SAXSdb — 1iar

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

PROTEIN (INTERLEUKIN-4)

Homo sapiens

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain A； UniProt 25–153	Not recorded	PROTEIN (INTERLEUKIN-4 RECEPTOR ALPHA CHAIN) × 1 （P24394）	X-RAY DIFFRACTION X-ray crystallization conditions：pH 8；pH 8.0	Resolution 2.30 Å R-free 0.289

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 1IAR	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1BBN THREE-DIMENSIONAL SOLUTION STRUCTURE OF HUMAN INTERLEUKIN-4 BY MULTI-DIMENSIONAL HETERONUCLEAR MAGNETIC RESONANCE SPECTROSCOPY Deposited 1992-05-01	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 25–153（129 aa）	Not recorded	No recorded non-water small molecule	SOLUTION NMR mmCIF provides none of the parsed conditions	Resolution not provided
1BCN THREE-DIMENSIONAL SOLUTION STRUCTURE OF HUMAN INTERLEUKIN-4 BY MULTI-DIMENSIONAL HETERONUCLEAR MAGNETIC RESONANCE SPECTROSCOPY Deposited 1992-05-01	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 25–153（129 aa）	Not recorded	No recorded non-water small molecule	SOLUTION NMR mmCIF provides none of the parsed conditions	Resolution not provided
1CYL ASPECTS OF RECEPTOR BINDING AND SIGNALLING OF INTERLEUKIN-4 INVESTIGATED BY SITE-DIRECTED MUTAGENESIS AND NMR SPECTROSCOPY Deposited 1994-02-21	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 25–153（129 aa）	Not recorded	No recorded non-water small molecule	SOLUTION NMR mmCIF provides none of the parsed conditions	Resolution not provided
1HIJ INTERLEUKIN-4 MUTANT WITH ARG 88 REPLACED WITH GLN (R88Q) Deposited 1995-06-01	Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 25–153（129 aa）	Mutation：R88Q	No recorded non-water small molecule	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 3.00 Å R-free 0.316
1HIK INTERLEUKIN-4 (WILD-TYPE) Deposited 1995-06-01	Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 25–153（129 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 2.60 Å R-free 0.324
1HZI INTERLEUKIN-4 MUTANT E9A Deposited 2001-01-25	Different mutation/modification 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 25–153（129 aa）	Mutation：E9A	SO4 SULFATE ION × 5	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.4；293 K；ammonium sulfate, sodium acetate, pH 5.4, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 2.05 Å R-free 0.246
1ITI THE HIGH RESOLUTION THREE-DIMENSIONAL SOLUTION STRUCTURE OF HUMAN INTERLEUKIN-4 DETERMINED BY MULTI-DIMENSIONAL HETERONUCLEAR MAGNETIC RESONANCE SPECTROSCOPY Deposited 1993-04-12	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 25–153（129 aa）	Not recorded	No recorded non-water small molecule	SOLUTION NMR mmCIF provides none of the parsed conditions	Resolution not provided
1ITL HUMAN INTERLEUKIN 4: THE SOLUTION STRUCTURE OF A FOUR-HELIX-BUNDLE PROTEIN Deposited 1992-02-08	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 25–153（129 aa）	Not recorded	No recorded non-water small molecule	SOLUTION NMR mmCIF provides none of the parsed conditions	Resolution not provided
1ITM ANALYSIS OF THE SOLUTION STRUCTURE OF HUMAN INTERLEUKIN 4 DETERMINED BY HETERONUCLEAR THREE-DIMENSIONAL NUCLEAR MAGNETIC RESONANCE TECHNIQUES Deposited 1994-02-28	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 25–153（129 aa）	Not recorded	No recorded non-water small molecule	SOLUTION NMR mmCIF provides none of the parsed conditions	Resolution not provided
