Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/87429
Title: Allosteric pyruvate kinase-based “logic gate” synergistically senses energy and sugar levels in Mycobacterium tuberculosis
Authors: 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.
Lescar, Julien
Dedon, Peter Christian
Keywords: Mycobacterium Tuberculosis
Mycobacterium Bovis BCG
Issue Date: 2017
Source: Zhong, W., Cui, L., Goh, B. C., Cai, Q., Ho, P., Chionh, Y. H., et al. (2017). Allosteric pyruvate kinase-based “logic gate” synergistically senses energy and sugar levels in Mycobacterium tuberculosis. Nature Communications, 8(1), 1986-.
Series/Report no.: Nature Communications
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.
URI: https://hdl.handle.net/10356/87429
http://hdl.handle.net/10220/44406
DOI: 10.1038/s41467-017-02086-y
Rights: © 2017 The Author(s) (Nature Publishing Group). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commonslicense, unless indicated otherwise in a credit line to the material. If material is not included in the article’sCreative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SBS Journal Articles

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