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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：P21889 New Search
3PDB entries
4Biological assembly
6chain/assembly records
Main Difference Dimensions in This Set
Different construct 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
1C0A CRYSTAL STRUCTURE OF THE E. COLI ASPARTYL-TRNA SYNTHETASE : TRNAASP : ASPARTYL-ADENYLATE COMPLEX Deposited 1999-07-15 Assembly 1 Protein–RNA Monomer；Protein × 1 PDB declaration: dimeric（2） Consistent with all polymers
Chain A 1–585（585 aa）
Not recorded SO4 SULFATE ION × 1 AMP ADENOSINE MONOPHOSPHATE × 1 AMO ASPARTYL-ADENOSINE-5'-MONOPHOSPHATE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.8；277 K；AMMONIUM SULFATE, GLYCEROL, BIS-TRIS-PROPANE, pH 6.8, VAPOR DIFFUSION, HANGING DROP, temperature 277K
Resolution 2.40 Å R-free 0.249
1EQR CRYSTAL STRUCTURE OF FREE ASPARTYL-TRNA SYNTHETASE FROM ESCHERICHIA COLI Deposited 2000-04-06 Assembly 1 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 1–590（590 aa）
Chain B 1–590（590 aa）
Chain C 1–590（590 aa）
Not recorded MG MAGNESIUM ION × 4 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；277 K；ammonium sulphate, Bis Tris propane, isopropanol, NaCl, pH 7, VAPOR DIFFUSION, HANGING DROP, temperature 277K
Resolution 2.70 Å R-free 0.269
1IL2 Crystal Structure of the E. coli Aspartyl-tRNA Synthetase:Yeast tRNAasp:aspartyl-Adenylate Complex Deposited 2001-05-07 Assembly 1 Protein–RNA Monomer；Protein × 1 PDB declaration: dimeric（2） Consistent with all polymers
Chain A 1–590（590 aa）
Not recorded SO4 SULFATE ION × 1 AMO ASPARTYL-ADENOSINE-5'-MONOPHOSPHATE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.7；277 K；ammonium sulfate, pH 6.7, VAPOR DIFFUSION, HANGING DROP, temperature 277.0K
Resolution 2.60 Å R-free 0.257
1IL2 Crystal Structure of the E. coli Aspartyl-tRNA Synthetase:Yeast tRNAasp:aspartyl-Adenylate Complex Deposited 2001-05-07 Assembly 2 Protein–RNA Monomer；Protein × 1 PDB declaration: dimeric（2） Consistent with all polymers
Chain B 1–590（590 aa）
Not recorded SO4 SULFATE ION × 1 AMO ASPARTYL-ADENOSINE-5'-MONOPHOSPHATE × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.7；277 K；ammonium sulfate, pH 6.7, VAPOR DIFFUSION, HANGING DROP, temperature 277.0K
Resolution 2.60 Å R-free 0.257

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.