3EVO

Crystal structure of the Mimivirus NDK +Kpn mutant complexed with dTDP

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.160 

wwPDB Validation 3D Report Full Report


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

Literature

Dissecting the unique nucleotide specificity of mimivirus nucleoside diphosphate kinase.

Jeudy, S., Lartigue, A., Claverie, J.M., Abergel, C.

(2009) J.Virol. 83: 7142-7150

  • DOI: 10.1128/JVI.00511-09
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • The analysis of the Acanthamoeba polyphaga mimivirus genome revealed the first virus-encoded nucleoside diphosphate kinase (NDK), an enzyme that is central to the synthesis of RNA and DNA, ubiquitous in cellular organisms, and well conserved among th ...

    The analysis of the Acanthamoeba polyphaga mimivirus genome revealed the first virus-encoded nucleoside diphosphate kinase (NDK), an enzyme that is central to the synthesis of RNA and DNA, ubiquitous in cellular organisms, and well conserved among the three domains of life. In contrast with the broad specificity of cellular NDKs for all types of ribo- and deoxyribonucleotides, the mimivirus enzyme exhibits a strongly preferential affinity for deoxypyrimidines. In order to elucidate the molecular basis of this unique substrate specificity, we determined the three-dimensional (3D) structure of the Acanthamoeba polyphaga mimivirus NDK alone and in complex with various nucleotides. As predicted from a sequence comparison with cellular NDKs, the 3D structure of the mimivirus enzyme exhibits a shorter Kpn loop, previously recognized as a main feature of the NDK active site. The structure of the viral enzyme in complex with various nucleotides also pinpointed two residue changes, both located near the active site and specific to the viral NDK, which could explain its stronger affinity for deoxynucleotides and pyrimidine nucleotides. The role of these residues was explored by building a set of viral NDK variants, assaying their enzymatic activities, and determining their 3D structures in complex with various nucleotides. A total of 26 crystallographic structures were determined at resolutions ranging from 2.8 A to 1.5 A. Our results suggest that the mimivirus enzyme progressively evolved from an ancestral NDK under the constraints of optimizing its efficiency for the replication of an AT-rich (73%) viral genome in a thymidine-limited host environment.

    Organizational Affiliation: 

    Structural and Genomic Information Laboratory, CNRS-UPR2589, IFR88, Marseille Cedex 9, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Nucleoside diphosphate kinase
A, B
146Acanthamoeba polyphaga mimivirusMutation(s): 0 
Gene Names: NDK
EC: 2.7.4.6
Find proteins for Q5UQL3 (Acanthamoeba polyphaga mimivirus)
Go to UniProtKB:  Q5UQL3
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TYD
Query on TYD
Download SDF File 
Download CCD File 
A, B
THYMIDINE-5'-DIPHOSPHATE
C10 H16 N2 O11 P2
UJLXYODCHAELLY-XLPZGREQSA-N
 Ligand Interaction
MG
Query on MG
Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.160 
  • Space Group: P 63
Unit Cell:
Length (Å)Angle (°)
a = 69.759α = 90.00
b = 69.759β = 90.00
c = 103.262γ = 120.00
Software Package:
Software NamePurpose
AMoREphasing
REFMACrefinement
ADSCdata collection
MOSFLMdata reduction
SCALAdata scaling
PHENIXrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-08-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance