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

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

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

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.

Original languageEnglish
Article numbereabm3452
JournalScience
Volume379
Issue number6636
DOIs
StatePublished - 10 Mar 2023

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