2ZMF

Crystal structure of the C-terminal GAF domain of human phosphodiesterase 10A

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history. 

Literature

Crystal Structure of the GAF-B Domain from Human Phosphodiesterase 10A Complexed with Its Ligand, cAMP

Handa, N., Mizohata, E., Kishishita, S., Toyama, M., Morita, S., Uchikubo-Kamo, T., Akasaka, R., Omori, K., Kotera, J., Terada, T., Shirouzu, M., Yokoyama, S.

(2008) J.Biol.Chem. 283: 19657-19664

  • DOI: 10.1074/jbc.M800595200

  • PubMed Abstract: 

    • Cyclic nucleotide phosphodiesterases (PDEs) catalyze the degradation of the cyclic nucleotides cAMP and cGMP, which are important second messengers. Five of the 11 mammalian PDE families have tandem GAF domains at their N termini. PDE10A may be the o ...

    Cyclic nucleotide phosphodiesterases (PDEs) catalyze the degradation of the cyclic nucleotides cAMP and cGMP, which are important second messengers. Five of the 11 mammalian PDE families have tandem GAF domains at their N termini. PDE10A may be the only mammalian PDE for which cAMP is the GAF domain ligand, and it may be allosterically stimulated by cAMP. PDE10A is highly expressed in striatal medium spiny neurons. Here we report the crystal structure of the C-terminal GAF domain (GAF-B) of human PDE10A complexed with cAMP at 2.1-angstroms resolution. The conformation of the PDE10A GAF-B domain monomer closely resembles those of the GAF domains of PDE2A and the cyanobacterium Anabaena cyaB2 adenylyl cyclase, except for the helical bundle consisting of alpha1, alpha2, and alpha5. The PDE10A GAF-B domain forms a dimer in the crystal and in solution. The dimerization is mainly mediated by hydrophobic interactions between the helical bundles in a parallel arrangement, with a large buried surface area. In the PDE10A GAF-B domain, cAMP tightly binds to a cNMP-binding pocket. The residues in the alpha3 and alpha4 helices, the beta6 strand, the loop between 3(10) and alpha4, and the loop between alpha4 and beta5 are involved in the recognition of the phosphate and ribose moieties. This recognition mode is similar to those of the GAF domains of PDE2A and cyaB2. In contrast, the adenine base is specifically recognized by the PDE10A GAF-B domain in a unique manner, through residues in the beta1 and beta2 strands.

    Organizational Affiliation: 

    Systems and Structural Biology Center, Yokohama Institute, RIKEN, Yokohama 230-0045, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
cAMP and cAMP-inhibited cGMP 3',5'-cyclic phosphodiesterase 10A
A, B
189Homo sapiensMutation(s): 0 
Gene Names: PDE10A
EC: 3.1.4.17, 3.1.4.35
Find proteins for Q9Y233 (Homo sapiens)
Go to Gene View: PDE10A
Go to UniProtKB:  Q9Y233
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CMP
Query on CMP
Download SDF File 
Download CCD File 
A, B
ADENOSINE-3',5'-CYCLIC-MONOPHOSPHATE
CYCLIC AMP; CAMP
C10 H12 N5 O6 P
IVOMOUWHDPKRLL-KQYNXXCUSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.199 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 74.506α = 90.00
b = 74.506β = 90.00
c = 146.524γ = 120.00
Software Package:
Software NamePurpose
SOLVEphasing
REFMACrefinement
HKL-2000data scaling
HKL-2000data collection
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-04-29
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance