4X0F

Crystal structure of crosslink stabilized long-form PDE4B in complex with (R)-(-)-rolipram


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.22 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.182 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Engineered stabilization and structural analysis of the autoinhibited conformation of PDE4.

Cedervall, P.Aulabaugh, A.Geoghegan, K.F.McLellan, T.J.Pandit, J.

(2015) Proc Natl Acad Sci U S A 112: E1414-E1422

  • DOI: https://doi.org/10.1073/pnas.1419906112
  • Primary Citation of Related Structures:  
    4WZI, 4X0F

  • PubMed Abstract: 

    Phosphodiesterase 4 (PDE4) is an essential contributor to intracellular signaling and an important drug target. The four members of this enzyme family (PDE4A to -D) are functional dimers in which each subunit contains two upstream conserved regions (UCR), UCR1 and -2, which precede the C-terminal catalytic domain. Alternative promoters, transcriptional start sites, and mRNA splicing lead to the existence of over 25 variants of PDE4, broadly classified as long, short, and supershort forms. We report the X-ray crystal structure of long form PDE4B containing UCR1, UCR2, and the catalytic domain, crystallized as a dimer in which a disulfide bond cross-links cysteines engineered into UCR2 and the catalytic domain. Biochemical and mass spectrometric analyses showed that the UCR2-catalytic domain interaction occurs in trans, and established that this interaction regulates the catalytic activity of PDE4. By elucidating the key structural determinants of dimerization, we show that only long forms of PDE4 can be regulated by this mechanism. The results also provide a structural basis for the long-standing observation of high- and low-affinity binding sites for the prototypic inhibitor rolipram.


  • Organizational Affiliation

    Structural Biology and Biophysics Group, Worldwide Research and Development, Pfizer, Inc., Groton, CT 06340.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
cAMP-specific 3',5'-cyclic phosphodiesterase 4B
A, B
655Homo sapiensMutation(s): 13 
Gene Names: PDE4BDPDE4
EC: 3.1.4.53
UniProt & NIH Common Fund Data Resources
Find proteins for Q07343 (Homo sapiens)
Explore Q07343 
Go to UniProtKB:  Q07343
PHAROS:  Q07343
GTEx:  ENSG00000184588 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ07343
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ROL
Query on ROL

Download Ideal Coordinates CCD File 
F [auth A],
J [auth B]
ROLIPRAM
C16 H21 N O3
HJORMJIFDVBMOB-LBPRGKRZSA-N
IOD
Query on IOD

Download Ideal Coordinates CCD File 
E [auth A],
I [auth B]
IODIDE ION
I
XMBWDFGMSWQBCA-UHFFFAOYSA-M
ZN
Query on ZN

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

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.22 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.182 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 137.4α = 90
b = 137.4β = 90
c = 142.97γ = 120
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
SCALAdata scaling
BUSTERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-03-11
    Type: Initial release
  • Version 1.1: 2015-04-01
    Changes: Database references
  • Version 1.2: 2017-05-31
    Changes: Other
  • Version 1.3: 2023-09-27
    Changes: Data collection, Database references, Derived calculations, Refinement description