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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：Q3ZCK9 New Search
6PDB entries
6Biological assembly
12chain/assembly records
Main Difference Dimensions in This Set
Different assembly state 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
7DR6 PA28alpha-beta in complex with immunoproteasome Deposited 2020-12-26 Assembly 1 Protein heterocomplex Heteromer；Protein × 35 PDB declaration: 35-meric（35） Consistent with protein count
Chain N 1–261（261 aa）
Chain g 1–261（261 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.10 Å
7DR7 bovine 20S immunoproteasome Deposited 2020-12-26 Assembly 1 Protein heterocomplex Heteromer；Protein × 28 PDB declaration: 28-meric（28） Consistent with protein count
Chain G 1–261（261 aa）
Chain N 1–261（261 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.30 Å
7DRW Bovine 20S immunoproteasome in complex with two human PA28alpha-beta activators Deposited 2020-12-29 Assembly 1 Protein heterocomplex Heteromer；Protein × 42 PDB declaration: 42-meric（42） Consistent with protein count
Chain C 1–261（261 aa）
Chain j 1–261（261 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.4
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 4.20 Å
8AZK Bovine 20S proteasome, untreated Deposited 2022-09-06 Assembly 1 Protein heterocomplex Heteromer；Protein × 28 PDB declaration: 28-meric（28） Consistent with protein count
Chain C 1–261（261 aa）
Chain Q 1–261（261 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 3.10 Å
8FZ5 The PI31-free Bovine 20S proteasome Deposited 2023-01-27 Assembly 1 Protein heterocomplex Heteromer；Protein × 28 PDB declaration: 28-meric（28） Consistent with protein count
Chain C 1–261（261 aa）
Chain Q 1–261（261 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；20 mM Tris, pH 7.5, 5 mM MgCl2, 100 mM KCl, 1mM DTT
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 2.23 Å
8FZ6 The human PI31 complexed with bovine 20S proteasome Deposited 2023-01-27 Assembly 1 Protein heterocomplex Heteromer；Protein × 30 PDB declaration: 30-meric（30） Consistent with protein count
Chain C 1–261（261 aa）
Chain Q 1–261（261 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.5；20 mM Tris, pH 7.5, 5 mM MgCl2, 100 mM KCl, 1mM DTT
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.