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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：P12071 New Search
7PDB entries
10Biological assembly
15chain/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
1H9H COMPLEX OF EETI-II WITH PORCINE TRYPSIN Deposited 2001-03-12 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain I 1–30（30 aa）
Mutation：YES CA CALCIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.7；pH 6.70
Resolution 1.50 Å R-free 0.276
1H9I COMPLEX OF EETI-II MUTANT WITH PORCINE TRYPSIN Deposited 2001-03-12 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain I 1–30（30 aa）
Mutation：YES CA CALCIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6.7；pH 6.70
Resolution 1.90 Å R-free 0.175
1W7Z Crystal structure of the free (uncomplexed) Ecballium elaterium trypsin inhibitor (EETI-II) Deposited 2004-09-14 Assembly 1 Protein homooligomer Homooligomer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain A 1–31（31 aa）
Chain B 1–31（31 aa）
Chain C 1–31（31 aa）
Chain D 1–31（31 aa）
Chain E 1–31（31 aa）
Chain F 1–31（31 aa）
Not recorded NA SODIUM ION × 3 FMT FORMIC ACID × 3 X-RAY DIFFRACTION
X-ray crystallization conditions pH 4.6；2M NA-FORMATE 0.1 M NA-ACETATE PH 4.6
Resolution 1.67 Å R-free 0.235
1W7Z Crystal structure of the free (uncomplexed) Ecballium elaterium trypsin inhibitor (EETI-II) Deposited 2004-09-14 Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain G 1–31（31 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions pH 4.6；2M NA-FORMATE 0.1 M NA-ACETATE PH 4.6
Resolution 1.67 Å R-free 0.235
1W7Z Crystal structure of the free (uncomplexed) Ecballium elaterium trypsin inhibitor (EETI-II) Deposited 2004-09-14 Assembly 3 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain H 1–31（31 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions pH 4.6；2M NA-FORMATE 0.1 M NA-ACETATE PH 4.6
Resolution 1.67 Å R-free 0.235
2C4B Inhibitor cystine knot protein McoEeTI fused to the catalytically inactive barnase mutant H102A Deposited 2005-10-18 Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 16–29（14 aa）
Mutation：YES 2PE NONAETHYLENE GLYCOL × 2 GOL GLYCEROL × 1 EDO 1,2-ETHANEDIOL × 4 FMT FORMIC ACID × 2 SO4 SULFATE ION × 7 UNX UNKNOWN LIGAND × 15 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；277 K；1.3 M AMMONIUM SULPHATE, 7% PEG400 (V/V), 0.1 M MES PH 6.5 AS RESERVOIR SOLUTION. DROPLETS MIXED FROM 8 UL PROTEIN (30 MG/ML) AND 4 UL RESERVOIR. SITTING DROP VAPOR DIFFUSION. 4 DEG. C.
Resolution 1.30 Å R-free 0.164
2C4B Inhibitor cystine knot protein McoEeTI fused to the catalytically inactive barnase mutant H102A Deposited 2005-10-18 Assembly 2 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain B 16–29（14 aa）
Mutation：YES 2PE NONAETHYLENE GLYCOL × 2 EDO 1,2-ETHANEDIOL × 6 FMT FORMIC ACID × 1 SO4 SULFATE ION × 10 MES 2-(N-MORPHOLINO)-ETHANESULFONIC ACID × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；277 K；1.3 M AMMONIUM SULPHATE, 7% PEG400 (V/V), 0.1 M MES PH 6.5 AS RESERVOIR SOLUTION. DROPLETS MIXED FROM 8 UL PROTEIN (30 MG/ML) AND 4 UL RESERVOIR. SITTING DROP VAPOR DIFFUSION. 4 DEG. C.
Resolution 1.30 Å R-free 0.164
2ETI USE OF RESTRAINED MOLECULAR DYNAMICS IN WATER TO DETERMINE THREE-DIMENSIONAL PROTEIN STRUCTURE: PREDICTION OF THE THREE-DIMENSIONAL STRUCTURE OF ECBALLIUM ELATERIUM TRYPSIN INHIBITOR II Deposited 1991-07-15 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–28（28 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR mmCIF provides none of the parsed conditions Resolution not provided
2IT7 Solution structure of the squash trypsin inhibitor EETI-II Deposited 2006-10-19 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–28（28 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 2.7；285 K；Pressure 1
NMR measurement conditions pH 2.7；300 K；Pressure 1
NMR sample composition 4mM EETI-II, 90% H2O, 10% D2O | 90% H2O/10% D2O
NMR sample composition 4mM EETI-II, D2O | D2O
Resolution not provided
2LET AN 1H NMR DETERMINATION OF THE THREE DIMENSIONAL STRUCTURES OF MIRROR IMAGE FORMS OF A LEU-5 VARIANT OF THE TRYPSIN INHIBITOR ECBALLIUM ELATERIUM (EETI-II) Deposited 1994-01-04 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–28（28 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR mmCIF provides none of the parsed conditions Resolution not provided

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.