Structure of the influenza AM2-BM2 chimeric channel

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 75 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Structural investigation of rimantadine inhibition of the AM2-BM2 chimera channel of influenza viruses.

Pielak, R.M.Oxenoid, K.Chou, J.J.

(2011) Structure 19: 1655-1663

  • DOI: https://doi.org/10.1016/j.str.2011.09.003
  • Primary Citation of Related Structures:  
    2LJB, 2LJC

  • PubMed Abstract: 

    The M2 channel of influenza A is a target of the adamantane family antiviral drugs. Two different drug-binding sites have been reported: one inside the pore, and the other is a lipid-facing pocket. A previous study showed that a chimera of M2 variants from influenza A and B that contains only the pore-binding site is sensitive to amantadine inhibition, suggesting that the primary site of inhibition is inside the pore. To obtain atomic details of channel-drug interaction, we determined the structures of the chimeric channel with and without rimantadine. Inside the channel and near the N-terminal end, methyl groups of Val27 and Ala30 from four subunits form a hydrophobic pocket around the adamantane, and the drug amino group appears to be in polar contact with the backbone oxygen of Ala30. The structures also reveal differences between the drug-bound and -unbound states of the channel that can explain drug resistance.

  • Organizational Affiliation

    Jack and Eileen Connors Structural Biology Laboratory, Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
M2 protein, BM2 protein chimera
A, B, C, D
35Influenza A virus H3N2Influenza B virus (B/Taiwan/70061/2006)
This entity is chimeric
Mutation(s): 1 
Gene Names: BM2
Membrane Entity: Yes 
Find proteins for B4UQM4 (Influenza B virus)
Explore B4UQM4 
Go to UniProtKB:  B4UQM4
Find proteins for Q9YP62 (Influenza A virus H3N2)
Explore Q9YP62 
Go to UniProtKB:  Q9YP62
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsQ9YP62B4UQM4
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 75 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-11-16
    Type: Initial release
  • Version 1.1: 2012-03-21
    Changes: Database references
  • Version 1.2: 2023-06-14
    Changes: Data collection, Database references, Other