Mathematical modeling of the low and high affinity arabinose transport systems in Escherichia coli.
A mathematical model was developed for the low and high affinity arabinose transport systems in E. coli. The model is a system of three ordinary differential equations and takes the dynamics of mRNAs for the araE and araFGH proteins and the internal arabinose into account. Special attention was paid to estimate the model parameters from the literature. Our analysis and simulations suggest that the high affinity transport system helps the low affinity transport system to respond to high concentration of extracellular arabinose faster, whereas the high affinity transport system responds to a small amount of extracellular arabinose. Steady state analysis of the model also predicts that there is a regime for the extracellular concentration of arabinose where the arabinose system can show bistable behavior.
Division of Natural Sciences, New College of Florida, Sarasota, FL 34243, USA. nyildirim@ncf.edu
Necmettin
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Yildirim
D001089:Arabinose / Q000378:metabolism*; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism; D001693:Biological Transport, Active; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism*; D029968:Escherichia coli Proteins / Q000235:genetics / Q000378:metabolism; D015964:Gene Expression Regulation, Bacterial; D008962:Models, Theoretical; D009004:Monosaccharide Transport Proteins / Q000235:genetics / Q000378:metabolism
C109577:AraE protein, bacteria; D001426:Bacterial Proteins; D029968:Escherichia coli Proteins; D009004:Monosaccharide Transport Proteins; D001089:Arabinose