4GH6

Crystal structure of the PDE9A catalytic domain in complex with inhibitor 28


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.212 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure-Based Discovery of Highly Selective Phosphodiesterase-9A Inhibitors and Implications for Inhibitor Design.

Meng, F.Hou, J.Shao, Y.X.Wu, P.Y.Huang, M.Zhu, X.Cai, Y.Li, Z.Xu, J.Liu, P.Luo, H.B.Wan, Y.Ke, H.

(2012) J.Med.Chem. 55: 8549-8558

  • DOI: 10.1021/jm301189c

  • PubMed Abstract: 
  • A new series of phosphodiesterase-9 (PDE9) inhibitors that contain a scaffold of 6-amino-pyrazolopyrimidinone have been discovered by a combination of structure-based design and computational docking. This procedure significantly saved the load of ch ...

    A new series of phosphodiesterase-9 (PDE9) inhibitors that contain a scaffold of 6-amino-pyrazolopyrimidinone have been discovered by a combination of structure-based design and computational docking. This procedure significantly saved the load of chemical synthesis and is an effective method for the discovery of inhibitors. The best compound 28 has an IC(50) of 21 nM and 3.3 μM, respectively, for PDE9 and PDE5 and about 3 orders of magnitude of selectivity against other PDE families. The crystal structure of the PDE9 catalytic domain in complex with 28 has been determined and shows a hydrogen bond between 28 and Tyr424. This hydrogen bond may account for the 860-fold selectivity of 28 against PDE1B, in comparison with about 30-fold selectivity of BAY73-6691. Thus, our studies suggest that Tyr424, a unique residue of PDE8 and PDE9, is a potential target for improvement of selectivity of PDE9 inhibitors.


    Organizational Affiliation

    School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, People's Republic of China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
High affinity cGMP-specific 3',5'-cyclic phosphodiesterase 9A
A, B
326Homo sapiensGene Names: PDE9A
EC: 3.1.4.35
Find proteins for O76083 (Homo sapiens)
Go to Gene View: PDE9A
Go to UniProtKB:  O76083
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
LUO
Query on LUO

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Download CCD File 
A, B
N-(4-methoxyphenyl)-N~2~-[1-(2-methylphenyl)-4-oxo-4,5-dihydro-1H-pyrazolo[3,4-d]pyrimidin-6-yl]-L-alaninamide
C22 H22 N6 O3
VHGPQZWYIWLLDA-AWEZNQCLSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
LUOIC50: 21 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.212 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 104.276α = 90.00
b = 104.276β = 90.00
c = 270.073γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
AMoREphasing
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2012-08-07 
  • Released Date: 2012-10-03 
  • Deposition Author(s): Hou, J., Ke, H.

Revision History 

  • Version 1.0: 2012-10-03
    Type: Initial release
  • Version 1.1: 2012-11-14
    Type: Database references