2BHJ | pdb_00002bhj

murine iNO synthase with coumarin inhibitor

• PDB DOI: https://doi.org/10.2210/pdb2BHJ/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Mus musculus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2005-01-12 Released: 2005-03-31 
• Deposition Author(s): Mathieu, M., Guilloteau, J.P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 
  0.323 (Depositor) 
• R-Value Work: 
  0.276 (Depositor) 
• R-Value Observed: 
  0.276 (Depositor) 

Starting Model: experimental

Literature

Design, Synthesis and Characterization of a Novel Class of Coumarin-Based Inhibitors of Inducible Nitric Oxide Synthase

Jackson, S.A., Sahni, S., Lee, L., Luo, Y., Nieduzak, T.R., Liang, G., Chiang, Y., Collar, N., Fink, D., He, W., Laoui, A., Merrill, J., Boffey, R., Crackett, P., Rees, B., Wong, M., Guilloteau, J.P., Mathieu, M., Rebello, S.S.

(2005) Bioorg Med Chem 13: 2723

• PubMed: 15781384 
• DOI: https://doi.org/10.1016/j.bmc.2005.02.036
• Primary Citation Related Structures: 
  2BHJ


• PubMed Abstract: 
  

  Inducible nitric oxide synthase (iNOS) has been implicated in various central and peripheral pathophysiological diseases. Our high throughput screening initially identified a weak inhibitor of iNOS, thiocoumarin 13. From this lead, a number of potent derivatives were prepared that demonstrate favorable potency, selectivity and kinetics. Compound 30 has an IC50 of 60 nM for mouse iNOS and 185-fold and 9-fold selectivity for bovine eNOS and rat nNOS, respectively. In cellular assays for iNOS, this compound has micromolar potency. Furthermore, two compounds (16 and 30) demonstrate a reasonable pharmacokinetic profile in rodents. The synthesis, SAR, and biological activity of this novel class of compounds is described.

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Organizational Affiliation: 
• Internal Medicine, Sanofi-Aventis Pharmaceuticals, Bridgewater, NJ08807, USA.

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 PQS (software)

Macromolecule Content 

• Total Structure Weight: 49.99 kDa 
• Atom Count: 3,474 
• Modeled Residue Count: 414 
• Deposited Residue Count: 422 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
NITRIC OXIDE SYNTHASE	A	422	Mus musculus	Mutation(s): 0  EC: 1.14.13.39
UniProt & NIH Common Fund Data Resources
Find proteins for P29477 (Mus musculus) Explore P29477  Go to UniProtKB:  P29477
IMPC:  MGI:97361

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEM	C [auth A]	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L
FC1	B [auth A]	THIOCOUMARIN C14 H17 N O2 S DIOZFKOOIBATNZ-UHFFFAOYSA-N
HBI	D [auth A]	7,8-DIHYDROBIOPTERIN C9 H13 N5 O3 FEMXZDUTFRTWPE-DZSWIPIPSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free:  0.323 (Depositor) 
• R-Value Work:  0.276 (Depositor) 
• R-Value Observed: 0.276 (Depositor) 

Space Group: P 6₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 213.54	α = 90
b = 213.54	β = 90
c = 115.03	γ = 120

Software Package:

Software Name	Purpose
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2005-03-31 
Deposition Author(s): Mathieu, M., Guilloteau, J.P.

Revision History  

• Version 1.0: 2005-03-31
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-12-13
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.4: 2024-10-16
  Changes: Structure summary