Lysosomal Signaling Licenses Embryonic Stem Cell Differentiation via Inactivation of Tfe3.
Fiche publication
Date publication
décembre 2018
Journal
Cell stem cell
Auteurs
Membres identifiés du Cancéropôle Est :
Pr FAIVRE Laurence, Pr VABRES Pierre, Pr KUENTZ Paul
Tous les auteurs :
Villegas F, Lehalle D, Mayer D, Rittirsch M, Stadler MB, Zinner M, Olivieri D, Vabres P, Duplomb-Jego L, De Bont ESJM, Duffourd Y, Duijkers F, Avila M, Geneviève D, Houcinat N, Jouan T, Kuentz P, Lichtenbelt KD, Thauvin-Robinet C, St-Onge J, Thevenon J, van Gassen KLI, van Haelst M, van Koningsbruggen S, Hess D, Smallwood SA, Rivière JB, Faivre L, Betschinger J
Lien Pubmed
Résumé
Self-renewal and differentiation of pluripotent murine embryonic stem cells (ESCs) is regulated by extrinsic signaling pathways. It is less clear whether cellular metabolism instructs developmental progression. In an unbiased genome-wide CRISPR/Cas9 screen, we identified components of a conserved amino-acid-sensing pathway as critical drivers of ESC differentiation. Functional analysis revealed that lysosome activity, the Ragulator protein complex, and the tumor-suppressor protein Folliculin enable the Rag GTPases C and D to bind and seclude the bHLH transcription factor Tfe3 in the cytoplasm. In contrast, ectopic nuclear Tfe3 represses specific developmental and metabolic transcriptional programs that are associated with peri-implantation development. We show differentiation-specific and non-canonical regulation of Rag GTPase in ESCs and, importantly, identify point mutations in a Tfe3 domain required for cytoplasmic inactivation as potentially causal for a human developmental disorder. Our work reveals an instructive and biomedically relevant role of metabolic signaling in licensing embryonic cell fate transitions.
Mots clés
Flcn, Rag GTPases, Ragulator, Tfe3, developmental disorder, differentiation, embryonic stem cell, mTOR, pluripotency
Référence
Cell Stem Cell. 2018 Dec 23;: