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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：P00777 New Search
28PDB entries
31Biological assembly
32chain/assembly records
Main Difference Dimensions in This Set
Different mutation/modification Different assembly state Different ligand/ion 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
1CSO CRYSTAL STRUCTURE OF THE OMTKY3 P1 VARIANT OMTKY3-ILE18I IN COMPLEX WITH SGPB Deposited 1999-08-18 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.8；298 K；PEG 4000 sodium potassium phosphate, pH 6.8, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 1.90 Å
1CT0 CRYSTAL STRUCTURE OF THE OMTKY3 P1 VARIANT OMTKY3-SER18I IN COMPLEX WITH SGPB Deposited 1999-08-18 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.4；298 K；PEG 4000 sodium potassium phosphate, pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 298.0K
Resolution 1.80 Å
1CT2 CRYSTAL STRUCTURE OF THE OMTKY3 P1 VARIANT OMTKY3-THR18I IN COMPLEX WITH SGPB Deposited 1999-08-18 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.4；298 K；PEG 4000 sodium potassium phosphate , pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 1.65 Å
1CT4 CRYSTAL STRUCTURE OF THE OMTKY3 P1 VARIANT OMTKY3-VAL18I IN COMPLEX WITH SGPB Deposited 1999-08-18 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.1；298 K；PEG 4000 sodium potassium phosphate, pH 7.1, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 1.60 Å
1DS2 CRYSTAL STRUCTURE OF SGPB:OMTKY3-COO-LEU18I Deposited 2000-01-06 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.1；298 K；PEG 4000, sodium potassium phosphate, pH 7.1, VAPOR DIFFUSION, HANGING DROP, temperature 298.0K
Resolution 1.70 Å
1SGD ASP 18 VARIANT OF TURKEY OVOMUCOID INHIBITOR THIRD DOMAIN COMPLEXED WITH STREPTOMYCES GRISEUS PROTEINASE B AT PH 6.5 Deposited 1999-03-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded PO4 PHOSPHATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.5；0.4M SODIUM/POTASSIUM PHOSPHATE BUFFER AT PH 6.5
Resolution 1.80 Å
1SGE GLU 18 VARIANT OF TURKEY OVOMUCOID INHIBITOR THIRD DOMAIN COMPLEXED WITH STREPTOMYCES GRISEUS PROTEINASE B AT PH 6.5 Deposited 1999-03-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded PO4 PHOSPHATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.5；0.4 M SODIUM/POTASSIUM PHOSPHATE buffer AT PH 6.5
Resolution 1.80 Å
1SGN ASN 18 VARIANT OF TURKEY OVOMUCOID INHIBITOR THIRD DOMAIN COMPLEXED WITH STREPTOMYCES GRISEUS PROTEINASE B Deposited 1999-03-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded PO4 PHOSPHATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.5；2% PEG 6000, 50MM SODIUM/POTASSIUM PHOSPHATE BUFFER AT PH 6.5, pH 6.50
Resolution 1.80 Å
1SGP ALA 18 VARIANT OF TURKEY OVOMUCOID INHIBITOR THIRD DOMAIN COMPLEXED WITH STREPTOMYCES GRISEUS PROTEINASE B Deposited 1995-05-26 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded PO4 PHOSPHATE ION × 1 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 1.40 Å
1SGQ GLY 18 VARIANT OF TURKEY OVOMUCOID INHIBITOR THIRD DOMAIN COMPLEXED WITH STREPTOMYCES GRISEUS PROTEINASE B Deposited 1995-05-26 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded PO4 PHOSPHATE ION × 1 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 1.90 Å
1SGR LEU 18 VARIANT OF TURKEY OVOMUCOID INHIBITOR THIRD DOMAIN COMPLEXED WITH STREPTOMYCES GRISEUS PROTEINASE B Deposited 1995-05-26 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded PO4 PHOSPHATE ION × 1 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 1.80 Å
1SGY TYR 18 VARIANT OF TURKEY OVOMUCOID INHIBITOR THIRD DOMAIN COMPLEXED WITH STREPTOMYCES GRISEUS PROTEINASE B AT PH 6.5 Deposited 1999-03-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded PO4 PHOSPHATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.5；0.4 M SODIUM/POTASSIUM PHOSPHATE buffer AT PH 6.5
Resolution 1.80 Å
