6E41

CRYSTAL STRUCTURE OF HUMAN INDOLEAMINE 2,3-DIOXYGENASE 1 (IDO1) in complex with ferric heme and an Epacadostat analog


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.29 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.205 

wwPDB Validation 3D Report Full Report



Literature

High-resolution structures of inhibitor complexes of human indoleamine 2,3-dioxygenase 1 in a new crystal form.

Luo, S.Xu, K.Xiang, S.Chen, J.Chen, C.Guo, C.Tong, Y.Tong, L.

(2018) Acta Crystallogr F Struct Biol Commun 74: 717-724

  • DOI: 10.1107/S2053230X18012955
  • Primary Citation of Related Structures:  
    6E46, 6E45, 6E40, 6E42, 6E41, 6E44, 6E43

  • PubMed Abstract: 
  • Human indoleamine 2,3-dioxygenase 1 (IDO1) is a heme-dependent enzyme with important roles in many cellular processes and is a potential target for drug discovery against cancer and other diseases. Crystal structures of IDO1 in complex with various inhibitors have been reported ...

    Human indoleamine 2,3-dioxygenase 1 (IDO1) is a heme-dependent enzyme with important roles in many cellular processes and is a potential target for drug discovery against cancer and other diseases. Crystal structures of IDO1 in complex with various inhibitors have been reported. Many of these crystals belong to the same crystal form and most of the reported structures have resolutions in the range 3.2-2.3 Å. Here, three new crystal forms of human IDO1 obtained by introducing a surface mutation, K116A/K117A, distant from the active site are reported. One of these crystal forms diffracted to 1.5 Å resolution and can be readily used for soaking experiments to determine high-resolution structures of IDO1 in complex with the substrate tryptophan or inhibitors that coordinate the heme. In addition, this mutant was used to produce crystals of a complex with an inhibitor that targets the apo form of the enzyme under the same conditions; the structure of this complex was determined at 1.7 Å resolution. Overall, this mutant represents a robust platform for determining the structures of inhibitor and substrate complexes of IDO1 at high resolution.


    Organizational Affiliation

    Department of Biological Sciences, Columbia University, New York, NY 10027, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Indoleamine 2,3-dioxygenase 1A, B, C, D405Homo sapiensMutation(s): 2 
Gene Names: IDO1IDOINDO
EC: 1.13.11.52
Find proteins for P14902 (Homo sapiens)
Explore P14902 
Go to UniProtKB:  P14902
NIH Common Fund Data Resources
PHAROS  P14902
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download CCD File 
A, B, C, D
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
HQS
Query on HQS

Download CCD File 
A, B, C, D
N-(3-bromo-4-fluorophenyl)-N'-hydroxy-4-{[2-(sulfamoylamino)ethyl]sulfanyl}-1,2,5-oxadiazole-3-carboximidamide
C11 H12 Br F N6 O4 S2
WSIGGURFGMNQNZ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.29 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.205 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.916α = 90
b = 201.722β = 90
c = 114.893γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
PHENIXphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2018-07-16 
  • Released Date: 2018-11-14 
  • Deposition Author(s): Luo, S., Tong, L.

Revision History 

  • Version 1.0: 2018-11-14
    Type: Initial release