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FUGE-Funksjonell genomforskn.i Norg

Transcriptional and Metabolic Studies in Enterococcus faecalis

Awarded: NOK 2.4 mill.

The study will be initiated by a thorough analysis of the metabolic pathways given by the genome sequence of Enterococcus faecalis V583. The project will investigat the metabolic characteristic of central carbon metabolism of E. faecalis with emhasis on s ugar utilisation. An important part of the project will be construction of metabolic mutants and use these mutants in fermentation studies in order to measure the product formation, fluxes, energy efficacy and yield. The study will be followed up by trans criptional studies using the DNA microarray chip of E. faecalis V583 and proteomic analysis by 2-D PAGE combined by MS analysis 1.Establish a defined growth medium for E.faecalis V583 studies (Month 4) 2.Establish efficient transformation protocols of E. faecalis in order to construct knock out mutants (Month 8). 3.Construct knock out mutants central in suger metabolism. Such mutants will involve mutations in ldh gene, suger uptake (mannose- PTS and other PTSs) and regulatory genes (Month 18) 4.Investi gate the central carbon metabolism of E. faecalis. This will be done in fermentors and in a defined growth medium using different carbohydrates. Fermentation studies will also be performed on relevant mutants (Month 24). 5.Transcriptional analysis of E. faecalis under different growth conditions and with different relevant mutant (Month 24) 6.Establish 2-D polyacryl gel electrophoretic separation condition in order to identify and quantitate key proteins in the sugar catabolism of E. faecalis both in w ild type cells and mutant cells (Month 30). 7.Supply relevant information to the informatic groups in order to construct central metabolic fluxes of E. faecalis and understand these central m

Funding scheme:

FUGE-Funksjonell genomforskn.i Norg