7PVD image
Entry Detail
PDB ID:
7PVD
EMDB ID:
Keywords:
Title:
Structure of the membrane soluble spike complex from the Lassa virus in a C1-symmetric map focused on the ectodomain
Biological Source:
PDB Version:
Deposition Date:
2021-10-02
Release Date:
2021-12-29
Method Details:
Experimental Method:
Resolution:
3.70 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Pre-glycoprotein polyprotein GP complex
Chain IDs:D (auth: A), E (auth: B), F (auth: C)
Chain Length:259
Number of Molecules:3
Biological Source:Lassa virus (strain Mouse/Sierra Leone/Josiah/1976)
Polymer Type:polypeptide(L)
Description:Glycoprotein G2
Chain IDs:A (auth: a), B (auth: b), C (auth: c)
Chain Length:259
Number of Molecules:3
Biological Source:Lassa virus (strain Mouse/Sierra Leone/Josiah/1976)
Ligand Molecules
Primary Citation
Structure and receptor recognition by the Lassa virus spike complex.
Nature 603 174 179 (2022)
PMID: 35173332 DOI: 10.1038/s41586-022-04429-2

Abstact

Lassa virus (LASV) is a human pathogen, causing substantial morbidity and mortality1,2. Similar to other Arenaviridae, it presents a class-I spike complex on its surface that facilitates cell entry. The virus's cellular receptor is matriglycan, a linear carbohydrate that is present on α-dystroglycan3,4, but the molecular mechanism that LASV uses to recognize this glycan is unknown. In addition, LASV and other arenaviruses have a unique signal peptide that forms an integral and functionally important part of the mature spike5-8; yet the structure, function and topology of the signal peptide in the membrane remain uncertain9-11. Here we solve the structure of a complete native LASV spike complex, finding that the signal peptide crosses the membrane once and that its amino terminus is located in the extracellular region. Together with a double-sided domain-switching mechanism, the signal peptide helps to stabilize the spike complex in its native conformation. This structure reveals that the LASV spike complex is preloaded with matriglycan, suggesting the mechanism of binding and rationalizing receptor recognition by α-dystroglycan-tropic arenaviruses. This discovery further informs us about the mechanism of viral egress and may facilitate the rational design of novel therapeutics that exploit this binding site.

Legend

Protein

Chemical

Disease

Primary Citation of related structures