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Critical Regulation of Multienzyme Complexes: A Kinetic Model for the Mammalian Pyruvate Dehydrogenase Complex

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Abstract

The pyruvate dehydrogenase complex (PDC) is one of the most intensively studied multienzyme complexes. The PDC plays a central role in intermediary metabolism, being a major site of regulation1. We construct a simple kinetic model, predicting the so-called ‘critical’ regulation2 for mammalian PDC. The regulation of the critical type is characteristic of bistable systems having two alternative stable steady states2 and may be observed as a steep change in metabolite levels.

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References

  1. M.S. Patel and T.E. Roche, Molecular biology and biochemistry of pyruvate dehyrdrogenase complexes,FASEB J. 4:3224–3233 (1990).

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  2. B.N. Goldstein and A.N. Ivanova, Hormonal regulation of 6-phosphofructo-2-kinase/fructose-2,6-bis-phosphatase: kinetic models, FEBS Lett. 217:212–215 (1987).

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  3. M. Rahmatullah, G.A. Radke, S.L. Powers-Greenwood, P.C. Andrews and T.E. Roche, Changes in the core of the mammalian pyruvate dehydrogenase complex upon selective removal of the lipoyl domain from the transacetylase component but not from the protein X component, J. Biol. Chem. 265: 14512–14517(1990).

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© 1993 Springer Science+Business Media New York

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Goldstein, B.N., Selivanov, V.A. (1993). Critical Regulation of Multienzyme Complexes: A Kinetic Model for the Mammalian Pyruvate Dehydrogenase Complex. In: Schuster, S., Rigoulet, M., Ouhabi, R., Mazat, JP. (eds) Modern Trends in Biothermokinetics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-2962-0_16

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  • DOI: https://doi.org/10.1007/978-1-4615-2962-0_16

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4613-6288-3

  • Online ISBN: 978-1-4615-2962-0

  • eBook Packages: Springer Book Archive

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