Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Biological Assembly 3  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 3 assigned by authors.

Macromolecule Content

• Total Structure Weight: 9.50 kDa 
• Atom Count: 525 
• Modelled Residue Count: 72 
• Deposited Residue Count: 90 
• Unique protein chains: 1

2LWA

Conformational ensemble for the G8A mutant of the influenza hemagglutinin fusion peptide

• DOI: 10.2210/pdb2LWA/pdb
• BMRB: 18617

• Classification: MEMBRANE PROTEIN
• Organism(s): Influenza A virus (A/Hong Kong/1035/1998(H1N1))
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2012-07-26 Released: 2012-12-05 
• Deposition Author(s): Lorieau, J.L., Louis, J.M., Schwieters, C.D., Bax, A.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 480 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

pH-triggered, activated-state conformations of the influenza hemagglutinin fusion peptide revealed by NMR.

Lorieau, J.L., Louis, J.M., Schwieters, C.D., Bax, A.

(2012) Proc Natl Acad Sci U S A 109: 19994-19999

• PubMed: 23169643 
• DOI: 10.1073/pnas.1213801109
• Primary Citation of Related Structures:  
  2LWA


• PubMed Abstract: 
  

The highly conserved first 23 residues of the influenza hemagglutinin HA2 subunit constitute the fusion domain, which plays a pivotal role in fusing viral and host-cell membranes. At neutral pH, this peptide adopts a tight helical hairpin wedge structure, stabilized by aliphatic hydrogen bonding and charge-dipole interactions. We demonstrate that at low pH, where the fusion process is triggered, the native peptide transiently visits activated states that are very similar to those sampled by a G8A mutant. This mutant retains a small fraction of helical hairpin conformation, in rapid equilibrium with at least two open structures. The exchange rate between the closed and open conformations of the wild-type fusion peptide is ~40 kHz, with a total open-state population of ~20%. Transitions to these activated states are likely to play a crucial role in formation of the fusion pore, an essential structure required in the final stage of membrane fusion.

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Organizational Affiliation: 

Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HEMAGGLUTININ FUSION PEPTIDE G8A MUTANT	A, B, C	30	Influenza A virus (A/Hong Kong/1035/1998(H1N1))	Mutation(s): 1  Gene Names: HA
Find proteins for Q91IJ0 (Influenza A virus) Explore Q91IJ0  Go to UniProtKB:  Q91IJ0

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 480 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2LWA Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-07-26 
• Released Date: 2012-12-05 
Deposition Author(s): Lorieau, J.L., Louis, J.M., Schwieters, C.D., Bax, A.

Revision History  

• Version 1.0: 2012-12-05
  Type: Initial release
  
• Version 1.1: 2012-12-19
  Changes: Database references
• Version 1.2: 2013-02-20
  Changes: Refinement description