7AY6

Crystal structure of the PDE4D catalytic domain in complex with GEBR-41b


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.66 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Design, synthesis, biological evaluation and structural characterization of novel GEBR library PDE4D inhibitors.

Brullo, C.Rapetti, F.Abbate, S.Prosdocimi, T.Torretta, A.Semrau, M.Massa, M.Alfei, S.Storici, P.Parisini, E.Bruno, O.

(2021) Eur J Med Chem 223: 113638-113638

  • DOI: https://doi.org/10.1016/j.ejmech.2021.113638
  • Primary Citation of Related Structures:  
    7AY6, 7B9H

  • PubMed Abstract: 

    Memory and cognitive functions depend on the cerebral levels of cyclic adenosine monophosphate (cAMP), which are regulated by the phosphodiesterase 4 (PDE4) family of enzymes. Selected rolipram-related PDE4 inhibitors, members of the GEBR library, have been shown to increase hippocampal cAMP levels, providing pro-cognitive benefits with a safe pharmacological profile. In a recent SAR investigation involving a subset of GEBR library compounds, we have demonstrated that, depending on length and flexibility, ligands can either adopt a twisted, an extended or a protruding conformation, the latter allowing the ligand to form stabilizing contacts with the regulatory domain of the enzyme. Here, based on those findings, we describe further chemical modifications of the protruding subset of GEBR library inhibitors and their effects on ligand conformation and potency. In particular, we demonstrate that the insertion of a methyl group in the flexible linker region connecting the catechol portion and the basic end of the molecules enhances the ability of the ligand to interact with both the catalytic and the regulatory domains of the enzyme.


  • Organizational Affiliation

    Department of Pharmacy, School of Medical and Pharmaceutical Sciences, University of Genova, Viale Benedetto XV 3, 16132, Genova, Italy.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
cAMP-specific 3',5'-cyclic phosphodiesterase 4D
A, B
343Homo 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 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
S8Q (Subject of Investigation/LOI)
Query on S8Q

Download Ideal Coordinates CCD File 
C [auth A],
Q [auth B]
2-[(~{Z})-1-(3-cyclopentyloxy-4-methoxy-phenyl)ethylideneamino]oxy-1-[(2~{S},6~{S})-2,6-dimethylmorpholin-4-yl]ethanone
C22 H32 N2 O5
FNQKMGFRSDCOQF-YOYLNRMTSA-N
ZN
Query on ZN

Download Ideal Coordinates CCD File 
D [auth A],
R [auth B]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
EDO
Query on EDO

Download Ideal Coordinates CCD File 
AA [auth B]
BA [auth B]
J [auth A]
K [auth A]
L [auth A]
AA [auth B],
BA [auth B],
J [auth A],
K [auth A],
L [auth A],
M [auth A],
N [auth A],
O [auth A],
P [auth A],
V [auth B],
W [auth B],
X [auth B],
Y [auth B],
Z [auth B]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
E [auth A]
F [auth A]
G [auth A]
H [auth A]
I [auth A]
E [auth A],
F [auth A],
G [auth A],
H [auth A],
I [auth A],
S [auth B],
T [auth B],
U [auth B]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.66 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.838α = 90
b = 98.66β = 90
c = 120.239γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
MOSFLMdata reduction
Aimlessdata scaling
PHENIXphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2021-06-30
    Type: Initial release
  • Version 1.1: 2021-07-07
    Changes: Database references
  • Version 1.2: 2024-01-31
    Changes: Data collection, Database references, Refinement description