3P8E

Crystal structure of human DIMETHYLARGININE DIMETHYLAMINOHYDROLASE-1 (DDAH-1) covalently bound with N5-(1-iminopentyl)-L-ornithine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4946 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.212 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Characterization of C-Alkyl Amidines as Bioavailable Covalent Reversible Inhibitors of Human DDAH-1.

Lluis, M.Wang, Y.Monzingo, A.F.Fast, W.Robertus, J.D.

(2011) Chemmedchem 6: 81-88

  • DOI: 10.1002/cmdc.201000392
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • C-Alkyl amidine analogues of asymmetric N(ω),N(ω)-dimethyl-L-arginine are dual-targeted inhibitors of both human DDAH-1 and nitric oxide (NO) synthase, and provide a promising scaffold for the development of therapeutics to control NO overproduction ...

    C-Alkyl amidine analogues of asymmetric N(ω),N(ω)-dimethyl-L-arginine are dual-targeted inhibitors of both human DDAH-1 and nitric oxide (NO) synthase, and provide a promising scaffold for the development of therapeutics to control NO overproduction in a variety of pathologies including septic shock and some cancers. Using a two-part click-chemistry-mediated activity probe, a homologated series of C-alkyl amidines were ranked for their ability to inhibit DDAH-1 within cultured HEK 293T cells. N⁵-(1-Iminopentyl)-L-ornithine was determined to be the most potent compound in vitro (K(d)=7 μM) as well as in cultured cells, and the binding conformation and covalent reversible mode of inhibition was investigated by comparison of interactions made with DDAH-1 and a catalytically inactive C274S variant, as gauged by X-ray crystallography and isothermal titration calorimetry. By interrupting the ability of the inhibitor to form a covalent bond, the contribution of this interaction could be estimated. These results suggest that further stabilization of the covalent adduct is a promising strategy for lead optimization in the design of effective reagents to block NO synthesis.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, Institute for Cellular and Molecular Biology, University of Texas, Austin, 78712-0165, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
N(G),N(G)-dimethylarginine dimethylaminohydrolase 1
A, B
308Homo sapiensMutation(s): 0 
Gene Names: DDAH1 (DDAH)
EC: 3.5.3.18
Find proteins for O94760 (Homo sapiens)
Go to Gene View: DDAH1
Go to UniProtKB:  O94760
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
LN7
Query on LN7

Download SDF File 
Download CCD File 
A, B
N~5~-[(1S)-1-aminopentyl]-L-ornithine
C10 H23 N3 O2
RLYDQIKERMGUOF-IUCAKERBSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
LN7Kd: 7000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4946 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.212 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 47.210α = 90.00
b = 80.900β = 90.13
c = 74.090γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
CrystalCleardata collection
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-11-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance