2W19

Non-covalent complex between dahp synthase and chorismate mutase from Mycobacterium tuberculosis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.178 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure and Function of a Complex between Chorismate Mutase and Dahp Synthase: Efficiency Boost for the Junior Partner.

Sasso, S.Okvist, M.Roderer, K.Gamper, M.Codoni, G.Krengel, U.Kast, P.

(2009) Embo J. 28: 2128

  • DOI: 10.1038/emboj.2009.165
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Chorismate mutase catalyzes a key step in the shikimate biosynthetic pathway towards phenylalanine and tyrosine. Curiously, the intracellular chorismate mutase of Mycobacterium tuberculosis (MtCM; Rv0948c) has poor activity and lacks prominent active ...

    Chorismate mutase catalyzes a key step in the shikimate biosynthetic pathway towards phenylalanine and tyrosine. Curiously, the intracellular chorismate mutase of Mycobacterium tuberculosis (MtCM; Rv0948c) has poor activity and lacks prominent active-site residues. However, its catalytic efficiency increases >100-fold on addition of DAHP synthase (MtDS; Rv2178c), another shikimate-pathway enzyme. The 2.35 A crystal structure of the MtCM-MtDS complex bound to a transition-state analogue shows a central core formed by four MtDS subunits sandwiched between two MtCM dimers. Structural comparisons imply catalytic activation to be a consequence of the repositioning of MtCM active-site residues on binding to MtDS. The mutagenesis of the C-terminal extrusion of MtCM establishes conserved residues as part of the activation machinery. The chorismate-mutase activity of the complex, but not of MtCM alone, is inhibited synergistically by phenylalanine and tyrosine. The complex formation thus endows the shikimate pathway of M. tuberculosis with an important regulatory feature. Experimental evidence suggests that such non-covalent enzyme complexes comprising an AroQ(delta) subclass chorismate mutase like MtCM are abundant in the bacterial order Actinomycetales.


    Organizational Affiliation

    Laboratory of Organic Chemistry, ETH Zurich, CH-8093 Zurich, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
3-DEOXY-D-ARABINO-HEPTULOSONATE 7-PHOSPHATE SYNTHASE AROG
A, B
472Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Mutation(s): 0 
Gene Names: aroG
EC: 2.5.1.54
Find proteins for O53512 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  O53512
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CHORISMATE MUTASE
C, D
90Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)Mutation(s): 0 
EC: 5.4.99.5
Find proteins for P9WIC1 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Go to UniProtKB:  P9WIC1
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, B
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.178 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 204.018α = 90.00
b = 204.018β = 90.00
c = 66.513γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
PHASERphasing
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-07-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance