galactosidase Active during Its Transit in the Digestive Tract of Germ-Free Mice

1 February 2002

journal article
Published by American Society for Microbiology in Applied and Environmental Microbiology

Vol. 68 (2) , 938-41
https://doi.org/10.1128/aem.68.2.938-941.2002

Abstract

This work presents data on the application of a bacterial luciferase used to monitor gene expression of Streptococcus thermophilus in the digestive tract. The main result is that the bacterium was able to produce an active β-galactosidase in the digestive tract, although it did not multiply during its transit. This production was enhanced when lactose (the inducer) was added to the diet.

Keywords

This publication has 16 references indexed in Scilit:

Chronic consumption of fresh but not heated yogurt improves breath-hydrogen status and short-chain fatty acid profiles: a controlled study in healthy men with or without lactose maldigestion
The American Journal of Clinical Nutrition, 2000
HPr(His∼P)-mediated Phosphorylation Differently Affects Counterflow and Proton Motive Force-driven Uptake via the Lactose Transport Protein of Streptococcus thermophilus
Journal of Biological Chemistry, 2000
Phosphorylation State of HPr Determines the Level of Expression and the Extent of Phosphorylation of the Lactose Transport Protein ofStreptococcus thermophilus
Published by Elsevier ,2000
Effects of Yogurt and Fermented-Then-Pasteurized Milk on Lactose Absorption in an Institutionalized Elderly Group
Journal of the American College of Nutrition, 1992
Analysis of the lacZ sequences from two Streptococcus thermophilus strains: comparison with the Escherichia coli and Lactobacillus bulgaricus β-galactosidase sequences
Microbiology, 1991
The nucleotide sequence of the luxA and luxB genes of Xenorhabdus luminescens HM and a comparison of the amino acid sequences of luciferases from four species of bioluminescent bacteria
Biochemical and Biophysical Research Communications, 1990
Effect of the microbial lactase (EC 3.2.1.23) activity in yoghurt on the intestinal absorption of lactose: An in vivo study in lactase-deficient humans
British Journal of Nutrition, 1990
The geographic hypothesis and lactose malabsorption
Digestive Diseases and Sciences, 1978
RECURRENT ABDOMINAL PAIN DUE TO MILK AND LACTOSE INTOLERANCE IN SCHOOL-AGED CHILDREN
Pediatrics, 1971
[Transit through the digestive tract of the inocula of several bacterial strains introduced "per Os" into axenic and "Holoxenic" mice. The antagonistic effect of the microflora of the gastrointestinal tract].
1970