4LD8 image
Entry Detail
PDB ID:
4LD8
Keywords:
Title:
Crystal Structure of Dimeric Sudan Virus VP40
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2013-06-24
Release Date:
2013-08-21
Method Details:
Experimental Method:
Resolution:
1.83 Å
R-Value Free:
0.21
R-Value Work:
0.18
R-Value Observed:
0.18
Space Group:
C 1 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Matrix protein VP40
Chain IDs:A
Chain Length:297
Number of Molecules:1
Biological Source:Sudan ebolavirus
Primary Citation
Structural Rearrangement of Ebola Virus VP40 Begets Multiple Functions in the Virus Life Cycle.
Cell(Cambridge,Mass.) 154 763 774 (2013)
PMID: 23953110 DOI: 10.1016/j.cell.2013.07.015

Abstact

Proteins, particularly viral proteins, can be multifunctional, but the mechanisms behind multifunctionality are not fully understood. Here, we illustrate through multiple crystal structures, biochemistry, and cellular microscopy that VP40 rearranges into different structures, each with a distinct function required for the ebolavirus life cycle. A butterfly-shaped VP40 dimer traffics to the cellular membrane. Once there, electrostatic interactions trigger rearrangement of the polypeptide into a linear hexamer. These hexamers construct a multilayered, filamentous matrix structure that is critical for budding and resembles tomograms of authentic virions. A third structure of VP40, formed by a different rearrangement, is not involved in virus assembly but instead uniquely binds RNA to regulate viral transcription inside infected cells. These results provide a functional model for ebolavirus matrix assembly and the other roles of VP40 in the virus life cycle and demonstrate how a single wild-type, unmodified polypeptide can assemble into different structures for different functions.

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