Structure of the Type III Pantothenate Kinase (CoaX) from Bacillus Anthracis

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 

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Structure of the Type III Pantothenate Kinase from Bacillus anthracis at 2.0 A Resolution: Implications for Coenzyme A-Dependent Redox Biology.

Nicely, N.I.Parsonage, D.Paige, C.Newton, G.L.Fahey, R.C.Leonardi, R.Jackowski, S.Mallett, T.C.Claiborne, A.

(2007) Biochemistry 46: 3234-3245

  • DOI: https://doi.org/10.1021/bi062299p
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Coenzyme A (CoASH) is the major low-molecular weight thiol in Staphylococcus aureus and a number of other bacteria; the crystal structure of the S. aureus coenzyme A-disulfide reductase (CoADR), which maintains the reduced intracellular state of CoASH, has recently been reported [Mallett, T.C., Wallen, J.R., Karplus, P.A., Sakai, H., Tsukihara, T., and Claiborne, A. (2006) Biochemistry 45, 11278-89]. In this report we demonstrate that CoASH is the major thiol in Bacillus anthracis; a bioinformatics analysis indicates that three of the four proteins responsible for the conversion of pantothenate (Pan) to CoASH in Escherichia coli are conserved in B. anthracis. In contrast, a novel type III pantothenate kinase (PanK) catalyzes the first committed step in the biosynthetic pathway in B. anthracis; unlike the E. coli type I PanK, this enzyme is not subject to feedback inhibition by CoASH. The crystal structure of B. anthracis PanK (BaPanK), solved using multiwavelength anomalous dispersion data and refined at a resolution of 2.0 A, demonstrates that BaPanK is a new member of the Acetate and Sugar Kinase/Hsc70/Actin (ASKHA) superfamily. The Pan and ATP substrates have been modeled into the active-site cleft; in addition to providing a clear rationale for the absence of CoASH inhibition, analysis of the Pan-binding pocket has led to the development of two new structure-based motifs (the PAN and INTERFACE motifs). Our analyses also suggest that the type III PanK in the spore-forming B. anthracis plays an essential role in the novel thiol/disulfide redox biology of this category A biodefense pathogen.

  • Organizational Affiliation

    Center for Structural Biology, Wake Forest University School of Medicine, Winston-Salem, North Carolina 27157, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
BIOSYNTHETIC PROTEINA [auth X]268Bacillus anthracis str. AmesMutation(s): 0 
Find proteins for Q81VX4 (Bacillus anthracis)
Explore Q81VX4 
Go to UniProtKB:  Q81VX4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ81VX4
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on EDO

Download Ideal Coordinates CCD File 
B [auth X]1,2-ETHANEDIOL
C2 H6 O2
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.852α = 90
b = 133.396β = 90
c = 41.138γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
CBASSdata collection
d*TREKdata scaling

Structure Validation

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Entry History 

Deposition Data

  • Released Date: 2007-03-20 
  • Deposition Author(s): Nicely, N.I.

Revision History  (Full details and data files)

  • Version 1.0: 2007-03-20
    Type: Initial release
  • Version 1.1: 2008-04-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Source and taxonomy, Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description
  • Version 1.4: 2024-02-14
    Changes: Data collection, Database references, Derived calculations