← Back to search

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：P03437 New Search
43PDB entries
49Biological assembly
174chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification Different assembly state Different ligand/ion Different experimental method 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
1EO8 INFLUENZA VIRUS HEMAGGLUTININ COMPLEXED WITH A NEUTRALIZING ANTIBODY Deposited 2000-03-22 Assembly 1 Other combination Heteromer；Protein × 12 PDB declaration: dodecameric（12） Consistent with protein count
Chain A 17–344（328 aa） Fragment：BROMELAIN RELEASED FRAGMENT
Chain B 346–520（175 aa） Fragment：BROMELAIN RELEASED FRAGMENT
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6；293 K；28%(w:v) PEG 600, 100 mM Sodium Phosphate, 150 mM NaCl, 0.05% NaN3 , pH 6.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K
Resolution 2.80 Å R-free 0.298
1FYT CRYSTAL STRUCTURE OF A COMPLEX OF A HUMAN ALPHA/BETA-T CELL RECEPTOR, INFLUENZA HA ANTIGEN PEPTIDE, AND MHC CLASS II MOLECULE, HLA-DR1 Deposited 2000-10-03 Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain C 322–334（13 aa） Fragment：ANTIGEN PEPTIDE
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；291 K；11% PEG 8000, 1 M NaCl, 100 mM HEPES, pH 7.0, VAPOR DIFFUSION, SITTING DROP, temperature 18K
Resolution 2.60 Å R-free 0.255
1HA0 HEMAGGLUTININ PRECURSOR HA0 Deposited 1998-10-08 Assembly 1 Other combination Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 25–518（494 aa） Fragment：HA1, HA2
Mutation：R329Q NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 X-RAY DIFFRACTION
X-ray crystallization conditions pH 7.5；pH 7.50
Resolution 2.80 Å R-free 0.302
1HGD BINDING OF INFLUENZA VIRUS HEMAGGLUTININ TO ANALOGS OF ITS CELL-SURFACE RECEPTOR, SIALIC ACID: ANALYSIS BY PROTON NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY AND X-RAY CRYSTALLOGRAPHY Deposited 1991-11-01 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 17–344（328 aa）
Chain B 346–520（175 aa）
Chain C 17–344（328 aa）
Chain D 346–520（175 aa）
Chain E 17–344（328 aa）
Chain F 346–520（175 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 12 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.70 Å
1HGE BINDING OF INFLUENZA VIRUS HEMAGGLUTININ TO ANALOGS OF ITS CELL-SURFACE RECEPTOR, SIALIC ACID: ANALYSIS BY PROTON NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY AND X-RAY CRYSTALLOGRAPHY Deposited 1991-11-01 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 17–344（328 aa）
Chain B 346–520（175 aa）
Chain C 17–344（328 aa）
Chain D 346–520（175 aa）
Chain E 17–344（328 aa）
Chain F 346–520（175 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 12 MNA 2-O-methyl-5-N-acetyl-alpha-D-neuraminic acid × 3 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.60 Å
1HGF BINDING OF INFLUENZA VIRUS HEMAGGLUTININ TO ANALOGS OF ITS CELL-SURFACE RECEPTOR, SIALIC ACID: ANALYSIS BY PROTON NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY AND X-RAY CRYSTALLOGRAPHY Deposited 1991-11-01 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 17–344（328 aa）
Chain B 346–520（175 aa）
Chain C 17–344（328 aa）
Chain D 346–520（175 aa）
Chain E 17–344（328 aa）
Chain F 346–520（175 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 12 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 3.00 Å
1HGG BINDING OF INFLUENZA VIRUS HEMAGGLUTININ TO ANALOGS OF ITS CELL-SURFACE RECEPTOR, SIALIC ACID: ANALYSIS BY PROTON NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY AND X-RAY CRYSTALLOGRAPHY Deposited 1991-11-01 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 17–344（328 aa）
Chain B 346–520（175 aa）
Chain C 17–344（328 aa）
Chain D 346–520（175 aa）
Chain E 17–344（328 aa）
