249,906
Structures from the PDB archive

1,068,577
Computed Structure Models (CSM)

5FVO|pdb_00005fvo

Structure of rat neuronal nitric oxide synthase heme domain in complex with 6-(2-(5-(3-methoxypropylamino)pyridin-3-yl)ethyl)-4- methylpyridin-2-amine

PDB DOI: https://doi.org/10.2210/pdb5FVO/pdb

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

Deposited: 2016-02-10 Released: 2016-04-20
Deposition Author(s): Li, H.,Poulos, T.L.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.12 Å
R-Value Free:
0.255 (Depositor), 0.250 (DCC)
R-Value Work:
0.198 (Depositor), 0.200 (DCC)
R-Value Observed:
0.201 (Depositor)

wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 1.2 of the entry. See complete history.

Literature

Potent and Selective Human Neuronal Nitric Oxide Synthase Inhibition by Optimization of the 2-Aminopyridine-Based Scaffold with a Pyridine Linker.

Wang, H., Qin, Y., Li, H., Roman, L.J., Martasek, P., Poulos, T.L., Silverman, R.B.

(2016) J Med Chem 59: 4913

PubMed: 27050842 Search on PubMedSearch on PubMed Central
DOI: https://doi.org/10.1021/acs.jmedchem.6b00273
Primary Citation of Related Structures:
5FVO,5FVP,5FVQ,5FVR,5FVS,5FVT,5FVU,5FVV,5FVW,5FVX,5FVY,5FVZ,5FW0

PubMed Abstract:
Neuronal nitric oxide synthase (nNOS) is an important therapeutic target for the treatment of various neurodegenerative disorders. A major challenge in the design of nNOS inhibitors focuses on potency in humans and selectivity over other NOS isoforms. Here we report potent and selective human nNOS inhibitors based on the 2-aminopyridine scaffold with a central pyridine linker. Compound 14j, the most promising inhibitor in this study, exhibits excellent potency for rat nNOS (Ki = 16 nM) with 828-fold n/e and 118-fold n/i selectivity with a Ki value of 13 nM against human nNOS with 1761-fold human n/e selectivity. Compound 14j also displayed good metabolic stability in human liver microsomes, low plasma protein binding, and minimal binding to cytochromes P450 (CYPs), although it had little to no Caco-2 permeability.

Organizational Affiliation

Department of Chemistry, Department of Molecular Biosciences, Chemistry of Life Processes Institute, Center for Molecular Innovation and Drug Discovery, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States.

State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University , Nanjing 210093, People's Republic of China.

Departments of Molecular Biology and Biochemistry, Pharmaceutical Sciences, and Chemistry, University of California , Irvine, California 92697-3900, United States.

Department of Biochemistry, University of Texas Health Science Center , San Antonio, Texas 78384-7760, United States.

Department of Pediatrics, First Faculty of Medicine, Charles University , 121 08 Prague, Czech Republic.

BIOCEV , 252 42 Vestec, Czech Republic.

Macromolecule Content

Total Structure Weight: 50.04 kDa
Atom Count: 3,501
Modeled Residue Count: 411
Deposited Residue Count: 422
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
NITRIC OXIDE SYNTHASE, BRAIN	A	422	Homo sapiens	Mutation(s): 0 EC: 1.14.13.39
UniProt
Find proteins for P29476 (Rattus norvegicus) Explore P29476 Go to UniProtKB: P29476
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P29476
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
HEM Query on HEM Download Ideal Coordinates CCD File SDF format, chain B [auth A] MOL2 format, chain B [auth A] mmCIF format, chain B [auth A]	B [auth A]	PROTOPORPHYRIN IX CONTAINING FE C₃₄ H₃₂ Fe N₄ O₄ KABFMIBPWCXCRK-RGGAHWMASA-L		Interactions Focus chain B [auth A] Interactions & Density Focus chain B [auth A]
D8H Query on D8H Download Ideal Coordinates CCD File SDF format, chain D [auth A] MOL2 format, chain D [auth A] mmCIF format, chain D [auth A]	D [auth A]	6-(2-(5-(3-methoxypropylamino)pyridin-3-yl)ethyl)-4-methylpyridin-2-amine C₁₇ H₂₄ N₄ O DFYOVMPZILDHIP-UHFFFAOYSA-N		Interactions Focus chain D [auth A] Interactions & Density Focus chain D [auth A]
H4B Query on H4B Download Ideal Coordinates CCD File SDF format, chain C [auth A] MOL2 format, chain C [auth A] mmCIF format, chain C [auth A]	C [auth A]	5,6,7,8-TETRAHYDROBIOPTERIN C₉ H₁₅ N₅ O₃ FNKQXYHWGSIFBK-RPDRRWSUSA-N		Interactions Focus chain C [auth A] Interactions & Density Focus chain C [auth A]
ZN Query on ZN Download Ideal Coordinates CCD File SDF format, chain E [auth A] MOL2 format, chain E [auth A] mmCIF format, chain E [auth A]	E [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N		Interactions Focus chain E [auth A] Interactions & Density Focus chain E [auth A]

Binding Affinity Annotations
ID	Source	Binding Affinity
D8H	BindingDB: 5FVO	Ki: 558 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.12 Å
R-Value Free: 0.255 (Depositor), 0.250 (DCC)
R-Value Work: 0.198 (Depositor), 0.200 (DCC)
R-Value Observed: 0.201 (Depositor)

Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 44.9	α = 90
b = 108.2	β = 90
c = 164.29	γ = 90

Software Package:

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

Structure Validation

View Full Validation Report

Ligand Structure Quality Assessment

View more in-depth experimental data

Entry History

Deposition Data

Released Date: 2016-04-20

Deposition Author(s):

Li, H.

Poulos, T.L.

Revision History (Full details and data files)

Version 1.0: 2016-04-20
Type: Initial release
Version 1.1: 2016-06-08
Changes: Database references
Version 1.2: 2024-05-08
Changes: Data collection, Database references, Derived calculations, Other