1HFB

Crystal structure of the tyrosine-regulated 3-deoxy-D-arabino-heptulosonate-7-phosphate synthase from Saccharomyces cerevisiae complexed with phosphoenolpyruvate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Evolution of Feedback-Inhibited Beta /Alpha Barrel Isoenzymes by Gene Duplication and a Single Mutation

Hartmann, M.Schneider, T.R.Pfeil, A.Heinrich, G.Lipscomb, W.Braus, G.H.

(2003) Proc.Natl.Acad.Sci.USA 100: 862

  • DOI: 10.1073/pnas.0337566100
  • Also Cited By: 1OF6, 1OF8, 1OFA, 1OFB, 1OFO, 1OFP, 1OFQ, 1OG0

  • PubMed Abstract: 
  • The betaalpha barrel is the common protein fold of numerous enzymes and was proposed recently to be the result of gene duplication and fusion of an ancient half-barrel. The initial enzyme of shikimate biosynthesis possesses the additional feature of ...

    The betaalpha barrel is the common protein fold of numerous enzymes and was proposed recently to be the result of gene duplication and fusion of an ancient half-barrel. The initial enzyme of shikimate biosynthesis possesses the additional feature of feedback regulation. The crystal structure and kinetic studies on chimera and mutant proteins of yeast 3-deoxy-d-arabino-heptulosonate-7-phosphate (DAHP) synthase from Saccharomyces cerevisiae inhibited by phenylalanine (Aro3p) and DAHP synthase S. cerevisiae inhibited by tyrosine (Aro4p) give insight into important regions for regulation in the enzyme: The loop, which is connecting the two half-barrels, and structural elements added to the barrel are prerequisites for regulation and form a cavity on the N-terminal side of the betaalpha barrel. In the cavity of Aro4p at position 226 is a glycine residue, which is highly conserved in all other tyrosine-regulated DAHP synthases as well. Sequence alignments with phenylalanine-regulated DAHP synthases including Aro3p show a highly conserved serine residue at this position. An exchange of glycine to serine and vice versa leads to a complete change in the regulation pattern. Therefore the evolution of these differently feedback-inhibited isoenzymes required gene duplication and a single mutation within the internal extra element. Numerous additional amino acid substitutions present in the contemporary isoenzymes are irrelevant for regulation and occurred independently.


    Organizational Affiliation

    Institut für Mikrobiologie and Genetik and Abteilung für Strukturchemie, Georg August Universität, D-37077 Göttingen, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TYROSINE-REGULATED 3-DEOXY-D-ARABINO-HEPTULOSONATE-7-PHOSPHATE SYNTHASE
A, B, C, D, E, F, G, H
370Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: ARO4
EC: 2.5.1.54
Find proteins for P32449 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P32449
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PEP
Query on PEP

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
PHOSPHOENOLPYRUVATE
C3 H5 O6 P
DTBNBXWJWCWCIK-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.208 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 82.000α = 65.60
b = 93.800β = 85.60
c = 104.500γ = 75.40
Software Package:
Software NamePurpose
CNSrefinement
SCALEPACKdata scaling
EPMRphasing
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-01-14
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance