4D1N

Structure of human nNOS heme domain with L-Arg bound

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.03 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 

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Literature

Structures of Human Constitutive Nitric Oxide Synthases

Li, H., Jamal, J., Plaza, C., Pineda, S.H., Chreifi, G., Jing, Q., Cinelli, M.A., Silverman, R.B., Poulos, T.L.

(2014) Acta Crystallogr D Biol Crystallogr 70: 2667

  • DOI: 10.1107/S1399004714017064
  • Primary Citation of Related Structures:  
    4D1N, 4D1O, 4D1P

  • PubMed Abstract: 

    • Mammals produce three isoforms of nitric oxide synthase (NOS): neuronal NOS (nNOS), inducible NOS (iNOS) and endothelial NOS (eNOS). The overproduction of NO by nNOS is associated with a number of neurodegenerative disorders; therefore, a desirable therapeutic goal is the design of drugs that target nNOS but not the other isoforms ...

    Mammals produce three isoforms of nitric oxide synthase (NOS): neuronal NOS (nNOS), inducible NOS (iNOS) and endothelial NOS (eNOS). The overproduction of NO by nNOS is associated with a number of neurodegenerative disorders; therefore, a desirable therapeutic goal is the design of drugs that target nNOS but not the other isoforms. Crystallography, coupled with computational approaches and medicinal chemistry, has played a critical role in developing highly selective nNOS inhibitors that exhibit exceptional neuroprotective properties. For historic reasons, crystallography has focused on rat nNOS and bovine eNOS because these were available in high quality; thus, their structures have been used in structure-activity-relationship studies. Although these constitutive NOSs share more than 90% sequence identity across mammalian species for each NOS isoform, inhibitor-binding studies revealed that subtle differences near the heme active site in the same NOS isoform across species still impact enzyme-inhibitor interactions. Therefore, structures of the human constitutive NOSs are indispensible. Here, the first structure of human neuronal NOS at 2.03 Å resolution is reported and a different crystal form of human endothelial NOS is reported at 1.73 Å resolution.

    Organizational Affiliation: 

    Departments of Molecular Biology and Biochemistry, Pharmaceutical Sciences and Chemistry, University of California, Irvine, 517 Bison Avenue, Irvine, CA 92697-3900, USA.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
NITRIC OXIDE SYNTHASE, BRAINA, B, C, D420Homo sapiensMutation(s): 2 
Gene Names: NOS1
EC: 1.14.13.39
UniProt & NIH Common Fund Data Resources
Find proteins for P29475 (Homo sapiens)
Explore P29475 
Go to UniProtKB:  P29475
PHAROS:  P29475
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP29475
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM
Download Ideal Coordinates CCD File 
F [auth A],
K [auth B],
O [auth C],
V [auth D]		PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L		 Ligand Interaction
H4B
Query on H4B
Download Ideal Coordinates CCD File 
G [auth A],
L [auth B],
P [auth C],
W [auth D]		5,6,7,8-TETRAHYDROBIOPTERIN
C9 H15 N5 O3
FNKQXYHWGSIFBK-RPDRRWSUSA-N		 Ligand Interaction
ARG
Query on ARG
Download Ideal Coordinates CCD File 
E [auth A],
J [auth B],
N [auth C],
U [auth D]		ARGININE
C6 H15 N4 O2
ODKSFYDXXFIFQN-BYPYZUCNSA-O		 Ligand Interaction
GOL
Query on GOL
Download Ideal Coordinates CCD File 
H [auth A],
M [auth B],
Q [auth C],
R [auth C],
S [auth C],
H [auth A],
M [auth B],
Q [auth C],
R [auth C],
S [auth C],
X [auth D],
Y [auth D]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N		 Ligand Interaction
ZN
Query on ZN
Download Ideal Coordinates CCD File 
I [auth A],
T [auth C]		ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.03 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 174.923α = 90
b = 84.664β = 90.94
c = 166.745γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2014-05-02 
  • Released Date: 2014-10-15 
    • Deposition Author(s): Li, H., Poulos, T.L.

Revision History  (Full details and data files)

  • Version 1.0: 2014-10-15
    Type: Initial release
  • Version 1.1: 2014-10-22
    Changes: Database references