Protein interfaces of the conserved Nup84 complex from Chaetomium thermophilum shown by crosslinking mass spectrometry and electron microscopy

• Verfasst von: Thierbach, Karsten [VerfasserIn]
• Verfasst von: Appen, Alexander von [VerfasserIn]
• Verfasst von: Thoms, Matthias [VerfasserIn]
• Verfasst von: Beck, Martin [VerfasserIn]
• Verfasst von: Flemming, Dirk [VerfasserIn]
• Verfasst von: Hurt, Ed [VerfasserIn]
• Titel: Protein interfaces of the conserved Nup84 complex from Chaetomium thermophilum shown by crosslinking mass spectrometry and electron microscopy
• Verf.angabe: Karsten Thierbach, Alexander von Appen, Matthias Thoms, Martin Beck, Dirk Flemming, and Ed Hurt
• E-Jahr: 2013
• Jahr: August 15, 2013
• Umfang: 11 S.
• Fussnoten: Gesehen am 03.02.2022
• Titel Quelle: Enthalten in: Structure
• Ort Quelle: London [u.a.] : Elsevier Science, 1993
• Jahr Quelle: 2013
• Band/Heft Quelle: 21(2013), 9, Seite 1672-1682
• ISSN Quelle: 1878-4186
• DOI: doi:10.1016/j.str.2013.07.004
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1788465369

Abstract

A key building block of the nuclear pore complex (NPC) is the Nup84 subcomplex that has been structurally analyzed predominantly in the yeast system. To expand this analysis and gain insight into the evolutionary conservation of its structure, we reconstituted an octameric Nup84 complex using the subunits from a thermophile, Chaetomium thermophilum (ct). This assembly carries Nup37 and Elys, which are characteristic subunits of the orthologous human Nup107-Nup160 complex but absent from the yeast Saccharomyces cerevisiae. We found that Elys binds cooperatively to the complex requiring both Nup37 and Nup120. Unexpectedly, the reconstituted ctNup84 complex formed a striking dimer structure with an unpredicted side-to-side arrangement of two molecules. Finally, crosslinking mass spectrometry allowed the mapping of key protein interfaces within the Y-shaped complex. Thus, the thermophilic Nup84 complex can serve as a structural model for higher eukaryotic Nup107-Nup160 assemblies to gain insight into its possible configuration within the NPC scaffold.