Chain F 346–520（175 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 12 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.90 Å
1HGH BINDING OF INFLUENZA VIRUS HEMAGGLUTININ TO ANALOGS OF ITS CELL-SURFACE RECEPTOR, SIALIC ACID: ANALYSIS BY PROTON NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY AND X-RAY CRYSTALLOGRAPHY Deposited 1991-11-01 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 17–344（328 aa）
Chain B 346–520（175 aa）
Chain C 17–344（328 aa）
Chain D 346–520（175 aa）
Chain E 17–344（328 aa）
Chain F 346–520（175 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 12 MNA 2-O-methyl-5-N-acetyl-alpha-D-neuraminic acid × 6 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.70 Å
1HGI BINDING OF INFLUENZA VIRUS HEMAGGLUTININ TO ANALOGS OF ITS CELL-SURFACE RECEPTOR, SIALIC ACID: ANALYSIS BY PROTON NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY AND X-RAY CRYSTALLOGRAPHY Deposited 1991-11-01 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 17–344（328 aa）
Chain B 346–520（175 aa）
Chain C 17–344（328 aa）
Chain D 346–520（175 aa）
Chain E 17–344（328 aa）
Chain F 346–520（175 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 12 ANA methyl 4-O-acetyl-5-acetamido-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosidonic acid × 3 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.70 Å
1HGJ BINDING OF INFLUENZA VIRUS HEMAGGLUTININ TO ANALOGS OF ITS CELL-SURFACE RECEPTOR, SIALIC ACID: ANALYSIS BY PROTON NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY AND X-RAY CRYSTALLOGRAPHY Deposited 1991-11-01 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 17–344（328 aa）
Chain B 346–520（175 aa）
Chain C 17–344（328 aa）
Chain D 346–520（175 aa）
Chain E 17–344（328 aa）
Chain F 346–520（175 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 12 AMN methyl 5-acetamido-9-amino-3,5,9-trideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosidonic acid × 3 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.70 Å
1HTM STRUCTURE OF INFLUENZA HAEMAGGLUTININ AT THE PH OF MEMBRANE FUSION Deposited 1994-11-02 Assembly 1 Protein homooligomer Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 17–43（27 aa）
Chain B 383–520（138 aa）
Chain C 17–43（27 aa）
Chain D 383–520（138 aa）
Chain E 17–43（27 aa）
Chain F 383–520（138 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.50 Å R-free 0.291
1J8H Crystal Structure of a Complex of a Human alpha/beta-T cell Receptor, Influenza HA Antigen Peptide, and MHC Class II Molecule, HLA-DR4 Deposited 2001-05-21 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain C 322–334（13 aa） Fragment：Antigen Peptide
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；291 K；13% PEG 8000, 1 M NaCl, 100 mM HEPES, pH 7.0, VAPOR DIFFUSION, SITTING DROP, temperature 291K
Resolution 2.40 Å R-free 0.246
1KEN INFLUENZA VIRUS HEMAGGLUTININ COMPLEXED WITH AN ANTIBODY THAT PREVENTS THE HEMAGGLUTININ LOW PH FUSOGENIC TRANSITION Deposited 2001-11-16 Assembly 1 Other combination Heteromer；Protein × 10 PDB declaration: decameric（10） Consistent with protein count
Chain B 346–520（175 aa） Fragment：FAB fragment of antibody
Chain D 346–520（175 aa） Fragment：FAB fragment of antibody
Chain F 346–520（175 aa） Fragment：FAB fragment of antibody
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；293 K；peg 20000, calcium chloride, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K
Resolution 3.50 Å R-free 0.323
1QFU INFLUENZA VIRUS HEMAGGLUTININ COMPLEXED WITH A NEUTRALIZING ANTIBODY Deposited 1999-04-14 Assembly 1 Other combination Heteromer；Protein × 12 PDB declaration: dodecameric（12） Consistent with protein count
Chain A 17–344（328 aa） Fragment：BROMELAIN DIGESTED
Chain B 346–520（175 aa） Fragment：BROMELAIN DIGESTED
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 9 X-RAY DIFFRACTION
X-ray crystallization conditions pH 7；pH 7.0
Resolution 2.80 Å R-free 0.284
1QU1 CRYSTAL STRUCTURE OF EHA2 (23-185) Deposited 1999-07-05 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 376–530（155 aa）
Chain B 376–530（155 aa）
Chain C 376–530（155 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions pH 4.4；2% PEG 4000, 30-150 MM NACL, pH 4.40
Resolution 1.90 Å R-free 0.250
1QU1 CRYSTAL STRUCTURE OF EHA2 (23-185) Deposited 1999-07-05 Assembly 2 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain D 376–530（155 aa）
Chain E 376–530（155 aa）
Chain F 376–530（155 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions pH 4.4；2% PEG 4000, 30-150 MM NACL, pH 4.40
Resolution 1.90 Å R-free 0.250
2HMG REFINEMENT OF THE INFLUENZA VIRUS HEMAGGLUTININ BY SIMULATED ANNEALING Deposited 1989-09-11 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 17–344（328 aa）
Chain B 346–520（175 aa）
Chain C 17–344（328 aa）
Chain D 346–520（175 aa）
Chain E 17–344（328 aa）
Chain F 346–520（175 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 12 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 3.00 Å
2VIR INFLUENZA VIRUS HEMAGGLUTININ COMPLEXED WITH A NEUTRALIZING ANTIBODY Deposited 1997-12-22 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain C 44–325（282 aa） Fragment：;PROTEOLYTIC FRAGMENT "HA TOP" CONTAINING HA1 RESIDUES 28 - 328 ;
Not recorded ZN ZINC ION × 3 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 3.25 Å R-free 0.249
2VIS INFLUENZA VIRUS HEMAGGLUTININ, (ESCAPE) MUTANT WITH THR 131 REPLACED BY ILE, COMPLEXED WITH A NEUTRALIZING ANTIBODY Deposited 1997-12-22 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain C 44–325（282 aa） Fragment：;PROTEOLYTIC FRAGMENT "HA TOP" CONTAINING HA1 RESIDUES 28 - 328 ;
Mutation：T131I ZN ZINC ION × 3 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 3.25 Å R-free 0.267
2VIT INFLUENZA VIRUS HEMAGGLUTININ, MUTANT WITH THR 155 REPLACED BY ILE, COMPLEXED WITH A NEUTRALIZING ANTIBODY Deposited 1997-12-22 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain C 44–325（282 aa） Fragment：;PROTEOLYTIC FRAGMENT "HA TOP" CONTAINING HA1 RESIDUES 28 - 328 ;
Mutation：T155I ZN ZINC ION × 3 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 3.25 Å R-free 0.237
2VIU INFLUENZA VIRUS HEMAGGLUTININ Deposited 1997-12-22 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 17–344（328 aa）
Chain B 346–520（175 aa）
Mutation：CHAIN A, T131I Mutation：CHAIN A, T131I NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 15 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.50 Å R-free 0.242
2YPG Haemagglutinin of 1968 Human H3N2 Virus in Complex with Human Receptor Analogue LSTc Deposited 2012-10-30 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 17–344（328 aa）
Chain B 346–520（175 aa） Fragment：HA2 OF BROMELAIN RELEASED ECTODOMAIN, RESIDUES 346-520
Chain C 17–344（328 aa）
Chain D 346–520（175 aa） Fragment：HA2 OF BROMELAIN RELEASED ECTODOMAIN, RESIDUES 346-520
Chain E 17–344（328 aa）
Chain F 346–520（175 aa） Fragment：HA2 OF BROMELAIN RELEASED ECTODOMAIN, RESIDUES 346-520
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 5 FLC CITRATE ANION × 13 X-RAY DIFFRACTION
X-ray crystallization conditions 1.7-2 M TRIAMMONIUM CITRATE PH 6.5
Resolution 2.85 Å R-free 0.190
3EYM Structure of Influenza Haemagglutinin in complex with an inhibitor of membrane fusion Deposited 2008-10-21 Assembly 1 Protein homooligomer Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 25–345（321 aa）
Chain B 346–517（172 aa）
Chain C 25–345（321 aa）
Chain D 346–517（172 aa）
Chain E 25–345（321 aa）