1RCB CRYSTAL STRUCTURE OF HUMAN RECOMBINANT INTERLEUKIN-4 AT 2.25 ANGSTROMS RESOLUTION Deposited 1992-08-26	Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 25–153（129 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 2.25 Å
2B8U Crystal structure of wildtype human Interleukin-4 Deposited 2005-10-10	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 25–153（129 aa）	Not recorded	SO4 SULFATE ION × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；298 K；52% Ammonium sulfate, 0.1M Sodium citrate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.80 Å R-free 0.244
2B8X Crystal structure of the interleukin-4 variant F82D Deposited 2005-10-10	Different mutation/modification 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 25–153（129 aa）	Mutation：F82D	SO4 SULFATE ION × 5	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；298 K；52% Ammonium sulfate, 0.1M Sodium citrate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.70 Å R-free 0.248
2B8Y Crystal structure of the interleukin-4 variant T13DF82D Deposited 2005-10-10	Different mutation/modification 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 25–153（129 aa）	Mutation：T13D, F82D	SO4 SULFATE ION × 6	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；294 K；52% Ammonium sulfate, 0.1M Sodium citrate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 294K	Resolution 1.80 Å R-free 0.241
2B8Z Crystal structure of the interleukin-4 variant R85A Deposited 2005-10-10	Different mutation/modification 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 25–153（129 aa）	Mutation：R85A	SO4 SULFATE ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；294 K；52% Ammonium sulfate, 0.1M Sodium citrate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 294K	Resolution 2.50 Å R-free 0.264
2B90 Crystal structure of the interleukin-4 variant T13DR85A Deposited 2005-10-10	Different mutation/modification 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 25–153（129 aa）	Mutation：T13D, R85A	SO4 SULFATE ION × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；294 K；52% Ammonium sulfate, 0.1M Sodium citrate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 294K	Resolution 2.10 Å R-free 0.249
2B91 Crystal structure of the interleukin-4 variant F82DR85A Deposited 2005-10-10	Different mutation/modification 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 25–153（129 aa）	Mutation：F82D, R85A	SO4 SULFATE ION × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；294 K；52% Ammonium sulfate, 0.1M Sodium citrate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 294K	Resolution 2.00 Å R-free 0.258
2CYK ASPECTS OF RECEPTOR BINDING AND SIGNALLING OF INTERLEUKIN-4 INVESTIGATED BY SITE-DIRECTED MUTAGENESIS AND NMR SPECTROSCOPY Deposited 1994-08-16	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 25–153（129 aa）	Not recorded	No recorded non-water small molecule	SOLUTION NMR mmCIF provides none of the parsed conditions	Resolution not provided
2D48 Crystal structure of the Interleukin-4 variant T13D Deposited 2005-10-11	Different mutation/modification 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 25–153（129 aa）	Mutation：T13D	SO4 SULFATE ION × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；298 K；52% Ammonium sulfate, 0.1M Sodium citrate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.65 Å R-free 0.247
2INT CRYSTAL STRUCTURE OF RECOMBINANT HUMAN INTERLEUKIN-4 Deposited 1993-07-22	Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 25–153（129 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 2.35 Å
3BPL Crystal structure of the IL4-IL4R-Common Gamma ternary complex Deposited 2007-12-18	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 25–153（129 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；295 K；10% PEG8K, 8% ethylene glycol, 0.1M HEPES pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 295K	Resolution 2.93 Å R-free 0.297
3BPN Crystal structure of the IL4-IL4R-IL13Ra ternary complex Deposited 2007-12-18	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 25–153（129 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；295 K；10% PEG8K, 0.1M cacodylate pH 6.5, 0.16M calcium acetate, 20% glycerol, VAPOR DIFFUSION, SITTING DROP, temperature 295K	Resolution 3.02 Å R-free 0.304
4YDY CRYSTAL STRUCTURE OF DARPIN 44C12V5 IN COMPLEX WITH HUMAN IL-4 Deposited 2015-02-23	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain I 25–153（129 aa） Fragment：UNP RESIDUES 25-153	Not recorded	GOL GLYCEROL × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.5；293 K；18% PEG 3350, 0.2 M LITHIUM SULFATE, 0.1 M SODIUM ACETATE, PH 4.5 0.1 M SODIUM ACETATE, PH 4.5, 18% GLYCEROL	Resolution 2.00 Å R-free 0.239
4YDY CRYSTAL STRUCTURE OF DARPIN 44C12V5 IN COMPLEX WITH HUMAN IL-4 Deposited 2015-02-23	Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain J 25–153（129 aa） Fragment：UNP RESIDUES 25-153	Not recorded	ACT ACETATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.5；293 K；18% PEG 3350, 0.2 M LITHIUM SULFATE, 0.1 M SODIUM ACETATE, PH 4.5 0.1 M SODIUM ACETATE, PH 4.5, 18% GLYCEROL	Resolution 2.00 Å R-free 0.239
5FHX CRYSTAL STRUCTURE OF CODV IN COMPLEX WITH IL4 AT 2.55 Ang. RESOLUTION. Deposited 2015-12-22	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 30–153（124 aa）	Not recorded	PO4 PHOSPHATE ION × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.4；292 K；PEG 3350 20%, K-Acetate 0.20M	Resolution 2.55 Å R-free 0.249
6OEL Engineered Fab bound to IL-4 receptor Deposited 2019-03-27	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: pentameric	Chain A 25–153（129 aa） Fragment：UNP residues 25-153	Mutation：K117R,T118V,R121Q,E122S,Y124W,S125F,S128G,S129A	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 5 NO3 NITRATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；295 K；22.5% PurePEG (Microlytic), 0.1 M sodium citrate, pH 5.5, 0.6 M ammonium nitrate	Resolution 3.10 Å R-free 0.256
8A4F Human Interleukin-4 mutant - C3T-IL4 Deposited 2022-06-11	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 25–153（129 aa）	Mutation：C3T	No recorded non-water small molecule	SOLUTION NMR NMR measurement conditions pH 5；298 K；Ionic strength (raw mmCIF value) 25；Pressure 1 NMR sample composition 1.5 mM [U-100% 15N] Interleukin-4 mutant, C3T-IL4, 90% H2O/10% D2O \| 90% H2O/10% D2O	Resolution not provided
8CGF Interleukin-4 (wild type) pH 2.4 Deposited 2023-02-04	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 25–153（129 aa）	Not recorded	No recorded non-water small molecule	SOLUTION NMR NMR measurement conditions pH 2.4；298 K；Ionic strength (raw mmCIF value) 20 mM NaPi；Pressure 1 NMR sample composition 1.5 mM [U-13C; U-15N] Interleukin-4, 95% H2O/5% D2O \| 95% H2O/5% D2O	Resolution not provided
8CH7 RDC-refined Interleukin-4 (wild type) pH 5.6 Deposited 2023-02-07	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 25–153（129 aa）	Not recorded	No recorded non-water small molecule	SOLUTION NMR NMR measurement conditions pH 5.6；298 K；Ionic strength (raw mmCIF value) 10 mM；Pressure 1 NMR sample composition 1.5 mM [U-13C; U-15N] Interleukin-4 (IL-4), 95% H2O/5% D2O \| 95% H2O/5% D2O	Resolution not provided

