Interleukin-21 receptor
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 × 3 PDB declaration: trimeric(3) Consistent with protein copy count | Chain C; UniProt 202–232 | Fragment:UNP Residues 202-232 | Fab 5G12 light chain × 1 Fab 5G12 heavy chain × 1 PO4 PHOSPHATE ION × 1 MAN alpha-D-mannopyranose × 1 | X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;293 K;25% (w/v) polyethylene glycol 1500, 0.1 M succinate-phosphate-glycine, pH 7.0 | Resolution 1.60 Å R-free 0.221 |
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 6PLH | Assembly / Oligomeric State | Construct | Mutations and Modifications | Ligands, Ions and Non-polymers | Method and Experimental Conditions | Structure Quality |
|---|---|---|---|---|---|---|---|
| 3TGX IL-21:IL21R complex Deposited 2011-08-18 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Other combination Heteromer;Protein × 2 PDB declaration: dimeric |
Chain A
20–232(213 aa)
Fragment:Interleukin 21 receptor extracellular domain
|
Mutation:N78Q, N85Q, N106D, N116Q | MAN alpha-D-mannopyranose × 1 NI NICKEL (II) ION × 1 SO4 SULFATE ION × 4 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 5.5;291.3 K;1,8-1,9 M di-Ammonium sulphate and 0.1 M Sodium acetate, pH 5.5, VAPOR DIFFUSION, SITTING DROP, temperature 291.3K
|
Resolution 2.80 Å R-free 0.273 |
| 3TGX IL-21:IL21R complex Deposited 2011-08-18 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 2 Other combination Heteromer;Protein × 2 PDB declaration: dimeric |
Chain C
20–232(213 aa)
Fragment:Interleukin 21 receptor extracellular domain
|
Mutation:N78Q, N85Q, N106D, N116Q | MAN alpha-D-mannopyranose × 1 SO4 SULFATE ION × 6 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 5.5;291.3 K;1,8-1,9 M di-Ammonium sulphate and 0.1 M Sodium acetate, pH 5.5, VAPOR DIFFUSION, SITTING DROP, temperature 291.3K
|
Resolution 2.80 Å R-free 0.273 |
| 3TGX IL-21:IL21R complex Deposited 2011-08-18 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 3 Other combination Heteromer;Protein × 2 PDB declaration: dimeric |
Chain E
20–232(213 aa)
Fragment:Interleukin 21 receptor extracellular domain
|
Mutation:N78Q, N85Q, N106D, N116Q | MAN alpha-D-mannopyranose × 1 NI NICKEL (II) ION × 1 SO4 SULFATE ION × 4 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 5.5;291.3 K;1,8-1,9 M di-Ammonium sulphate and 0.1 M Sodium acetate, pH 5.5, VAPOR DIFFUSION, SITTING DROP, temperature 291.3K
|
Resolution 2.80 Å R-free 0.273 |
| 3TGX IL-21:IL21R complex Deposited 2011-08-18 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 4 Other combination Heteromer;Protein × 2 PDB declaration: dimeric |
Chain G
20–232(213 aa)
Fragment:Interleukin 21 receptor extracellular domain
|
Mutation:N78Q, N85Q, N106D, N116Q | MAN alpha-D-mannopyranose × 1 NI NICKEL (II) ION × 1 SO4 SULFATE ION × 6 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 5.5;291.3 K;1,8-1,9 M di-Ammonium sulphate and 0.1 M Sodium acetate, pH 5.5, VAPOR DIFFUSION, SITTING DROP, temperature 291.3K
|
Resolution 2.80 Å R-free 0.273 |
| 3TGX IL-21:IL21R complex Deposited 2011-08-18 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 5 Other combination Heteromer;Protein × 2 PDB declaration: dimeric |
Chain I
20–232(213 aa)
Fragment:Interleukin 21 receptor extracellular domain
|
Mutation:N78Q, N85Q, N106D, N116Q | MAN alpha-D-mannopyranose × 1 SO4 SULFATE ION × 4 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 5.5;291.3 K;1,8-1,9 M di-Ammonium sulphate and 0.1 M Sodium acetate, pH 5.5, VAPOR DIFFUSION, SITTING DROP, temperature 291.3K
|
Resolution 2.80 Å R-free 0.273 |
| 3TGX IL-21:IL21R complex Deposited 2011-08-18 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 6 Other combination Heteromer;Protein × 2 PDB declaration: dimeric |
Chain K
20–232(213 aa)
Fragment:Interleukin 21 receptor extracellular domain
|
Mutation:N78Q, N85Q, N106D, N116Q | MAN alpha-D-mannopyranose × 1 SO4 SULFATE ION × 6 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 5.5;291.3 K;1,8-1,9 M di-Ammonium sulphate and 0.1 M Sodium acetate, pH 5.5, VAPOR DIFFUSION, SITTING DROP, temperature 291.3K
|
Resolution 2.80 Å R-free 0.273 |
