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Protein Structures and Oligomeric States

Enter a protein name, UniProt accession or PDB ID. Name searches ask you to confirm the protein identity before related structures are queried.

Current Protein Identity：G8EHJ9 New Search
3PDB entries
4Biological assembly
4chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification Different assembly state Different ligand/ion Different experimental conditions Different structure-quality metrics

Difference tags compare only the current result set; every original PDB and assembly record remains separate.

Related-Structure Differences

Each row represents one biological assembly in one PDB entry; multiple monomers of the same protein are listed separately.

PDB Entry Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Experimental Method Experimental Conditions Structure Quality
8TY7 Crystal structure of 05.GC.w2.3C10 Fab in complex with H1 HA from A/California/04/2009(H1N1) Deposited 2023-08-24 Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: dodecameric（12） Consistent with protein count
Chain A 18–344（327 aa） Fragment：HA1 subdomain (UNP residues 18-344)
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 9 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；0.2 M sodium acetate, pH 6.4, 18% PEG3350
Resolution 3.21 Å R-free 0.288
9Y3X Crystal structure of hemagglutinin from H1N1 Influenza A virus A/California/04/2009 bound to the 3_H2 antibody Deposited 2025-09-02 Assembly 1 Other combination Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain E 18–340（323 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；291 K；0.2M Tri-potassium citrate, 20% (w/v) PEG3350, pH 8.3
Resolution 3.39 Å R-free 0.261
9Y3Y Crystal structure of hemagglutinin from H1N1 Influenza A virus A/California/04/2009 bound to the 49_C09 antibody Deposited 2025-09-02 Assembly 1 Other combination Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain C 18–340（323 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；291 K；2M ammonium sulfate, 15% (v/v) ethylene glycol, 0.2M lithium sulfate, 0.1M CAPS, pH 10.5
Resolution 3.80 Å R-free 0.240
9Y3Y Crystal structure of hemagglutinin from H1N1 Influenza A virus A/California/04/2009 bound to the 49_C09 antibody Deposited 2025-09-02 Assembly 2 Other combination Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 18–340（323 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；291 K；2M ammonium sulfate, 15% (v/v) ethylene glycol, 0.2M lithium sulfate, 0.1M CAPS, pH 10.5
Resolution 3.80 Å R-free 0.240

This page presents structural evidence recorded in PDB/mmCIF.“No recorded non-water small molecule” does not prove that the experimental sample was ligand-free; experimental conditions belong to the PDB experiment, while ligands and copy counts are shown for each biological assembly.