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Formation of taste-active amino acids, amino acid derivatives and peptides in food fermentations – A review
Download2016-11-01
Zhao, Cindy J., Schieber, Andreas, Gänzle, Michael G.
Fermented foods are valued for their rich and complex odour and taste. The metabolic activity of food-fermenting microorganisms determines food quality and generates odour and taste compounds. This communication reviews the formation of taste-active amino acids, amino acid derivatives and...
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Functional characterization of sucrose phosphorylase and scrR, a regulator of sucrose metabolism in Lactobacillus reuteri
Download2013-01-01
Teixeira, Januana S., Abdi, Reihaneh, Su, Marcia Shu-Wei, Schwab, Clarissa, Gänzle, Michael G.
Lactobacillus reuteri harbours alternative enzymes for sucrose metabolism, sucrose phosphorylase, fructansucrases, and glucansucrases. Sucrose phosphorylase and fructansucrases additionally contribute to raffinose metabolism. Glucansucrases and fructansucrases produce exopolysaccharides as...
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Gene-expression profiling of calves 6 and 9 months after inoculation with Mycobacterium avium subspecies paratuberculosis
Download2014
David, Joel, De Buck, Jeroen, Barkema, Herman W., Guan, Leluo
Early detection of Johne's disease (JD) caused by Mycobacterium avium subspecies paratuberculosis (MAP) is essential to reduce transmission; consequently, new diagnostic techniques and approaches to detect MAP or markers of early MAP infection are being explored. The objective was to identify...
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Genetic and phenotypic analysis of carbohydrate metabolism and transport in Lactobacillus reuteri
Download2018-01-01
Lactobacilli derive metabolic energy mainly from carbohydrate fermentation. Homofermentative and heterofermentative lactobacilli exhibit characteristic differences in carbohydrate transport and regulation of metabolism, however, enzymes for carbohydrate transport in heterofermentative...
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2015
Garcia-Hernandez, Rigoberto, Ruan, Lifang, Gänzle, Michael G., Zheng, Jinshui, Mercer, Ryan G., McMullen, Lynn M.
Escherichia coli AW1.7 is a heat resistant food isolate and the occurrence of pathogenic strains with comparable heat resistance may pose a risk to food safety. To identify the genetic determinants of heat resistance, 29 strains of E. coli that differed in their of heat resistance were analyzed...
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Glutamine supplementation improves intestinal barrier function in a weaned piglet model of Escherichia coli infection
Download2011
Johnson, Ian R., Ewaschuk, Julia B., Murdoch, Gordon K., Field, Catherine J., Madsen, Karen L.
The weaning period is associated with an increased prevalence of gastrointestinal infection in many species. Glutamine (Gln) has been shown to improve intestinal barrier function and immune function in both in vivo and in vitro models. The objective of the present study was to determine the...
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2014-01-01
Teixeira, Januana S., Seeras, Arisha, Sanchez-Maldonado, Alma Fernanda, Zhang, Chonggang, Su, Marcia Shu-Wei, Gänzle, Michael G.
This study aimed to determine whether glutamine deamidation improves acid resistance of Lactobacillus reuteri, and to assess whether arginine, glutamine, and glutamate-mediated acid resistance are redundant or complementary mechanisms of acid resistance. Three putative glutaminase genes, gls1,...
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Host-adapted lactobacilli in food fermentations: impact of metabolic traits of host adapted lactobacilli on food quality and human health
Download2020-10-27
Back-slopping of fermentation cultures in food fermentations can ensure stability of fermentation microbiota at the species or even at the strain level over extended periods of time. In contrast to the fermentation organisms in spontaneous food fermentations, which are derived from...
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2019-01-01
Zhao, Xin, Wang, Weilan, Blaine, Alysson, Kane, Sarah T., Zijlstra, Ruurd T., Gänzle, Michael G.
Aims: This study aimed to determine whether host-adapted lactobacilli exhibit superior survival during intestinal transit relative to nomadic and free-living organisms, and to characterize the impact of probiotic lactobacilli on autochthonous lactobacilli. Methods and Results: Mixed cultures of...
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2020-08-01
Hu, Ying, Winter, Verena, Gänzle, Michael G.
Isomalto-oligosaccharides (IMO) significantly contribute to the global oligosaccharide market. IMO are linear α-(1 → 6) linked oligosaccharides with isomaltotriose as the representative trisaccharide. Commercial IMO preparations ypically also contain panose-series oligosaccharides as a major...