5FEM

Saccharomyces cerevisiae Acetohydroxyacid Synthase in complex with bensulfuron methyl


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.168 Å
  • R-Value Free: 0.173 
  • R-Value Work: 0.150 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Commercial Herbicides Can Trigger the Oxidative Inactivation of Acetohydroxyacid Synthase.

Lonhienne, T.Nouwens, A.Williams, C.M.Fraser, J.A.Lee, Y.T.West, N.P.Guddat, L.W.

(2016) Angew.Chem.Int.Ed.Engl. 55: 4247-4251

  • DOI: 10.1002/anie.201511985

  • PubMed Abstract: 
  • Acetohydroxyacid synthase (AHAS) inhibitors are highly successful commercial herbicides. New kinetic data show that the binding of these compounds leads to reversible accumulative inhibition of AHAS. Crystallographic data (to a resolution of 2.17 Å) ...

    Acetohydroxyacid synthase (AHAS) inhibitors are highly successful commercial herbicides. New kinetic data show that the binding of these compounds leads to reversible accumulative inhibition of AHAS. Crystallographic data (to a resolution of 2.17 Å) for an AHAS-herbicide complex shows that closure of the active site occurs when the herbicidal inhibitor binds, thus preventing exchange with solvent. This feature combined with new kinetic data shows that molecular oxygen promotes an accumulative inhibition leading to the conclusion that the exceptional potency of these herbicides is augmented by subversion of an inherent oxygenase side reaction. The reactive oxygen species produced by this reaction are trapped in the active site, triggering oxidation reactions that ultimately lead to the alteration of the redox state of the cofactor flavin adenine dinucleotide (FAD), a feature that accounts for the observed reversible accumulative inhibition.


    Organizational Affiliation

    School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, 4072 QLD, Australia.,School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, 4072 QLD, Australia. luke.guddat@uq.edu.au.,School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, 4072 QLD, Australia. t.lonhienne@uq.edu.au.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Acetolactate synthase catalytic subunit, mitochondrial
A, B
677Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: ILV2 (SMR1)
EC: 2.2.1.6
Find proteins for P07342 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P07342
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TPP
Query on TPP

Download SDF File 
Download CCD File 
A, B
THIAMINE DIPHOSPHATE
C12 H19 N4 O7 P2 S
AYEKOFBPNLCAJY-UHFFFAOYSA-O
 Ligand Interaction
FAD
Query on FAD

Download SDF File 
Download CCD File 
A, B
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
60G
Query on 60G

Download SDF File 
Download CCD File 
A, B
methyl 2-[(4,6-dimethoxypyrimidin-2-yl)carbamoylsulfamoylmethyl]benzoate
Bensulfuron methyl
C16 H18 N4 O7 S
XMQFTWRPUQYINF-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
60GKi: 4.4 nM (100) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.168 Å
  • R-Value Free: 0.173 
  • R-Value Work: 0.150 
  • Space Group: P 4 2 2
Unit Cell:
Length (Å)Angle (°)
a = 154.673α = 90.00
b = 154.673β = 90.00
c = 178.385γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling
PHENIXphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Health and Medical Research Council (NHMRC, Australia)Australia1087713

Revision History 

  • Version 1.0: 2016-03-16
    Type: Initial release
  • Version 1.1: 2016-04-06
    Type: Database references
  • Version 1.2: 2017-09-27
    Type: Author supporting evidence, Data collection, Database references, Derived calculations
  • Version 1.3: 2018-05-23
    Type: Data collection, Structure summary
  • Version 1.4: 2020-01-08
    Type: Author supporting evidence