27 other PDB entries and 28 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	IL4_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–129； UniProt 25–153

PROTEIN (INTERLEUKIN-4 RECEPTOR ALPHA CHAIN)

Homo sapiens

UniProt P24394

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain B； UniProt 26–232	Fragment：EXTRACELLULAR DOMAIN Mutation：M1F, C182A	PROTEIN (INTERLEUKIN-4) × 1 （P05112）	X-RAY DIFFRACTION X-ray crystallization conditions：pH 8；pH 8.0	Resolution 2.30 Å R-free 0.289

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 1IAR	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1IRS IRS-1 PTB DOMAIN COMPLEXED WITH A IL-4 RECEPTOR PHOSPHOPEPTIDE, NMR, MINIMIZED AVERAGE STRUCTURE Deposited 1996-03-22	Different construct Different mutation/modification Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 489–499（11 aa）	Non-standard monomer：Yes (specific site not provided by mmCIF)	No recorded non-water small molecule	SOLUTION NMR mmCIF provides none of the parsed conditions	Resolution not provided
3BPL Crystal structure of the IL4-IL4R-Common Gamma ternary complex Deposited 2007-12-18	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric	Chain B 27–227（201 aa） Fragment：Extracellular domain, residues 27-227	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；295 K；10% PEG8K, 8% ethylene glycol, 0.1M HEPES pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 295K	Resolution 2.93 Å R-free 0.297
3BPN Crystal structure of the IL4-IL4R-IL13Ra ternary complex Deposited 2007-12-18	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain B 27–227（201 aa） Fragment：Extracellular domain, residues 27-227	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；295 K；10% PEG8K, 0.1M cacodylate pH 6.5, 0.16M calcium acetate, 20% glycerol, VAPOR DIFFUSION, SITTING DROP, temperature 295K	Resolution 3.02 Å R-free 0.304
3BPO Crystal structure of the IL13-IL4R-IL13Ra ternary complex Deposited 2007-12-18	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric	Chain B 27–227（201 aa） Fragment：Extracellular domain, residues 27-227	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6；295 K；12% PEG8K, 8% ethlyene glycol, 0.1M ammonium citrate pH 6.0, VAPOR DIFFUSION, SITTING DROP, temperature 295K	Resolution 3.00 Å R-free 0.312
5E4E Engineered Interleukin-13 bound to receptor Deposited 2015-10-05	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain B 26–228（203 aa） Fragment：UNP residues 26-228	Not recorded	SO4 SULFATE ION × 7 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 4.2；293 K；lithium sulfate, phosphate/citrate pH 4.2, PEG 1000	Resolution 3.00 Å R-free 0.288
6OEL Engineered Fab bound to IL-4 receptor Deposited 2019-03-27	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: pentameric	Chain B 27–224（198 aa） Fragment：UNP residues 27-224	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 5 NO3 NITRATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；295 K；22.5% PurePEG (Microlytic), 0.1 M sodium citrate, pH 5.5, 0.6 M ammonium nitrate	Resolution 3.10 Å R-free 0.256
6WGL Dupilumab fab with Crystal Kappa design complexed with human IL-4 receptor Deposited 2020-04-05	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric	Chain C 26–232（207 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；294 K；100mM Hepes pH 7.5, 25% PEG MME 550	Resolution 2.82 Å R-free 0.304
8Z8L structure of IL-4Ra in complex with an nanobody 4E9 Deposited 2024-04-22	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 B 26–232（207 aa）	Mutation：C182A	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 6；298 K；1.4 M Sodium malonate dibasic monohydrate pH 6.0	Resolution 3.96 Å R-free 0.334

8 other PDB entries and 8 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	IL4RA_HUMAN
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–207； UniProt 26–232

