Abstract
In this paper, we analyze several cancer cell types from two seemingly independent angles: (a) the over-expression of various proteins participating in protein-protein interaction networks and (b) a metabolic shift from oxidative phosphorylation to glycolysis. We use large data sets to obtain a thermodynamic measure of the protein-protein interaction network, namely the associated Gibbs free energy. We find a strong inverse correlation between the percentage of energy production via oxidative phosphorylation and the Gibbs free energy of the protein networks. The latter is a measure of functional dysregulation within the cell. Our findings corroborate earlier indications that signaling pathway upregulation in cancer cells is linked to the metabolic shift known as the Warburg effect; hence, these two seemingly independent characteristics of cancer phenotype may be interconnected.
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JAT gratefully acknowledges generous support from NSERC (Canada).
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EAR and JAT conceived and designed the study. SMG and ANN carried out the computations. All authors contributed to the analysis and to the writing of the manuscript.
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Golas, S.M., Nguyen, A.N., Rietman, E.A. et al. Gibbs free energy of protein-protein interactions correlates with ATP production in cancer cells. J Biol Phys 45, 423–430 (2019). https://doi.org/10.1007/s10867-019-09537-1
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DOI: https://doi.org/10.1007/s10867-019-09537-1