4FGK

Oxidized quinone reductase 2 in complex with chloroquine

• PDB DOI: https://doi.org/10.2210/pdb4FGK/pdb

• Classification: OXIDOREDUCTASE/OXIDOREDUCTASE inhibitor
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2012-06-04 Released: 2013-03-13 
• Deposition Author(s): Leung, K.K., Shilton, B.H.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 0.174 
• R-Value Work: 0.133 
• R-Value Observed: 0.133 

Literature

Crystal structures of quinone reductase 2 bound to antimalarial drugs reveal conformational change upon reduction

Leung, K.K., Shilton, B.H.

(2013) J Biol Chem 

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 54.56 kDa 
• Atom Count: 4,469 
• Modelled Residue Count: 460 
• Deposited Residue Count: 466 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Ribosyldihydronicotinamide dehydrogenase [quinone]	A, B	233	Homo sapiens	Mutation(s): 0  Gene Names: NMOR2, NQO2 EC: 1.10.99.2
UniProt & NIH Common Fund Data Resources
Find proteins for P16083 (Homo sapiens) Explore P16083  Go to UniProtKB:  P16083
PHAROS:  P16083 GTEx:  ENSG00000124588

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FAD	C [auth A], H [auth B]	FLAVIN-ADENINE DINUCLEOTIDE C27 H33 N9 O15 P2 VWWQXMAJTJZDQX-UYBVJOGSSA-N
0TX	D [auth A], F [auth A]	(4S)-N~4~-(7-chloroquinolin-4-yl)-N~1~,N~1~-diethylpentane-1,4-diamine C18 H26 Cl N3 WHTVZRBIWZFKQO-AWEZNQCLSA-N
ZN	E [auth A], G [auth B]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
0TX	BindingDB:  4FGK	IC50: 1500 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 0.174 
• R-Value Work: 0.133 
• R-Value Observed: 0.133 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 56.37	α = 90
b = 83.11	β = 90
c = 106.58	γ = 90

Software Package:

Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing
PHENIX	refinement
PDB_EXTRACT	data extraction
MxDC	data collection

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-03-13 
Deposition Author(s): Leung, K.K., Shilton, B.H.

Revision History  

• Version 1.0: 2013-03-13
  Type: Initial release
  
• Version 1.1: 2024-02-28
  Changes: Data collection, Database references, Derived calculations