3DQR

Structure of neuronal NOS D597N/M336V mutant heme domain in complex with a inhibitor (+-)-N1-{cis-4'-[(6"-aminopyridin-2"-yl)methyl]pyrrolidin-3'-yl}ethane-1,2-diamine

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.205 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

Crystal structures of constitutive nitric oxide synthases in complex with de novo designed inhibitors.

Igarashi, J., Li, H., Jamal, J., Ji, H., Fang, J., Lawton, G.R., Silverman, R.B., Poulos, T.L.

(2009) J Med Chem 52: 2060-2066

  • DOI: 10.1021/jm900007a
  • Primary Citation of Related Structures:  
    3DQR, 3DQS, 3DQT, 3B3O, 3B3P

  • PubMed Abstract: 

    • New nitric oxide synthase (NOS) inhibitors were designed de novo with knowledge gathered from the studies on the nNOS-selective dipeptide inhibitors. Each of the new inhibitors consists of three fragments: an aminopyridine ring, a pyrrolidine, and a tail of various length and polarity ...

    New nitric oxide synthase (NOS) inhibitors were designed de novo with knowledge gathered from the studies on the nNOS-selective dipeptide inhibitors. Each of the new inhibitors consists of three fragments: an aminopyridine ring, a pyrrolidine, and a tail of various length and polarity. The in vitro inhibitory assays indicate good potency and isoform selectivity for some of the compounds. Crystal structures of these inhibitors bound to either wild type or mutant nNOS and eNOS have confirmed design expectations. The aminopyridine ring mimics the guanidinium group of L-arginine and functions as an anchor to place the compound in the NOS active site where it hydrogen bonds to a conserved Glu. The rigidity of the pyrrolidine ring places the pyrrolidine ring nitrogen between the same conserved Glu and the selective residue nNOS Asp597/eNOS Asn368, which results in similar interactions observed with the alpha-amino group of dipeptide inhibitors bound to nNOS. These structures provide additional information to help in the design of inhibitors with greater potency, physicochemical properties, and isoform selectivity.

    Organizational Affiliation: 

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



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Nitric oxide synthase, brainA, B422Rattus norvegicusMutation(s): 2 
Gene Names: Nos1, Bnos
EC: 1.14.13.39
Find proteins for P29476 (Rattus norvegicus)
Explore P29476 
Go to UniProtKB:  P29476
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM
Download Ideal Coordinates CCD File 
 D [auth A], I [auth B]PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L		 Ligand Interaction
H4B
Query on H4B
Download Ideal Coordinates CCD File 
 E [auth A], J [auth B]5,6,7,8-TETRAHYDROBIOPTERIN
C9 H15 N5 O3
FNKQXYHWGSIFBK-RPDRRWSUSA-N		 Ligand Interaction
JI2
Query on JI2
Download Ideal Coordinates CCD File 
 F [auth A], K [auth B]N-{(3S,4S)-4-[(6-aminopyridin-2-yl)methyl]pyrrolidin-3-yl}ethane-1,2-diamine
C12 H21 N5
BETYXZSFUFTOLC-GXSJLCMTSA-N		 Ligand Interaction
ZN
Query on ZN
Download Ideal Coordinates CCD File 
 H [auth B]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
ACT
Query on ACT
Download Ideal Coordinates CCD File 
 C [auth A], G [auth B]ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M		 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
JI2Ki:  388   nM  BindingDB
JI2Ki:  58400   nM  BindingDB
JI2Ki:  36700   nM  BindingDB
JI2IC50:  6300   nM  BindingDB
JI2IC50:  15300   nM  BindingDB
JI2Ki:  388   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.205 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.87α = 90
b = 110.7β = 90
c = 164.36γ = 90
Software Package:
Software NamePurpose
CNSrefinement
ADSCdata collection
HKL-2000data reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-03-31
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance