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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：Q9QUK6 New Search
10PDB entries
15Biological assembly
21chain/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
2Z64 Crystal structure of mouse TLR4 and mouse MD-2 complex Deposited 2007-07-22 Assembly 1 Other combination Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 27–625（599 aa） Fragment：TLR4, UNP residues 27-625
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 9 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 6.5；296 K；0.1M Na-Cacodylate, 23% PEG 8000, pH 6.5, VAPOR DIFFUSION, temperature 296K
Resolution 2.84 Å R-free 0.290
3VQ1 Crystal structure of mouse TLR4/MD-2/lipid IVa complex Deposited 2012-03-17 Assembly 1 Other combination Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 22–627（606 aa） Fragment：UNP residues 22-627
Chain B 22–627（606 aa） Fragment：UNP residues 22-627
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 LP4 2-deoxy-3-O-[(3R)-3-hydroxytetradecanoyl]-2-{[(3R)-3-hydroxytetradecanoyl]amino}-4-O-phosphono-beta-D-glucopyranose × 2 LP5 (R)-((2R,3S,4R,5R,6R)-3-HYDROXY-2-(HYDROXYMETHYL)-5-((R)-3-HYDROXYTETRADECANAMIDO)-6-(PHOSPHONOOXY)TETRAHYDRO-2H-PYRAN-4-YL) 3-HYDROXYTETRADECANOATE × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8.5；293 K；15% PEG4000, 0.2M Na acetate, 0.1M Tris-HCl, pH 8.5, VAPOR DIFFUSION, SITTING DROP, temperature 293K
Resolution 2.70 Å R-free 0.277
3VQ2 Crystal structure of mouse TLR4/MD-2/LPS complex Deposited 2012-03-17 Assembly 1 Other combination Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 22–627（606 aa） Fragment：UNP residues 22-627
Chain B 22–627（606 aa） Fragment：UNP residues 22-627
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 LP4 2-deoxy-3-O-[(3R)-3-hydroxytetradecanoyl]-2-{[(3R)-3-hydroxytetradecanoyl]amino}-4-O-phosphono-beta-D-glucopyranose × 2 LP5 (R)-((2R,3S,4R,5R,6R)-3-HYDROXY-2-(HYDROXYMETHYL)-5-((R)-3-HYDROXYTETRADECANAMIDO)-6-(PHOSPHONOOXY)TETRAHYDRO-2H-PYRAN-4-YL) 3-HYDROXYTETRADECANOATE × 2 DAO LAURIC ACID × 2 MYR MYRISTIC ACID × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；293 K；18% PEG3350, 0.2M sodium tartrate, 0.1M Bis-Tris propane, pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 293K
Resolution 2.48 Å R-free 0.267
5IJB The ligand-free structure of the mouse TLR4/MD-2 complex Deposited 2016-03-01 Assembly 1 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 26–544（519 aa） Fragment：TLR4 ectodomain (UNP residues 26-544) + VLRB (UNP residues 126-200)
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 4 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；293 K；0.1 M Bicine, pH 7.5, 12% PEG10000
Resolution 2.91 Å R-free 0.308
5IJB The ligand-free structure of the mouse TLR4/MD-2 complex Deposited 2016-03-01 Assembly 2 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 26–544（519 aa） Fragment：TLR4 ectodomain (UNP residues 26-544) + VLRB (UNP residues 126-200)
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；293 K；0.1 M Bicine, pH 7.5, 12% PEG10000
Resolution 2.91 Å R-free 0.308
5IJC The crystal structure of mouse TLR4/MD-2/neoseptin-3 complex Deposited 2016-03-01 Assembly 1 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 26–544（519 aa） Fragment：TLR4 ectodomain (UNP residues 26-544) + VLRB (UNP residues 126-200)
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 V2A neoseptin 3 × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；293 K；0.1 M Tris, pH 8.0, 0.2 M lithium chloride, 12% PEG8000
Resolution 2.57 Å R-free 0.234
5IJC The crystal structure of mouse TLR4/MD-2/neoseptin-3 complex Deposited 2016-03-01 Assembly 2 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 26–544（519 aa） Fragment：TLR4 ectodomain (UNP residues 26-544) + VLRB (UNP residues 126-200)
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 5 V2A neoseptin 3 × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；293 K；0.1 M Tris, pH 8.0, 0.2 M lithium chloride, 12% PEG8000
Resolution 2.57 Å R-free 0.234
5IJD The crystal structure of mouse TLR4/MD-2/lipid A complex Deposited 2016-03-01 Assembly 1 Insufficient information Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 26–544（519 aa） Fragment：TLR4 ectodomain (UNP residues 26-544) + VLRB (UNP residues 126-200)
Chain B 26–544（519 aa） Fragment：TLR4 ectodomain (UNP residues 26-544) + VLRB (UNP residues 126-200)
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 5 LP4 2-deoxy-3-O-[(3R)-3-hydroxytetradecanoyl]-2-{[(3R)-3-hydroxytetradecanoyl]amino}-4-O-phosphono-beta-D-glucopyranose × 2 LP5 (R)-((2R,3S,4R,5R,6R)-3-HYDROXY-2-(HYDROXYMETHYL)-5-((R)-3-HYDROXYTETRADECANAMIDO)-6-(PHOSPHONOOXY)TETRAHYDRO-2H-PYRAN-4-YL) 3-HYDROXYTETRADECANOATE × 2 DAO LAURIC ACID × 2 MYR MYRISTIC ACID × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；293 K；0.1 M Tris, pH 8.0, 0.2 M lithium chloride, 14% PEG8000, 2.5% PEG400
