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Protein Structures and Oligomeric States

Enter a protein name, UniProt accession or PDB ID. Name searches ask you to confirm the protein identity before related structures are queried.

Current Protein Identity：Q02223 New Search
11PDB entries
13Biological assembly
29chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification Different assembly state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics

Difference tags compare only the current result set; every original PDB and assembly record remains separate.

Related-Structure Differences

Each row represents one biological assembly in one PDB entry; multiple monomers of the same protein are listed separately.

PDB Entry Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Experimental Method Experimental Conditions Structure Quality
1OQD Crystal structure of sTALL-1 and BCMA Deposited 2003-03-07 Assembly 1 Protein heterocomplex Heteromer；Protein × 108 PDB declaration: 108-meric（108） Consistent with protein count
Chain K 8–46（39 aa） Fragment：extracellular domain
Chain L 8–46（39 aa） Fragment：extracellular domain
Chain M 8–46（39 aa） Fragment：extracellular domain
Chain N 8–46（39 aa） Fragment：extracellular domain
Chain O 8–46（39 aa） Fragment：extracellular domain
Chain P 8–46（39 aa） Fragment：extracellular domain
Chain Q 8–46（39 aa） Fragment：extracellular domain
Chain R 8–46（39 aa） Fragment：extracellular domain
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 9；277 K；dioxane, pH 9.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K
Resolution 2.60 Å R-free 0.260
1XU2 The crystal structure of APRIL bound to BCMA Deposited 2004-10-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain R 5–51（47 aa） Fragment：BCMA ECD
Chain S 5–51（47 aa） Fragment：BCMA ECD
Chain T 5–51（47 aa） Fragment：BCMA ECD
Not recorded NI NICKEL (II) ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；292 K；well solution: 0.1M MES, 5% Peg 8000, 10% Peg 1000, pH 5.0, VAPOR DIFFUSION, SITTING DROP, temperature 292K
Resolution 2.35 Å R-free 0.213
2KN1 Solution NMR Structure of BCMA Deposited 2009-08-11 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 2–50（49 aa） Fragment：residues 2-50
Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 6；Ionic strength (raw mmCIF value) 10；Pressure ambient
NMR sample composition 900 uM BCMA, 10 mM sodium phosphate, 0.02 % sodium azide, 95% H2O, 5% D2O | 95% H2O/5% D2O
Resolution not provided
4ZFO J22.9-xi: chimeric mouse/human antibody against human BCMA (CD269) Deposited 2015-04-21 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain F 1–54（54 aa） Fragment：Extracellular (N-terminal) domain, UNP residues 1-54
Not recorded CU COPPER (II) ION × 1 BTB 2-[BIS-(2-HYDROXY-ETHYL)-AMINO]-2-HYDROXYMETHYL-PROPANE-1,3-DIOL × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；293.15 K；1 microliter of the complex at 8 mg/ml with 2 microliters of 21% PEG 3350, 0.1 M BisTris pH 6.5 and 5 mM CuCl2
Resolution 1.90 Å R-free 0.209
4ZFO J22.9-xi: chimeric mouse/human antibody against human BCMA (CD269) Deposited 2015-04-21 Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain K 1–54（54 aa） Fragment：Extracellular (N-terminal) domain, UNP residues 1-54
Not recorded CU COPPER (II) ION × 2 BTB 2-[BIS-(2-HYDROXY-ETHYL)-AMINO]-2-HYDROXYMETHYL-PROPANE-1,3-DIOL × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；293.15 K；1 microliter of the complex at 8 mg/ml with 2 microliters of 21% PEG 3350, 0.1 M BisTris pH 6.5 and 5 mM CuCl2
Resolution 1.90 Å R-free 0.209
6J7W Crystal Structure of Human BCMA in complex with UniAb(TM) VH Deposited 2019-01-18 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain C 6–44（39 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4；293 K；0.2M sodium malonate pH 4.0 and 20% PEG 3350
Resolution 2.60 Å R-free 0.271
6J7W Crystal Structure of Human BCMA in complex with UniAb(TM) VH Deposited 2019-01-18 Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain D 6–44（39 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4；293 K；0.2M sodium malonate pH 4.0 and 20% PEG 3350
Resolution 2.60 Å R-free 0.271
8HXQ Nanobody1 in complex with human BCMA ECD Deposited 2023-01-05 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain C 1–54（54 aa）
Chain D 1–54（54 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.1；293 K；0.2 M Ammonium sulfate, 20% w/v Polyethylene glycol 3350, pH6.1
Resolution 2.40 Å R-free 0.274
8HXR Nanobody2 in complex with human BCMA ECD Deposited 2023-01-05 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain C 1–54（54 aa）
Chain D 1–54（54 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；293 K；1.8 M Sodium acetate trihydrate, 0.1 M Bis-Tris Propane pH7.0
Resolution 2.70 Å R-free 0.287
8QY9 J22.9-H, fully humanized Fab Fragment based on chimeric J22.9-xi IgG against BCMA Deposited 2023-10-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 7–41（35 aa）
Not recorded CU COPPER (II) ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；293.15 K；14% PEG 3350 100 mM BisTris 7.5 mM Cu(II)
Resolution 3.10 Å R-free 0.301
8QYA J22.9-FNY, fully humanized, CDR optimized Fab Fragment based on chimeric J22.9-xi IgG against BCMA; with VH CDR2 glycosylation Deposited 2023-10-25 Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 6–41（36 aa）
Not recorded CU COPPER (II) ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；293 K；PEG 3350 CuCl2 BisTris
Resolution 2.72 Å R-free 0.299
8QYB J22.9-ISY, fully humanized and CDR optimized Fab Fragment based on chimeric J22.9-xi IgG against BCMA Deposited 2023-10-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 7–41（35 aa）
Not recorded CU COPPER (II) ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；293 K；14% PEG 3350 7.5 mM CuCl2 BisTris
Resolution 3.09 Å R-free 0.288
9MQO Crystal structure of BCMA in complex with CA10v2 Fab Deposited 2025-01-04 Assembly 1 Protein heterocomplex Heteromer；Protein × 18 PDB declaration: 18-meric（18） Consistent with protein count
Chain A 1–54（54 aa）
Chain D 1–54（54 aa）
Chain G 1–54（54 aa）
Chain J 1–54（54 aa）
Chain M 1–54（54 aa）
Chain P 1–54（54 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；0.18 M Sodium Chloride, 0.09 M Phosphate/citrate pH 4.2, 20 % w/v PEG 8000, 0.1M Sodium Malonate
Resolution 3.18 Å R-free 0.272

This page presents structural evidence recorded in PDB/mmCIF.“No recorded non-water small molecule” does not prove that the experimental sample was ligand-free; experimental conditions belong to the PDB experiment, while ligands and copy counts are shown for each biological assembly.