Protein-metabolite interactomics of carbohydrate metabolism reveal regulation of lactate dehydrogenase. 2023

Kevin G Hicks, and Ahmad A Cluntun, and Heidi L Schubert, and Sean R Hackett, and Jordan A Berg, and Paul G Leonard, and Mariana A Ajalla Aleixo, and Youjia Zhou, and Alex J Bott, and Sonia R Salvatore, and Fei Chang, and Aubrie Blevins, and Paige Barta, and Samantha Tilley, and Aaron Leifer, and Andrea Guzman, and Ajak Arok, and Sarah Fogarty, and Jacob M Winter, and Hee-Chul Ahn, and Karen N Allen, and Samuel Block, and Iara A Cardoso, and Jianping Ding, and Ingrid Dreveny, and William C Gasper, and Quinn Ho, and Atsushi Matsuura, and Michael J Palladino, and Sabin Prajapati, and Pengkai Sun, and Kai Tittmann, and Dean R Tolan, and Judith Unterlass, and Andrew P VanDemark, and Matthew G Vander Heiden, and Bradley A Webb, and Cai-Hong Yun, and Pengkai Zhao, and Bei Wang, and Francisco J Schopfer, and Christopher P Hill, and Maria Cristina Nonato, and Florian L Muller, and James E Cox, and Jared Rutter
Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT, USA.

Metabolic networks are interconnected and influence diverse cellular processes. The protein-metabolite interactions that mediate these networks are frequently low affinity and challenging to systematically discover. We developed mass spectrometry integrated with equilibrium dialysis for the discovery of allostery systematically (MIDAS) to identify such interactions. Analysis of 33 enzymes from human carbohydrate metabolism identified 830 protein-metabolite interactions, including known regulators, substrates, and products as well as previously unreported interactions. We functionally validated a subset of interactions, including the isoform-specific inhibition of lactate dehydrogenase by long-chain acyl-coenzyme A. Cell treatment with fatty acids caused a loss of pyruvate-lactate interconversion dependent on lactate dehydrogenase isoform expression. These protein-metabolite interactions may contribute to the dynamic, tissue-specific metabolic flexibility that enables growth and survival in an ever-changing nutrient environment.

UI MeSH Term Description Entries
D007770 L-Lactate Dehydrogenase A tetrameric enzyme that, along with the coenzyme NAD+, catalyzes the interconversion of LACTATE and PYRUVATE. In vertebrates, genes for three different subunits (LDH-A, LDH-B and LDH-C) exist. Lactate Dehydrogenase,Dehydrogenase, L-Lactate,Dehydrogenase, Lactate,L Lactate Dehydrogenase
D009928 Organ Specificity Characteristic restricted to a particular organ of the body, such as a cell type, metabolic response or expression of a particular protein or antigen. Tissue Specificity,Organ Specificities,Specificities, Organ,Specificities, Tissue,Specificity, Organ,Specificity, Tissue,Tissue Specificities
D005227 Fatty Acids Organic, monobasic acids derived from hydrocarbons by the equivalent of oxidation of a methyl group to an alcohol, aldehyde, and then acid. Fatty acids are saturated and unsaturated (FATTY ACIDS, UNSATURATED). (Grant & Hackh's Chemical Dictionary, 5th ed) Aliphatic Acid,Esterified Fatty Acid,Fatty Acid,Fatty Acids, Esterified,Fatty Acids, Saturated,Saturated Fatty Acid,Aliphatic Acids,Acid, Aliphatic,Acid, Esterified Fatty,Acid, Saturated Fatty,Esterified Fatty Acids,Fatty Acid, Esterified,Fatty Acid, Saturated,Saturated Fatty Acids
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000494 Allosteric Regulation The modification of the reactivity of ENZYMES by the binding of effectors to sites (ALLOSTERIC SITES) on the enzymes other than the substrate BINDING SITES. Regulation, Allosteric,Allosteric Regulations,Regulations, Allosteric
D013058 Mass Spectrometry An analytical method used in determining the identity of a chemical based on its mass using mass analyzers/mass spectrometers. Mass Spectroscopy,Spectrometry, Mass,Spectroscopy, Mass,Spectrum Analysis, Mass,Analysis, Mass Spectrum,Mass Spectrum Analysis,Analyses, Mass Spectrum,Mass Spectrum Analyses,Spectrum Analyses, Mass
D050260 Carbohydrate Metabolism Cellular processes in biosynthesis (anabolism) and degradation (catabolism) of CARBOHYDRATES. Metabolism, Carbohydrate
D055442 Metabolome The dynamic collection of metabolites which represent a cell's or organism's net metabolic response to current conditions. Metabolic Profile,Metabolic Profiles,Metabolomes,Profile, Metabolic,Profiles, Metabolic

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