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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：H4KCU1 New Search
2PDB entries
2Biological assembly
2chain/assembly records
Main Difference Dimensions in This Set
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
6WTI The Cryo-EM structure of the ubiquinol oxidase from Escherichia coli Deposited 2020-05-02 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain A 1–663（663 aa）
Not recorded HEM PROTOPORPHYRIN IX CONTAINING FE × 1 HEO HEME O × 1 CU COPPER (II) ION × 1 UQ8 Ubiquinone-8 × 1 3PE 1,2-Distearoyl-sn-glycerophosphoethanolamine × 9 U9V pentadecyl(tetradecyl)peroxyanhydride × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.38 Å
7N9Z E. coli cytochrome bo3 in MSP nanodisc Deposited 2021-06-19 Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric（4） Consistent with protein count
Chain F 1–663（663 aa）
Not recorded UQ8 Ubiquinone-8 × 1 LHG 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE × 9 3PE 1,2-Distearoyl-sn-glycerophosphoethanolamine × 2 HEO HEME O × 1 HEM PROTOPORPHYRIN IX CONTAINING FE × 1 CDL CARDIOLIPIN × 1 CU COPPER (II) ION × 1 ZN ZINC ION × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.19 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.