4qxf

crystal structure of human LGR4 and Rspo1

Method: X-RAY DIFFRACTION D_max: 117.0 Å Quality: GOOD

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1. Protein Identity and Related Structures Protein Identity & Related Structures

Leucine-rich repeat-containing G-protein coupled receptor 4, Variable lymphocyte receptor B

Eptatretus burgeri

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Insufficient information Heteromer Protein × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain A； UniProt 128–200	Fragment：UNP residues 27-252, UNP residues 128-200 Mutation：D75G	R-spondin-1 × 1 （Q2MKA7）	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 6.5；289 K；0.1M MES pH 6.5, 0.2M sodium thiocyanate, 22% PEG3350, VAPOR DIFFUSION, HANGING DROP, temperature 289K	Resolution 2.25 Å R-free 0.243
2	Insufficient information Heteromer Protein × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain B； UniProt 128–200	Fragment：UNP residues 27-252, UNP residues 128-200 Mutation：D75G	R-spondin-1 × 1 （Q2MKA7）	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 6.5；289 K；0.1M MES pH 6.5, 0.2M sodium thiocyanate, 22% PEG3350, VAPOR DIFFUSION, HANGING DROP, temperature 289K	Resolution 2.25 Å R-free 0.243

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB	Difference from Current Entry 4QXF	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
2O6R Structural diversity of the hagfish Variable Lymphocyte Receptors B61 Deposited 2006-12-08	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 24–200（177 aa） Fragment：Leucine-rich repeat (LRR), residues 24-200	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；295 K；30% PEG 4000, 0.1M Tris-Hcl, 0.2M sodium chloride, pH 8.5, VAPOR DIFFUSION, HANGING DROP, temperature 295.0K	Resolution 2.30 Å R-free 0.259
2Z62 Crystal structure of the TV3 hybrid of human TLR4 and hagfish VLRB.61 Deposited 2007-07-22	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 128–199（72 aa） Fragment：TLR4, UNP residues 27-228(human), VLRB.61, UNP residues 128-199(Inshore hagfish)	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 5.5；296 K；0.2M NaCl, 0.1M Bis-Tris Propane, 33% PEG 1000, pH 5.50, VAPOR DIFFUSION, temperature 296K	Resolution 1.70 Å R-free 0.208
2Z63 Crystal structure of the TV8 hybrid of human TLR4 and hagfish VLRB.61 Deposited 2007-07-22	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 133–199（67 aa） Fragment：TLR4, UNP residues 27-527(human), VLRB.61, UNP residues 133-199(Inshore hagfish)	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 6.5；277 K；0.2M Sodium Citrate, 0.1M Bis-Tris Propane, 27% PEG 1000, pH 6.50, VAPOR DIFFUSION, temperature 277K	Resolution 2.00 Å R-free 0.298
2Z65 Crystal structure of the human TLR4 TV3 hybrid-MD-2-Eritoran complex Deposited 2007-07-22	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 128–199（72 aa） Fragment：TV3, UNP residues 27-228(human), E5564, UNP residues 19-158(Inshore hagfish)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 4.5；296 K；0.2M Ammonium Sulfate, 0.1M Sodium Acetate, 20% PEG 4000, 5% Ethanol, pH 4.5, VAPOR DIFFUSION, temperature 296K	Resolution 2.70 Å R-free 0.289
2Z65 Crystal structure of the human TLR4 TV3 hybrid-MD-2-Eritoran complex Deposited 2007-07-22	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain B 128–199（72 aa） Fragment：TV3, UNP residues 27-228(human), E5564, UNP residues 19-158(Inshore hagfish)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 4.5；296 K；0.2M Ammonium Sulfate, 0.1M Sodium Acetate, 20% PEG 4000, 5% Ethanol, pH 4.5, VAPOR DIFFUSION, temperature 296K	Resolution 2.70 Å R-free 0.289
2Z66 Crystal structure of the VT3 hybrid of human TLR4 and hagfish VLRB.61 Deposited 2007-07-22	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 24–82（59 aa） Fragment：VLRB.61, UNP residues 24-82(Inshore hagfish), TLR4, UNP residues 383-228(human)	Not recorded	SO4 SULFATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 5.5；277 K；0.2M Lithium Sulfate, 0.1M Sodium Acetate, 24% PEG 4000, pH 5.50, temperature 277K, VAPOR DIFFUSION	Resolution 1.90 Å R-free 0.219
2Z66 Crystal structure of the VT3 hybrid of human TLR4 and hagfish VLRB.61 Deposited 2007-07-22	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain B 24–82（59 aa） Fragment：VLRB.61, UNP residues 24-82(Inshore hagfish), TLR4, UNP residues 383-228(human)	Not recorded	SO4 SULFATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 5.5；277 K；0.2M Lithium Sulfate, 0.1M Sodium Acetate, 24% PEG 4000, pH 5.50, temperature 277K, VAPOR DIFFUSION	Resolution 1.90 Å R-free 0.219
2Z66 Crystal structure of the VT3 hybrid of human TLR4 and hagfish VLRB.61 Deposited 2007-07-22	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 3 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain C 24–82（59 aa） Fragment：VLRB.61, UNP residues 24-82(Inshore hagfish), TLR4, UNP residues 383-228(human)	Not recorded	SO4 SULFATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 5.5；277 K；0.2M Lithium Sulfate, 0.1M Sodium Acetate, 24% PEG 4000, pH 5.50, temperature 277K, VAPOR DIFFUSION	Resolution 1.90 Å R-free 0.219
2Z66 Crystal structure of the VT3 hybrid of human TLR4 and hagfish VLRB.61 Deposited 2007-07-22	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 4 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain D 24–82（59 aa） Fragment：VLRB.61, UNP residues 24-82(Inshore hagfish), TLR4, UNP residues 383-228(human)	Not recorded	SO4 SULFATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 5.5；277 K；0.2M Lithium Sulfate, 0.1M Sodium Acetate, 24% PEG 4000, pH 5.50, temperature 277K, VAPOR DIFFUSION	Resolution 1.90 Å R-free 0.219
2Z7X Crystal structure of the TLR1-TLR2 heterodimer induced by binding of a tri-acylated lipopeptide Deposited 2007-08-29	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 133–199（67 aa） Chain B 133–199（67 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 4 PLM PALMITIC ACID × 1 Z41 (2S)-3-hydroxypropane-1,2-diyl dihexadecanoate × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；296 K；0.2M sodium citrate, 20% PEG3350, VAPOR DIFFUSION, HANGING DROP, temperature 296K	Resolution 2.10 Å R-free 0.270
2Z80 Crystal structure of the TLR1-TLR2 heterodimer induced by binding of a tri-acylated lipopeptide Deposited 2007-08-30	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 136–199（64 aa） Fragment：TLR2, UNP residues 1-284(human), VLRB.61, UNP residues 136-199(Inshore hagfish)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；296 K；0.1M Tris-HCl pH8.5, 28% PEG2000, VAPOR DIFFUSION, HANGING DROP, temperature 296K	Resolution 1.80 Å R-free 0.254
2Z80 Crystal structure of the TLR1-TLR2 heterodimer induced by binding of a tri-acylated lipopeptide Deposited 2007-08-30	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain B 136–199（64 aa） Fragment：TLR2, UNP residues 1-284(human), VLRB.61, UNP residues 136-199(Inshore hagfish)	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；296 K；0.1M Tris-HCl pH8.5, 28% PEG2000, VAPOR DIFFUSION, HANGING DROP, temperature 296K	Resolution 1.80 Å R-free 0.254
2Z81 Crystal structure of the TLR1-TLR2 heterodimer induced by binding of a tri-acylated lipopeptide Deposited 2007-08-30	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 133–199（67 aa） Fragment：TLR2, UNP residues 27-506(Mouse), VLRB.61, UNP residues 136-199(Inshore hagfish)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 PCJ (2R)-3-{[(2S)-3-HYDROXY-2-(PALMITOYLAMINO)PROPYL]THIO}PROPANE-1,2-DIYL DIHEXADECANOATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；296 K；0.2M ammonium sulfate, 0.1M Tris-HCl pH8.5, 34% PEG1000, VAPOR DIFFUSION, HANGING DROP, temperature 296K	Resolution 1.80 Å R-free 0.232
2Z82 Crystal structure of the TLR1-TLR2 heterodimer induced by binding of a tri-acylated lipopeptide Deposited 2007-08-30	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 133–199（67 aa） Fragment：TLR2, UNP residues 27-506(Mouse), VLRB.61, UNP residues 133-199(Inshore hagfish)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 PDJ (2R)-3-{[(2R)-2-AMINO-3-HYDROXYPROPYL]THIO}PROPANE-1,2-DIYL DIHEXADECANOATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；296 K；0.2M ammonium sulfate, 0.1M Tris-HCl pH8.5 and 34% PEG1000, VAPOR DIFFUSION, HANGING DROP, temperature 296K	Resolution 2.60 Å R-free 0.277
3A79 Crystal structure of TLR2-TLR6-Pam2CSK4 complex Deposited 2009-09-20	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 133–200（68 aa） Fragment：extracellular domain, UNP residues 1-506(mouse), UNP residues 133-200(Inshore hagfish)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 5 PXS (2S)-propane-1,2-diyl dihexadecanoate × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；293 K；2.0M ammonium sulfate, 0.1M MES pH 5.5, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.90 Å R-free 0.280
3A7B Crystal structure of TLR2-Streptococcus Pneumoniae lipoteichoic acid complex Deposited 2009-09-20	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 133–200（68 aa） Fragment：extracellular domain, UNP residues 1-506(mouse), UNP residues 133-200(Inshore hagfish)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 LTC (2S)-1-({3-O-[2-(acetylamino)-4-amino-2,4,6-trideoxy-beta-D-galactopyranosyl]-alpha-D-glucopyranosyl}oxy)-3-(heptanoyloxy)propan-2-yl (7Z)-pentadec-7-enoate × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；293 K；50mM ammonium citrate pH 7.0, 20% PEG 4000, 30% ethylene glycol, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.53 Å R-free 0.270
3A7C Crystal structure of TLR2-PE-DTPA complex Deposited 2009-09-20	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 133–200（68 aa） Fragment：extracellular domain, UNP residues 1-506(mouse), UNP residues 133-200(Inshore hagfish)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 PDK (10S,13R)-3-{2-[{2-[bis(carboxymethyl)amino]ethyl}(carboxymethyl)amino]ethyl}-10-hydroxy-5,16-dioxo-13-(tetradecanoyloxy)-9,11,15-trioxa-3,6-diaza-10-phosphanonacosan-1-oic acid 10-oxide × 1 LU LUTETIUM (III) ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；293 K；0.2M ammonium sulfate, 0.1M Na-HEPES pH 7.5, 25% PEG 4000, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.40 Å R-free 0.290
3UL7 Crystal structure of the TV3 mutant F63W Deposited 2011-11-10	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 126–199（74 aa） Fragment：UNP RESIDUES 28-228, UNP RESIDUES 126-199	Mutation：F63W	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 FUL beta-L-fucopyranose × 1 SO4 SULFATE ION × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 5.5；296 K；0.1M Bis-Tris (pH5.5), 36% PEG 1000, 0.2M Lithium sulfate, VAPOR DIFFUSION, temperature 296K	Resolution 2.37 Å R-free 0.271
3UL8 Crystal structure of the TV3 mutant V134L Deposited 2011-11-10	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 126–199（74 aa） Fragment：UNP RESIDUES 27-228, UNP RESIDUES 126-199	Mutation：V134L	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 FUL beta-L-fucopyranose × 1 SO4 SULFATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 5.5；296 K；0.1M Bis-Tris(pH5.5), 36% PEG 1000, 0.2M Lithium sulfate, VAPOR DIFFUSION, temperature 296K	Resolution 2.50 Å R-free 0.300
3UL9 structure of the TV3 mutant M41E Deposited 2011-11-10	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 126–199（74 aa） Fragment：UNP RESIDUES 28-228, UNP RESIDUES 126-199	Mutation：M41E	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 FUL beta-L-fucopyranose × 1 SO4 SULFATE ION × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 5.5；296 K；0.1M Bis-Tris(pH5.5), 36% PEG 1000, 0.2M Lithium sulfate, VAPOR DIFFUSION, temperature 296K	Resolution 2.45 Å R-free 0.306
3ULA Crystal structure of the TV3 mutant F63W-MD-2-Eritoran complex Deposited 2011-11-10	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 126–199（74 aa） Fragment：UNP RESIDUES 27-228, UNP RESIDUES 126-199	Mutation：F63W	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 E55 3-O-DECYL-2-DEOXY-6-O-{2-DEOXY-3-O-[(3R)-3-METHOXYDECYL]-6-O-METHYL-2-[(11Z)-OCTADEC-11-ENOYLAMINO]-4-O-PHOSPHONO-BETA-D-GLUCOPYRANOSYL}-2-[(3-OXOTETRADECANOYL)AMINO]-1-O-PHOSPHONO-ALPHA-D-GLUCOPYRANOSE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 4.5；296 K；0.1M sodium acetate (pH4.5), 22% w/v PEG 8000, 0.2M lithium sulfate, VAPOR DIFFUSION, temperature 296K	Resolution 3.60 Å R-free 0.341
3ULA Crystal structure of the TV3 mutant F63W-MD-2-Eritoran complex Deposited 2011-11-10	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric	Chain C 126–199（74 aa） Fragment：UNP RESIDUES 27-228, UNP RESIDUES 126-199	Mutation：F63W	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 E55 3-O-DECYL-2-DEOXY-6-O-{2-DEOXY-3-O-[(3R)-3-METHOXYDECYL]-6-O-METHYL-2-[(11Z)-OCTADEC-11-ENOYLAMINO]-4-O-PHOSPHONO-BETA-D-GLUCOPYRANOSYL}-2-[(3-OXOTETRADECANOYL)AMINO]-1-O-PHOSPHONO-ALPHA-D-GLUCOPYRANOSE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 4.5；296 K；0.1M sodium acetate (pH4.5), 22% w/v PEG 8000, 0.2M lithium sulfate, VAPOR DIFFUSION, temperature 296K	Resolution 3.60 Å R-free 0.341
3V44 Crystal structure of the N-terminal fragment of zebrafish TLR5 Deposited 2011-12-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 126–200（75 aa） Fragment：zebrafish Toll-like receptor 5b (UNP residues 22-342) and hagfish variable lymphocyte receptor B.61 (UNP residues 126-200)	Mutation：V24E, L124V, Q159K, R227K, S229T, D334N	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；277 K；20% MPD, 0.1 M Hepes pH 7.0, VAPOR DIFFUSION, SITTING DROP, temperature 277K	Resolution 2.83 Å R-free 0.238
3V47 Crystal structure of the N-terminal fragment of zebrafish TLR5 in complex with Salmonella flagellin Deposited 2011-12-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 126–200（75 aa） Fragment：zebrafish Toll-like receptor 5b (UNP residues 22-390), hagfish variable lymphocyte receptor B.61 (UNP residues 126-200) Chain B 126–200（75 aa） Fragment：zebrafish Toll-like receptor 5b (UNP residues 22-390), hagfish variable lymphocyte receptor B.61 (UNP residues 126-200)	Mutation：V24E, L124V, Q159K, R227K, S229T, D334N Mutation：V24E, L124V, Q159K, R227K, S229T, D334N	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8.5；296 K；15% PEG8000, 0.2 M magnesium chloride, 0.1 M Tris pH 8.5, VAPOR DIFFUSION, SITTING DROP, temperature 296K	Resolution 2.47 Å R-free 0.259
4ARN Crystal structure of the N-terminal domain of Drosophila Toll receptor Deposited 2012-04-25	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 131–201（71 aa） Fragment：TOLL RECEPTOR RESIDUES 28-228, VARIABLE LYMPHOCYTE RECEPTOR B.61 RESIDUES 131-201	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 MLI MALONATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 7；PH 7	Resolution 2.41 Å R-free 0.216
4ARN Crystal structure of the N-terminal domain of Drosophila Toll receptor Deposited 2012-04-25	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain B 131–201（71 aa） Fragment：TOLL RECEPTOR RESIDUES 28-228, VARIABLE LYMPHOCYTE RECEPTOR B.61 RESIDUES 131-201	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 MLI MALONATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 7；PH 7	Resolution 2.41 Å R-free 0.216
4ARN Crystal structure of the N-terminal domain of Drosophila Toll receptor Deposited 2012-04-25	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 3 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain C 131–201（71 aa） Fragment：TOLL RECEPTOR RESIDUES 28-228, VARIABLE LYMPHOCYTE RECEPTOR B.61 RESIDUES 131-201	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 7；PH 7	Resolution 2.41 Å R-free 0.216
4ARN Crystal structure of the N-terminal domain of Drosophila Toll receptor Deposited 2012-04-25	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 4 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain D 131–201（71 aa） Fragment：TOLL RECEPTOR RESIDUES 28-228, VARIABLE LYMPHOCYTE RECEPTOR B.61 RESIDUES 131-201	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 7；PH 7	Resolution 2.41 Å R-free 0.216
4ARR Crystal structure of the N-terminal domain of Drosophila Toll receptor with the magic triangle I3C Deposited 2012-04-26	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 133–201（69 aa） Fragment：TOLL RECEPTOR (UNP RESIDUES 28-228), VARIABLE LYMPHOCYTE RECEPTOR B.61 (UNP RESIDUES 133-201)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 I3C 5-amino-2,4,6-triiodobenzene-1,3-dicarboxylic acid × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 7；SODIUM MALONATE AND 5-AMINO-2,4, 6-TRIIODOISOPHTHALIC ACID, pH 7	Resolution 3.00 Å R-free 0.254
4ARR Crystal structure of the N-terminal domain of Drosophila Toll receptor with the magic triangle I3C Deposited 2012-04-26	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain B 133–201（69 aa） Fragment：TOLL RECEPTOR (UNP RESIDUES 28-228), VARIABLE LYMPHOCYTE RECEPTOR B.61 (UNP RESIDUES 133-201)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 I3C 5-amino-2,4,6-triiodobenzene-1,3-dicarboxylic acid × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 7；SODIUM MALONATE AND 5-AMINO-2,4, 6-TRIIODOISOPHTHALIC ACID, pH 7	Resolution 3.00 Å R-free 0.254
4BV4 Structure and allostery in Toll-Spatzle recognition Deposited 2013-06-24	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 3 PDB declaration: trimeric	Chain R 133–201（69 aa） Fragment：PROTEIN TOLL, RESIDUES 28-397, VARIABLE LYMPHOCYTE RECEPTOR B, RESIDUES 133-201	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 4	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.5；15% PEG 8000, 0.1M TRIS PH 7.5, 0.1 M MGCL2	Resolution 2.35 Å R-free 0.227
4QDH Crystal Structure of the C-terminal Domain of Mouse TLR9 Deposited 2014-05-13	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 21–81（61 aa） Fragment：SEE REMARK 999 Chain A 126–200（75 aa） Fragment：SEE REMARK 999	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 5 SO4 SULFATE ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.77；295 K；100 mM sodium citrate, 1.5 M ammonium sulfate, pH 4.77, VAPOR DIFFUSION, SITTING DROP, temperature 295K	Resolution 2.40 Å R-free 0.247
4QDH Crystal Structure of the C-terminal Domain of Mouse TLR9 Deposited 2014-05-13	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain B 21–81（61 aa） Fragment：SEE REMARK 999 Chain B 126–200（75 aa） Fragment：SEE REMARK 999	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 5 SO4 SULFATE ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.77；295 K；100 mM sodium citrate, 1.5 M ammonium sulfate, pH 4.77, VAPOR DIFFUSION, SITTING DROP, temperature 295K	Resolution 2.40 Å R-free 0.247
4QXE Crystal structure of LGR4 fused with hagfish VLR Deposited 2014-07-20	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 133–200（68 aa） Fragment：R-spondin Receptor, UNP residues 27-396, UNP residues 133-200	Mutation：D75G	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 GOL GLYCEROL × 1 CL CHLORIDE ION × 2 SO4 SULFATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；289 K；0.1M HEPES pH 7.5, 2.0M ammonium sulfate, VAPOR DIFFUSION, HANGING DROP, temperature 289K	Resolution 2.20 Å R-free 0.237
5GY2 Crystal structure of a complex between Bacillus subtilis flagellin and zebrafish Toll-like receptor 5 Deposited 2016-09-21	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 126–200（75 aa）	Mutation：V24E/L124V/Q159K/R227K/S229T/D334N	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 PG4 TETRAETHYLENE GLYCOL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.4；291 K；PEG 300, sodium acetate, pH 4.4	Resolution 2.10 Å R-free 0.236
5GY2 Crystal structure of a complex between Bacillus subtilis flagellin and zebrafish Toll-like receptor 5 Deposited 2016-09-21	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 126–200（75 aa）	Mutation：V24E/L124V/Q159K/R227K/S229T/D334N	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 PG4 TETRAETHYLENE GLYCOL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.4；291 K；PEG 300, sodium acetate, pH 4.4	Resolution 2.10 Å R-free 0.236
5IJB The ligand-free structure of the mouse TLR4/MD-2 complex Deposited 2016-03-01	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 126–200（75 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	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 126–200（75 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	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 126–200（75 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	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 126–200（75 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	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 126–200（75 aa） Fragment：TLR4 ectodomain (UNP residues 26-544) + VLRB (UNP residues 126-200) Chain B 126–200（75 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	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 126–200（75 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	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 3 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 126–200（75 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
6BXA Crystal structure of N-terminal fragment of Zebrafish Toll-Like Receptor 5 (TLR5) with Lamprey Variable Lymphocyte Receptor 2 (VLR2) bound Deposited 2017-12-18	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 126–200（75 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 EDO 1,2-ETHANEDIOL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293.15 K；16% PEG 8K, 180 mM ammonium citrate, 90 mM MES pH 6.0, 10 mM urea	Resolution 2.30 Å R-free 0.218
6BXA Crystal structure of N-terminal fragment of Zebrafish Toll-Like Receptor 5 (TLR5) with Lamprey Variable Lymphocyte Receptor 2 (VLR2) bound Deposited 2017-12-18	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 126–200（75 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 EDO 1,2-ETHANEDIOL × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293.15 K；16% PEG 8K, 180 mM ammonium citrate, 90 mM MES pH 6.0, 10 mM urea	Resolution 2.30 Å R-free 0.218
6BXC Crystal structure of N-terminal fragment of Zebrafish Toll-Like Receptor 5 (TLR5) with Lamprey Variable Lymphocyte Receptor 9 (VLR9) bound Deposited 2017-12-18	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 126–200（75 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 EDO 1,2-ETHANEDIOL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293.15 K；15% Peg3350, 170 mM MgNO3, 80 mM MES pH 6.0, 15% ethylene glycol	Resolution 2.50 Å R-free 0.270
6BXC Crystal structure of N-terminal fragment of Zebrafish Toll-Like Receptor 5 (TLR5) with Lamprey Variable Lymphocyte Receptor 9 (VLR9) bound Deposited 2017-12-18	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 126–200（75 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293.15 K；15% Peg3350, 170 mM MgNO3, 80 mM MES pH 6.0, 15% ethylene glycol	Resolution 2.50 Å R-free 0.270
7MLM Crystal structure of mouse TLR4/MD-2 in complex with sulfatides Deposited 2021-04-28	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 126–200（75 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	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 126–200（75 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

