Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

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

Macromolecule Content

• Total Structure Weight: 160.62 kDa 
• Atom Count: 11756 
• Residue Count: 1460 
• Unique protein chains: 1

1UMF

crystal structure of chorismate synthase

• DOI: 10.2210/pdb1UMF/pdb

• Classification: LYASE
• Organism(s): Helicobacter pylori
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2003-09-30 Released: 2004-06-01 
• Deposition Author(s): Ahn, H.J., Yoon, H.J., Lee, B., Suh, S.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Free: 0.248 
• R-Value Work: 0.202 
• R-Value Observed: 0.202 

Literature

Crystal structure of chorismate synthase: a novel FMN-binding protein fold and functional insights

Ahn, H.J., Yoon, H.J., Lee, B., Suh, S.W.

(2004) J Mol Biol 336: 903-915

• PubMed: 15095868 
• DOI: 10.1016/j.jmb.2003.12.072
• Primary Citation of Related Structures:  
  1UMF, 1UM0


• PubMed Abstract: 
  

Chorismate synthase catalyzes the conversion of 5-enolpyruvylshikimate 3-phosphate to chorismate in the shikimate pathway, which represents an attractive target for discovering antimicrobial agents and herbicides. Chorismate serves as a common precursor for the synthesis of aromatic amino acids and many aromatic compounds in microorganisms and plants. Chorismate synthase requires reduced FMN as a cofactor but the catalyzed reaction involves no net redox change. Here, we have determined the crystal structure of chorismate synthase from Helicobacter pylori in both FMN-bound and FMN-free forms. It is a tetrameric enzyme, with each monomer possessing a novel "beta-alpha-beta sandwich fold". Highly conserved regions, including several flexible loops, cluster together around the bound FMN to form the active site. The unique FMN-binding site is formed largely by a single subunit, with a small contribution from a neighboring subunit. The isoalloxazine ring of the bound FMN is significantly non-planar. Our structure illuminates the essential functional roles played by the cofactor.

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Organizational Affiliation: 

Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-0742, South Korea.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Chorismate synthase	A, B, C, D	365	Helicobacter pylori	Mutation(s): 0  EC: 4.2.3.5
Find proteins for P56122 (Helicobacter pylori (strain ATCC 700392 / 26695)) Explore P56122  Go to UniProtKB:  P56122

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Free: 0.248 
• R-Value Work: 0.202 
• R-Value Observed: 0.202 
• Space Group: I 4

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 146.478	α = 90
b = 146.478	β = 90
c = 132.064	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-09-30 
• Released Date: 2004-06-01 
Deposition Author(s): Ahn, H.J., Yoon, H.J., Lee, B., Suh, S.W.

Revision History 

• Version 1.0: 2004-06-01
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance