Structural Basis of Vesicle Formation at the Inner Nuclear Membrane

Christoph Hagen, Kyle C. Dent, Tzviya Zeev-Ben-Mordehai, Michael Grange, Jens B. Bosse, Cathy Whittle, Barbara G. Klupp, C. Alistair Siebert, Daven Vasishtan, Felix J. B. Baeuerlein, Juliana Cheleski, Stephan Werner, Peter Guttmann, Stefan Rehbein, Katja Henzler, Justin Demmerle, Barbara Adler, Ulrich Koszinowski, Lothar Schermelleh, Gerd SchneiderLynn W. Enquist, Juergen M. Plitzko, Thomas C. Mettenleiter, Kay Gruenewald

Research output: Contribution to journalArticleAcademicpeer-review


Vesicular nucleo-cytoplasmic transport is becoming recognized as a general cellular mechanism for translocation of large cargoes across the nuclear envelope. Cargo is recruited, enveloped at the inner nuclear membrane (INM), and delivered by membrane fusion at the outer nuclear membrane. To understand the structural underpinning for this trafficking, we investigated nuclear egress of progeny herpesvirus capsids where capsid envelopment is mediated by two viral proteins, forming the nuclear egress complex (NEC). Using a multi-modal imaging approach, we visualized the NEC in situ forming coated vesicles of defined size. Cellular electron cryo-tomography revealed a protein layer showing two distinct hexagonal lattices at its membrane-proximal and membrane-distant faces, respectively. NEC coat architecture was determined by combining this information with integrative modeling using small-angle X-ray scattering data. The molecular arrangement of the NEC establishes the basic mechanism for budding and scission of tailored vesicles at the INM.
Original languageEnglish
Pages (from-to)1692-1701
Number of pages10
Issue number7
Publication statusPublished - 17 Dec 2015
Externally publishedYes


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