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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：P39099 New Search
6PDB entries
10Biological assembly
87chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification Different assembly state 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
3STI Crystal structure of the protease domain of DegQ from Escherichia coli Deposited 2011-07-11 Assembly 1 Protein homooligomer Homooligomer；Protein × 3 PDB declaration: trimeric（3） Consistent with protein count
Chain A 28–264（237 aa） Fragment：UNP residues 28-264
Chain B 28–264（237 aa） Fragment：UNP residues 28-264
Chain C 28–264（237 aa） Fragment：UNP residues 28-264
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 7；291 K；1.6M Ammonium sulfate, 3% PEG 400, 0.1M Hepes, pH7.0 , VAPOR DIFFUSION, temperature 291K
Resolution 2.60 Å R-free 0.257
3STJ Crystal structure of the protease + PDZ1 domain of DegQ from Escherichia coli Deposited 2011-07-11 Assembly 1 Protein heterocomplex Heteromer；Protein × 7 PDB declaration: heptameric（7） Consistent with protein count
Chain A 28–364（337 aa） Fragment：UNP residues 28-364
Chain B 28–364（337 aa） Fragment：UNP residues 28-364
Chain C 28–364（337 aa） Fragment：UNP residues 28-364
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 5.4；291 K；24% PEG6000, 5% PEG100, 10% glycerol, 0.1M MES pH5.4, VAPOR DIFFUSION, temperature 291K
Resolution 2.60 Å R-free 0.212
3STJ Crystal structure of the protease + PDZ1 domain of DegQ from Escherichia coli Deposited 2011-07-11 Assembly 2 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain D 28–364（337 aa） Fragment：UNP residues 28-364
Chain E 28–364（337 aa） Fragment：UNP residues 28-364
Chain F 28–364（337 aa） Fragment：UNP residues 28-364
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 5.4；291 K；24% PEG6000, 5% PEG100, 10% glycerol, 0.1M MES pH5.4, VAPOR DIFFUSION, temperature 291K
Resolution 2.60 Å R-free 0.212
3STJ Crystal structure of the protease + PDZ1 domain of DegQ from Escherichia coli Deposited 2011-07-11 Assembly 3 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain G 28–364（337 aa） Fragment：UNP residues 28-364
Chain H 28–364（337 aa） Fragment：UNP residues 28-364
Chain I 28–364（337 aa） Fragment：UNP residues 28-364
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 5.4；291 K；24% PEG6000, 5% PEG100, 10% glycerol, 0.1M MES pH5.4, VAPOR DIFFUSION, temperature 291K
Resolution 2.60 Å R-free 0.212
3STJ Crystal structure of the protease + PDZ1 domain of DegQ from Escherichia coli Deposited 2011-07-11 Assembly 4 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric（6） Consistent with protein count
Chain J 28–364（337 aa） Fragment：UNP residues 28-364
Chain K 28–364（337 aa） Fragment：UNP residues 28-364
Chain L 28–364（337 aa） Fragment：UNP residues 28-364
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 5.4；291 K；24% PEG6000, 5% PEG100, 10% glycerol, 0.1M MES pH5.4, VAPOR DIFFUSION, temperature 291K
Resolution 2.60 Å R-free 0.212
3STJ Crystal structure of the protease + PDZ1 domain of DegQ from Escherichia coli Deposited 2011-07-11 Assembly 5 Protein heterocomplex Heteromer；Protein × 25 PDB declaration: 25-meric（25） Consistent with protein count
Chain A 28–364（337 aa） Fragment：UNP residues 28-364
Chain B 28–364（337 aa） Fragment：UNP residues 28-364
Chain C 28–364（337 aa） Fragment：UNP residues 28-364
Chain D 28–364（337 aa） Fragment：UNP residues 28-364
Chain E 28–364（337 aa） Fragment：UNP residues 28-364
Chain F 28–364（337 aa） Fragment：UNP residues 28-364
Chain G 28–364（337 aa） Fragment：UNP residues 28-364
Chain H 28–364（337 aa） Fragment：UNP residues 28-364
Chain I 28–364（337 aa） Fragment：UNP residues 28-364
Chain J 28–364（337 aa） Fragment：UNP residues 28-364
Chain K 28–364（337 aa） Fragment：UNP residues 28-364
