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 
  • R-Value Observed: 0.180 

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:  
    2VKL, 2W1A, 2W19

  • 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-site residues ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
3-DEOXY-D-ARABINO-HEPTULOSONATE 7-PHOSPHATE SYNTHASE AROGA, B472Mycobacterium tuberculosis H37RvMutation(s): 0 
Gene Names: aroGRv2178c
EC: 2.5.1.54
UniProt
Find proteins for O53512 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore O53512 
Go to UniProtKB:  O53512
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
CHORISMATE MUTASEC, D90Mycobacterium tuberculosis H37RvMutation(s): 0 
Gene Names: Rv0948cMTCY10D7.26
EC: 5.4.99.5
UniProt
Find proteins for P9WIC1 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WIC1 
Go to UniProtKB:  P9WIC1
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.180 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 204.018α = 90
b = 204.018β = 90
c = 66.513γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

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