← Back to search

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：Q6ZQW0 New Search
11PDB entries
11Biological assembly
11chain/assembly records
Main Difference Dimensions in This Set
Different mutation/modification 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
21OK Crystal structure of the indoleamine 2,3-dioxygenagse 2 (IDO2) H143Y mutant complexed with 5-methoxy-L-Trp Deposited 2025-12-22 Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 10–407（398 aa）
Mutation：H143Y A1A2Y 5-methoxy-L-tryptophan × 1 EDO 1,2-ETHANEDIOL × 7 HEM PROTOPORPHYRIN IX CONTAINING FE × 1 CYN CYANIDE ION × 1 NA SODIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.5；277 K；PEG 3350, Sodium citrate tribasic dihydrate
Resolution 2.60 Å R-free 0.315
21OM Crystal structure of the indoleamine 2,3-dioxygenagse 2 (IDO2) complexed with 5-hydroxy-L-Trp Deposited 2025-12-22 Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 10–407（398 aa）
Not recorded EDO 1,2-ETHANEDIOL × 2 HEM PROTOPORPHYRIN IX CONTAINING FE × 1 CYN CYANIDE ION × 1 4PQ 5-hydroxy-L-tryptophan × 1 NA SODIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；277 K；PEG 3350, Sodium citrate tribasic dihydrate
Resolution 2.68 Å R-free 0.334
21OO Crystal structure of the indoleamine 2,3-dioxygenagse 2 (IDO2) H143Y mutant complexed with 5-methyl-L-Trp Deposited 2025-12-22 Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 10–407（398 aa）
Mutation：H143Y EDO 1,2-ETHANEDIOL × 3 HEM PROTOPORPHYRIN IX CONTAINING FE × 1 CYN CYANIDE ION × 1 D0Q 5-methyl-L-tryptophan × 1 NA SODIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；277 K；PEG 3350, Sodium citrate tribasic dihydrate
Resolution 2.55 Å R-free 0.228
9UYY Crystal structure of the indoleamine 2,3-dioxygenagse 2 (IDO2) complexed with L-Trp Deposited 2025-05-16 Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 10–407（398 aa）
Not recorded PEG DI(HYDROXYETHYL)ETHER × 1 EDO 1,2-ETHANEDIOL × 5 HEM PROTOPORPHYRIN IX CONTAINING FE × 1 TRP TRYPTOPHAN × 1 CYN CYANIDE ION × 1 NA SODIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.5；277 K；PEG 3350, Sodium citrate tribasic dihydrate
Resolution 2.25 Å R-free 0.300
9UYZ Crystal structure of the indoleamine 2,3-dioxygenagse 2 (IDO2) complexed with 5-HT Deposited 2025-05-16 Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 10–407（398 aa）
Not recorded SRO SEROTONIN × 1 EDO 1,2-ETHANEDIOL × 3 PEG DI(HYDROXYETHYL)ETHER × 2 HEM PROTOPORPHYRIN IX CONTAINING FE × 1 CYN CYANIDE ION × 1 NA SODIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；277 K；PEG 3350, Sodium citrate tribasic dihydrate
Resolution 2.45 Å R-free 0.264
9UZ0 Crystal structure of the indoleamine 2,3-dioxygenagse 2 (IDO2) as resting state Deposited 2025-05-16 Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 10–407（398 aa）
Not recorded EDO 1,2-ETHANEDIOL × 2 CIT CITRIC ACID × 1 HEM PROTOPORPHYRIN IX CONTAINING FE × 1 NA SODIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.5；277 K；PEG 3350, Sodium citrate tribasic dihydrate
Resolution 2.45 Å R-free 0.248
9UZ1 Crystal structure of the indoleamine 2,3-dioxygenagse 2 (IDO2) H143Y mutant complexed with L-Trp Deposited 2025-05-16 Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 10–407（398 aa）
Mutation：H143Y TRP TRYPTOPHAN × 1 PEG DI(HYDROXYETHYL)ETHER × 1 CIT CITRIC ACID × 1 EDO 1,2-ETHANEDIOL × 2 HEM PROTOPORPHYRIN IX CONTAINING FE × 1 CYN CYANIDE ION × 1 NA SODIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.5；277 K；PEG 3350, Sodium citrate tribasic dihydrate
Resolution 2.35 Å R-free 0.236
9UZ2 Crystal structure of the indoleamine 2,3-dioxygenagse 2 (IDO2) complexed with Cyanide ion Deposited 2025-05-16 Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 10–407（398 aa）
Not recorded CIT CITRIC ACID × 1 EDO 1,2-ETHANEDIOL × 2 HEM PROTOPORPHYRIN IX CONTAINING FE × 1 CYN CYANIDE ION × 1 NA SODIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；277 K；PEG 3350, Sodium citrate tribasic dihydrate
Resolution 2.55 Å R-free 0.238
9UZ3 Crystal structure of the indoleamine 2,3-dioxygenagse 2 (IDO2) complexed with D-Trp Deposited 2025-05-16 Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 10–407（398 aa）
Not recorded HEM PROTOPORPHYRIN IX CONTAINING FE × 1 CYN CYANIDE ION × 1 DTR D-TRYPTOPHAN × 1 EDO 1,2-ETHANEDIOL × 4 NA SODIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；277 K；PEG 3350, Sodium citrate tribasic dihydrate
Resolution 2.50 Å R-free 0.275
9UZ4 Crystal structure of the indoleamine 2,3-dioxygenagse 2 (IDO2) complexed with 5-methoxy-L-Trp Deposited 2025-05-16 Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 10–407（398 aa）
Not recorded A1A2Y 5-methoxy-L-tryptophan × 1 EDO 1,2-ETHANEDIOL × 12 HEM PROTOPORPHYRIN IX CONTAINING FE × 1 CYN CYANIDE ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.5；277 K；PEG 3350, Sodium citrate tribasic dihydrate
Resolution 2.50 Å R-free 0.280
9UZ5 Crystal structure of the indoleamine 2,3-dioxygenagse 2 (IDO2) complexed with 5-methyl-L-Trp Deposited 2025-05-16 Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 10–407（398 aa）
Not recorded EDO 1,2-ETHANEDIOL × 5 HEM PROTOPORPHYRIN IX CONTAINING FE × 1 CYN CYANIDE ION × 1 D0Q 5-methyl-L-tryptophan × 1 NA SODIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.5；277 K；PEG 3350, Sodium citrate tribasic dihydrate
Resolution 2.50 Å R-free 0.229

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.