| 3TGX IL-21:IL21R complex Deposited 2011-08-18 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 7 Other combination Heteromer;Protein × 2 PDB declaration: dimeric |
Chain M
20–232(213 aa)
Fragment:Interleukin 21 receptor extracellular domain
|
Mutation:N78Q, N85Q, N106D, N116Q | MAN alpha-D-mannopyranose × 1 SO4 SULFATE ION × 4 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 5.5;291.3 K;1,8-1,9 M di-Ammonium sulphate and 0.1 M Sodium acetate, pH 5.5, VAPOR DIFFUSION, SITTING DROP, temperature 291.3K
|
Resolution 2.80 Å R-free 0.273 |
| 3TGX IL-21:IL21R complex Deposited 2011-08-18 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 8 Other combination Heteromer;Protein × 2 PDB declaration: dimeric |
Chain O
20–232(213 aa)
Fragment:Interleukin 21 receptor extracellular domain
|
Mutation:N78Q, N85Q, N106D, N116Q | MAN alpha-D-mannopyranose × 1 NI NICKEL (II) ION × 1 SO4 SULFATE ION × 5 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 5.5;291.3 K;1,8-1,9 M di-Ammonium sulphate and 0.1 M Sodium acetate, pH 5.5, VAPOR DIFFUSION, SITTING DROP, temperature 291.3K
|
Resolution 2.80 Å R-free 0.273 |
| 4NZD Interleukin 21 receptor Deposited 2013-12-12 | Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Other combination Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
20–232(213 aa)
|
Not recorded | MAN alpha-D-mannopyranose × 1 NA SODIUM ION × 3 CL CHLORIDE ION × 4 TLA L(+)-TARTARIC ACID × 2 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 8.5;278 K;5 mg/ml Protein in 10 mM Hepes, 150 mM NaCl, pH7.5
Crystalized in 1M Potassium sodium tartrate tetrahydrate, 3% W/V Peg5000 and 0.1 M tris Ph 8.5. Drops were 1:1, VAPOR DIFFUSION, SITTING DROP, temperature 278K
|
Resolution 2.75 Å R-free 0.275 |
| 4NZD Interleukin 21 receptor Deposited 2013-12-12 | Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 2 Other combination Monomer;Protein × 1 PDB declaration: monomeric |
Chain B
20–232(213 aa)
|
Not recorded | MAN alpha-D-mannopyranose × 1 CL CHLORIDE ION × 5 TLA L(+)-TARTARIC ACID × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 8.5;278 K;5 mg/ml Protein in 10 mM Hepes, 150 mM NaCl, pH7.5
Crystalized in 1M Potassium sodium tartrate tetrahydrate, 3% W/V Peg5000 and 0.1 M tris Ph 8.5. Drops were 1:1, VAPOR DIFFUSION, SITTING DROP, temperature 278K
|
Resolution 2.75 Å R-free 0.275 |
| 4NZD Interleukin 21 receptor Deposited 2013-12-12 | Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 3 Other combination Monomer;Protein × 1 PDB declaration: monomeric |
Chain C
20–232(213 aa)
|
Not recorded | MAN alpha-D-mannopyranose × 1 NA SODIUM ION × 2 CL CHLORIDE ION × 2 EDO 1,2-ETHANEDIOL × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 8.5;278 K;5 mg/ml Protein in 10 mM Hepes, 150 mM NaCl, pH7.5
Crystalized in 1M Potassium sodium tartrate tetrahydrate, 3% W/V Peg5000 and 0.1 M tris Ph 8.5. Drops were 1:1, VAPOR DIFFUSION, SITTING DROP, temperature 278K
|
Resolution 2.75 Å R-free 0.275 |
| 4NZD Interleukin 21 receptor Deposited 2013-12-12 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 4 Other combination Homooligomer;Protein × 6 PDB declaration: hexameric |
Chain A
20–232(213 aa)
Chain B
20–232(213 aa)
Chain C
20–232(213 aa)
|
Not recorded | MAN alpha-D-mannopyranose × 6 NA SODIUM ION × 10 CL CHLORIDE ION × 22 TLA L(+)-TARTARIC ACID × 6 EDO 1,2-ETHANEDIOL × 2 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 8.5;278 K;5 mg/ml Protein in 10 mM Hepes, 150 mM NaCl, pH7.5
Crystalized in 1M Potassium sodium tartrate tetrahydrate, 3% W/V Peg5000 and 0.1 M tris Ph 8.5. Drops were 1:1, VAPOR DIFFUSION, SITTING DROP, temperature 278K
|
Resolution 2.75 Å R-free 0.275 |
| 7KQ7 Crystal structure of IL21R in complex with an antibody Fab fragment Deposited 2020-11-13 | Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 3 PDB declaration: trimeric |
Chain B
20–233(214 aa)
|
Not recorded | No recorded non-water small molecule |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, HANGING DROP;pH 6.5;300 K;10% PEG MME 5000 and 0.1M MES, pH 6.5
|
Resolution 2.20 Å R-free 0.240 |
