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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：P27918 New Search
14PDB entries
19Biological assembly
34chain/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
1W0R Solution structure of dimeric form of properdin by X-ray solution scattering and analytical ultracentrifugation Deposited 2004-06-09 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 28–469（442 aa） Fragment：RESIDUES 28-469
Not recorded No recorded non-water small molecule SOLUTION SCATTERING mmCIF provides none of the parsed conditions Resolution not provided
1W0R Solution structure of dimeric form of properdin by X-ray solution scattering and analytical ultracentrifugation Deposited 2004-06-09 Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain B 28–469（442 aa） Fragment：RESIDUES 28-469
Not recorded No recorded non-water small molecule SOLUTION SCATTERING mmCIF provides none of the parsed conditions Resolution not provided
1W0S Solution structure of trimeric form of properdin by X-ray solution scattering and analytical ultracentrifugation Deposited 2004-06-09 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 28–469（442 aa） Fragment：RESIDUES 28-469
Not recorded No recorded non-water small molecule SOLUTION SCATTERING mmCIF provides none of the parsed conditions Resolution not provided
1W0S Solution structure of trimeric form of properdin by X-ray solution scattering and analytical ultracentrifugation Deposited 2004-06-09 Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain B 28–469（442 aa） Fragment：RESIDUES 28-469
Not recorded No recorded non-water small molecule SOLUTION SCATTERING mmCIF provides none of the parsed conditions Resolution not provided
1W0S Solution structure of trimeric form of properdin by X-ray solution scattering and analytical ultracentrifugation Deposited 2004-06-09 Assembly 3 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain C 28–469（442 aa） Fragment：RESIDUES 28-469
Not recorded No recorded non-water small molecule SOLUTION SCATTERING mmCIF provides none of the parsed conditions Resolution not provided
6RUR Structure of the SCIN stabilized C3bBb convertase bound to properdin Deposited 2019-05-29 Assembly 1 Other combination Heteromer；Protein × 12 PDB declaration: dodecameric（12） Consistent with protein count
Chain U 28–255（228 aa）
Chain V 256–469（214 aa）
Chain X 28–255（228 aa）
Chain Y 256–469（214 aa）
Mutation：TSR2 and TSR3 are not modelled Mutation：TSR2 and TSR3 are not modelled MAN alpha-D-mannopyranose × 18 MG MAGNESIUM ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；277 K；50 mM MgAcetate 50 mM Mes 6.5 5 % w/v PEG 10K
Resolution 6.00 Å R-free 0.272
6RUS Structure of a functional properdin monomer Deposited 2019-05-29 Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 28–255（228 aa）
Not recorded MAN alpha-D-mannopyranose × 8 SO4 SULFATE ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6；292 K；1.1 M ammonium sulfate, 0.1 M sodium acetate pH 6.0, 1.2%(w/v) myo-inositol
Resolution 2.80 Å R-free 0.274
6RUS Structure of a functional properdin monomer Deposited 2019-05-29 Assembly 2 Other combination Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain B 256–469（214 aa）
Not recorded MAN alpha-D-mannopyranose × 7 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6；292 K；1.1 M ammonium sulfate, 0.1 M sodium acetate pH 6.0, 1.2%(w/v) myo-inositol
Resolution 2.80 Å R-free 0.274
6RUV Structure of the SCIN stabilized C3bBb convertase bound to Properdin and a the non-inhibitory nanobody hFPNb1 Deposited 2019-05-29 Assembly 1 Other combination Heteromer；Protein × 14 PDB declaration: tetradecameric（14） Consistent with protein count
Chain U 28–191（164 aa）
Chain V 256–469（214 aa）
Chain X 28–191（164 aa）
Chain Y 256–469（214 aa）
Not recorded MAN alpha-D-mannopyranose × 21 MG MAGNESIUM ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.8；277 K；100 mM NaCl, 5 % (w/v) PEG4000, 10 mM MgCl2, 100 mM Sodium Cacodylate trihydrate pH 5.8.
