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TitleStructural Basis of Vesicle Formation at the Inner Nuclear Membrane.
Journal, issue, pagesCell, Vol. 163, Issue 7, Page 1692-1701, Year 2015
Publish dateDec 17, 2015
AuthorsChristoph 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 Bäuerlein / Juliana Cheleski / Stephan Werner / Peter Guttmann / Stefan Rehbein / Katja Henzler / Justin Demmerle / Barbara Adler / Ulrich Koszinowski / Lothar Schermelleh / Gerd Schneider / Lynn W Enquist / Jürgen M Plitzko / Thomas C Mettenleiter / Kay Grünewald /
PubMed AbstractVesicular 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 ...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.
External linksCell / PubMed:26687357 / PubMed Central
MethodsEM (subtomogram averaging)
Resolution35.0 Å
Structure data

EMDB-3197:
Sub-tomogram averaging of electron cryo-microscopic data taken from focused-ion beam milled lamellae of nuclei of Pseudorabies virus (PrV) nuclear egress complex-expressing cells
Method: EM (subtomogram averaging) / Resolution: 35.0 Å

EMDB-3215:
Sub-tomogram averaging of electron cryo-microscopic data taken from focused-ion beam milled lamellae of nuclei of Pseudorabies virus (PrV) nuclear egress complex-expressing cells
Method: EM (subtomogram averaging) / Resolution: 35.0 Å

Source
  • Sus scrofa (pig)

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