2GKV Crystal structure of the SGPB:P14'-Ala32 OMTKY3-del(1-5) complex Deposited 2006-04-03 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；298 K；0.2M Na acetate trihydrate, 0.1M Tris-HCl pH 8.5, 26% w/v PEG 4000, VAPOR DIFFUSION, HANGING DROP, temperature 298.0K
Resolution 1.70 Å R-free 0.248
2NU0 Molecular structures of the complexes of SGPB with OMTKY3 aromatic P1 variants Trp18I, His18I, Phe18I, and Tyr18I Deposited 2006-11-08 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa） Fragment：residues 115-299
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.1；298 K；PEG 4000, SODIUM POTASSIUM PHOSPHATE, pH 7.1, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 1.95 Å
2NU1 Molecular structures of the complexes of SGPB with OMTKY3 aromatic P1 variants Trp18I, His18I, Phe18I and Tyr18I Deposited 2006-11-08 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa） Fragment：residues 115-299
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.1；298 K；PEG 4000, SODIUM POTASSIUM PHOSPHATE, pH 7.1, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 1.80 Å
2NU2 Accommodation of positively-charged residues in a hydrophobic specificity pocket: Crystal structures of SGPB in complex with OMTKY3 variants Lys18I and Arg18I Deposited 2006-11-08 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa） Fragment：residues 115-299
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.1；298 K；PEG 4000, SODIUM POTASSIUM PHOSPHATE, pH 7.1, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 1.65 Å
2NU3 Accommodation of positively-charged residues in a hydrophobic specificity pocket: Crystal structures of SGPB in complex with OMTKY3 variants Lys18I and Arg18I Deposited 2006-11-08 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa） Fragment：residues 115-299
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.1；298 K；PEG 4000, SODIUM POTASSIUM PHOSPHATE, pH 7.1, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 1.80 Å
2NU4 Accommodation of positively-charged residues in a hydrophobic specificity pocket: Crystal structures of SGPB in complex with OMTKY3 variants Lys18I and Arg18I Deposited 2006-11-08 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa） Fragment：residues 115-299
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；298 K；PEG 4000, SODIUM POTASSIUM PHOSPHATE at pH 7.1 24h before data collection, crystal was transferred to PEG4000, NaKHPO4 at pH 10.7, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 1.75 Å
2QA9 Crystal structure of the second tetrahedral intermediates of SGPB at pH 4.2 Deposited 2007-06-14 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded CL CHLORIDE ION × 4 SO4 SULFATE ION × 4 EDO 1,2-ETHANEDIOL × 8 GOL GLYCEROL × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.2；298 K；10 mg/mL SGPB in 10 mM MgCl2 0.7 M KH2PO4 pH 4.2, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 1.18 Å R-free 0.182
2QA9 Crystal structure of the second tetrahedral intermediates of SGPB at pH 4.2 Deposited 2007-06-14 Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded CL CHLORIDE ION × 2 SO4 SULFATE ION × 2 EDO 1,2-ETHANEDIOL × 4 GOL GLYCEROL × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.2；298 K；10 mg/mL SGPB in 10 mM MgCl2 0.7 M KH2PO4 pH 4.2, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 1.18 Å R-free 0.182
2QAA Crystal structure of the second tetrahedral intermediates of SGPB at pH 7.3 Deposited 2007-06-14 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 115–299（185 aa）
Not recorded SO4 SULFATE ION × 2 CL CHLORIDE ION × 4 TYR TYROSINE × 1 LEU LEUCINE × 1 EDO 1,2-ETHANEDIOL × 3 EPE 4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID × 1 GOL GLYCEROL × 1 ACY ACETIC ACID × 2 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.3；298 K；10 mg/mL SGPB in 10 mM MgCl2 1.0 M Li2SO4, 0.1 M HEPES-NaOH pH 7.3, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 1.23 Å R-free 0.127