Chain F 346–517（172 aa）
Not recorded EYK 2-tert-butylbenzene-1,4-diol × 3 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；293 K；Ammonium citratre, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K
Resolution 2.80 Å R-free 0.217
3HMG REFINEMENT OF THE INFLUENZA VIRUS HEMAGGLUTININ BY SIMULATED ANNEALING Deposited 1989-09-11 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 17–344（328 aa）
Chain B 346–520（175 aa）
Chain C 17–344（328 aa）
Chain D 346–520（175 aa）
Chain E 17–344（328 aa）
Chain F 346–520（175 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 12 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.90 Å
3VUN Crystal structure of a influenza A virus (A/Aichi/2/1968 H3N2) hemagglutinin in C2 space group. Deposited 2012-07-02 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 17–345（329 aa）
Chain B 346–520（175 aa）
Chain C 17–345（329 aa）
Chain D 346–520（175 aa）
Chain E 17–345（329 aa）
Chain F 346–520（175 aa）
Mutation：G144S, I182V Mutation：E132D Mutation：G144S, I182V Mutation：E132D Mutation：G144S, I182V Mutation：E132D NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.25；293 K；0.2M imidazole (pH 7.0), 27% Jeffamine ED-2001 (pH 7.0), VAPOR DIFFUSION, HANGING DROP, temperature 293K
Resolution 3.00 Å R-free 0.275
3ZTJ Structure of influenza A neutralizing antibody selected from cultures of single human plasma cells in complex with human H3 Influenza haemagglutinin. Deposited 2011-07-08 Assembly 1 Other combination Heteromer；Protein × 12 PDB declaration: dodecameric（12） Consistent with protein count
Chain A 17–345（329 aa）
Chain B 346–520（175 aa） Fragment：RESIDUES 346-520
Chain C 17–345（329 aa）
Chain D 346–520（175 aa） Fragment：RESIDUES 346-520
Chain E 17–345（329 aa）
Chain F 346–520（175 aa） Fragment：RESIDUES 346-520
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 3.41 Å R-free 0.284
4HMG REFINEMENT OF THE INFLUENZA VIRUS HEMAGGLUTININ BY SIMULATED ANNEALING Deposited 1989-09-11 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 17–344（328 aa）
Chain B 346–520（175 aa）
Chain C 17–344（328 aa）
Chain D 346–520（175 aa）
Chain E 17–344（328 aa）
Chain F 346–520（175 aa）
Not recorded SIA N-acetyl-alpha-neuraminic acid × 3 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 12 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 3.00 Å
5HMG REFINEMENT OF THE INFLUENZA VIRUS HEMAGGLUTININ BY SIMULATED ANNEALING Deposited 1989-09-11 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 17–344（328 aa）
Chain B 346–520（175 aa）
Chain C 17–344（328 aa）
Chain D 346–520（175 aa）
Chain E 17–344（328 aa）
Chain F 346–520（175 aa）
Not recorded SIA N-acetyl-alpha-neuraminic acid × 3 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 12 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 3.20 Å
5Y2L Crystal structure of a group 2 HA binding antibody AF4H1K1 Fab in complex with the 1968 H3N2 pandemic (H3-AC/68) hemagglutinin Deposited 2017-07-26 Assembly 1 Other combination Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 17–345（329 aa）
Chain B 346–521（176 aa） Fragment：UNP residues 346-521
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；291 K；0.19 mM CYMAL7, 0.1M HEPES pH 7.5, 40% ployethylene glycol 400
Resolution 2.90 Å R-free 0.244
6E56 Human antibody H2214 in complex with influenza hemagglutinin A/Aichi/2/1968 (X-31) (H3N2) Deposited 2018-07-19 Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain D 53–335（283 aa） Fragment：head domain (UNP residues 53-335)
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 ACT ACETATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5；291.15 K；100 mM sodium chloride, 100 mM sodium acetate, pH 5.0, 20% w/v PEG2000 MME
