7P0N

Crystal structure of L-Trp/Indoleamine 2,3-dioxygenagse 1 (hIDO1) complex with the JK-loop refined in the open conformation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.218 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Temporary Intermediates of L-Trp Along the Reaction Pathway of Human Indoleamine 2,3-Dioxygenase 1 and Identification of an Exo Site.

Mirgaux, M.Leherte, L.Wouters, J.

(2021) Int J Tryptophan Res 14: 11786469211052964-11786469211052964

  • DOI: https://doi.org/10.1177/11786469211052964
  • Primary Citation of Related Structures:  
    7NGE, 7P0N, 7P0R

  • PubMed Abstract: 

    Protein dynamics governs most of the fundamental processes in the human body. Particularly, the dynamics of loops located near an active site can be involved in the positioning of the substrate and the reaction mechanism. The understanding of the functioning of dynamic loops is therefore a challenge, and often requires the use of a multi-disciplinary approach mixing, for example, crystallographic experiments and molecular dynamics simulations. In the present work, the dynamic behavior of the JK-loop of the human indoleamine 2,3-dioxygenase 1 hemoprotein, a target for immunotherapy, is investigated. To overcome the lack of knowledge on this dynamism, the study reported here is based on 3 crystal structures presenting different conformations of the loop, completed with molecular dynamics trajectories and MM-GBSA analyses, in order to trace the reaction pathway of the enzyme. In addition, the crystal structures identify an exo site in the small unit of the enzyme, that is populated redundantly by the substrate or the product of the reaction. The role of this newer reported exo site still needs to be investigated.


  • Organizational Affiliation

    Laboratoire de Chimie Biologique Structurale, Namur Institute of Structured Matter (NISM), Namur Research Institute for Life Sciences (NARILIS), University of Namur, Department of Chemistry, Rue de Bruxelles 61, 5000 Namur, Belgium.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Indoleamine 2,3-dioxygenase 1
A, B, C, D
405Homo sapiensMutation(s): 2 
Gene Names: IDO1IDOINDO
EC: 1.13.11.52
UniProt & NIH Common Fund Data Resources
Find proteins for P14902 (Homo sapiens)
Explore P14902 
Go to UniProtKB:  P14902
PHAROS:  P14902
GTEx:  ENSG00000131203 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP14902
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 7 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HEM (Subject of Investigation/LOI)
Query on HEM

Download Ideal Coordinates CCD File 
E [auth A],
IA [auth D],
O [auth B],
W [auth C]
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
NFK (Subject of Investigation/LOI)
Query on NFK

Download Ideal Coordinates CCD File 
F [auth A],
JA [auth D],
KA [auth D],
X [auth C]
N'-Formylkynurenine
C11 H12 N2 O4
BYHJHXPTQMMKCA-QMMMGPOBSA-N
TRP (Subject of Investigation/LOI)
Query on TRP

Download Ideal Coordinates CCD File 
LA [auth D],
MA [auth D],
Y [auth C]
TRYPTOPHAN
C11 H12 N2 O2
QIVBCDIJIAJPQS-VIFPVBQESA-N
PO4
Query on PO4

Download Ideal Coordinates CCD File 
G [auth A],
Z [auth C]
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
GOL
Query on GOL

Download Ideal Coordinates CCD File 
AA [auth C]
BA [auth C]
CA [auth C]
DA [auth C]
EA [auth C]
AA [auth C],
BA [auth C],
CA [auth C],
DA [auth C],
EA [auth C],
FA [auth C],
GA [auth C],
H [auth A],
I [auth A],
J [auth A],
K [auth A],
L [auth A],
M [auth A],
NA [auth D],
OA [auth D],
P [auth B],
Q [auth B],
R [auth B],
S [auth B],
T [auth B],
U [auth B]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
HA [auth C],
PA [auth D]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
OXY
Query on OXY

Download Ideal Coordinates CCD File 
N [auth A],
QA [auth D],
V [auth B]
OXYGEN MOLECULE
O2
MYMOFIZGZYHOMD-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.218 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.36α = 90
b = 114.57β = 90
c = 220.98γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
MxCuBEdata collection
Cootmodel building
PHASERphasing
XDSdata reduction
XDSdata scaling

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2021-12-29
    Type: Initial release
  • Version 1.1: 2022-01-05
    Changes: Database references
  • Version 1.2: 2024-01-31
    Changes: Data collection, Database references, Refinement description