2QAA Crystal structure of the second tetrahedral intermediates of SGPB at pH 7.3 Deposited 2007-06-14 Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain B 115–299（185 aa）
Not recorded SO4 SULFATE ION × 3 CL CHLORIDE ION × 6 TYR TYROSINE × 1 LEU LEUCINE × 1 EDO 1,2-ETHANEDIOL × 1 GOL GLYCEROL × 3 ACY ACETIC ACID × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.3；298 K；10 mg/mL SGPB in 10 mM MgCl2 1.0 M Li2SO4, 0.1 M HEPES-NaOH pH 7.3, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 1.23 Å R-free 0.127
2QAA Crystal structure of the second tetrahedral intermediates of SGPB at pH 7.3 Deposited 2007-06-14 Assembly 3 Protein homooligomer Homooligomer；Protein × 24 PDB declaration: 24-meric（24） Consistent with protein count
Chain A 115–299（185 aa）
Chain B 115–299（185 aa）
Not recorded SO4 SULFATE ION × 60 CL CHLORIDE ION × 120 TYR TYROSINE × 24 LEU LEUCINE × 24 EDO 1,2-ETHANEDIOL × 48 EPE 4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID × 12 GOL GLYCEROL × 48 ACY ACETIC ACID × 36 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.3；298 K；10 mg/mL SGPB in 10 mM MgCl2 1.0 M Li2SO4, 0.1 M HEPES-NaOH pH 7.3, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 1.23 Å R-free 0.127
2SGD ASP 18 VARIANT OF TURKEY OVOMUCOID INHIBITOR THIRD DOMAIN COMPLEXED WITH STREPTOMYCES GRISEUS PROTEINASE B AT PH 10.7 Deposited 1999-03-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded PO4 PHOSPHATE ION × 1 K POTASSIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 10.7；0.4M SODIUM/POTASSIUM PHOSPHATE BUFFER AT PH 10.7
Resolution 1.80 Å
2SGE GLU 18 VARIANT OF TURKEY OVOMUCOID INHIBITOR THIRD DOMAIN COMPLEXED WITH STREPTOMYCES GRISEUS PROTEINASE B AT PH 10.7 Deposited 1999-03-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded PO4 PHOSPHATE ION × 1 K POTASSIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 10.7；0.4M SODIUM/POTASSIUM PHOSPHATE BUFFER AT PH 10.7
Resolution 1.80 Å
2SGF PHE 18 VARIANT OF TURKEY OVOMUCOID INHIBITOR THIRD DOMAIN COMPLEXED WITH STREPTOMYCES GRISEUS PROTEINASE B Deposited 1999-03-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded PO4 PHOSPHATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.5；0.4 M SODIUM/POTASSIUM PHOSPHATE AT PH 6.5
Resolution 1.75 Å
2SGP PRO 18 VARIANT OF TURKEY OVOMUCOID INHIBITOR THIRD DOMAIN COMPLEXED WITH STREPTOMYCES GRISEUS PROTEINASE B AT PH 6.5 Deposited 1999-03-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded PO4 PHOSPHATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.5；0.4 M SODIUM/POTASSIUM PHOSPHATE BUFFER AT PH 6.5, pH 6.50
Resolution 1.80 Å
2SGQ GLN 18 VARIANT OF TURKEY OVOMUCOID INHIBITOR THIRD DOMAIN COMPLEXED WITH STREPTOMYCES GRISEUS PROTEINASE B AT PH 6.5 Deposited 1999-03-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded PO4 PHOSPHATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.5；0.4 M SODIUM/POTASSIUM PHOSPHATE buffer AT PH 6.5
Resolution 1.80 Å
3SGB STRUCTURE OF THE COMPLEX OF STREPTOMYCES GRISEUS PROTEASE B AND THE THIRD DOMAIN OF THE TURKEY OVOMUCOID INHIBITOR AT 1.8 ANGSTROMS RESOLUTION Deposited 1983-01-21 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 1.80 Å
3SGQ GLN 18 VARIANT OF TURKEY OVOMUCOID INHIBITOR THIRD DOMAIN COMPLEXED WITH STREPTOMYCES GRISEUS PROTEINASE B AT PH 10.7 Deposited 1999-03-25 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded PO4 PHOSPHATE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 10.7；0.4 M SODIUM/POTASSIUM PHOSPHATE buffer AT PH 10.7
Resolution 1.80 Å
4SGB STRUCTURE OF THE COMPLEX OF STREPTOMYCES GRISEUS PROTEINASE B AND POLYPEPTIDE CHYMOTRYPSIN INHIBITOR-1 FROM RUSSET BURBANK POTATO TUBERS AT 2.1 ANGSTROMS RESOLUTION Deposited 1989-09-21 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain E 115–299（185 aa）
Not recorded SO4 SULFATE ION × 2 CA CALCIUM ION × 1 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.10 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.