1TT8

CHORISMATE LYASE WITH PRODUCT, 1.0 A RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1 Å
  • R-Value Free: 0.153 
  • R-Value Work: 0.123 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural analysis of ligand binding and catalysis in chorismate lyase.

Smith, N.Roitberg, A.E.Rivera, E.Howard, A.Holden, M.J.Mayhew, M.Kaistha, S.Gallagher, D.T.

(2006) Arch.Biochem.Biophys. 445: 72-80

  • DOI: 10.1016/j.abb.2005.10.026
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Chorismate lyase (CL) removes the pyruvyl group from chorismate to provide 4-hydroxybenzoate (4HB) for the ubiquinone pathway. We previously reported the crystal structure at 1.4A resolution of the Escherichia coli CL with bound 4HB product, showing ...

    Chorismate lyase (CL) removes the pyruvyl group from chorismate to provide 4-hydroxybenzoate (4HB) for the ubiquinone pathway. We previously reported the crystal structure at 1.4A resolution of the Escherichia coli CL with bound 4HB product, showing that the product is bound in an internal cavity behind two flaps. To provide a more complete basis for understanding CL's unusual ligand-binding properties and mechanism of action, we now report four crystal structures of CL mutants and inhibitor complexes, together with binding and activity measurements and molecular dynamics simulations. First, an ultrahigh resolution (1.0A) crystal structure of the CL*product complex reveals details of a substrate-sized internal cavity, also behind the flaps, near the product site. Second, a 2.4A structure of CL complexed with the inhibitor vanillate shows the flaps partly opened relative to their product-bound positions. Third, a 2.0A structure of the G90A mutant with bound product reveals the basis for tighter product binding and kinetic effects of this active site mutation. Fourth, the combination of the G90A mutation with the vanillate inhibitor produces a 1.9A structure containing two inhibitor molecules, one in the product site and the other in the adjacent cavity. The two sites are connected by a short tunnel that is partly open at each end, suggesting that CL may operate via a 2-site or tunnel mechanism.


    Organizational Affiliation

    University of Maryland Biotechnology Institute, Rockville, MD 20850, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Chorismate-pyruvate lyase
A
164Escherichia coli (strain K12)Mutations: S14C, S81C
Gene Names: ubiC
EC: 4.1.3.40
Find proteins for P26602 (Escherichia coli (strain K12))
Go to UniProtKB:  P26602
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PHB
Query on PHB

Download SDF File 
Download CCD File 
A
P-HYDROXYBENZOIC ACID
C7 H6 O3
FJKROLUGYXJWQN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1 Å
  • R-Value Free: 0.153 
  • R-Value Work: 0.123 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 31.315α = 67.57
b = 33.849β = 87.83
c = 39.776γ = 65.66
Software Package:
Software NamePurpose
SHELXL-97refinement
X-GENdata reduction
SHELXphasing
SHELXmodel building
X-GENdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-12-28
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description