7RYJ image
Entry Detail
PDB ID:
7RYJ
EMDB ID:
Keywords:
Title:
Cryo EM analysis reveals inherent flexibility of authentic murine papillomavirus capsids
Biological Source:
PDB Version:
Deposition Date:
2021-08-25
Release Date:
2021-11-10
Method Details:
Experimental Method:
Resolution:
3.30 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Major capsid protein L1
Chain IDs:A, B, C, D, E, F
Chain Length:509
Number of Molecules:6
Biological Source:Mus musculus papillomavirus type 1
Ligand Molecules
Primary Citation
Cryo EM Analysis Reveals Inherent Flexibility of Authentic Murine Papillomavirus Capsids.
Viruses 13 ? ? (2021)
PMID: 34696452 DOI: 10.3390/v13102023

Abstact

Human papillomavirus (HPV) is a significant health burden and leading cause of virus-induced cancers. However, studies have been hampered due to restricted tropism that makes production and purification of high titer virus problematic. This issue has been overcome by developing alternative HPV production methods such as virus-like particles (VLPs), which are devoid of a native viral genome. Structural studies have been limited in resolution due to the heterogeneity, fragility, and stability of the VLP capsids. The mouse papillomavirus (MmuPV1) presented here has provided the opportunity to study a native papillomavirus in the context of a common laboratory animal. Using cryo EM to solve the structure of MmuPV1, we achieved 3.3 Å resolution with a local symmetry refinement method that defined smaller, symmetry related subparticles. The resulting high-resolution structure allowed us to build the MmuPV1 asymmetric unit for the first time and identify putative L2 density. We also used our program ISECC to quantify capsid flexibility, which revealed that capsomers move as rigid bodies connected by flexible linkers. The MmuPV1 flexibility was comparable to that of a HPV VLP previously characterized. The resulting MmuPV1 structure is a promising step forward in the study of papillomavirus and will provide a framework for continuing biochemical, genetic, and biophysical research for papillomaviruses.

Legend

Protein

Chemical

Disease

Primary Citation of related structures