6I3H

Crystal structure of influenza A virus M1 N-terminal domain (G18A mutation)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.207 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Influenza virus uses transportin 1 for vRNP debundling during cell entry.

Miyake, Y.Keusch, J.J.Decamps, L.Ho-Xuan, H.Iketani, S.Gut, H.Kutay, U.Helenius, A.Yamauchi, Y.

(2019) Nat Microbiol 4: 578-586

  • DOI: 10.1038/s41564-018-0332-2
  • Primary Citation of Related Structures:  
    6I3H

  • PubMed Abstract: 
  • Influenza A virus is a pathogen of great medical impact. To develop novel antiviral strategies, it is essential to understand the molecular aspects of virus-host cell interactions in detail. During entry, the viral ribonucleoproteins (vRNPs) that carry the RNA genome must be released from the incoming particle before they can enter the nucleus for replication ...

    Influenza A virus is a pathogen of great medical impact. To develop novel antiviral strategies, it is essential to understand the molecular aspects of virus-host cell interactions in detail. During entry, the viral ribonucleoproteins (vRNPs) that carry the RNA genome must be released from the incoming particle before they can enter the nucleus for replication. The uncoating process is facilitated by histone deacetylase 6 (ref. 1 ). However, the precise mechanism of shell opening and vRNP debundling is unknown. Here, we show that transportin 1, a member of the importin-β family proteins, binds to a PY-NLS 2 sequence motif close to the amino terminus of matrix protein (M1) exposed during acid priming of the viral core. It promotes the removal of M1 and induces disassembly of vRNP bundles. Next, the vRNPs interact with importin-α/β and enter the nucleus. Thus, influenza A virus uses dual importin-βs for distinct steps in host cell entry.


    Organizational Affiliation

    School of Cellular and Molecular Medicine, Faculty of Life Sciences, University of Bristol, Bristol, UK. yohei.yamauchi@bristol.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Matrix protein 1A, B177Influenza A virusMutation(s): 1 
UniProt
Find proteins for P05777 (Influenza A virus (strain A/Wilson-Smith/1933 H1N1))
Explore P05777 
Go to UniProtKB:  P05777
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download Ideal Coordinates CCD File 
C [auth A], D [auth B]PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.207 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 35.56α = 89.71
b = 35.58β = 84.4
c = 69.29γ = 69.02
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Switzerland--

Revision History  (Full details and data files)

  • Version 1.0: 2019-09-18
    Type: Initial release