SOP 2.1 Method for synthesis of LAB-medium used for the SYSMO-LAB project

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SysMO is a European transnational funding and research initiative on "Systems Biology of Microorganisms".

The goal pursued by SysMO was to record and describe the dynamic molecular processes going on in unicellular microorganisms in a comprehensive way and to present these processes in the form of computerized mathematical models.

Systems biology will raise biomedical and biotechnological research to a new quality level and contribute markedly to progress in understanding. Pooling European research ...

Comparative Systems Biology: Lactic Acid Bacteria

Basically extending SYSMO-LAB 1st phase into second with addition of fourth species, Lb. plantarum. The main focus is amino acid metabolism. primary metabolisms, like glycolysis is also interest.

Challenge: Comparative analyses, as demonstrated by comparative genomics and bioinformatics, are extremely powerful for (i) transfer of information from (experimentally) well-studied organisms to the other organisms, and (ii) when coupled to functional and phenotypic information, insight in the relative importance of components to the observed differences and simalities. The central principle of this proposal is that important aspects of the functional differences between organisms derive not ...

Lactic acid bacteria generally use homolactic fermentation for generation of ATP. Here we studied the role of Arginine and Glutamine metabolism on the general physiology of the lactic acid bacteria Streptococcus pyogenes. A deletion mutant of glnA (glutamine synthetase) has been constructed in the S. pyogenes M49 591 background. The glnA mutant strain shows decreased growth in low glutamine and excess glutamate conditions and no growth at all in low glutamine and low glutamate conditions. An arcA ...

The two lactic acid bacteria L. lactis and S. pyogenes were studied with respect to the concentration of intracellular metabolites involved in glycolysis in time upon a glucose pulse. Models that describe this behavior are also constructed

L. lactis was grown in LAB medium or rich THY medium, strongly concentrated and glucose-pulsed in a MES buffer. Intracellular metabolite concentration is followed in time.

S. pyogenes wildetype, an arcA- and a glnA-deletion mutants were grown in CDM-LAB cultures at pH 6.5 and 7.5 and at a growth rate of 0.05