Impact of Lactic Acid and Hydrogen Ion on the Simultaneous Fermentation of Glucose and Xylose by the Carbon Catabolite Derepressed Lactobacillus brevis ATCC 14869
Autor: | Sharon P. Shoemaker, Kyung Hun Jeong, Beenish Israr, Jaehan Kim, David A. Mills |
---|---|
Rok vydání: | 2016 |
Předmět: |
0106 biological sciences
0301 basic medicine Levilactobacillus brevis Catabolite repression Xylose 01 natural sciences Applied Microbiology and Biotechnology 03 medical and health sciences Acetic acid chemistry.chemical_compound 010608 biotechnology Food science Lactic Acid biology Lactobacillus brevis food and beverages Substrate (chemistry) General Medicine Hydrogen-Ion Concentration biology.organism_classification Carbon Lactic acid Kinetics 030104 developmental biology Glucose chemistry Biochemistry Fermentation Sodium acetate Biotechnology |
Zdroj: | Journal of microbiology and biotechnology. 26(7) |
ISSN: | 1738-8872 |
Popis: | Lactobacillus brevis ATCC 14869 exhibited a carbon catabolite de-repressed (CCR) phenotype which has ability to consume fermentable sugar simultaneously with glucose. To evaluate this unusual phenotype under harsh conditions during fermentation, the effect of lactic acid and hydrogen ion concentrations on L. brevis ATCC 14869 were examined. Kinetic equations describing the relationship between specific cell growth rate and lactic acid or hydrogen ion concentration has been reduced. The change of substrate utilization and product formation according to lactic acid and hydrogen ion concentration in the media were quantitatively described. Moreover; utilization of other compounds were also observed along with hydrogen ion and lactic acid concentration simultaneously. It has been found that substrate preference changes significantly regarding to utilization of compounds in media. That could result into formation of two-carbon products. In particular, acetic acid present in the media as sodium acetate were consumed by L. brevis ATCC 14869 under extreme pH of both acid and alkaline conditions. |
Databáze: | OpenAIRE |
Externí odkaz: |