6pnh: Difference between revisions

Latest revision as of 13:44, 13 August 2026

Structure of human neuronal nitric oxide synthase R354A/G357D mutant heme domain in complex with 7-(3-(Aminomethyl)-4-isopropoxyphenyl)-4-methylquinolin-2-amine

Structural highlights

Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.85Å
Ligands:	HEM, OSD, ZN
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Publication Abstract from PubMed

Inhibition of neuronal nitric oxide synthase (nNOS), an enzyme implicated in neurodegenerative disorders, is an attractive strategy for treating or preventing these diseases. We previously developed several classes of 2-aminoquinoline-based nNOS inhibitors, but these compounds had drawbacks including off-target promiscuity, low activity against human nNOS, and only modest selectivity for nNOS over related enzymes. In this study, we synthesized new nNOS inhibitors based on 7-phenyl-2-aminoquinoline and assayed them against rat and human nNOS, human eNOS, and murine and (in some cases) human iNOS. Compounds with a meta-relationship between the aminoquinoline and a positively charged tail moiety were potent and had up to nearly 900-fold selectivity for human nNOS over human eNOS. X-ray crystallography indicates that the amino groups of some compounds occupy a water-filled pocket surrounding an nNOS-specific aspartate residue (absent in eNOS). This interaction was confirmed by mutagenesis studies, making 7-phenyl-2-aminoquinolines the first aminoquinolines to interact with this residue.

First Contact: 7-Phenyl-2-Aminoquinolines, Potent and Selective Neuronal Nitric Oxide Synthase Inhibitors That Target an Isoform-Specific Aspartate.,Cinelli MA, Reidl CT, Li H, Chreifi G, Poulos TL, Silverman RB J Med Chem. 2020 Apr 17. doi: 10.1021/acs.jmedchem.9b01573. PMID:32302123^[1]

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

References

↑ Cinelli MA, Reidl CT, Li H, Chreifi G, Poulos TL, Silverman RB. First Contact: 7-Phenyl-2-Aminoquinolines, Potent and Selective Neuronal Nitric Oxide Synthase Inhibitors That Target an Isoform-Specific Aspartate. J Med Chem. 2020 Apr 17. doi: 10.1021/acs.jmedchem.9b01573. PMID:32302123 doi:https://dx.doi.org/10.1021/acs.jmedchem.9b01573

Proteopedia Page Contributors and Editors (what is this?)

OCA

[1] Cinelli MA, Reidl CT, Li H, Chreifi G, Poulos TL, Silverman RB. First Contact: 7-Phenyl-2-Aminoquinolines, Potent and Selective Neuronal Nitric Oxide Synthase Inhibitors That Target an Isoform-Specific Aspartate. J Med Chem. 2020 Apr 17. doi: 10.1021/acs.jmedchem.9b01573. PMID:32302123 doi:https://dx.doi.org/10.1021/acs.jmedchem.9b01573

[1]

@@ Line 3: / Line 3: @@
 <StructureSection load='6pnh' size='340' side='right'caption='[[6pnh]], [[Resolution|resolution]] 1.85&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[6pnh]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6PNH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6PNH FirstGlance]. <br>
+<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6PNH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6PNH FirstGlance]. <br>
 </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.85&#8491;</td></tr>
 <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=OSD:7-{3-(aminomethyl)-4-[(propan-2-yl)oxy]phenyl}-4-methylquinolin-2-amine'>OSD</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
 <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6pnh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6pnh OCA], [https://pdbe.org/6pnh PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6pnh RCSB], [https://www.ebi.ac.uk/pdbsum/6pnh PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6pnh ProSAT]</span></td></tr>
 </table>
-== Function ==
-[https://www.uniprot.org/uniprot/NOS1_HUMAN NOS1_HUMAN] 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. Probably has nitrosylase activity and mediates cysteine S-nitrosylation of cytoplasmic target proteins such SRR.
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 26: / Line 24: @@
 __TOC__
 </StructureSection>
-[[Category: Homo sapiens]]
 [[Category: Large Structures]]
 [[Category: Li H]]
 [[Category: Poulos TL]]

6pnh: Difference between revisions

Latest revision as of 13:44, 13 August 2026

Structure of human neuronal nitric oxide synthase R354A/G357D mutant heme domain in complex with 7-(3-(Aminomethyl)-4-isopropoxyphenyl)-4-methylquinolin-2-amine

Structural highlights

Publication Abstract from PubMed

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References

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