4I00 image
Entry Detail
PDB ID:
4I00
Title:
Crystal structure of influenza A neuraminidase N3-H274Y complexed with zanamivir
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2012-11-16
Release Date:
2013-11-13
Method Details:
Experimental Method:
Resolution:
1.60 Å
R-Value Free:
0.17
R-Value Work:
0.15
R-Value Observed:
0.15
Space Group:
I 4
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Neuraminidase
Mutations:H274Y
Chain IDs:A
Chain Length:388
Number of Molecules:1
Biological Source:Influenza A virus
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
ASN A ASN GLYCOSYLATION SITE
Primary Citation
Functional and structural analysis of influenza virus neuraminidase N3 offers further insight into the mechanisms of oseltamivir resistance.
J.Virol. 87 10016 10024 (2013)
PMID: 23824808 DOI: 10.1128/JVI.01129-13

Abstact

The influenza virus neuraminidase H274Y substitution is a highly prevalent amino acid substitution associated with resistance to the most heavily used influenza drug, oseltamivir. Previous structural studies suggest that the group specific 252 residue (Y252 in group 1 and T252 in group 2) might be a key factor underlying H274Y resistance. However, H274Y has only been reported in N1 subtypes, which indicates that there must be additional key residues that determine H274Y resistance. Furthermore, we found that members of NA serotype N3 also possess Y252, raising the key question as to whether or not H274Y resistance may also be possible for some group 2 NAs. Here, we demonstrate that the H274Y substitution results in mild oseltamivir resistance for N3. Comparative structural analysis of N3, N1, and their 274Y variants indicates that the interaction of residue 296 (H in N1 and nonaromatic for other serotypes) with conserved W295 is another important determinant of oseltamivir resistance.

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