Resolution 2.00 Å R-free 0.214
6E56 Human antibody H2214 in complex with influenza hemagglutinin A/Aichi/2/1968 (X-31) (H3N2) Deposited 2018-07-19 Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 53–335（283 aa） Fragment：head domain (UNP residues 53-335)
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 ACT ACETATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5；291.15 K；100 mM sodium chloride, 100 mM sodium acetate, pH 5.0, 20% w/v PEG2000 MME
Resolution 2.00 Å R-free 0.214
6N5D Broadly protective antibodies directed to a subdominant influenza hemagglutinin epitope Deposited 2018-11-21 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 53–334（282 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；291 K；0.2 M sodium bromide, 0.1 M Bis-Tris propane, pH 6.5, 20% w/v PEG3350
Resolution 3.00 Å R-free 0.244
6N5D Broadly protective antibodies directed to a subdominant influenza hemagglutinin epitope Deposited 2018-11-21 Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain B 53–334（282 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；291 K；0.2 M sodium bromide, 0.1 M Bis-Tris propane, pH 6.5, 20% w/v PEG3350
Resolution 3.00 Å R-free 0.244
6N5D Broadly protective antibodies directed to a subdominant influenza hemagglutinin epitope Deposited 2018-11-21 Assembly 3 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain K 53–334（282 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；291 K；0.2 M sodium bromide, 0.1 M Bis-Tris propane, pH 6.5, 20% w/v PEG3350
Resolution 3.00 Å R-free 0.244
6N5E Broadly protective antibodies directed to a subdominant influenza hemagglutinin epitope Deposited 2018-11-21 Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 53–334（282 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；291 K；0.2 M ammonium sulfate, 0.1 M MES, pH 6.5, 20% w/v PEG8000
Resolution 3.00 Å R-free 0.287
6N5E Broadly protective antibodies directed to a subdominant influenza hemagglutinin epitope Deposited 2018-11-21 Assembly 2 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain B 53–334（282 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；291 K；0.2 M ammonium sulfate, 0.1 M MES, pH 6.5, 20% w/v PEG8000
Resolution 3.00 Å R-free 0.287
6N5E Broadly protective antibodies directed to a subdominant influenza hemagglutinin epitope Deposited 2018-11-21 Assembly 3 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain C 53–334（282 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；291 K；0.2 M ammonium sulfate, 0.1 M MES, pH 6.5, 20% w/v PEG8000
Resolution 3.00 Å R-free 0.287
6XPX Human antibody S1V2-51 in complex with the influenza hemagglutinin head domain of A/Aichi/2/1968 (X-31)(H3N2) Deposited 2020-07-09 Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 53–335（283 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 BCN BICINE × 2 GOL GLYCEROL × 7 1PE PENTAETHYLENE GLYCOL × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 9；291.15 K；0.3 M Magnesium chloride, 25% (w/v) PEG 2000, 15% (w/v) Glycerol, 0.1 M BICINE, pH 9.0
Resolution 2.60 Å R-free 0.215
6Y5G Ectodomain of X-31 Haemagglutinin at pH 8 Deposited 2020-02-25 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 24–341（318 aa）
Chain B 346–517（172 aa）
Chain C 24–341（318 aa）
Chain D 346–517（172 aa）
Chain E 24–341（318 aa）
Chain F 346–517（172 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 9 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
6Y5H Ectodomain of X-31 Haemagglutinin at pH 5 (State I) Deposited 2020-02-25 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 24–341（318 aa）
Chain B 346–517（172 aa）
Chain C 24–341（318 aa）
Chain D 346–517（172 aa）
Chain E 24–341（318 aa）
