39HQ | pdb_000039hq

Structure of Fab 04-1D02 in complex with hemagglutinin from influenza A (A/Hawaii/70/2019) H1N1

• PDB DOI: https://doi.org/10.2210/pdb39HQ/pdb
• EM Map EMD-79499: EMDB EMDataResource

• Classification: VIRAL PROTEIN/IMMUNE SYSTEM
• Organism(s): Influenza A virus, Homo sapiens
• Expression System: Spodoptera frugiperda, Homo sapiens
• Mutation(s): No 


• Deposited: 2026-10-08 Released: 2026-10-21 
• Deposition Author(s): Pholcharee, T., Wu, N.C.
• Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)

---

Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.21 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Mapping the Structural and Functional Landscape of Human Cross-Group Antibodies Targeting the Influenza A Hemagglutinin Stem

Pholcharee, T., Lv, H., Wu, N.C.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C3  (Explore in 3D)
Global Stoichiometry: Hetero 12-mer - A3B3C3D3 Pseudo Symmetry: Cyclic - C3  (Explore in 3D)
Pseudo Stoichiometry: Hetero 12-mer - A6B3C3 

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

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 244.99 kDa 
• Atom Count: 16,141 
• Modeled Residue Count: 2,073 
• Deposited Residue Count: 2,205 
• Unique protein chains: 4

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Hemagglutinin	A, B [auth C], C [auth E]	327	Influenza A virus	Mutation(s): 0  Gene Names: HA
UniProt
Find proteins for A0A7U0YFD5 (Influenza A virus) Explore A0A7U0YFD5  Go to UniProtKB:  A0A7U0YFD5

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Heavy chain variable domain of Fab 04-1D02	D [auth H], E [auth I], H [auth M]	124	Homo sapiens	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Light chain variable domain of Fab 04-1D02	F [auth J], G [auth L], I [auth N]	110	Homo sapiens	Mutation(s): 0

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
Hemagglutinin	J [auth B], K [auth D], L [auth F]	174	Influenza A virus	Mutation(s): 0  Gene Names: HA
UniProt
Find proteins for A0A7U3R9T0 (Influenza A virus) Explore A0A7U3R9T0  Go to UniProtKB:  A0A7U3R9T0

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.21 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-10-21 
Deposition Author(s): Pholcharee, T., Wu, N.C.

---

Funding Organization	Location	Grant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	NIH R01 AI201339

Revision History  

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