2QMX

The crystal structure of L-Phe inhibited prephenate dehydratase from Chlorobium tepidum TLS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structures of open (R) and close (T) states of prephenate dehydratase (PDT) - implication of allosteric regulation by L-phenylalanine.

Tan, K.Li, H.Zhang, R.Gu, M.Clancy, S.T.Joachimiak, A.

(2008) J.Struct.Biol. 162: 94-107

  • DOI: 10.1016/j.jsb.2007.11.009
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The enzyme prephenate dehydratase (PDT) converts prephenate to phenylpyruvate in L-phenylalanine biosynthesis. PDT is allosterically regulated by L-Phe and other amino acids. We report the first crystal structures of PDT from Staphylococcus aureus in ...

    The enzyme prephenate dehydratase (PDT) converts prephenate to phenylpyruvate in L-phenylalanine biosynthesis. PDT is allosterically regulated by L-Phe and other amino acids. We report the first crystal structures of PDT from Staphylococcus aureus in a relaxed (R) state and PDT from Chlorobium tepidum in a tense (T) state. The two enzymes show low sequence identity (27.3%) but the same prototypic architecture and domain organization. Both enzymes are tetramers (dimer of dimers) in crystal and solution while a PDT dimer can be regarded as a basic catalytic unit. The N-terminal PDT domain consists of two similar subdomains with a cleft in between, which hosts the highly conserved active site. In one PDT dimer two clefts are aligned to form an extended active site across the dimer interface. Similarly at the interface two ACT regulatory domains create two highly conserved pockets. Upon binding of the L-Phe inside the pockets, PDT transits from an open to a closed conformation.


    Organizational Affiliation

    Midwest Center for Structural Genomics and Structural Biology Center, Biosciences Division, Building 202, Room A125 9700, S. Cass Avenue, Argonne National Laboratory, Argonne, IL 60439, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Prephenate dehydratase
A, B
283Chlorobaculum tepidum (strain ATCC 49652 / DSM 12025 / NBRC 103806 / TLS)Mutation(s): 0 
Gene Names: pheA
EC: 4.2.1.51
Find proteins for Q8KBW6 (Chlorobaculum tepidum (strain ATCC 49652 / DSM 12025 / NBRC 103806 / TLS))
Go to UniProtKB:  Q8KBW6
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACT
Query on ACT

Download SDF File 
Download CCD File 
A
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
PHE
Query on PHE

Download SDF File 
Download CCD File 
A
PHENYLALANINE
C9 H11 N O2
COLNVLDHVKWLRT-QMMMGPOBSA-N
 Ligand Interaction
EDO
Query on EDO

Download SDF File 
Download CCD File 
A, B
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.219 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 86.870α = 90.00
b = 127.886β = 90.00
c = 56.595γ = 90.00
Software Package:
Software NamePurpose
HKL-3000data reduction
HKL-3000data scaling
REFMACrefinement
SBC-Collectdata collection
MLPHAREphasing
HKL-3000phasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-08-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance