4JHT | pdb_00004jht

Crystal Structure of AlkB in complex with 5-carboxy-8-hydroxyquinoline (IOX1)

• PDB DOI: https://doi.org/10.2210/pdb4JHT/pdb

• Classification: OXIDOREDUCTASE/OXIDOREDUCTASE INHIBITOR
• Organism(s): Escherichia coli K-12
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2013-03-05 Released: 2013-06-26 
• Deposition Author(s): Aik, W.S., McDonough, M.A., Schofield, C.J.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.18 Å
• R-Value Free: 
  0.166 (Depositor), 0.173 (DCC) 
• R-Value Work: 
  0.159 (Depositor), 0.169 (DCC) 

Starting Model: experimental

Literature

5-Carboxy-8-hydroxyquinoline is a Broad Spectrum 2-Oxoglutarate Oxygenase Inhibitor which Causes Iron Translocation.

Hopkinson, R.J., Tumber, A., Yapp, C., Chowdhury, R., Aik, W., Che, K.H., Li, X.S., Kristensen, J.B.L., King, O.N.F., Chan, M.C., Yeoh, K.K., Choi, H., Walport, L.J., Thinnes, C.C., Bush, J.T., Lejeune, C., Rydzik, A.M., Rose, N.R., Bagg, E.A., McDonough, M.A., Krojer, T., Yue, W.W., Ng, S.S., Olsen, L., Brennan, P.E., Oppermann, U., Muller-Knapp, S., Klose, R.J., Ratcliffe, P.J., Schofield, C.J., Kawamura, A.

(2013) Chem Sci 4: 3110-3117

• PubMed: 26682036 
• DOI: https://doi.org/10.1039/C3SC51122G
• Primary Citation Related Structures: 
  4BIO, 4BIS, 4JHT


• PubMed Abstract: 
  

  2-Oxoglutarate and iron dependent oxygenases are therapeutic targets for human diseases. Using a representative 2OG oxygenase panel, we compare the inhibitory activities of 5-carboxy-8-hydroxyquinoline (IOX1) and 4-carboxy-8-hydroxyquinoline (4C8HQ) with that of two other commonly used 2OG oxygenase inhibitors, N -oxalylglycine (NOG) and 2,4-pyridinedicarboxylic acid (2,4-PDCA). The results reveal that IOX1 has a broad spectrum of activity, as demonstrated by the inhibition of transcription factor hydroxylases, representatives of all 2OG dependent histone demethylase subfamilies, nucleic acid demethylases and γ-butyrobetaine hydroxylase. Cellular assays show that, unlike NOG and 2,4-PDCA, IOX1 is active against both cytosolic and nuclear 2OG oxygenases without ester derivatisation. Unexpectedly, crystallographic studies on these oxygenases demonstrate that IOX1, but not 4C8HQ, can cause translocation of the active site metal, revealing a rare example of protein ligand-induced metal movement.

---

Organizational Affiliation: 
• Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, U.K.
Structural Genomics Consortium, University of Oxford, Headington, OX3 7DQ, U.K.
Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Roosevelt Drive, OX3 7FZ, UK.
Botnar Research Centre, Oxford Biomedical Research Unit, Oxford OX3 7LD, U.K.
Epigenetic Regulation of Chromatin Function Group, Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QU, U.K.
Department of Medicinal Chemistry, Faculty of Pharmaceutical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark.
Henry Wellcome Building for Molecular Physiology, Nuffield Department of Medicine, University of Oxford, Roosevelt Drive, Oxford OX3 7LD, U.K.
Division of Cardiovascular Medicine, Radcliffe Department of Medicine, Wellcome Trust Centre for Human Genetics, Roosevelt Drive, Oxford, OX3 7LD, UK.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Macromolecule Content 

• Total Structure Weight: 23.33 kDa 
• Atom Count: 1,902 
• Modeled Residue Count: 201 
• Deposited Residue Count: 206 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Alpha-ketoglutarate-dependent dioxygenase AlkB	A	206	Escherichia coli K-12	Mutation(s): 0  Gene Names: aidD, alkB, b2212, JW2200 EC: 1.14.11.33
UniProt
Find proteins for P05050 (Escherichia coli (strain K12)) Explore P05050  Go to UniProtKB:  P05050

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
8XQ	B [auth A]	8-hydroxyquinoline-5-carboxylic acid C10 H7 N O3 JGRPKOGHYBAVMW-UHFFFAOYSA-N
DMS	E [auth A]	DIMETHYL SULFOXIDE C2 H6 O S IAZDPXIOMUYVGZ-UHFFFAOYSA-N
ACT	D [auth A]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M
MN	C [auth A]	MANGANESE (II) ION Mn WAEMQWOKJMHJLA-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
8XQ	BindingDB:  4JHT	IC50: 1.02e+4 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.18 Å
• R-Value Free:  0.166 (Depositor), 0.173 (DCC) 
• R-Value Work:  0.159 (Depositor), 0.169 (DCC) 

Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 36.839	α = 77.62
b = 38.848	β = 75.01
c = 40.45	γ = 66.1

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
PHENIX	refinement
PDB_EXTRACT	data extraction
GDA	data collection
PHENIX	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-06-26 
Deposition Author(s): Aik, W.S., McDonough, M.A., Schofield, C.J.

Revision History  

• Version 1.0: 2013-06-26
  Type: Initial release
  
• Version 1.1: 2014-09-17
  Changes: Database references
• Version 1.2: 2017-11-15
  Changes: Refinement description
• Version 1.3: 2019-12-25
  Changes: Database references
• Version 1.4: 2023-11-08
  Changes: Data collection, Database references, Derived calculations, Refinement description