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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：P28905 New Search
3PDB entries
4Biological assembly
4chain/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
1EM8 Crystal structure of chi and psi subunit heterodimer from DNA POL III Deposited 2000-03-16 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain A 1–147（147 aa） Fragment：RESIDUES 1-147
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.8；277 K；methylpentanediol, HEPES, PEG 4000, Glycerol, pH 6.8, VAPOR DIFFUSION, HANGING DROP, temperature 277K
Resolution 2.10 Å R-free 0.265
1EM8 Crystal structure of chi and psi subunit heterodimer from DNA POL III Deposited 2000-03-16 Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain C 1–147（147 aa） Fragment：RESIDUES 1-147
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.8；277 K；methylpentanediol, HEPES, PEG 4000, Glycerol, pH 6.8, VAPOR DIFFUSION, HANGING DROP, temperature 277K
Resolution 2.10 Å R-free 0.265
3SXU Structure of the E. coli SSB-DNA polymerase III interface Deposited 2011-07-15 Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 1–147（147 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.6；298 K；25% PEG 4000, 0.2 M ammonium sulfate, 0.1 M sodium acetate, pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Resolution 1.85 Å R-free 0.208
9OYH Structure of the E. coli clamp loader DnaX-complex loading beta-clamp onto 10-nt gapped DNA in state 1 the DNA recognition state Deposited 2025-06-04 Assembly 1 Protein–DNA Heteromer；Protein × 9 PDB declaration: 11-meric（11） Consistent with all polymers
Chain L 2–147（146 aa）
Not recorded ZN ZINC ION × 4 AGS PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER × 3 MG MAGNESIUM ION × 3 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.54 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.