34 citations · 281 across the 28 of their papers we have counts for
7 papers · 1 filter
Short time extremal response to step stimulus for a single cell {\sl E. coli}
Sakuntala Chatterjee
After application of a step stimulus, in the form of a sudden change in attractant environment, the receptor activity and tumbling bias of an {\sl E. coli} cell change sharply to r…
Effect of switching time scale of receptor activity on chemotactic performance of Escherichia coli
Shobhan Dev Mandal, Sakuntala Chatterjee
In the chemotactic motion of Escherichia coli, the switching of transmembrane chemoreceptors between active and inactive states is one of the most important steps of the signaling…
Effect of receptor cooperativity on methylation dynamics in bacterial chemotaxis with weak and strong gradient
Shobhan Dev Mandal, Sakuntala Chatterjee
We study methylation dynamics of the chemoreceptors as an {\sl E.coli} cell moves around in a spatially varying chemo-attractant environment. We consider attractant concentration w…
Effect of receptor clustering on chemotactic performance of Escherichia coli: sensing versus adaptation
Shobhan Dev Mandal, Sakuntala Chatterjee
We show how the competition between sensing and adaptation can result in a performance peak in E.coli chemotaxis using extensive numerical simulations in a detailed theoretical mod…
Run-and-tumble motion with step-like responses to a stochastic input
Subrata Dev, Sakuntala Chatterjee
We study a simple run-and-tumble random walk whose switching frequency from run mode to tumble mode and the reverse depend on a stochastic signal. We consider a particularly sharp,…
Optimal methylation noise for best chemotactic performance of {\sl E. coli}
Subrata Dev, Sakuntala Chatterjee
In response to a concentration gradient of nutrient, E. coli bacterium modulates the rotational bias of flagellar motors which control its run-and-tumble motion, to migrate towards…
Optimal search in E.coli chemotaxis
Subrata Dev, Sakuntala Chatterjee
We study chemotaxis of a single {\sl E.coli} bacterium in a medium where the nutrient chemical is also undergoing diffusion and its concentration has the form of a Gaussian whose w…