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PLoS One. 2012;7(11):e48920. doi: 10.1371/journal.pone.0048920. Epub 2012 Nov 9.

Modeling the role of negative cooperativity in metabolic regulation and homeostasis.

Author information

  • 1Department of Biology, Harvey Mudd College, Claremont, California, United States of America. eliot.bush@hmc.edu

Erratum in

  • PLoS One. 2013;8(9). doi: 10.1371/annotation/0e4bae85-55dd-4235-a39b-38d02cfd481e. McDermott, Matthew M [corrected to McDermott, Matthew B A].

Abstract

A significant proportion of enzymes display cooperativity in binding ligand molecules, and such effects have an important impact on metabolic regulation. This is easiest to understand in the case of positive cooperativity. Sharp responses to changes in metabolite concentrations can allow organisms to better respond to environmental changes and maintain metabolic homeostasis. However, despite the fact that negative cooperativity is almost as common as positive, it has been harder to imagine what advantages it provides. Here we use computational models to explore the utility of negative cooperativity in one particular context: that of an inhibitor binding to an enzyme. We identify several factors which may contribute, and show that acting together they can make negative cooperativity advantageous.

PMID:
23152821
[PubMed - indexed for MEDLINE]
PMCID:
PMC3494708
Free PMC Article
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