7NIS image
Entry Detail
PDB ID:
7NIS
EMDB ID:
Keywords:
Title:
1918 H1N1 Viral influenza polymerase heterotrimer with Nb8192 core
Biological Source:
PDB Version:
Deposition Date:
2021-02-13
Release Date:
2021-12-01
Method Details:
Experimental Method:
Resolution:
5.96 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Polymerase acidic protein
Chain IDs:B (auth: A)
Chain Length:716
Number of Molecules:1
Biological Source:Influenza A virus (strain A/Brevig Mission/1/1918 H1N1)
Polymer Type:polypeptide(L)
Description:RNA-directed RNA polymerase catalytic subunit
Chain IDs:C (auth: B)
Chain Length:757
Number of Molecules:1
Biological Source:Influenza A virus (strain A/Brevig Mission/1/1918 H1N1)
Polymer Type:polypeptide(L)
Description:Polymerase basic protein 2,Immunoglobulin G-binding protein A
Chain IDs:D (auth: C)
Chain Length:905
Number of Molecules:1
Biological Source:Influenza A virus (strain A/Brevig Mission/1/1918 H1N1), Staphylococcus aureus
Polymer Type:polyribonucleotide
Description:RNA (5'-R(P*AP*GP*UP*AP*GP*AP*AP*AP*CP*AP*AP*GP*GP*CP*C)-3')
Chain IDs:F (auth: D)
Chain Length:15
Number of Molecules:1
Biological Source:Influenza A virus (A/Brevig Mission/1/1918(H1N1))
Polymer Type:polyribonucleotide
Description:RNA (5'-R(P*GP*GP*CP*CP*UP*GP*CP*U)-3')
Chain IDs:E
Chain Length:17
Number of Molecules:1
Biological Source:Influenza A virus (A/Brevig Mission/1/1918(H1N1))
Polymer Type:polypeptide(L)
Description:Nanobody8192 core
Chain IDs:A (auth: F)
Chain Length:132
Number of Molecules:1
Biological Source:Camelidae mixed library
Ligand Molecules
Primary Citation
Mapping inhibitory sites on the RNA polymerase of the 1918 pandemic influenza virus using nanobodies.
Nat Commun 13 251 251 (2022)
PMID: 35017564 DOI: 10.1038/s41467-021-27950-w

Abstact

Influenza A viruses cause seasonal epidemics and global pandemics, representing a considerable burden to healthcare systems. Central to the replication cycle of influenza viruses is the viral RNA-dependent RNA polymerase which transcribes and replicates the viral RNA genome. The polymerase undergoes conformational rearrangements and interacts with viral and host proteins to perform these functions. Here we determine the structure of the 1918 influenza virus polymerase in transcriptase and replicase conformations using cryo-electron microscopy (cryo-EM). We then structurally and functionally characterise the binding of single-domain nanobodies to the polymerase of the 1918 pandemic influenza virus. Combining these functional and structural data we identify five sites on the polymerase which are sensitive to inhibition by nanobodies. We propose that the binding of nanobodies at these sites either prevents the polymerase from assuming particular functional conformations or interactions with viral or host factors. The polymerase is highly conserved across the influenza A subtypes, suggesting these sites as effective targets for potential influenza antiviral development.

Legend

Protein

Chemical

Disease

Primary Citation of related structures