Sensor potency of the moonlighting enzyme-decorated cytoskeleton

Vic Norris 1, 2 Patrick Amar 3, 4 Guillaume Legent 1, 2 Camille Ripoll 5, 1, 2 Michel Thellier 1, 2 Judit Ovadi 6
4 AMIB - Algorithms and Models for Integrative Biology
LIX - Laboratoire d'informatique de l'École polytechnique [Palaiseau], LRI - Laboratoire de Recherche en Informatique, UP11 - Université Paris-Sud - Paris 11, Inria Saclay - Ile de France, Polytechnique - X, CNRS - Centre National de la Recherche Scientifique : UMR8623
Abstract : There is extensive evidence for the interaction of metabolic enzymes with the eukaryotic cytoskeleton. The significance of these interactions is far from clear. In the cytoskeletal integrative sensor hypothesis presented here, the cytoskeleton senses and integrates the general metabolic activity of the cell. This activity depends on the binding to the cytoskeleton of enzymes and, depending on the nature of the enzyme, this binding may occur if the enzyme is either active or inactive but not both. This enzyme-binding is further proposed to stabilize microtubules and microfilaments and to alter rates of GTP and ATP hydrolysis and their levels. Evidence consistent with the cytoskeletal integrative sensor hypothesis is presented in the case of glycolysis. Several testable predictions are made. There should be a relationship between the sites on tubulin and actin that undergo post-translational modification and interaction with metabolic enzymes. Different conditions of cytoskeletal dynamics and enzyme-cytoskeleton binding should reveal significant differences in local and perhaps global levels and ratios of ATP and GTP. The different functions of moonlighting enzymes should depend on cytoskeletal binding. The physical and chemical effects arising from metabolic sensing by the cytoskeleton would have major consequences on cell shape, dynamics and cell cycle progression. The hypothesis provides a framework that helps the significance of the enzyme-decorated cytoskeleton be determined.
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Contributeur : Patrick Amar <>
Soumis le : lundi 17 décembre 2012 - 15:00:31
Dernière modification le : vendredi 2 mars 2018 - 14:48:06

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Vic Norris, Patrick Amar, Guillaume Legent, Camille Ripoll, Michel Thellier, et al.. Sensor potency of the moonlighting enzyme-decorated cytoskeleton. BMC Biochemistry, BioMed Central, 2013, 14 (3), pp.1-10. 〈10.1186/1471-2091-14-3〉. 〈hal-00766058〉



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