30 other PDB entries and 49 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	Q4G1L2_EPTBU
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 229–301； UniProt 128–200 Author chain B； PDBConstruct 229–301； UniProt 128–200

Leucine-rich repeat-containing G-protein coupled receptor 4, Variable lymphocyte receptor B

Eptatretus burgeri

UniProt Q9BXB1

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Insufficient information Heteromer Protein × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain A； UniProt 27–252	Fragment：UNP residues 27-252, UNP residues 128-200 Mutation：D75G	R-spondin-1 × 1 （Q2MKA7）	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 6.5；289 K；0.1M MES pH 6.5, 0.2M sodium thiocyanate, 22% PEG3350, VAPOR DIFFUSION, HANGING DROP, temperature 289K	Resolution 2.25 Å R-free 0.243
2	Insufficient information Heteromer Protein × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain B； UniProt 27–252	Fragment：UNP residues 27-252, UNP residues 128-200 Mutation：D75G	R-spondin-1 × 1 （Q2MKA7）	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 6.5；289 K；0.1M MES pH 6.5, 0.2M sodium thiocyanate, 22% PEG3350, VAPOR DIFFUSION, HANGING DROP, temperature 289K	Resolution 2.25 Å R-free 0.243

Other States of the Same Protein in the Database

Other PDB	Difference from Current Entry 4QXF	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
4KT1 Complex of R-spondin 1 with LGR4 extracellular domain Deposited 2013-05-19	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 26–527（502 aa） Fragment：UNP residues 26-502	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6；291 K；PEG, pH 6.0, VAPOR DIFFUSION, SITTING DROP, temperature 291K	Resolution 2.50 Å R-free 0.209
4QXE Crystal structure of LGR4 fused with hagfish VLR Deposited 2014-07-20	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 27–396（370 aa） Fragment：R-spondin Receptor, UNP residues 27-396, UNP residues 133-200	Mutation：D75G	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 GOL GLYCEROL × 1 CL CHLORIDE ION × 2 SO4 SULFATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；289 K；0.1M HEPES pH 7.5, 2.0M ammonium sulfate, VAPOR DIFFUSION, HANGING DROP, temperature 289K	Resolution 2.20 Å R-free 0.237
8WVU Cryo-EM structure of LGR4 in complex with Rspo1 and RNF43 Deposited 2023-10-24	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 24–832（809 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen PROPANE	Resolution 3.61 Å
8WVV Cryo-EM structure of LGR4 in state I Deposited 2023-10-24	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 24–832（809 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen PROPANE	Resolution 3.35 Å
8WVW Cryo-EM structure of LGR4 in state II Deposited 2023-10-24	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 24–832（809 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen PROPANE	Resolution 3.53 Å
8WVX Cryo-EM structure of LGR4 in complex with Norrin(dimer) Deposited 2023-10-24	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 24–832（809 aa） Chain B 24–832（809 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen PROPANE	Resolution 3.32 Å
8WVY Cryo-EM structure of LGR4 in complex with Norrin Deposited 2023-10-24	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 24–832（809 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen PROPANE	Resolution 3.29 Å
8XFP the pentamerA complex of LGR4-RSPO2-ZNRF3(delta RING) Deposited 2023-12-14	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 1–951（951 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.21 Å
8XFS LGR4-RSPO2-ZNRF3 RING domain (1:2:2) Deposited 2023-12-14	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 31–821（791 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.20 Å
8XFT LGR4-RSPO2-ZNRF3(1:1:1) Deposited 2023-12-14	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 1–951（951 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.24 Å
8XT9 structure of LGR4 Deposited 2024-01-10	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain C 1–951（951 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.10 Å
8XUM Structure of LGR4 with RSPO2 Deposited 2024-01-13	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 1–951（951 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.90 Å
8Y69 LGR4-RSPO2-ZNRF3 (2:2:2) Deposited 2024-02-02	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric	Chain A 33–820（788 aa） Chain D 33–820（788 aa）	Not recorded	CLR CHOLESTEROL × 2	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.38 Å
9KB6 Cryo-EM structure of LGR4 Deposited 2024-10-30	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–822（822 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 4	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.53 Å
9KB7 Cryo-EM structure of LGR4-RSPO2 complex Deposited 2024-10-30	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 1–822（822 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.97 Å
9KB8 Cryo-EM structure of LGR4-RSPO2-ZNRF3 complex (1:1:2) Deposited 2024-10-30	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 1–822（822 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 4	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.25 Å
9KB9 Cryo-EM structure of LGR4-RSPO2-ZNRF3 complex (2:2:2) Deposited 2024-10-30	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 1–822（822 aa） Chain D 1–822（822 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 4	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.59 Å
9KGK Structure of the complex of LGR4 with NB18 Deposited 2024-11-08	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 1–950（950 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.63 Å
9KHH Structure of the complex of LGR4 with Norrin (2:2) Deposited 2024-11-10	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 6 PDB declaration: hexameric	Chain C 24–951（928 aa） Chain D 24–951（928 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.65 Å
9S37 Structure of LGR4 with NB21 Deposited 2025-07-23	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain D 32–823（792 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.94 Å
9S38 Structure of LGR4 with NB21 Deposited 2025-07-23	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain D 32–823（792 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.94 Å
9UOK Structure of the complex of LGR4_ECD with Norrin Deposited 2025-04-25	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 4 PDB declaration: tetrameric	Chain C 24–951（928 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.05 Å

22 other PDB entries and 22 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	LGR4_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 3–228； UniProt 27–252 Author chain B； PDBConstruct 3–228； UniProt 27–252

R-spondin-1

Homo sapiens

UniProt Q2MKA7

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Insufficient information Heteromer Protein × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain C； UniProt 34–135	Fragment：UNP residues 34-135	Leucine-rich repeat-containing G-protein coupled receptor 4, Variable lymphocyte receptor B × 1 （Q9BXB1,Q4G1L2）	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 6.5；289 K；0.1M MES pH 6.5, 0.2M sodium thiocyanate, 22% PEG3350, VAPOR DIFFUSION, HANGING DROP, temperature 289K	Resolution 2.25 Å R-free 0.243
2	Insufficient information Heteromer Protein × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain E； UniProt 34–135	Fragment：UNP residues 34-135	Leucine-rich repeat-containing G-protein coupled receptor 4, Variable lymphocyte receptor B × 1 （Q9BXB1,Q4G1L2）	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 6.5；289 K；0.1M MES pH 6.5, 0.2M sodium thiocyanate, 22% PEG3350, VAPOR DIFFUSION, HANGING DROP, temperature 289K	Resolution 2.25 Å R-free 0.243

