Adaptation of Propionibacterium freudenreichii to long-term survival under gradual nutritional shortage. (December 2016)

• Record Type: Journal Article
• Authors: Aburjaile, Flavia; Rohmer, Marine; Parrinello, Hugues; Maillard, Marie-Bernadette; Beaucher, Eric; Henry, Gwénaële; Nicolas, Aurélie; Madec, Marie-Noëlle; Thierry, Anne; Parayre, Sandrine; Deutsch, Stéphanie-Marie; Cocaign-Bousquet, Muriel; Miyoshi, Anderson; Azevedo, Vasco; Le Loir, Yves; Falentin, Hélène
• Is Part Of: BMC genomics. Volume 17:Number 1(2016)
• Page Start: 1
• Page End: 13
• Publication Date: 2016-12
• Subjects: Propionibacterium freudenreichii -- Long-term survival -- Stationary phase -- RNA-seq -- Adaptation; Genomes -- Periodicals; Gene mapping -- Periodicals; Genomics -- Periodicals; Base Sequence -- Periodicals; Chromosome Mapping -- Periodicals; Genetic Techniques -- Periodicals; Sequence Analysis, DNA -- Periodicals; 572.8605
• DOI: 10.1186/s12864-016-3367-x
• Languages: English
• ISSNs: 1471-2164

Abstract

Abstract Background Propionibacterium freudenreichii is an Actinobacterium widely used in the dairy industry as a ripening culture for Swiss-type cheeses, for vitamin B12 production and some strains display probiotic properties. It is reportedly a hardy bacterium, able to survive the cheese-making process and digestive stresses. Results During this study, P. freudenreichii CIRM-BIA 138 (alias ITG P9), which has a generation time of five hours in Yeast Extract Lactate medium at 30 °C under microaerophilic conditions, was incubated for 11 days (9 days after entry into stationary phase) in a culture medium, without any adjunct during the incubation. The carbon and free amino acids sources available in the medium, and the organic acids produced by the strain, were monitored throughout growth and survival. Although lactate (the preferred carbon source forP. freudenreichii ) was exhausted three days after inoculation, the strain sustained a high population level of 9.3 log10 CFU/mL. Its physiological adaptation was investigated by RNA-seq analysis and revealed a complete disruption of metabolism at the entry into stationary phase as compared to exponential phase. Conclusions P. freudenreichii adapts its metabolism during entry into stationary phase by down-regulating oxidative phosphorylation, glycolysis, and the Wood-Werkman cycle by exploiting new nitrogen (glutamate, glycine, alanine) sources, by down-regulating the transcription, translation and secretion of protein. Utilization of polyphosphates was suggested.