Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 186.28 kDa 
• Atom Count: 12607 
• Residue Count: 1596 
• Unique protein chains: 1

3OS6

Crystal structure of putative 2,3-dihydroxybenzoate-specific isochorismate synthase, DhbC from Bacillus anthracis.

• DOI: 10.2210/pdb3OS6/pdb

• Classification: ISOMERASE
• Organism(s): Bacillus anthracis str. Ames
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2010-09-08 Released: 2010-10-20 
• Deposition Author(s): Domagalski, M.J., Chruszcz, M., Skarina, T., Onopriyenko, O., Cymborowski, M., Savchenko, A., Edwards, A., Anderson, W., Minor, W., Center for Structural Genomics of Infectious Diseases (CSGID)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.212 
• R-Value Work: 0.171 
• R-Value Observed: 0.173 

Literature

Structure of isochorismate synthase DhbC from Bacillus anthracis.

Domagalski, M.J., Tkaczuk, K.L., Chruszcz, M., Skarina, T., Onopriyenko, O., Cymborowski, M., Grabowski, M., Savchenko, A., Minor, W.

(2013) Acta Crystallogr Sect F Struct Biol Cryst Commun 69: 956-961

• PubMed: 23989140 
• DOI: 10.1107/S1744309113021246
• Primary Citation of Related Structures:  
  3OS6


• PubMed Abstract: 
  

The isochorismate synthase DhbC from Bacillus anthracis is essential for the biosynthesis of the siderophore bacillibactin by this pathogenic bacterium. The structure of the selenomethionine-substituted protein was determined to 2.4 Å resolution using single-wavelength anomalous diffraction. B. anthracis DhbC bears the strongest resemblance to the Escherichia coli isochorismate synthase EntC, which is involved in the biosynthesis of another siderophore, namely enterobactin. Both proteins adopt the characteristic fold of other chorismate-utilizing enzymes, which are involved in the biosynthesis of various products, including siderophores, menaquinone and tryptophan. The conservation of the active-site residues, as well as their spatial arrangement, suggests that these enzymes share a common Mg(2+)-dependent catalytic mechanism.

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Organizational Affiliation: 

Department of Molecular Physiology and Biological Physics, University of Virginia, 1340 Jefferson Park Avenue, Jordan Hall, Charlottesville, VA 22908, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Isochorismate synthase DhbC	A, B, C, D	399	Bacillus anthracis str. Ames	Mutation(s): 0  Gene Names: BAS2205, BA_2369, dhbC, GBAA2369, GBAA_2369 EC: 5.4.4.2
Find proteins for Q81QQ0 (Bacillus anthracis) Explore Q81QQ0  Go to UniProtKB:  Q81QQ0

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
15P	A, D	POLYETHYLENE GLYCOL (N=34) C69 H140 O35 VUYXVWGKCKTUMF-UHFFFAOYSA-N
SO4	A, B, C, D	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
GOL	A, B, C, D	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A,B,C,D	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.212 
• R-Value Work: 0.171 
• R-Value Observed: 0.173 
• Space Group: P 2₁ 3
• Diffraction Data DOI: 10.18430/M3KK5Z Protein Diffraction

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 201.389	α = 90
b = 201.389	β = 90
c = 201.389	γ = 90

Software Package:

Software Name	Purpose
HKL-3000	data collection
HKL-3000	phasing
SHELXE	model building
MLPHARE	phasing
DM	model building
RESOLVE	model building
ARP/wARP	model building
CCP4	model building
REFMAC	refinement
Coot	model building
HKL-3000	data reduction
HKL-3000	data scaling
DM	phasing
RESOLVE	phasing
CCP4	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-09-08 
• Released Date: 2010-10-20 
Deposition Author(s): Domagalski, M.J., Chruszcz, M., Skarina, T., Onopriyenko, O., Cymborowski, M., Savchenko, A., Edwards, A., Anderson, W., Minor, W., Center for Structural Genomics of Infectious Diseases (CSGID)

Revision History 

• Version 1.0: 2010-10-20
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2013-09-11
  Changes: Database references