6auv

From Proteopedia

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

PDB ID 6auv

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Structural highlights

6auv is a 2 chain structure with sequence from Rattus norvegicus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.76Å
Ligands:	, , , ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

NOS1_RAT Produces nitric oxide (NO) which is a messenger molecule with diverse functions throughout the body. In the brain and peripheral nervous system, NO displays many properties of a neurotransmitter. Inhibitory transmitter for non-adrenergic and non-cholinergic nerves in the colorectum. Probably has nitrosylase activity and mediates cysteine S-nitrosylation of cytoplasmic target proteins such SRR. Inhibitory transmitter for non-adrenergic and non-cholinergic nerves in the colorectum.

Publication Abstract from PubMed

Inhibition of neuronal nitric oxide synthase (nNOS) is a promising therapeutic approach to treat neurodegenerative diseases. Recently, we have achieved considerable progress in improving the potency and isoform selectivity of human nNOS inhibitors bearing a 2-aminopyridine scaffold. However, these inhibitors still suffered from too low cell membrane permeability to enter into CNS drug development. We report herein our studies to improve permeability of nNOS inhibitors as measured by both PAMPA-BBB and Caco-2 assays. The most permeable compound (12) in this study still preserves excellent potency with human nNOS (Ki = 30 nM) and very high selectivity over other NOS isoforms, especially human eNOS (hnNOS/heNOS = 2799, the highest hnNOS/heNOS ratio we have obtained to date). X-ray crystallographic analysis reveals that 12 adopts a similar binding mode in both rat and human nNOS, in which the 2-aminopyridine and the fluorobenzene linker form crucial hydrogen bonds with glutamate and tyrosine residues, respectively.

Improvement of Cell Permeability of Human Neuronal Nitric Oxide Synthase Inhibitors Using Potent and Selective 2-Aminopyridine-Based Scaffolds with a Fluorobenzene Linker.,Do HT, Wang HY, Li H, Chreifi G, Poulos TL, Silverman RB J Med Chem. 2017 Nov 22;60(22):9360-9375. doi: 10.1021/acs.jmedchem.7b01356. Epub, 2017 Nov 1. PMID:29091437^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Do HT, Wang HY, Li H, Chreifi G, Poulos TL, Silverman RB. Improvement of Cell Permeability of Human Neuronal Nitric Oxide Synthase Inhibitors Using Potent and Selective 2-Aminopyridine-Based Scaffolds with a Fluorobenzene Linker. J Med Chem. 2017 Nov 22;60(22):9360-9375. doi: 10.1021/acs.jmedchem.7b01356. Epub, 2017 Nov 1. PMID:29091437 doi:http://dx.doi.org/10.1021/acs.jmedchem.7b01356