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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：P01040 New Search
14PDB entries
25Biological assembly
27chain/assembly records
Main Difference Dimensions in This Set
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
1CYU SOLUTION NMR STRUCTURE OF RECOMBINANT HUMAN CYSTATIN A UNDER THE CONDITION OF PH 3.8 AND 310K Deposited 1995-08-24 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–98（98 aa）
Mutation：DEL(M1), M65L No recorded non-water small molecule SOLUTION NMR mmCIF provides none of the parsed conditions Resolution not provided
1CYV SOLUTION NMR STRUCTURE OF RECOMBINANT HUMAN CYSTATIN A UNDER THE CONDITION OF PH 3.8 AND 310K Deposited 1995-08-24 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–98（98 aa）
Mutation：DEL(M1), M65L No recorded non-water small molecule SOLUTION NMR mmCIF provides none of the parsed conditions Resolution not provided
1DVC SOLUTION NMR STRUCTURE OF HUMAN STEFIN A AT PH 5.5 AND 308K, NMR, MINIMIZED AVERAGE STRUCTURE Deposited 1996-02-26 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–98（98 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 5.5；308 K
Resolution not provided
1DVD SOLUTION NMR STRUCTURE OF HUMAN STEFIN A AT PH 5.5 AND 308K, NMR, 17 STRUCTURES Deposited 1996-02-26 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–98（98 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 5.5；308 K
Resolution not provided
1GD3 refined solution structure of human cystatin A Deposited 2000-09-08 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–98（98 aa）
Mutation：M65L No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 4；310 K；Ionic strength (raw mmCIF value) 0；Pressure ambient
NMR sample composition 1.4mM cystatin A U-15N,13C; 10mM Acetate buffer NA; 95% H2O, 5% D2O | 95% H2O/5% D2O
NMR sample composition 1.4mM cystatin A U-15N; 10mM Acetate buffer NA; 95% H2O, 5% D2O | 95% H2O/5% D2O
NMR sample composition 1.4mM cystatin A; 10mM Acetate buffer NA; 98% D2O | 98% D2O
Resolution not provided
1GD4 SOLUTION STRUCTURE OF P25S CYSTATIN A Deposited 2000-09-08 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–98（98 aa）
Mutation：M65L,P25S No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 4；310 K；Ionic strength (raw mmCIF value) 0；Pressure ambient
NMR sample composition 1.4mM P25S cystatin A U-15N,13C; 10mM Acetate buffer ; 95% H2O, 5% D2O | 95% H2O/5% D2O
NMR sample composition 1.4mM P25S cystatin A U-15N; 10mM Acetate buffer ; 90% H2O 10% D2O | 95% H2O/5% D2O
NMR sample composition 1.4mM P25S cystatin A; 10mM Acetate buffer ; 98% D2O | 98% D2O
Resolution not provided
1N9J Solution Structure of the 3D domain swapped dimer of Stefin A Deposited 2002-11-25 Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–98（98 aa）
Chain B 1–98（98 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 5.5；308 K；Pressure ambient
NMR sample composition 1.2mM Stefin A U-15N; 50mM phosphate buffer pH 5.5, 100mM KCl, 5mM Azide; 90% H2O, 10% D2O | 90% H2O/10% D2O
NMR sample composition 1mM Stefin A U-15N,13C,2H; 50mM phosphate buffer pH 5.5, 100mM KCl, 5mM Azide; 90% H2O, 10% D2O | 90% H2O/10% D2O
Resolution not provided
1NB3 Crystal structure of stefin A in complex with cathepsin H: N-terminal residues of inhibitors can adapt to the active sites of endo-and exopeptidases Deposited 2002-12-02 Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain I 1–98（98 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.80 Å R-free 0.246
1NB3 Crystal structure of stefin A in complex with cathepsin H: N-terminal residues of inhibitors can adapt to the active sites of endo-and exopeptidases Deposited 2002-12-02 Assembly 2 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain J 1–98（98 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.80 Å R-free 0.246
1NB3 Crystal structure of stefin A in complex with cathepsin H: N-terminal residues of inhibitors can adapt to the active sites of endo-and exopeptidases Deposited 2002-12-02 Assembly 3 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain K 1–98（98 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.80 Å R-free 0.246
1NB3 Crystal structure of stefin A in complex with cathepsin H: N-terminal residues of inhibitors can adapt to the active sites of endo-and exopeptidases Deposited 2002-12-02 Assembly 4 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain L 1–98（98 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.80 Å R-free 0.246
1NB5 Crystal structure of stefin A in complex with cathepsin H Deposited 2002-12-02 Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain I 1–98（98 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.2；298 K；PEG 4000, ammonium sulphate, sodium acetate, cadmium chloride, pH 4.2, VAPOR DIFFUSION, SITTING DROP, temperature 298K
Resolution 2.40 Å R-free 0.274
