Crystal structure analysis of the ADP-ribose pyrophosphatase of E86Q mutant, complexed with ADP-ribose and Zn

Experimental Data Snapshot

  • Resolution: 1.65 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.217 

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Structural insights into the Thermus thermophilus ADP-ribose pyrophosphatase mechanism via crystal structures with the bound substrate and metal

Yoshiba, S.Ooga, T.Nakagawa, N.Shibata, T.Inoue, Y.Yokoyama, S.Kuramitsu, S.Masui, R.

(2004) J Biol Chem 279: 37163-37174

  • DOI: https://doi.org/10.1074/jbc.M403817200
  • Primary Citation of Related Structures:  
    1V8I, 1V8L, 1V8M, 1V8N, 1V8R, 1V8S, 1V8T, 1V8U, 1V8V, 1V8W, 1V8Y

  • PubMed Abstract: 

    ADP-ribose pyrophosphatase (ADPRase) catalyzes the divalent metal ion-dependent hydrolysis of ADP-ribose to ribose 5'-phosphate and AMP. This enzyme plays a key role in regulating the intracellular ADP-ribose levels, and prevents nonenzymatic ADP-ribosylation. To elucidate the pyrophosphatase hydrolysis mechanism employed by this enzyme, structural changes occurring on binding of substrate, metal and product were investigated using crystal structures of ADPRase from an extreme thermophile, Thermus thermophilus HB8. Seven structures were determined, including that of the free enzyme, the Zn(2+)-bound enzyme, the binary complex with ADP-ribose, the ternary complexes with ADP-ribose and Zn(2+) or Gd(3+), and the product complexes with AMP and Mg(2+) or with ribose 5'-phosphate and Zn(2+). The structural and functional studies suggested that the ADP-ribose hydrolysis pathway consists of four reaction states: bound with metal (I), metal and substrate (II), metal and substrate in the transition state (III), and products (IV). In reaction state II, Glu-82 and Glu-70 abstract a proton from a water molecule. This water molecule is situated at an ideal position to carry out nucleophilic attack on the adenosyl phosphate, as it is 3.6 A away from the target phosphorus and almost in line with the scissile bond.

  • Organizational Affiliation

    Department of Biology, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ADP-ribose pyrophosphatase170Thermus thermophilusMutation(s): 1 
Find proteins for Q84CU3 (Thermus thermophilus)
Explore Q84CU3 
Go to UniProtKB:  Q84CU3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ84CU3
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.65 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.217 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.655α = 90
b = 49.655β = 90
c = 118.473γ = 120
Software Package:
Software NamePurpose
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2004-10-19
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2021-11-10
    Changes: Database references, Derived calculations
  • Version 1.4: 2023-12-27
    Changes: Data collection