Investigations
What is an Investigation?
The electron transport chain of E. coli is branched. Different NAD Dehydrogenases and terminal oxidases are known to be expressed at different oxygen availabilities. By deleting multiple genes mutant strains were constructed that posses a linear electron transport chain. These mutants were investigated in continous bioreactor experiments with limiting glucose and varying oxygen supply.
Submitter: Katja Bettenbrock
Studies: Analysis of Escherichia coli strains with linear respiratory chain
Assays: Determination of by-product formation and glucose uptake of mutants with..., Deternination of ArcA phosphroylation level in mutants with linear ETC a..., Gene expression analysis of mutants with linear electron transport chain...
In Escherichia coli several systems are known to transport glucose into the cytoplasm. A series of mutant strains were constructed, which lack one or more of these uptake systems. These were analyzed in aerobic and anaerobic batch cultures, as well as glucose limited continuous cultivations.
Submitter: Sonja Steinsiek
Studies: Characterization of mutant strains with defects in sugar transport systems
Assays: Aerobic and anaerobic characterization of MG1655 and mutant strains with..., Aerobic and anaerobic characterization of MG1655 and mutant strains with..., Characterization of MG1655 and mutant strains under conditions of glucos..., TFinfer2
Changing the oxygen availability leads to an adaptation of Escherichia coli at different biological levels. After pertubation of oxygen in chemostat experiments the microorganism(s) will come back to another steady state. This investigation deals with these stationary responses of Escherichia coli within the aerobiosis scale. The change for different biological variables, in different areas of the organism like the electron transport chain, the TCA cycle or globally is investigated by wildtype ...
Submitter: Michael Ederer
Studies: Basic regulatory principles of Escherichia coli’s electron transport cha..., Determination of the impact of specific enzyme reactions and regulatory ..., Quantitative analysis of catabolic carbon and electron fluxes in E. coli..., The Escherichia coli steady state response to oxygen: from molecular int...
Assays: Analysis of by-product formation rates in MG1655, Analysis of gene expression rates at different aerobiosis levels via RT-PCR, ArcA phosphorylation at different aerobiosis levels (steady states), Characterization of E. coli MG1655 and ∆sdhC and ∆frdA isogenic mutant s..., Determination of intracellular metabolite concentrations, Determination of intracellular redox state by means of NAD/NADH ratio, Determination of intracellular redox state by means of ubiquinones (oxd/..., FNR activity at different aerobiosis levels (steady state), Kinetic modelling of Escherichia coli's electron transport chain, Kinetic modelling of Escherichia coli's electron transport chain coupled..., Literature Data from Alexeeva et al., J. Bacteriol., 2000, 2002, 2003, Measurement of cytochrome numbers, Physiological measurements from Sheffield chemostat, Steady State Oxygen Response of E. coli WT and two Electron Transport Ch..., Transcriptional profiling of steady states at different aerobiosis levels
Changing the oxygen availability leads to an adaptation of Escherichia coli at different biological levels. After pertubation of oxygen in chemostat experiments there are very quick responses. This investigation deals with this dynamical behaviour (transitions) of Escherichia coli within the aerobiosis scale. The change for different biological variables, in different areas of the organism like the electron transport chain, the TCA cycle or globally is investigated by wildtype and mutants experiments ...
