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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：P15731 New Search
6PDB entries
6Biological assembly
7chain/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
1QCQ UBIQUITIN CONJUGATING ENZYME Deposited 1999-05-10 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 1–148（148 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.8；PEG 8000, MAGNESIUM ACETATE, CACODYLATE, pH 5.8, VAPOR DIFFUSION, HANGING DROP
Resolution 2.70 Å R-free 0.296
5AIE Not4 ring domain in complex with Ubc4 Deposited 2015-02-12 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 1–148（148 aa）
Not recorded ZN ZINC ION × 2 X-RAY DIFFRACTION
X-ray crystallization conditions pH 8.5；10% (W/V) PEG 8000, 0.02 M OF L-NA-GLUTAMATE, 0.02 M OF ALANINE (RACEMIC), 0.02 M OF GLYCINE, 0.02 M OF LYSINE HCL (RACEMIC), 0.02 M OF SERINE (RACEMIC), 0.1 M BICINE PH 8.5 AND 20% (W/V) ETHYLENE GLYCOL AS CRYSTALLIZATION BUFFER AT ROOM TEMPERATURE.
Resolution 2.80 Å R-free 0.271
8J1R cryo-EM structures of Ufd4 in complex with Ubc4-Ub Deposited 2023-04-13 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain C 1–148（148 aa）
Mutation：C22S,C108S No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.52 Å
9KHS Cryo-EM structure of Ufd2/Ubc4-Ub in complex with K29-linked diUb (monomeric conformation) Deposited 2024-11-11 Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain B 1–148（148 aa）
Mutation：C22S/C102S No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.31 Å
9KHT cryo-EM structure of Ufd2/Ubc4-Ub in complex with K29-linked triUb (dimeric conformation) Deposited 2024-11-11 Assembly 1 Protein heterocomplex Heteromer；Protein × 12 PDB declaration: 12-meric（12） Consistent with protein count
Chain B 1–148（148 aa）
Chain b 1–148（148 aa）
Mutation：C22S/C108S Mutation：C22S/C108S No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.85 Å
9M7O Cryo-EM structure of Ufd2/Ubc4-ub complex with K29triUb(monomeric conformation) Deposited 2025-03-10 Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric（5） Consistent with protein count
Chain B 1–148（148 aa）
Mutation：C22S/C102S No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.14 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.