Chain F 346–517（172 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 ELECTRON MICROSCOPY
cryo-EM buffer pH 5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.00 Å
6Y5I Dilated form 1 of X-31 Influenza Haemagglutinin at pH 5 (State II) Deposited 2020-02-25 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 24–341（318 aa）
Chain B 346–517（172 aa）
Chain C 24–341（318 aa）
Chain D 346–517（172 aa）
Chain E 24–341（318 aa）
Chain F 346–517（172 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 ELECTRON MICROSCOPY
cryo-EM buffer pH 5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 5.50 Å
6Y5J Dilated form 2 of X-31 Influenza Haemagglutinin at pH 5 (State III) Deposited 2020-02-25 Assembly 1 Other combination Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 24–341（318 aa）
Chain B 346–517（172 aa）
Chain C 24–341（318 aa）
Chain D 346–517（172 aa）
Chain E 24–341（318 aa）
Chain F 346–517（172 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 ELECTRON MICROSCOPY
cryo-EM buffer pH 5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 5.60 Å
6Y5K Extended Intermediate form of X-31 Influenza Haemagglutinin at pH 5 (State IV) Deposited 2020-02-25 Assembly 1 Protein homooligomer Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 24–341（318 aa）
Chain B 346–517（172 aa）
Chain C 24–341（318 aa）
Chain D 346–517（172 aa）
Chain E 24–341（318 aa）
Chain F 346–517（172 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 ELECTRON MICROSCOPY
cryo-EM buffer pH 5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.20 Å
6Y5L Signal Subtracted Extended Intermediate form of X-31 Influenza Haemagglutinin at pH 5 (State IV) Deposited 2020-02-25 Assembly 1 Insufficient information Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain B 346–517（172 aa）
Chain D 346–517（172 aa）
Chain F 346–517（172 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.60 Å
7ZJ6 X-31 Hemagglutinin Precursor HA0 at pH 7.5 Deposited 2022-04-08 Assembly 1 Insufficient information Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 17–520（504 aa）
Chain B 17–520（504 aa）
Chain C 17–520（504 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE；4s blot
Resolution 2.60 Å
7ZJ7 X-31 Hemagglutinin Precursor HA0 at pH 4.8 Deposited 2022-04-08 Assembly 1 Insufficient information Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 17–520（504 aa）
Chain B 17–520（504 aa）
Chain C 17–520（504 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 4.8
cryo-EM vitrification conditions Cryogen ETHANE；4s blot
Resolution 3.95 Å
7ZJ8 X-31 Hemagglutinin Precursor HA0 at pH 7.5 after reneutralization Deposited 2022-04-08 Assembly 1 Insufficient information Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 17–520（504 aa）
Chain B 17–520（504 aa）
Chain C 17–520（504 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 BOG octyl beta-D-glucopyranoside × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7
cryo-EM vitrification conditions Cryogen ETHANE；4s blot
Resolution 3.10 Å
8G5B Influenza A H3N2 X-31 Hemagglutinin in complex with FL-1061 Deposited 2023-02-12 Assembly 1 Protein heterocomplex Heteromer；Protein × 7 PDB declaration: heptameric（7） Consistent with protein count
Chain A 53–335（283 aa） Fragment：head fragment
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 Å
8PK3 CryoEM reconstruction of hemagglutinin HK68 of Influenza A virus bound to an Affimer reagent Deposited 2023-06-24 Assembly 1 Other combination Heteromer；Protein × 9 PDB declaration: nonameric（9） Consistent with protein count
Chain D 346–520（175 aa）
Chain E 346–520（175 aa）
Chain F 346–520（175 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.40 Å

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.