Resolution 2.70 Å R-free 0.285
5IJD The crystal structure of mouse TLR4/MD-2/lipid A complex Deposited 2016-03-01 Assembly 2 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 26–544（519 aa） Fragment：TLR4 ectodomain (UNP residues 26-544) + VLRB (UNP residues 126-200)
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 LP4 2-deoxy-3-O-[(3R)-3-hydroxytetradecanoyl]-2-{[(3R)-3-hydroxytetradecanoyl]amino}-4-O-phosphono-beta-D-glucopyranose × 1 LP5 (R)-((2R,3S,4R,5R,6R)-3-HYDROXY-2-(HYDROXYMETHYL)-5-((R)-3-HYDROXYTETRADECANAMIDO)-6-(PHOSPHONOOXY)TETRAHYDRO-2H-PYRAN-4-YL) 3-HYDROXYTETRADECANOATE × 1 DAO LAURIC ACID × 1 MYR MYRISTIC ACID × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；293 K；0.1 M Tris, pH 8.0, 0.2 M lithium chloride, 14% PEG8000, 2.5% PEG400
Resolution 2.70 Å R-free 0.285
5IJD The crystal structure of mouse TLR4/MD-2/lipid A complex Deposited 2016-03-01 Assembly 3 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 26–544（519 aa） Fragment：TLR4 ectodomain (UNP residues 26-544) + VLRB (UNP residues 126-200)
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 LP4 2-deoxy-3-O-[(3R)-3-hydroxytetradecanoyl]-2-{[(3R)-3-hydroxytetradecanoyl]amino}-4-O-phosphono-beta-D-glucopyranose × 1 LP5 (R)-((2R,3S,4R,5R,6R)-3-HYDROXY-2-(HYDROXYMETHYL)-5-((R)-3-HYDROXYTETRADECANAMIDO)-6-(PHOSPHONOOXY)TETRAHYDRO-2H-PYRAN-4-YL) 3-HYDROXYTETRADECANOATE × 1 DAO LAURIC ACID × 1 MYR MYRISTIC ACID × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；293 K；0.1 M Tris, pH 8.0, 0.2 M lithium chloride, 14% PEG8000, 2.5% PEG400
Resolution 2.70 Å R-free 0.285
7MLM Crystal structure of mouse TLR4/MD-2 in complex with sulfatides Deposited 2021-04-28 Assembly 1 Insufficient information Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 26–544（519 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 8 ZKM N-[(1S,2R,3E)-2-hydroxy-1-{[(3-O-sulfo-beta-D-galactopyranosyl)oxy]methyl}heptadec-3-en-1-yl]-hexadecanamide × 6 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293.15 K；0.1 M Tris pH8.0, 0.8 M sodium formate, 8% PEG 8000, 8% PEG 1000
Resolution 2.10 Å R-free 0.244
7MLM Crystal structure of mouse TLR4/MD-2 in complex with sulfatides Deposited 2021-04-28 Assembly 2 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 26–544（519 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 4 ZKM N-[(1S,2R,3E)-2-hydroxy-1-{[(3-O-sulfo-beta-D-galactopyranosyl)oxy]methyl}heptadec-3-en-1-yl]-hexadecanamide × 3 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293.15 K；0.1 M Tris pH8.0, 0.8 M sodium formate, 8% PEG 8000, 8% PEG 1000
Resolution 2.10 Å R-free 0.244
8WQT Cryo-EM Structure of Mouse TLR4/MD-2/DLAM1 complex Deposited 2023-10-12 Assembly 1 Other combination Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 26–629（604 aa）
Chain B 26–629（604 aa）
Not recorded 2IL (3R)-3-(dodecanoyloxy)tetradecanoic acid × 4 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 16 GP4 2-amino-2-deoxy-4-O-phosphono-alpha-D-glucopyranose × 2 0IL (3R)-3-(tetradecanoyloxy)tetradecanoic acid × 2 X6Z [(2~{R},3~{S},4~{S},5~{S})-5-methoxy-3,4,6-tris(oxidanyl)oxan-2-yl]methyl dihydrogen phosphate × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.60 Å
8WRY Cryo-EM Structure of Mouse TLR4/MD-2/DLAM3 Complex Deposited 2023-10-16 Assembly 1 Other combination Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 26–629（604 aa）
Chain B 26–629（604 aa）
Not recorded 2IL (3R)-3-(dodecanoyloxy)tetradecanoic acid × 4 0IL (3R)-3-(tetradecanoyloxy)tetradecanoic acid × 2 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 16 GP4 2-amino-2-deoxy-4-O-phosphono-alpha-D-glucopyranose × 2 XIQ 2-(hydroxymethyl)-5-methoxy-3,6-bis(oxidanyl)pyran-4-one × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.60 Å
8WSA Cryo-EM Structure of Mouse TLR4/MD-2/DLAM5 Complex Deposited 2023-10-17 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 26–629（604 aa）
Chain B 26–629（604 aa）
Not recorded GP4 2-amino-2-deoxy-4-O-phosphono-alpha-D-glucopyranose × 2 A1L01 (3~{S})-3-decanoyloxytetradecanoic acid × 2 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 14 2IL (3R)-3-(dodecanoyloxy)tetradecanoic acid × 2 0IL (3R)-3-(tetradecanoyloxy)tetradecanoic acid × 2 X6N [(2~{R},3~{S},4~{R},5~{S})-2-(hydroxymethyl)-5-methoxy-4,6-bis(oxidanyl)oxan-3-yl] dihydrogen phosphate × 2 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 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.