7XAB

Crystal structure of PDE4D catalytic domain complexed with compound 22d


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.198 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Discovery of novel PDE4 inhibitors targeting the M-pocket from natural mangostanin with improved safety for the treatment of Inflammatory Bowel Diseases.

Liu, H.Wang, Q.Huang, Y.Deng, J.Xie, X.Zhu, J.Yuan, Y.He, Y.M.Huang, Y.Y.Luo, H.B.He, X.

(2022) Eur J Med Chem 242: 114631-114631

  • DOI: https://doi.org/10.1016/j.ejmech.2022.114631
  • Primary Citation of Related Structures:  
    7XAA, 7XAB

  • PubMed Abstract: 

    Inflammatory Bowel Diseases (IBDs) are chronic disorders with iterative intestinal mucosal inflammation which remain unmet medical needs. PDE4 inhibitors were reported to be novel anti-IBD agents, but their clinical use was hampered by side effects such as emesis and nausea. Herein, structure-based discovery of natural mangostanin (1) targeting the M-pocket resulted in the novel and potent PDE4 inhibitor 22d (IC 50  = 3.5 nM) and favorable physico-chemical properties. X-Ray study revealed that 22d interacted tightly with the M-pocket and maintained the key interactions between PDE4 and roflumilast. Worthy to note that compounds 22d and our previously reported 4e and 18a, originating from mangostanin, all caused no emesis on beagle dogs at the oral dose of 10 mg/kg, confirming the safety superiority of scaffold in mangostanin derivatives over that in positive roflumilast. Finally, administration of 22d (5.0 mg/kg, twice-daily) exhibited comparable anti-IBD effects to the positive control dipyridamole (25.0 mg/kg, twice-daily) in the dextran sulfate sodium (DSS)-induced IBD mice model, indicating its potential as a novel anti-IBD agent.


  • Organizational Affiliation

    School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Isoform 3 of cAMP-specific 3',5'-cyclic phosphodiesterase 4D
A, B
507Homo sapiensMutation(s): 0 
Gene Names: PDE4DDPDE3
EC: 3.1.4.53
UniProt & NIH Common Fund Data Resources
Find proteins for Q08499 (Homo sapiens)
Explore Q08499 
Go to UniProtKB:  Q08499
PHAROS:  Q08499
GTEx:  ENSG00000113448 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ08499
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
AWI (Subject of Investigation/LOI)
Query on AWI

Download Ideal Coordinates CCD File 
E [auth A],
H [auth B]
9-(cyclopropylmethoxy)-8-methoxy-2,2-dimethyl-7-(3-methylbut-2-enyl)-5-(pyridin-4-ylmethoxy)pyrano[3,2-b]xanthen-6-one
C34 H35 N O6
ZMZGFAGXALOLIK-UHFFFAOYSA-N
ZN
Query on ZN

Download Ideal Coordinates CCD File 
C [auth A],
F [auth B]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
D [auth A],
G [auth B]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.198 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.622α = 90
b = 80.41β = 90
c = 162.952γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
CrysalisProdata reduction
CrysalisProdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China82003576
National Natural Science Foundation of China (NSFC)China21877134
National Natural Science Foundation of China (NSFC)China22077143

Revision History  (Full details and data files)

  • Version 1.0: 2023-02-22
    Type: Initial release
  • Version 1.1: 2023-11-29
    Changes: Data collection, Refinement description