Other States of the Same Protein in the Database

Other PDB	Difference from Current Entry 4QXF	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
4BSO Crystal structure of R-spondin 1 (Fu1Fu2) - Native Deposited 2013-06-11	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 31–146（116 aa） Fragment：FU1FU2, RESIDUES 31-146	Not recorded	EDO 1,2-ETHANEDIOL × 5 CL CHLORIDE ION × 2	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 2.20 Å R-free 0.250
4BSP Crystal structure of R-spondin 1 (Fu1Fu2) - Holmium soak Deposited 2013-06-11	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 31–146（116 aa） Fragment：FU1FU2, RESIDUES 31-146	Not recorded	HO HOLMIUM ATOM × 2 SO4 SULFATE ION × 1	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 2.00 Å R-free 0.260
4BSR Structure of the ectodomain of LGR5 in complex with R-spondin-1 (Fu1Fu2) in P22121 crystal form Deposited 2013-06-11	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 4 PDB declaration: tetrameric	Chain C 31–146（116 aa） Fragment：FU1FU2, RESIDUES 31-146 Chain D 31–146（116 aa） Fragment：FU1FU2, RESIDUES 31-146	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 3.20 Å R-free 0.258
4BSS Structure of the ectodomain of LGR5 in complex with R-spondin-1 (Fu1Fu2) in P21 crystal form Deposited 2013-06-11	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 4 PDB declaration: tetrameric	Chain C 31–146（116 aa） Fragment：FU1FU2, RESIDUES 31-146 Chain D 31–146（116 aa） Fragment：FU1FU2, RESIDUES 31-146	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 3.20 Å R-free 0.290
4BSS Structure of the ectodomain of LGR5 in complex with R-spondin-1 (Fu1Fu2) in P21 crystal form Deposited 2013-06-11	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Other combination Heteromer；Protein × 4 PDB declaration: tetrameric	Chain G 31–146（116 aa） Fragment：FU1FU2, RESIDUES 31-146 Chain H 31–146（116 aa） Fragment：FU1FU2, RESIDUES 31-146	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 3.20 Å R-free 0.290
4BST Structure of the ectodomain of LGR5 in complex with R-spondin-1 (Fu1Fu2) in P6122 crystal form Deposited 2013-06-11	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 4 PDB declaration: tetrameric	Chain C 31–146（116 aa） Fragment：FU1FU2, RESIDUES 31-146 Chain D 31–146（116 aa） Fragment：FU1FU2, RESIDUES 31-146	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 4	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 4.30 Å R-free 0.268
4BSU Structure of the ectodomain of LGR5 in complex with R-spondin-1 (Fu1Fu2) in C2 crystal form Deposited 2013-06-11	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 4 PDB declaration: tetrameric	Chain G 31–146（116 aa） Chain H 31–146（116 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 3.20 Å R-free 0.287
4BSU Structure of the ectodomain of LGR5 in complex with R-spondin-1 (Fu1Fu2) in C2 crystal form Deposited 2013-06-11	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Other combination Heteromer；Protein × 4 PDB declaration: tetrameric	Chain C 31–146（116 aa） Chain D 31–146（116 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 3.20 Å R-free 0.287
4CDK Structure of ZNRF3-RSPO1 Deposited 2013-11-01	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain E 31–145（115 aa） Fragment：FURIN-LIKE DOMAIN, RESIDUES 31-145	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions 0.2M SODIUM BROMIDE AND 20% W/V PEG 3350	Resolution 2.80 Å R-free 0.246
4CDK Structure of ZNRF3-RSPO1 Deposited 2013-11-01	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain G 31–145（115 aa） Fragment：FURIN-LIKE DOMAIN, RESIDUES 31-145	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions 0.2M SODIUM BROMIDE AND 20% W/V PEG 3350	Resolution 2.80 Å R-free 0.246
4CDK Structure of ZNRF3-RSPO1 Deposited 2013-11-01	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 3 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain H 31–145（115 aa） Fragment：FURIN-LIKE DOMAIN, RESIDUES 31-145	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions 0.2M SODIUM BROMIDE AND 20% W/V PEG 3350	Resolution 2.80 Å R-free 0.246
4CDK Structure of ZNRF3-RSPO1 Deposited 2013-11-01	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 4 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain F 31–145（115 aa） Fragment：FURIN-LIKE DOMAIN, RESIDUES 31-145	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions 0.2M SODIUM BROMIDE AND 20% W/V PEG 3350	Resolution 2.80 Å R-free 0.246
4KNG Crystal structure of human LGR5-RSPO1-RNF43 Deposited 2013-05-09	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain M 35–144（110 aa） Fragment：furin repeats Chain P 35–144（110 aa） Fragment：furin repeats	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 NI NICKEL (II) ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8；293 K；10% PEG4000, 0.2M ammonium sulfate, 7% Sucrose and 0.1 M TRIS pH 8.0, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.50 Å R-free 0.276
4KT1 Complex of R-spondin 1 with LGR4 extracellular domain Deposited 2013-05-19	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 2 PDB declaration: dimeric	Chain E 39–128（90 aa） Fragment：UNP residues 39-128	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6；291 K；PEG, pH 6.0, VAPOR DIFFUSION, SITTING DROP, temperature 291K	Resolution 2.50 Å R-free 0.209
4LI2 Crystal Structures of Lgr4 and its complex with R-spondin1 Deposited 2013-07-02	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 33–144（112 aa） Fragment：FU 1 and FU 2 repeat residues 33-144	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 5.7；298 K；22% PEG3350, 200 mM MgCl2 and 100 mM BisTris pH 5.7, vapor diffusion, temperature 298K	Resolution 3.19 Å R-free 0.284
8WVU Cryo-EM structure of LGR4 in complex with Rspo1 and RNF43 Deposited 2023-10-24	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain B 35–144（110 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen PROPANE	Resolution 3.61 Å

11 other PDB entries and 16 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	RSPO1_HUMAN
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain C； PDBConstruct 1–102； UniProt 34–135 Author chain E； PDBConstruct 1–102； UniProt 34–135

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

Download Download SAXS (.dat) P(r) (.pr.out) CIF

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	4qxf
Deposition date deposition_date	2014-07-20
Structure title title	crystal structure of human LGR4 and Rspo1
Keywords keywords	ligand-receptor complex, LRR repeats, Beta-Hairpins, Glucosylation, Cell Membrane, MEMBRANE PROTEIN; MEMBRANE PROTEIN
Experimental Method method	X-RAY DIFFRACTION

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3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier	34.91 Å
Radius of gyration Rg (electron density) rg_electron	34.42 Å
Forward intensity I(0) i0	111504000.00
Molecular weight molecular_weight	83658.0 kDa
Excluded volume excluded_volume	104630 Å³
Envelope volume envelope_volume	141660 Å³
Hydration-shell volume shell_volume	36117 Å³
Envelope diameter envelope_diameter	125.6 Å
Shell Rg shell_rg	38.66 Å
Envelope Rg envelope_rg	34.55 Å
Shape Rg shape_rg	34.34 Å
Total Rg total_rg	35.02 Å
Total atoms total_atoms	5859
Residues n_residues	758
Spherical-harmonic order n_harmonics	20
q range q_range	— – 0.5000 Å⁻¹
Data points n_points	101
Shell type shell_type	directional
Solvent electron density solvent_density	0.3340 e/Å³
Shell contrast contrast_shell	0.0300 e/Å³
CRYSOL version crysol_version	4.1.3

