6XK4

Nitric Oxide Synthase from Bacillus subtilis in complex with 7-((3-(((3-(6-aminopyridin-2-yl)propyl)amino)methyl)phenoxy)methyl)quinolin-2-amine

• PDB DOI: https://doi.org/10.2210/pdb6XK4/pdb

• Classification: OXIDOREDUCTASE/Inhibitor
• Organism(s): Bacillus subtilis subsp. subtilis str. 168
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2020-06-25 Released: 2021-06-30 
• Deposition Author(s): Lewis, M.C., Poulos, T.L.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.13 Å
• R-Value Free: 0.246 
• R-Value Work: 0.209 
• R-Value Observed: 0.211 

Literature

Selective Anti-MRSA inhibitors targeting Nitric Oxide Synthase

Lewis, M.C., Poulos, T.L.

To be published.

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: 42.96 kDa 
• Atom Count: 3,121 
• Modelled Residue Count: 362 
• Deposited Residue Count: 363 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Nitric oxide synthase oxygenase	A	363	Bacillus subtilis subsp. subtilis str. 168	Mutation(s): 0  Gene Names: nos, yflM, BSU07630 EC: 1.14.14.47
UniProt
Find proteins for O34453 (Bacillus subtilis (strain 168)) Explore O34453  Go to UniProtKB:  O34453

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEM	B [auth A]	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L
V5D (Subject of Investigation/LOI)	C [auth A]	7-{[3-({[4-(6-aminopyridin-2-yl)butyl]amino}methyl)phenoxy]methyl}quinolin-2-amine C26 H29 N5 O QYKBESYQSCLLGR-UHFFFAOYSA-N
GOL	E [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
CL	D [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.13 Å
• R-Value Free: 0.246 
• R-Value Work: 0.209 
• R-Value Observed: 0.211 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 80.49	α = 90
b = 95.05	β = 90
c = 62.74	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
MOSFLM	data reduction
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2021-06-30 
Deposition Author(s): Lewis, M.C., Poulos, T.L.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM131920

Revision History  

• Version 1.0: 2021-06-30
  Type: Initial release
  
• Version 1.1: 2023-10-18
  Changes: Data collection, Database references, Refinement description