2CSM

TYR-BOUND T-STATE OF YEAST CHORISMATE MUTASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.321 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.213 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of the T state of allosteric yeast chorismate mutase and comparison with the R state.

Strater, N.Hakansson, K.Schnappauf, G.Braus, G.Lipscomb, W.N.

(1996) Proc Natl Acad Sci U S A 93: 3330-3334

  • DOI: 10.1073/pnas.93.8.3330
  • Primary Citation of Related Structures:  
    2CSM

  • PubMed Abstract: 
  • The crystal structure of the tyrosine-bound T state of allosteric yeast Saccharomyces cerevisiae chorismate mutase was solved by molecular replacement at a resolution of 2.8 angstroms using a monomer of the R-state structure as the search model. The allosteric inhibitor tyrosine was found to bind in the T state at the same binding site as the allosteric activator tryptophan binds in the R state, thus defining one regulatory binding site for each monomer ...

    The crystal structure of the tyrosine-bound T state of allosteric yeast Saccharomyces cerevisiae chorismate mutase was solved by molecular replacement at a resolution of 2.8 angstroms using a monomer of the R-state structure as the search model. The allosteric inhibitor tyrosine was found to bind in the T state at the same binding site as the allosteric activator tryptophan binds in the R state, thus defining one regulatory binding site for each monomer. Activation by tryptophan is caused by the larger steric size of its side chain, thereby pushing apart the allosteric domain of one monomer and helix H8 of the catalytic domain of the other monomer. Inhibition is caused by polar contacts of tyrosine with Arg-75 and Arg-76 of one monomer and with Gly-141, Ser-142, and Thr-145 of the other monomer, thereby bringing the allosteric and catalytic domains closer together. The allosteric transition includes an 8 degree rotation of each of the two catalytic domains relative to the allosteric domains of each monomer (domain closure). Alternatively, this transition can be described as a 15 degree rotation of the catalytic domains of the dimer relative to each other.


    Related Citations: 
    • Location of the Active Site of Allosteric Chorismate Mutase from Saccharomyces Cerevisiae, and Comments on the Catalytic and Regulatory Mechanisms
      Xue, Y., Lipscomb, W.N.
      (1995) Proc Natl Acad Sci U S A 92: 10595
    • 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

    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CHORISMATE MUTASEA256Saccharomyces cerevisiaeMutation(s): 0 
EC: 5.4.99.5
UniProt
Find proteins for P32178 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P32178 
Go to UniProtKB:  P32178
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP32178
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TYR
Query on TYR

Download Ideal Coordinates CCD File 
B [auth A]TYROSINE
C9 H11 N O3
OUYCCCASQSFEME-QMMMGPOBSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
TYR PDBBind:  2CSM Ki: 5.00e+4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.321 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.213 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.6α = 90
b = 78.6β = 90
c = 116.1γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
XDSdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-12-23
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance