Allosteric pyruvate kinase-based “logic gate” synergistically senses energy and sugar levels in Mycobacterium tuberculosis
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s41467-017-02086-y.pdf
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Author(s)
Zhong, Wenhe
Cui, Liang
Goh, Boon Chong
Cai, Qixu
Ho, Peiying
Chionh, Yok Hian
Yuan, Meng
Sahili, Abbas El
Fothergill-Gilmore, Linda A.
Walkinshaw, Malcolm D.
Date Issued
December 2017
Journal
Nature Communications
Publisher
Nature Publishing Group
Citation
Zhong, Wenhe et al. “Allosteric Pyruvate Kinase-Based ‘logic Gate’ Synergistically Senses Energy and Sugar Levels in Mycobacterium Tuberculosis.” Nature Communications 8, 1 (December 2017): 1986 © 2017 The Author(s)
Version
Final published version
Abstract
Pyruvate kinase (PYK) is an essential glycolytic enzyme that controls glycolytic flux and is critical for ATP production in all organisms, with tight regulation by multiple metabolites. Yet the allosteric mechanisms governing PYK activity in bacterial pathogens are poorly understood. Here we report biochemical, structural and metabolomic evidence that Mycobacterium tuberculosis (Mtb) PYK uses AMP and glucose-6-phosphate (G6P) as synergistic allosteric activators that function as a molecular "OR logic gate" to tightly regulate energy and glucose metabolism. G6P was found to bind to a previously unknown site adjacent to the canonical site for AMP. Kinetic data and structural network analysis further show that AMP and G6P work synergistically as allosteric activators. Importantly, metabolome profiling in the Mtb surrogate, Mycobacterium bovis BCG, reveals significant changes in AMP and G6P levels during nutrient deprivation, which provides insights into how a PYK OR gate would function during the stress of Mtb infection.
MIT Department
Massachusetts Institute of Technology. Department of Biological Engineering
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1038/s41467-017-02086-y
