5A32 image
Entry Detail
PDB ID:
5A32
Keywords:
Title:
Electron cryo-microscopy of Cowpea Mosaic Virus containing RNA-1 (CPMVb)
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2015-05-27
Release Date:
2015-12-23
Method Details:
Experimental Method:
Resolution:
3.44 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:RNA2 POLYPROTEIN
Chain IDs:A
Chain Length:189
Number of Molecules:1
Biological Source:COWPEA MOSAIC VIRUS
Polymer Type:polypeptide(L)
Description:RNA2 POLYPROTEIN
Chain IDs:B
Chain Length:369
Number of Molecules:1
Biological Source:COWPEA MOSAIC VIRUS
Ligand Molecules
Primary Citation
Mechanisms of assembly and genome packaging in an RNA virus revealed by high-resolution cryo-EM.
Nat Commun 6 10113 10113 (2015)
PMID: 26657148 DOI: 10.1038/ncomms10113

Abstact

Cowpea mosaic virus is a plant-infecting member of the Picornavirales and is of major interest in the development of biotechnology applications. Despite the availability of >100 crystal structures of Picornavirales capsids, relatively little is known about the mechanisms of capsid assembly and genome encapsidation. Here we have determined cryo-electron microscopy reconstructions for the wild-type virus and an empty virus-like particle, to 3.4 Å and 3.0 Å resolution, respectively, and built de novo atomic models of their capsids. These new structures reveal the C-terminal region of the small coat protein subunit, which is essential for virus assembly and which was missing from previously determined crystal structures, as well as residues that bind to the viral genome. These observations allow us to develop a new model for genome encapsidation and capsid assembly.

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Primary Citation of related structures