| 8ENT Interleukin-21 signaling complex with IL-21R and IL-2Rg Deposited 2022-09-30 | 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
20–229(210 aa)
|
Mutation:N78Q, N85Q, N106D, N116Q | NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 EDO 1,2-ETHANEDIOL × 2 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 8;295 K;0.1M Tris pH 8, 20% PEG 6000
|
Resolution 2.83 Å R-free 0.300 |
| 8ENT Interleukin-21 signaling complex with IL-21R and IL-2Rg Deposited 2022-09-30 | Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 2 Protein heterocomplex Heteromer;Protein × 3 PDB declaration: trimeric |
Chain E
20–229(210 aa)
|
Mutation:N78Q, N85Q, N106D, N116Q | NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 EDO 1,2-ETHANEDIOL × 4 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 8;295 K;0.1M Tris pH 8, 20% PEG 6000
|
Resolution 2.83 Å R-free 0.300 |
| 8ENT Interleukin-21 signaling complex with IL-21R and IL-2Rg Deposited 2022-09-30 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 3 Other combination Heteromer;Protein × 3 PDB declaration: trimeric |
Chain H
20–229(210 aa)
|
Mutation:N78Q, N85Q, N106D, N116Q | 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;pH 8;295 K;0.1M Tris pH 8, 20% PEG 6000
|
Resolution 2.83 Å R-free 0.300 |
| 8ENT Interleukin-21 signaling complex with IL-21R and IL-2Rg Deposited 2022-09-30 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 4 Other combination Heteromer;Protein × 2 PDB declaration: dimeric |
Chain K
20–229(210 aa)
|
Mutation:N78Q, N85Q, N106D, N116Q | EDO 1,2-ETHANEDIOL × 6 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 8;295 K;0.1M Tris pH 8, 20% PEG 6000
|
Resolution 2.83 Å R-free 0.300 |
| 9E2T Structure of a de novo designed interleukin-21 mimetic complex with IL-21R and IL-2Rg Deposited 2024-10-22 | Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 3 PDB declaration: trimeric |
Chain B
20–228(209 aa)
Fragment:extracellular domain
|
Not recorded | NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 4 EDO 1,2-ETHANEDIOL × 5 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 6.5;298 K;0.2M Potassium thiocyanate, 0.1M Bis-Tris propane, pH 6.5, 20% w/v PEG 3350
|
Resolution 2.28 Å R-free 0.242 |
| 9E2T Structure of a de novo designed interleukin-21 mimetic complex with IL-21R and IL-2Rg Deposited 2024-10-22 | Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 2 Protein heterocomplex Heteromer;Protein × 3 PDB declaration: trimeric |
Chain E
20–228(209 aa)
Fragment:extracellular domain
|
Not recorded | NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 EDO 1,2-ETHANEDIOL × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 6.5;298 K;0.2M Potassium thiocyanate, 0.1M Bis-Tris propane, pH 6.5, 20% w/v PEG 3350
|
Resolution 2.28 Å R-free 0.242 |
| 9E2T Structure of a de novo designed interleukin-21 mimetic complex with IL-21R and IL-2Rg Deposited 2024-10-22 | Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 3 Protein heterocomplex Heteromer;Protein × 2 PDB declaration: dimeric |
Chain H
20–228(209 aa)
Fragment:extracellular domain
|
Not recorded | NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 EDO 1,2-ETHANEDIOL × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 6.5;298 K;0.2M Potassium thiocyanate, 0.1M Bis-Tris propane, pH 6.5, 20% w/v PEG 3350
|
Resolution 2.28 Å R-free 0.242 |
| 9E2T Structure of a de novo designed interleukin-21 mimetic complex with IL-21R and IL-2Rg Deposited 2024-10-22 | Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 4 Protein heterocomplex Heteromer;Protein × 2 PDB declaration: dimeric |
Chain J
20–228(209 aa)
Fragment:extracellular domain
|
Not recorded | NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 EDO 1,2-ETHANEDIOL × 2 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 6.5;298 K;0.2M Potassium thiocyanate, 0.1M Bis-Tris propane, pH 6.5, 20% w/v PEG 3350
|
Resolution 2.28 Å R-free 0.242 |
5 other PDB entries and 21 assemblies. Open the comparison page and filter oligomeric states
View Construct and Data Evidence
| UniProt name | IL21R_HUMAN |
| Isoform | — |
| PDB entities | 3 |
| Chains and sequence ranges | Author chain C; PDBConstruct 1–31; UniProt 202–232 |