1CSM

THE CRYSTAL STRUCTURE OF ALLOSTERIC CHORISMATE MUTASE AT 2.2 ANGSTROMS RESOLUTION

• PDB DOI: https://doi.org/10.2210/pdb1CSM/pdb

• Classification: ISOMERASE
• Organism(s): Saccharomyces cerevisiae
• Mutation(s): No 


• Deposited: 1994-08-22 Released: 1995-09-15 
• Deposition Author(s): Xue, Y., Lipscomb, W.N.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.310 
• R-Value Work: 0.196 
• R-Value Observed: 0.196 

Literature

The crystal structure of allosteric chorismate mutase at 2.2-A resolution.

Xue, Y., Lipscomb, W.N., Graf, R., Schnappauf, G., Braus, G.

(1994) Proc Natl Acad Sci U S A 91: 10814-10818

• PubMed: 7971967 
• DOI: https://doi.org/10.1073/pnas.91.23.10814
• Primary Citation of Related Structures:  
  1CSM


• PubMed Abstract: 
  

  The crystal structure of an allosteric chorismate mutase, the Thr-226-->Ile mutant, from yeast Saccharomyces cerevisiae has been determined to 2.2-A resolution by using the multiple isomorphous replacement method. Solvent-flattening and electron-density modification were applied for phase improvement. The current crystallographic R factor is 0.196. The final model includes 504 of the 512 residues and 97 water molecules. In addition, two tryptophan molecules were identified in the interface between monomers. The overall structure is completely different from the reported structure of chorismate mutase from Bacillus subtilis. This structure showed 71% helices with essentially no beta-sheet structures.

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Organizational Affiliation: 

Gibbs Chemical Laboratory, Harvard University, Cambridge, MA 02138.

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 60.01 kDa 
• Atom Count: 4,275 
• Modelled Residue Count: 504 
• Deposited Residue Count: 512 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CHORISMATE MUTASE	A, B	256	Saccharomyces cerevisiae	Mutation(s): 0  EC: 5.4.99.5
UniProt
Find proteins for P32178 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P32178  Go to UniProtKB:  P32178

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
TRP	C [auth A], D [auth B]	TRYPTOPHAN C11 H12 N2 O2 QIVBCDIJIAJPQS-VIFPVBQESA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.310 
• R-Value Work: 0.196 
• R-Value Observed: 0.196 
• Space Group: P 6₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 95.8	α = 90
b = 95.8	β = 90
c = 157.9	γ = 120

Software Package:

Software Name	Purpose
MSC	data collection
X-PLOR	model building
X-PLOR	refinement
MSC	data reduction
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1995-09-15 
Deposition Author(s): Xue, Y., Lipscomb, W.N.

Revision History  

• Version 1.0: 1995-09-15
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-07
  Changes: Data collection, Database references, Derived calculations, Other