A model of excitation and adaptation in bacterial chemotaxis

Peter A. Spiro, John S. Parkinson, Hans G. Othmer

Research output: Contribution to journalArticlepeer-review

133 Scopus citations

Abstract

Bacterial chemotaxis is widely studied because of its accessibility and because it incorporates processes that are important in a number of sensory systems: signal transduction, excitation, adaptation, and a change in behavior, all in response to stimuli. Quantitative data on the change in behavior are available for this system, and the major biochemical steps in the signal transduction/processing pathway have been identified. We have incorporated recent biochemical data into a mathematical model that can reproduce many of the major features of the intracellular response, including the change in the level of chemotactic proteins to step and ramp stimuli such as those used in experimental protocols. The interaction of the chemotactic proteins with the motor is not modeled, but we can estimate the degree of cooperativity needed to produce the observed gain under the assumption that the chemotactic proteins interact directly with the motor proteins.

Original languageEnglish (US)
Pages (from-to)7263-7268
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume94
Issue number14
DOIs
StatePublished - Jul 8 1997

Bibliographical note

Funding Information:
We thank Professor Lubert Stryer for suggesting this study and for many helpful and stimulating discussions. This work was supported in part by the Department of Energy/Basic Energy Sciences.

Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.

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