4WCC

Catalytic domain of mouse 2',3'-cyclic nucleotide 3'- phosphodiesterase, with mutation P225G


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Determinants of ligand binding and catalytic activity in the myelin enzyme 2',3'-cyclic nucleotide 3'-phosphodiesterase.

Raasakka, A.Myllykoski, M.Laulumaa, S.Lehtimaki, M.Hartlein, M.Moulin, M.Kursula, I.Kursula, P.

(2015) Sci Rep 5: 16520-16520

  • DOI: 10.1038/srep16520
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • 2',3'-cyclic nucleotide 3'-phosphodiesterase (CNPase) is an enzyme highly abundant in the central nervous system myelin of terrestrial vertebrates. The catalytic domain of CNPase belongs to the 2H phosphoesterase superfamily and catalyzes the hydroly ...

    2',3'-cyclic nucleotide 3'-phosphodiesterase (CNPase) is an enzyme highly abundant in the central nervous system myelin of terrestrial vertebrates. The catalytic domain of CNPase belongs to the 2H phosphoesterase superfamily and catalyzes the hydrolysis of nucleoside 2',3'-cyclic monophosphates to nucleoside 2'-monophosphates. The detailed reaction mechanism and the essential catalytic amino acids involved have been described earlier, but the roles of many amino acids in the vicinity of the active site have remained unknown. Here, several CNPase catalytic domain mutants were studied using enzyme kinetics assays, thermal stability experiments, and X-ray crystallography. Additionally, the crystal structure of a perdeuterated CNPase catalytic domain was refined at atomic resolution to obtain a detailed view of the active site and the catalytic mechanism. The results specify determinants of ligand binding and novel essential residues required for CNPase catalysis. For example, the aromatic side chains of Phe235 and Tyr168 are crucial for substrate binding, and Arg307 may affect active site electrostatics and regulate loop dynamics. The β5-α7 loop, unique for CNPase in the 2H phosphoesterase family, appears to have various functions in the CNPase reaction mechanism, from coordinating the nucleophilic water molecule to providing a binding pocket for the product and being involved in product release.


    Organizational Affiliation

    Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
2',3'-cyclic-nucleotide 3'-phosphodiesterase
A
220Mus musculusMutation(s): 1 
Gene Names: Cnp (Cnp1)
EC: 3.1.4.37
Find proteins for P16330 (Mus musculus)
Go to UniProtKB:  P16330
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
2AM
Query on 2AM

Download SDF File 
Download CCD File 
A
ADENOSINE-2'-MONOPHOSPHATE
C10 H14 N5 O7 P
QDFHPFSBQFLLSW-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.222 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 40.790α = 90.00
b = 46.510β = 90.00
c = 106.280γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
XSCALEdata scaling
XSCALEdata reduction
Cootmodel building
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-09-23
    Type: Initial release