su min (violet) hong

read_status: annotated
type: paper
title: Riboregulation of Enolase 1 activity controls glycolysis and embryonic stem cell differentiation
year: 2022
authors:
  - Huppertz, Ina
  - Perez-Perri, Joel I.
  - Mantas, Panagiotis
  - Sekaran, Thileepan
  - Schwarzl, Thomas
  - Russo, Francesco
  - Ferring-Appel, Dunja
  - Koskova, Zuzana
  - Dimitrova-Paternoga, Lyudmila
  - Kafkia, Eleni
  - Hennig, Janosch
  - Neveu, Pierre A.
  - Patil, Kiran
  - Hentze, Matthias W.
journal: Molecular Cell
doi: 10.1016/j.molcel.2022.05.019
url: https://linkinghub.elsevier.com/retrieve/pii/S1097276522004865
project:
  - IGP
system:
  - glycolysis
  - cellular_metabolism
  - embryonic_stem_cells
disease:
  - stem_cell_differentiation
genes:
  - eno1
  - sirt2
processes:
  - rna_binding
  - enzymatic_inhibition
  - metabolic_rewiring
  - protein_acetylation
methods:
  - eclip
  - rna_immunoprecipitation
  - enzymatic_activity_assay
  - stable_isotope_tracing
  - proximity_ligation_assay
key_findings:
  - rna_inhibits_enzyme_activity
  - acetylation_enhances_rna_binding
  - rna_binding_controls_glycolysis
  - metabolic_state_controls_differentiation
limitations:
  - structural_basis_undefined
  - enzyme_specificity_unknown
  - broader_metabolic_scope_unresolved
relevance:
  - conceptual_shift_in_metabolic_control
  - mechanism_linking_metabolism_and_fate
  - regulatory_layer_beyond_transcription
concepts:
  - Riboregulation_of_Metabolic_Enzymes
  - RNA_Mediated_Enzyme_Inhibition
  - Metabolic_Control_of_Cell_Fate
tags:
  - metabolism
  - rna_binding_proteins
  - stem_cells

Abstract

Differentiating stem cells must coordinate their metabolism and fate trajectories. Here, we report that the catalytic activity of the glycolytic enzyme Enolase 1 (ENO1) is directly regulated by RNAs leading to metabolic rewiring in mouse embryonic stem cells (mESCs). We identify RNA ligands that specifically inhibit ENO1’s enzymatic activity in vitro and diminish glycolysis in cultured human cells and mESCs. Pharmacological inhibition or RNAi-mediated depletion of the protein deacetylase SIRT2 increases ENO1’s acetylation and enhances its RNA binding. Similarly, induction of mESC differentiation leads to increased ENO1 acetylation, enhanced RNA binding, and inhibition of glycolysis. Stem cells expressing mutant forms of ENO1 that escape or hyper-activate this regulation display impaired germ layer differentiation. Our findings uncover acetylationdriven riboregulation of ENO1 as a physiological mechanism of glycolytic control and of the regulation of stem cell differentiation. Riboregulation may represent a more widespread principle of biological control.

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