8USN image
Entry Detail
PDB ID:
8USN
EMDB ID:
Keywords:
Title:
Intracellular cryo-tomography structure of EBOV nucleocapsid at 8.9 Angstrom
Biological Source:
Host Organism:
PDB Version:
Deposition Date:
2023-10-27
Release Date:
2024-10-02
Method Details:
Experimental Method:
Resolution:
8.90 Å
Aggregation State:
CELL
Reconstruction Method:
SUBTOMOGRAM AVERAGING
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Nucleoprotein
Chain IDs:A, B, E
Chain Length:739
Number of Molecules:3
Biological Source:Ebola virus - Mayinga, Zaire, 1976
Polymer Type:polyribonucleotide
Description:RNA (5'-R(*AP*AP*AP*AP*AP*A)-3')
Chain IDs:C, D
Chain Length:6
Number of Molecules:2
Biological Source:Zaire
Polymer Type:polypeptide(L)
Description:Membrane-associated protein VP24
Chain IDs:F (auth: I), G (auth: J)
Chain Length:251
Number of Molecules:2
Biological Source:Ebola virus - Mayinga, Zaire, 1976
Polymer Type:polypeptide(L)
Description:Polymerase cofactor VP35
Chain IDs:H (auth: K), I (auth: F)
Chain Length:340
Number of Molecules:2
Biological Source:Ebola virus - Mayinga, Zaire, 1976
Ligand Molecules
Primary Citation
Intracellular Ebola virus nucleocapsid assembly revealed by in situ cryo-electron tomography.
Cell 187 5587 5603.e19 (2024)
PMID: 39293445 DOI: 10.1016/j.cell.2024.08.044

Abstact

Filoviruses, including the Ebola and Marburg viruses, cause hemorrhagic fevers with up to 90% lethality. The viral nucleocapsid is assembled by polymerization of the nucleoprotein (NP) along the viral genome, together with the viral proteins VP24 and VP35. We employed cryo-electron tomography of cells transfected with viral proteins and infected with model Ebola virus to illuminate assembly intermediates, as well as a 9 Å map of the complete intracellular assembly. This structure reveals a previously unresolved third and outer layer of NP complexed with VP35. The intrinsically disordered region, together with the C-terminal domain of this outer layer of NP, provides the constant width between intracellular nucleocapsid bundles and likely functions as a flexible tether to the viral matrix protein in the virion. A comparison of intracellular nucleocapsids with prior in-virion nucleocapsid structures reveals that the nucleocapsid further condenses vertically in the virion. The interfaces responsible for nucleocapsid assembly are highly conserved and offer targets for broadly effective antivirals.

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Primary Citation of related structures