Crystal structure of human ADP-ribose pyrophosphatase NUDT5 in complex with magnesium and ADP-ribose

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.193 

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Crystal Structures of Human NUDT5 Reveal Insights into the Structural Basis of the Substrate Specificity

Zha, M.Zhong, C.Peng, Y.Hu, H.Ding, J.

(2006) J Mol Biol 364: 1021-1033

  • DOI: https://doi.org/10.1016/j.jmb.2006.09.078
  • Primary Citation of Related Structures:  
    2DSB, 2DSC, 2DSD

  • PubMed Abstract: 

    Human NUDT5 (hNUDT5) is an ADP-ribose pyrophosphatase (ADPRase) belonging to the Nudix hydrolase superfamily. It presumably plays important roles in controlling the intracellular level of ADP-ribose (ADPR) to prevent non-enzymatic ADP-ribosylation by hydrolyzing ADPR to AMP and ribose 5'-phosphate. We report here the crystal structures of hNUDT5 in apo form, in complex with ADPR, and in complex with AMP with bound Mg2+. hNUDT5 forms a homodimer with substantial domain swapping and assumes a structure more similar to Escherichia coli ADPRase ORF209 than human ADPRase NUDT9. The adenine moiety of the substrates is specifically recognized by the enzyme via hydrogen-bonding interactions between N1 and N6 of the base and Glu47 of one subunit, and between N7 of the base and Arg51 of the other subunit, providing the molecular basis for the high selectivity of hNUDT5 for ADP-sugars over other sugar nucleotides. Structural comparisons with E. coli ADPRase ORF209 and ADPXase ORF186 indicate that the existence of an aromatic residue on loop L8 in ORF186 seems to be positively correlated with its enzymatic activity on APnA, whereas hNUDT5 and ORF209 contain no such residue and thus have low or no activities on APnA.

  • Organizational Affiliation

    State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ADP-sugar pyrophosphatase
A, B
212Homo sapiensMutation(s): 0 
Gene Names: NUDT5
EC: (PDB Primary Data), 3.6.1 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UKK9 (Homo sapiens)
Explore Q9UKK9 
Go to UniProtKB:  Q9UKK9
GTEx:  ENSG00000165609 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UKK9
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.193 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 112.466α = 90
b = 40.623β = 121.44
c = 99.685γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-11-14
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-10-25
    Changes: Data collection, Database references, Derived calculations, Refinement description