Fiche publication
Date publication
mai 2018
Journal
Cell reports
Auteurs
Membres identifiés du Cancéropôle Est :
Dr REINA-SAN-MARTIN Bernardo
Tous les auteurs :
Souquet B, Freed E, Berto A, Andric V, Audugé N, Reina-San-Martin B, Lacy E, Doye V
Lien Pubmed
Résumé
Nup133 belongs to the Y-complex, a key component of the nuclear pore complex (NPC) scaffold. Studies on a null mutation in mice previously revealed that Nup133 is essential for embryonic development but not for mouse embryonic stem cell (mESC) proliferation. Using single-pore detection and average NE-fluorescence intensity, we find that Nup133 is dispensable for interphase and postmitotic NPC scaffold assembly in pluripotent mESCs. However, loss of Nup133 specifically perturbs the formation of the nuclear basket as manifested by the absence of Tpr in about half of the NPCs combined with altered dynamics of Nup153. We further demonstrate that its central domain mediates Nup133's role in assembling Tpr and Nup153 into a properly configured nuclear basket. Our findings thus revisit the role of the Y-complex in pore biogenesis and provide insights into the interplay between NPC scaffold architecture, nuclear basket assembly, and the generation of heterogeneity among NPCs.
Mots clés
NPC scaffold, Nup133, Nup153, Tpr, biogenesis, dynamics, mouse embryonic stem cells, nuclear basket, nuclear pore, nucleoporin
Référence
Cell Rep. 2018 May 22;23(8):2443-2454