1NB5 Crystal structure of stefin A in complex with cathepsin H Deposited 2002-12-02 Assembly 2 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain J 1–98（98 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.2；298 K；PEG 4000, ammonium sulphate, sodium acetate, cadmium chloride, pH 4.2, VAPOR DIFFUSION, SITTING DROP, temperature 298K
Resolution 2.40 Å R-free 0.274
1NB5 Crystal structure of stefin A in complex with cathepsin H Deposited 2002-12-02 Assembly 3 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain K 1–98（98 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.2；298 K；PEG 4000, ammonium sulphate, sodium acetate, cadmium chloride, pH 4.2, VAPOR DIFFUSION, SITTING DROP, temperature 298K
Resolution 2.40 Å R-free 0.274
1NB5 Crystal structure of stefin A in complex with cathepsin H Deposited 2002-12-02 Assembly 4 Other combination Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain L 1–98（98 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.2；298 K；PEG 4000, ammonium sulphate, sodium acetate, cadmium chloride, pH 4.2, VAPOR DIFFUSION, SITTING DROP, temperature 298K
Resolution 2.40 Å R-free 0.274
3K9M Cathepsin B in complex with stefin A Deposited 2009-10-16 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain C 1–98（98 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；0.2M ammonium suphate, 24% PEG3350, VAPOR DIFFUSION, HANGING DROP, temperature 293K
Resolution 2.61 Å R-free 0.250
3K9M Cathepsin B in complex with stefin A Deposited 2009-10-16 Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain D 1–98（98 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；0.2M ammonium suphate, 24% PEG3350, VAPOR DIFFUSION, HANGING DROP, temperature 293K
Resolution 2.61 Å R-free 0.250
3KFQ Unreduced cathepsin V in complex with stefin A Deposited 2009-10-27 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain D 1–98（98 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8；293 K；0.1M Tris-HCl, 12% PEG3000, pH 8.0, VAPOR DIFFUSION, SITTING DROP, temperature 293K
Resolution 1.99 Å R-free 0.219
3KFQ Unreduced cathepsin V in complex with stefin A Deposited 2009-10-27 Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain C 1–98（98 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8；293 K；0.1M Tris-HCl, 12% PEG3000, pH 8.0, VAPOR DIFFUSION, SITTING DROP, temperature 293K
Resolution 1.99 Å R-free 0.219
3KSE Unreduced cathepsin L in complex with stefin A Deposited 2009-11-22 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain D 1–98（98 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；293 K；0.1M Tris-HCl, 16% PEG3000, pH 7.0, VAPOR DIFFUSION, SITTING DROP, temperature 293K
Resolution 1.71 Å R-free 0.204
3KSE Unreduced cathepsin L in complex with stefin A Deposited 2009-11-22 Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 1–98（98 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；293 K；0.1M Tris-HCl, 16% PEG3000, pH 7.0, VAPOR DIFFUSION, SITTING DROP, temperature 293K
Resolution 1.71 Å R-free 0.204
3KSE Unreduced cathepsin L in complex with stefin A Deposited 2009-11-22 Assembly 3 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain F 1–98（98 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；293 K；0.1M Tris-HCl, 16% PEG3000, pH 7.0, VAPOR DIFFUSION, SITTING DROP, temperature 293K
Resolution 1.71 Å R-free 0.204
8GT0 Structure of falcipain and human Stefin A complex Deposited 2022-09-07 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1–98（98 aa）
Not recorded GOL GLYCEROL × 38 NA SODIUM ION × 10 PEG DI(HYDROXYETHYL)ETHER × 9 PE8 3,6,9,12,15,18,21-HEPTAOXATRICOSANE-1,23-DIOL × 8 EDO 1,2-ETHANEDIOL × 7 PG4 TETRAETHYLENE GLYCOL × 16 SO4 SULFATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；290 K；0.05 M cadmium chloride, 0.1 M Na HEPES pH 7.5, 1.0 M sodium acetate and 5 mM MgSO4
Resolution 3.28 Å R-free 0.299
8GT0 Structure of falcipain and human Stefin A complex Deposited 2022-09-07 Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain D 1–98（98 aa）
Not recorded GOL GLYCEROL × 23 NA SODIUM ION × 13 PEG DI(HYDROXYETHYL)ETHER × 11 PE8 3,6,9,12,15,18,21-HEPTAOXATRICOSANE-1,23-DIOL × 2 EDO 1,2-ETHANEDIOL × 4 PG4 TETRAETHYLENE GLYCOL × 14 SO4 SULFATE ION × 5 CL CHLORIDE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；290 K；0.05 M cadmium chloride, 0.1 M Na HEPES pH 7.5, 1.0 M sodium acetate and 5 mM MgSO4
Resolution 3.28 Å R-free 0.299
8GT7 Structure of falcipain and human Stefin A mutant complex Deposited 2022-09-07 Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain B 1–98（98 aa）
Chain D 1–98（98 aa）
Mutation：K68R Mutation：K68R GOL GLYCEROL × 65 NA SODIUM ION × 44 PG4 TETRAETHYLENE GLYCOL × 48 SO4 SULFATE ION × 5 PEG DI(HYDROXYETHYL)ETHER × 54 PE8 3,6,9,12,15,18,21-HEPTAOXATRICOSANE-1,23-DIOL × 12 EDO 1,2-ETHANEDIOL × 8 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；290 K；0.05 M cadmium chloride, 0.1 M Na HEPES pH 7.5 and 1.5 M sodium acetate
Resolution 3.28 Å R-free 0.300

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.