4EPP

Canonical poly(ADP-ribose) glycohydrolase from Tetrahymena thermophila.

• PDB DOI: https://doi.org/10.2210/pdb4EPP/pdb

• Classification: HYDROLASE
• Organism(s): Tetrahymena thermophila
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2012-04-17 Released: 2012-06-20 
• Deposition Author(s): Dunstan, M.S., Leys, D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.207 
• R-Value Work: 0.167 
• R-Value Observed: 0.169 

Literature

Structure and mechanism of a canonical poly(ADP-ribose) glycohydrolase.

Dunstan, M.S., Barkauskaite, E., Lafite, P., Knezevic, C.E., Brassington, A., Ahel, M., Hergenrother, P.J., Leys, D., Ahel, I.

(2012) Nat Commun 3: 878-878

• PubMed: 22673905 
• DOI: https://doi.org/10.1038/ncomms1889
• Primary Citation of Related Structures:  
  4EPP, 4EPQ


• PubMed Abstract: 
  

  Poly(ADP-ribosyl)ation is a reversible post-translational protein modification involved in the regulation of a number of cellular processes including DNA repair, chromatin structure, mitosis, transcription, checkpoint activation, apoptosis and asexual development. The reversion of poly(ADP-ribosyl)ation is catalysed by poly(ADP-ribose) (PAR) glycohydrolase (PARG), which specifically targets the unique PAR (1''-2') ribose-ribose bonds. Here we report the structure and mechanism of the first canonical PARG from the protozoan Tetrahymena thermophila. In addition, we reveal the structure of T. thermophila PARG in a complex with a novel rhodanine-containing mammalian PARG inhibitor RBPI-3. Our data demonstrate that the protozoan PARG represents a good model for human PARG and is therefore likely to prove useful in guiding structure-based discovery of new classes of PARG inhibitors.

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Organizational Affiliation: 

Manchester Interdisciplinary Biocentre, Princess Street 131, M1 7DN, Manchester, UK.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 112.89 kDa 
• Atom Count: 8,308 
• Modelled Residue Count: 878 
• Deposited Residue Count: 954 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Poly(ADP-ribose) glycohydrolase	A, B	477	Tetrahymena thermophila	Mutation(s): 0  EC: 3.2.1.143
UniProt
Find proteins for I6L8L8 (Tetrahymena thermophila) Explore I6L8L8  Go to UniProtKB:  I6L8L8

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
APR	C [auth A], D [auth B]	ADENOSINE-5-DIPHOSPHORIBOSE C15 H23 N5 O14 P2 SRNWOUGRCWSEMX-KEOHHSTQSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.207 
• R-Value Work: 0.167 
• R-Value Observed: 0.169 
• Space Group: P 4₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 112.7	α = 90
b = 112.7	β = 90
c = 88.6	γ = 90

Software Package:

Software Name	Purpose
SOLVE	phasing
PDB_EXTRACT	data extraction
ADSC	data collection
XDS	data reduction
XDS	data scaling
PHENIX	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-06-20 
Deposition Author(s): Dunstan, M.S., Leys, D.

Revision History  

• Version 1.0: 2012-06-20
  Type: Initial release
  
• Version 1.1: 2024-02-28
  Changes: Data collection, Database references, Derived calculations