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.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	1iar
Deposition date deposition_date	1999-02-25
Structure title title	INTERLEUKIN-4 / RECEPTOR ALPHA CHAIN COMPLEX
Keywords keywords	CYTOKINE RECEPTOR, INTERLEUKIN-4, CYTOKINE-RECEPTOR COMPLEX; CYTOKINE/RECEPTOR
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	24.25 Å
Radius of gyration Rg (electron density) rg_electron	23.46 Å
Forward intensity I(0) i0	23368800.00
Molecular weight molecular_weight	36459.0 kDa
Excluded volume excluded_volume	45485 Å³
Envelope volume envelope_volume	55999 Å³
Hydration-shell volume shell_volume	21021 Å³
Envelope diameter envelope_diameter	82.3 Å
Shell Rg shell_rg	29.01 Å
Envelope Rg envelope_rg	23.78 Å
Shape Rg shape_rg	23.46 Å
Total Rg total_rg	24.20 Å
Total atoms total_atoms	2565
Residues n_residues	317
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	81.3 Å
Rg (real space) rg_real	24.27 Å
Rg uncertainty (real space) rg_real_error	0.61 Å
I(0) (real space) i0_real	2.3370e+07
I(0) uncertainty (real space) i0_real_error	3.2230e+05
Rg (reciprocal space) rg_reciprocal	24.27 Å
I(0) (reciprocal space) i0_reciprocal	23370000.0000
Solution quality estimate total_estimate	0.8872
Solution quality rating solution_quality	GOOD a GOOD solution
P(r) peaks n_peaks	1
Primary peak position r_peak_primary	24.5 Å
Skewness Skewness skewness	0.304
Kurtosis Kurtosis kurtosis	-0.472
Angular range angular_range	— – 0.3250 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	5140000.0000
Real-space data points n_real_points	64
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.889; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.891; Smooth: 0.972

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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	PROTEIN (INTERLEUKIN-4)
Molecular weight formula_weight	14989.2 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	2795

HKCDITLQEIIKTLNSLTEQKTLCTELTVTDIFAASKNTTEKETFCRAATVLRQFYSHHEKDTRCLGATAQQFHRHKQLIRFLKRLDRNLWGLAGLNSCPVKEANQSTLENFLERLKTIMREKYSKCSS

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	Escherichia coli

Entity 2 Entity 2 polymer

Description description	PROTEIN (INTERLEUKIN-4 RECEPTOR ALPHA CHAIN)
Molecular weight formula_weight	23738.6 kDa
Mutation mutation	M1F, C182A
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

FKVLQEPTCVSDYMSISTCEWKMNGPTNCSTELRLLYQLVFLLSEAHTCIPENNGGAGCVCHLLMDDVVSADNYTLDLWAGQQLLWKGSFKPSEHVKPRAPGNLTVHTNVSDTLLLTWSNPYPPDNYLYNHLTYAVNIWSENDPADFRIYNVTYLEPSLRIAASTLKSGISYRARVRAWAQAYNTTWSEWSPSTKWHNSYREPFEQH

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	Escherichia coli

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	230

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7. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d1iara_
Class class	a — All alpha proteins
Fold Fold fold	a.26 — 4-helical cytokines
Superfamily Superfamily superfamily	a.26.1 — 4-helical cytokines
Family Family family	a.26.1.2 — Short-chain cytokines

Domain ID domain_id	d1iarb1
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.2 — Fibronectin type III
Family Family family	b.1.2.1 — Fibronectin type III

Domain ID domain_id	d1iarb2
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.2 — Fibronectin type III
Family Family family	b.1.2.1 — Fibronectin type III

CATH v4.4 (3 domains)

Domain ID domain_id	1iarA00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	1250 — Growth Hormone; Chain: A;
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1iarB01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

Domain ID domain_id	1iarB02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	10 — Immunoglobulins

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8. Citations (2)

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Unit-cell length a length_a	49.720 Å
Unit-cell length b length_b	67.980 Å
Unit-cell length c length_c	108.460 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.300 Å
Low-resolution limit resolution_low	25.000 Å
R factor r_factor	—
R_work r_work	0.2180
R_free r_free	0.2890

fit	/app/data/saxs_computation/ia/1iar/1iar.fit
pddf	/app/data/pr_computation/ia/1iar/1iar.pr.out
profile	/app/data/saxs_computation/ia/1iar/1iar.dat

INTERLEUKIN-4 / RECEPTOR ALPHA CHAIN COMPLEX

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

PROTEIN (INTERLEUKIN-4)

State in the Current Structure

Other States of the Same Protein in the Database

PROTEIN (INTERLEUKIN-4 RECEPTOR ALPHA CHAIN)

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) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

8. Citations (2)

9. Files and Curves (10)

Files (7)

Curves (3)