12KX | pdb_000012kx

Crystal structure of H5 hemagglutinin D190/H226 from the A/British_Columbia/PHL-2032/2024 (H5N1)

• PDB DOI: https://doi.org/10.2210/pdb12KX/pdb

• Classification: VIRAL PROTEIN
• Organism(s): Influenza A virus
• Expression System: Spodoptera aff. frugiperda 1 BOLD-2017
• Mutation(s): Yes 


• Deposited: 2026-04-10 Released: 2026-10-21 
• Deposition Author(s): Lin, T.H., Zhu, Y., Wilson, I.A.
• Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.62 Å
• R-Value Free: 
  0.293 (Depositor), 0.293 (DCC) 
• R-Value Work: 
  0.254 (Depositor), 0.253 (DCC) 
• R-Value Observed: 
  0.256 (Depositor) 

Starting Model: experimental

Literature

Structural and functional characterization of hemagglutinin E190D and Q226H minor variants in human H5N1 A/British_Columbia/PHL-2032/2024 in citation information

Lin, T.H., Zhu, X., Santos, J.S.J., Wang, S., Babarinde, S., Yu, W., McBride, R., Paulson, J.C., Hensley, S.E., Wilson, I.A.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C3  (Explore in 3D)
Global Stoichiometry: Hetero 6-mer - A3B3 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 171.3 kDa 
• Atom Count: 12,000 
• Modeled Residue Count: 1,488 
• Deposited Residue Count: 1,491 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Hemagglutinin HA1	A [auth I], C [auth A], E [auth C]	323	Influenza A virus	Mutation(s): 2  Gene Names: HA
Glycosylation
Glycosylation Sites: 3

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Hemagglutinin HA2	B [auth J], D [auth B], F [auth D]	174	Influenza A virus	Mutation(s): 0  Gene Names: HA
UniProt
Find proteins for A0A8E4IDS0 (Influenza A virus) Explore A0A8E4IDS0  Go to UniProtKB:  A0A8E4IDS0

Oligosaccharides

Help  

Entity ID: 3
Molecule	Chains	Length	2D Diagram	Glycosylation	D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	G [auth E]	2		N-Glycosylation

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	H [auth I], I, J [auth A], K [auth A], L [auth C], M [auth C], N [auth C]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.62 Å
• R-Value Free:  0.293 (Depositor), 0.293 (DCC) 
• R-Value Work:  0.254 (Depositor), 0.253 (DCC) 
• R-Value Observed: 0.256 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 72.023	α = 90
b = 157.442	β = 90
c = 164.001	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
PDB_EXTRACT	data extraction
HKL-3000	data reduction
HKL-3000	data scaling
PHASER	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-10-21 
Deposition Author(s): Lin, T.H., Zhu, Y., Wilson, I.A.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	75N93021C00015

Revision History  

• Version 1.0: 2026-10-21
  Type: Initial release