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4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax	117.0 Å
Rg (real space) rg_real	35.00 Å
Rg uncertainty (real space) rg_real_error	0.95 Å
I(0) (real space) i0_real	1.1150e+08
I(0) uncertainty (real space) i0_real_error	1.8420e+06
Rg (reciprocal space) rg_reciprocal	34.95 Å
I(0) (reciprocal space) i0_reciprocal	111500000.0000
Solution quality estimate total_estimate	0.8867
Solution quality rating solution_quality	GOOD a GOOD solution
P(r) peaks n_peaks	1
Primary peak position r_peak_primary	114.4 Å
Skewness Skewness skewness	0.347
Kurtosis Kurtosis kurtosis	-0.415
Angular range angular_range	— – 0.2250 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	13710000.0000
Real-space data points n_real_points	46
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.901; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.949; Smooth: 0.871

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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Description description	Leucine-rich repeat-containing G-protein coupled receptor 4, Variable lymphocyte receptor B
Molecular weight formula_weight	33151.8 kDa
Mutation mutation	D75G
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	6122

MDPLCAAPCSCDGDRRVDCSGKGLTAVPEGLSAFTQALDISMNNITQLPEGAFKNFPFLEELQLAGNDLSFIHPKALSGLKELKVLTLQNNQLKTVPSEAIRGLSALQSLRLDANHITSVPEDSFEGLVQLRHLWLDDNSLTEVPVHPLSNLPTLQALTLALNKISSIPDFAFTNLSSLVVLHLHNNKIRSLSQHCFDGLDNLETLDLNYNNLGEFPQAIKALPSLKELALDTNQLKSVPDGIFDRLTSLQKIWLHTNPWDCSCPRIDYLSRWLNKNSQKEQGSAKCSGSGKPVRSIICPT

来源 Source

来源生物 organism	Eptatretus burgeri
通用名 common_name	human, Inshore hagfish
NCBI Class编号 ncbi_taxonomy_id	7764
宿主生物 host_organism	Spodoptera frugiperda

Entity 2 Entity 2 polymer

Description description	R-spondin-1
Molecular weight formula_weight	11185.0 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	E,C

AEGSQACAKGCELCSEVNGCLKCSPKLFILLERNDIRQVGVCLPSCPPGYFDARNPDMNKCIKCKIEHCEACFSHNFCTKCKEGLYLHKGRCYPACPEGSSA

来源 Source

来源生物 organism	Homo sapiens
通用名 common_name	human
NCBI Class编号 ncbi_taxonomy_id	9606
宿主生物 host_organism	Spodoptera frugiperda

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	263

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7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d4qxfc_
Class class	g — Small proteins
Fold Fold fold	g.3 — Knottins (small inhibitors, toxins, lectins)
Superfamily Superfamily superfamily	g.3.9 — Growth factor receptor domain
Family Family family	g.3.9.1 — Growth factor receptor domain

Domain ID domain_id	d4qxfe_
Class class	g — Small proteins
Fold Fold fold	g.3 — Knottins (small inhibitors, toxins, lectins)
Superfamily Superfamily superfamily	g.3.9 — Growth factor receptor domain
Family Family family	g.3.9.1 — Growth factor receptor domain

CATH v4.4 (2 domains)

Domain ID domain_id	4qxfC00
Class class	2 — Mainly Beta
Architecture architecture	10 — Ribbon
Topology topology	220 — Hormone Receptor, Insulin-like Growth Factor Receptor 1; Chain A domain 2
Homologous superfamily homologous superfamily	10 — Hormone Receptor, Insulin-like Growth Factor Receptor 1; Chain A, domain 2

Domain ID domain_id	4qxfE00
Class class	2 — Mainly Beta
Architecture architecture	10 — Ribbon
Topology topology	220 — Hormone Receptor, Insulin-like Growth Factor Receptor 1; Chain A domain 2
Homologous superfamily homologous superfamily	10 — Hormone Receptor, Insulin-like Growth Factor Receptor 1; Chain A, domain 2

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8. Citations (1)

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Unit-cell length a length_a	44.867 Å
Unit-cell length b length_b	137.913 Å
Unit-cell length c length_c	82.560 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	100.13 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	2.250 Å
Low-resolution limit resolution_low	50.000 Å
R factor r_factor	0.2147
R_work r_work	0.2132
R_free r_free	0.2427

fit	/app/data/saxs_computation/qx/4qxf/4qxf.fit
pddf	/app/data/pr_computation/qx/4qxf/4qxf.pr.out
profile	/app/data/saxs_computation/qx/4qxf/4qxf.dat

crystal structure of human LGR4 and Rspo1

1. Protein Identity and Related Structures Protein Identity & Related Structures

Leucine-rich repeat-containing G-protein coupled receptor 4, Variable lymphocyte receptor B

State in the Current Structure

Other States of the Same Protein in the Database

Leucine-rich repeat-containing G-protein coupled receptor 4, Variable lymphocyte receptor B

State in the Current Structure

Other States of the Same Protein in the Database

R-spondin-1

State in the Current Structure

Other States of the Same Protein in the Database

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

2. Structure Basics 2. Structure Basics

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

5. Crystallography and Experiment 5. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

6. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

来源 Source

Entity 2 Entity 2 polymer

Polymer Polymer

来源 Source

Entity 3 Entity 3 water

7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

8. Citations (1)

9. Files and Curves (10)

Files (7)

Curves (3)