2V8P

IspE in complex with ADP and CDP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Characterization of Aquifex Aeolicus 4-Diphosphocytidyl-2C-Methyl-D-Erythritol Kinase -Ligand Recognition in a Template for Antimicrobial Drug Discovery.

Sgraja, T.Alphey, M.S.Ghilagaber, S.Marquez, R.Robertson, M.N.Hemmings, J.L.Lauw, S.Rohdich, F.Bacher, A.Eisenreich, W.Illarionova, V.Hunter, W.N.

(2008) FEBS J. 275: 2779

  • DOI: 10.1111/j.1742-4658.2008.06418.x
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • 4-Diphosphocytidyl-2C-methyl-D-erythritol kinase (IspE) catalyses the ATP-dependent conversion of 4-diphosphocytidyl-2C-methyl-D-erythritol (CDPME) to 4-diphosphocytidyl-2C-methyl-d-erythritol 2-phosphate with the release of ADP. This reaction occurs ...

    4-Diphosphocytidyl-2C-methyl-D-erythritol kinase (IspE) catalyses the ATP-dependent conversion of 4-diphosphocytidyl-2C-methyl-D-erythritol (CDPME) to 4-diphosphocytidyl-2C-methyl-d-erythritol 2-phosphate with the release of ADP. This reaction occurs in the non-mevalonate pathway of isoprenoid precursor biosynthesis and because it is essential in important microbial pathogens and absent from mammals it represents a potential target for anti-infective drugs. We set out to characterize the biochemical properties, determinants of molecular recognition and reactivity of IspE and report the cloning and purification of recombinant Aquifex aeolicus IspE (AaIspE), kinetic data, metal ion, temperature and pH dependence, crystallization and structure determination of the enzyme in complex with CDP, CDPME and ADP. In addition, 4-fluoro-3,5-dihydroxy-4-methylpent-1-enylphosphonic acid (compound 1) was designed to mimic a fragment of the substrate, a synthetic route to 1 was elucidated and the complex structure determined. Surprisingly, this ligand occupies the binding site for the ATP alpha-phosphate not the binding site for the methyl-D-erythritol moiety of CDPME. Gel filtration and analytical ultracentrifugation indicate that AaIspE is a monomer in solution. The enzyme displays the characteristic alpha/beta galacto-homoserine-mevalonate-phosphomevalonate kinase fold, with the catalytic centre positioned in a deep cleft between the ATP- and CDPME-binding domains. Comparisons indicate a high degree of sequence conservation on the IspE active site across bacterial species, similarities in structure, specificity of substrate recognition and mechanism. The biochemical characterization, attainment of well-ordered and reproducible crystals and the models resulting from the analyses provide reagents and templates to support the structure-based design of broad-spectrum antimicrobial agents.


    Organizational Affiliation

    Division of Biological Chemistry and Drug Discovery, University of Dundee, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
4-DIPHOSPHOCYTIDYL-2-C-METHYL-D-ERYTHRITOL KINASE
A, B
271Aquifex aeolicus (strain VF5)Mutation(s): 0 
Gene Names: ispE
EC: 2.7.1.148
Find proteins for O67060 (Aquifex aeolicus (strain VF5))
Go to UniProtKB:  O67060
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ADP
Query on ADP

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Download CCD File 
A, B
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
CDP
Query on CDP

Download SDF File 
Download CCD File 
A, B
CYTIDINE-5'-DIPHOSPHATE
C9 H15 N3 O11 P2
ZWIADYZPOWUWEW-XVFCMESISA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.208 
  • Space Group: P 21 3
Unit Cell:
Length (Å)Angle (°)
a = 137.055α = 90.00
b = 137.055β = 90.00
c = 137.055γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
MOLREPphasing
MOSFLMdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-08-21
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance