6H9V image
Entry Detail
PDB ID:
6H9V
Keywords:
Title:
Crystal structure of deaminated P domain from norovirus strain Saga GII-4 in complex with Fuc
Biological Source:
PDB Version:
Deposition Date:
2018-08-06
Release Date:
2019-04-03
Method Details:
Experimental Method:
Resolution:
1.52 Å
R-Value Free:
0.18
R-Value Work:
0.14
R-Value Observed:
0.14
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:VP1
Chain IDs:A, B
Chain Length:309
Number of Molecules:2
Biological Source:Norovirus Hu/GII-4/Saga4/2006/JP
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
IAS A ASN modified residue
Primary Citation
A post-translational modification of human Norovirus capsid protein attenuates glycan binding.
Nat Commun 10 1320 1320 (2019)
PMID: 30899001 DOI: 10.1038/s41467-019-09251-5

Abstact

Attachment of human noroviruses to histo blood group antigens (HBGAs) is essential for infection, but how this binding event promotes the infection of host cells is unknown. Here, we employ protein NMR experiments supported by mass spectrometry and crystallography to study HBGA binding to the P-domain of a prevalent virus strain (GII.4). We report a highly selective transformation of asparagine 373, located in an antigenic loop adjoining the HBGA binding site, into an iso-aspartate residue. This spontaneous post-translational modification (PTM) proceeds with an estimated half-life of a few days at physiological temperatures, independent of the presence of HBGAs but dramatically affecting HBGA recognition. Sequence conservation and the surface-exposed position of this PTM suggest an important role in infection and immune recognition for many norovirus strains.

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Primary Citation of related structures