1JSC

Crystal Structure of the Catalytic Subunit of Yeast Acetohydroxyacid Synthase: A target for Herbicidal Inhibitors


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.191 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of yeast acetohydroxyacid synthase: a target for herbicidal inhibitors.

Pang, S.S.Duggleby, R.G.Guddat, L.W.

(2002) J Mol Biol 317: 249-262

  • DOI: 10.1006/jmbi.2001.5419
  • Primary Citation of Related Structures:  
    1JSC

  • PubMed Abstract: 
  • Acetohydroxyacid synthase (AHAS; EC 4.1.3.18) catalyzes the first step in branched-chain amino acid biosynthesis. The enzyme requires thiamin diphosphate and FAD for activity, but the latter is unexpected, because the reaction involves no oxidation or reduction ...

    Acetohydroxyacid synthase (AHAS; EC 4.1.3.18) catalyzes the first step in branched-chain amino acid biosynthesis. The enzyme requires thiamin diphosphate and FAD for activity, but the latter is unexpected, because the reaction involves no oxidation or reduction. Due to its presence in plants, AHAS is a target for sulfonylurea and imidazolinone herbicides. Here, the crystal structure to 2.6 A resolution of the catalytic subunit of yeast AHAS is reported. The active site is located at the dimer interface and is near the proposed herbicide-binding site. The conformation of FAD and its position in the active site are defined. The structure of AHAS provides a starting point for the rational design of new herbicides.


    Organizational Affiliation

    Centre for Protein Structure Function and Engineering, Department of Biochemistry and Molecular Biology, School of Molecular and Microbial Sciences, The University of Queensland, Brisbane, QLD 4072, Australia.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ACETOHYDROXY-ACID SYNTHASEA, B630Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: ILV2
EC: 4.1.3.18 (PDB Primary Data), 2.2.1.6 (UniProt)
UniProt
Find proteins for P07342 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P07342 
Go to UniProtKB:  P07342
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD (Subject of Investigation/LOI)
Query on FAD

Download Ideal Coordinates CCD File 
G [auth A], M [auth B]FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
TPP (Subject of Investigation/LOI)
Query on TPP

Download Ideal Coordinates CCD File 
F [auth A], L [auth B]THIAMINE DIPHOSPHATE
C12 H19 N4 O7 P2 S
AYEKOFBPNLCAJY-UHFFFAOYSA-O
 Ligand Interaction
2HP
Query on 2HP

Download Ideal Coordinates CCD File 
E [auth A], J [auth B], K [auth B]DIHYDROGENPHOSPHATE ION
H2 O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-M
 Ligand Interaction
K
Query on K

Download Ideal Coordinates CCD File 
C [auth A], H [auth B]POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
D [auth A], I [auth B]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 95.552α = 90
b = 109.401β = 90
c = 178.858γ = 90
Software Package:
Software NamePurpose
AMoREphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-01-16
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance