7X8H

Crystal structure of AtHPPD-(+)-Usnic acid complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.99 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.169 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 

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This is version 1.4 of the entry. See complete history


Literature

Discovery of Subnanomolar Inhibitors of 4-Hydroxyphenylpyruvate Dioxygenase via Structure-Based Rational Design.

Dong, J.Dong, J.Yu, X.H.Yan, Y.C.Nan, J.X.Ye, B.Q.Yang, W.C.Lin, H.Y.Yang, G.F.

(2023) J Agric Food Chem 71: 1170-1177

  • DOI: https://doi.org/10.1021/acs.jafc.2c06727
  • Primary Citation of Related Structures:  
    7X5Y, 7X5Z, 7X62, 7X64, 7X67, 7X69, 7X8H, 7X8I, 7XVH, 8HOW

  • PubMed Abstract: 

    High-potency 4-hydroxyphenylpyruvate dioxygenase (HPPD) inhibitors are usually featured by time-dependent inhibition. However, the molecular mechanism underlying time-dependent inhibition by HPPD inhibitors has not been fully elucidated. Here, based on the determination of the HPPD binding mode of natural products, the π-π sandwich stacking interaction was found to be a critical element determining time-dependent inhibition. This result implied that, for the time-dependent inhibitors, strengthening the π-π sandwich stacking interaction might improve their inhibitory efficacy. Consequently, modification with one methyl group on the bicyclic ring of quinazolindione inhibitors was achieved, thereby strengthening the stacking interaction and significantly improving the inhibitory efficacy. Further introduction of bulkier hydrophobic substituents with higher flexibility resulted in a series of HPPD inhibitors with outstanding subnanomolar potency. Exploration of the time-dependent inhibition mechanism and molecular design based on the exploration results are very successful cases of structure-based rational design and provide a guiding reference for future development of HPPD inhibitors.


  • Organizational Affiliation

    Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P.R. China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
4-hydroxyphenylpyruvate dioxygenase417Arabidopsis thalianaMutation(s): 0 
Gene Names: HPDPDS1At1g06570F12K11.9
EC: 1.13.11.27
UniProt
Find proteins for P93836 (Arabidopsis thaliana)
Explore P93836 
Go to UniProtKB:  P93836
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP93836
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
AIY
Query on AIY

Download Ideal Coordinates CCD File 
C [auth A](9bR)-2,6-diethanoyl-8,9b-dimethyl-3,7,9-tris(oxidanyl)dibenzofuran-1-one
C18 H16 O7
WEYVVCKOOFYHRW-SFHVURJKSA-N
CO
Query on CO

Download Ideal Coordinates CCD File 
B [auth A]COBALT (II) ION
Co
XLJKHNWPARRRJB-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.99 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.169 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.608α = 90
b = 83.973β = 101.99
c = 61.543γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 

Created with Raphaël 2.3.0Worse 01 BetterLigand structure goodness of fit to experimental dataBest fitted AIYClick on this verticalbar to view details

Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China--

Revision History  (Full details and data files)

  • Version 1.0: 2022-06-01
    Type: Initial release
  • Version 1.1: 2023-01-25
    Changes: Database references
  • Version 1.2: 2023-02-01
    Changes: Database references
  • Version 1.3: 2023-11-29
    Changes: Data collection, Refinement description
  • Version 1.4: 2024-10-30
    Changes: Structure summary