Resolution 6.15 Å R-free 0.271
6RV6 Structure of properdin lacking TSR3 based on anomalous data Deposited 2019-05-31 Assembly 1 Other combination Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 28–191（164 aa）
Chain B 256–469（214 aa）
Not recorded MAN alpha-D-mannopyranose × 12 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4；292 K；1.0 M lithium sulfate, 0.1 M sodium acetate pH 4.0, 0.1 M barium chloride
Resolution 3.51 Å R-free 0.283
6S08 Crystal Structure of Properdin (TSR domains N1 & 456) Deposited 2019-06-14 Assembly 1 Other combination Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 256–469（214 aa）
Chain B 26–132（107 aa）
Not recorded MAN alpha-D-mannopyranose × 8 PGE TRIETHYLENE GLYCOL × 1 NA SODIUM ION × 1 FUC alpha-L-fucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；291 K；Potassium Sulphate, PEG 3350
Resolution 2.03 Å R-free 0.248
6S0A Crystal Structure of Properdin (TSR domains N12 & 456) Deposited 2019-06-14 Assembly 1 Other combination Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 256–469（214 aa）
Chain B 26–191（166 aa）
Not recorded MAN alpha-D-mannopyranose × 10 FUC alpha-L-fucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.5；291 K；Sodium Citrate, PEG 3000
Resolution 2.52 Å R-free 0.267
6S0B Crystal Structure of Properdin in complex with the CTC domain of C3/C3b Deposited 2019-06-14 Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 256–469（214 aa）
Chain B 26–132（107 aa）
Not recorded MAN alpha-D-mannopyranose × 8 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5；291 K；Tacsimate, PEG 3350
Resolution 2.31 Å R-free 0.277
6SEJ Structure of a functional monomeric properdin lacking TSR3 Deposited 2019-07-30 Assembly 1 Other combination Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 28–191（164 aa）
Chain B 256–469（214 aa）
Not recorded MAN alpha-D-mannopyranose × 12 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4；292 K；1.0 M lithium sulfate, 0.1 M sodium acetate pH 4.0, 0.1 M barium chloride
Resolution 3.50 Å R-free 0.266
7B26 CirpA1 in complex with pseudo-monomeric Properdin lacking TSR2-3 Deposited 2020-11-26 Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–134（134 aa）
Chain B 256–469（214 aa）
Not recorded MAN alpha-D-mannopyranose × 9 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；0.15 M Potassium thiocyanate, 0.1 M Tris, pH 7.5, 18 % w/v PEG 5000 MME
Resolution 3.40 Å R-free 0.274
7NOZ Structure of the nanobody stablized properdin bound alternative pathway proconvertase C3b:FB:FP Deposited 2021-02-26 Assembly 1 Other combination Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain C 28–190（163 aa）
Chain D 255–461（207 aa）
Not recorded MAN alpha-D-mannopyranose × 6 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 MG MAGNESIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；0.05 M Na-acetate pH 5.3, 0.1 M Mg-formate,7% PEG5000 MME
Resolution 3.90 Å R-free 0.265
8Q6R Structure of complement FP in complex with the TPP-3077 VHH Deposited 2023-08-14 Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain C 28–135（108 aa）
Chain D 256–469（214 aa）
Not recorded GCH GLYCOCHOLIC ACID × 2 MAN alpha-D-mannopyranose × 10 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；292 K；95% Morpheus Screen III, condition G1
Resolution 1.90 Å R-free 0.238
8Q6R Structure of complement FP in complex with the TPP-3077 VHH Deposited 2023-08-14 Assembly 2 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain E 28–135（108 aa）
Chain F 256–469（214 aa）
Not recorded MAN alpha-D-mannopyranose × 10 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；292 K；95% Morpheus Screen III, condition G1
Resolution 1.90 Å R-free 0.238
9U62 AP pathways C3 convertase C3bBbP and C3 complex Deposited 2025-03-22 Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain P 1–453（453 aa）
Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 5 NI NICKEL (II) ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 8
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.70 Å

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