Chain L 28–364（337 aa） Fragment：UNP residues 28-364
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION；pH 5.4；291 K；24% PEG6000, 5% PEG100, 10% glycerol, 0.1M MES pH5.4, VAPOR DIFFUSION, temperature 291K
Resolution 2.60 Å R-free 0.212
4A8A Asymmetric cryo-EM reconstruction of E. coli DegQ 12-mer in complex with lysozyme Deposited 2011-11-20 Assembly 1 Protein heterocomplex Heteromer；Protein × 13 PDB declaration: tridecameric（13） Consistent with protein count
Chain A 28–455（428 aa）
Chain B 28–455（428 aa）
Chain C 28–455（428 aa）
Chain D 28–455（428 aa）
Chain E 28–455（428 aa）
Chain F 28–455（428 aa）
Chain G 28–455（428 aa）
Chain H 28–455（428 aa）
Chain I 28–455（428 aa）
Chain J 28–455（428 aa）
Chain K 28–455（428 aa）
Chain L 28–455（428 aa）
Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer 20 MM HEPES/NAOH, 150 MM NACL；pH 7.5；20 MM HEPES/NAOH, 150 MM NACL
cryo-EM vitrification conditions Cryogen ETHANE；VITRIFICATION 1 -- CRYOGEN- ETHANE, INSTRUMENT- MANUAL PLUNGER, METHOD- BLOT FOR 2 SECONDS BEFORE PLUNGING,
Resolution 14.20 Å
4A8B Symmetrized cryo-EM reconstruction of E. coli DegQ 12-mer in complex with lysozymes Deposited 2011-11-20 Assembly 1 Protein heterocomplex Heteromer；Protein × 18 PDB declaration: octadecameric（18） Consistent with protein count
Chain A 28–455（428 aa）
Chain B 28–455（428 aa）
Chain C 28–455（428 aa）
Chain D 28–455（428 aa）
Chain E 28–455（428 aa）
Chain F 28–455（428 aa）
Chain G 28–455（428 aa）
Chain H 28–455（428 aa）
Chain I 28–455（428 aa）
Chain J 28–455（428 aa）
Chain K 28–455（428 aa）
Chain L 28–455（428 aa）
Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer 20 MM HEPES/NAOH, 150 MM NACL；pH 7.5；20 MM HEPES/NAOH, 150 MM NACL
cryo-EM vitrification conditions Cryogen ETHANE；VITRIFICATION 1 -- CRYOGEN- ETHANE, INSTRUMENT- MANUAL PLUNGER, METHOD- BLOT FOR 2 SECONDS BEFORE PLUNGING,
Resolution 13.00 Å
4A8C Symmetrized cryo-EM reconstruction of E. coli DegQ 12-mer in complex with a binding peptide Deposited 2011-11-20 Assembly 1 Protein homooligomer Homooligomer；Protein × 12 PDB declaration: dodecameric（12） Consistent with protein count
Chain A 28–455（428 aa）
Chain B 28–455（428 aa）
Chain C 28–455（428 aa）
Chain D 28–455（428 aa）
Chain E 28–455（428 aa）
Chain F 28–455（428 aa）
Chain G 28–455（428 aa）
Chain H 28–455（428 aa）
Chain I 28–455（428 aa）
Chain J 28–455（428 aa）
Chain K 28–455（428 aa）
Chain L 28–455（428 aa）
Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer 20 MM HEPES/NAOH, 150 MM NACL；pH 7.5；20 MM HEPES/NAOH, 150 MM NACL
cryo-EM vitrification conditions Cryogen ETHANE；VITRIFICATION 1 -- CRYOGEN- ETHANE, INSTRUMENT- MANUAL PLUNGER, METHOD- BLOT FOR 2 SECONDS BEFORE PLUNGING,
Resolution 7.50 Å
4A9G Symmetrized cryo-EM reconstruction of E. coli DegQ 24-mer in complex with beta-casein Deposited 2011-11-26 Assembly 1 Protein homooligomer Homooligomer；Protein × 24 PDB declaration: 24-meric（24） Consistent with protein count
Chain A 28–455（428 aa）
Chain B 28–455（428 aa）
Chain C 28–455（428 aa）
Chain D 28–455（428 aa）
Chain E 28–455（428 aa）
Chain F 28–455（428 aa）
Chain G 28–455（428 aa）
Chain H 28–455（428 aa）
Chain I 28–455（428 aa）
Chain J 28–455（428 aa）
Chain K 28–455（428 aa）
Chain L 28–455（428 aa）
Chain M 28–455（428 aa）
Chain N 28–455（428 aa）
Chain O 28–455（428 aa）
Chain P 28–455（428 aa）
Chain Q 28–455（428 aa）
Chain R 28–455（428 aa）
Chain S 28–455（428 aa）
Chain T 28–455（428 aa）
Chain U 28–455（428 aa）
Chain V 28–455（428 aa）
Chain W 28–455（428 aa）
Chain Y 28–455（428 aa）
Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES Mutation：YES No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer 150MM NACL, 20MM HEPES/NAOH；pH 7.5；150MM NACL, 20MM HEPES/NAOH
cryo-EM vitrification conditions Cryogen ETHANE；LIQUID ETHANE
Resolution 7.50 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.