E. coli dihydroorotate dehydrogenase bound to the inhibitor HQNO

Experimental Data Snapshot

  • Resolution: 2.25 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.217 

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This is version 1.2 of the entry. See complete history


Structural insights into inhibition of the drug target dihydroorotate dehydrogenase by bacterial hydroxyalkylquinolines.

Horwitz, S.M.Blue, T.C.Ambarian, J.A.Hoshino, S.Seyedsayamdost, M.R.Davis, K.M.

(2022) RSC Chem Biol 3: 420-425

  • DOI: https://doi.org/10.1039/d1cb00255d
  • Primary Citation of Related Structures:  
    7T5K, 7T5Y, 7T6C, 7T6H

  • PubMed Abstract: 

    Hydroxyalkylquinolines (HAQs) are ubiquitious natural products but their interactions with associated protein targets remain elusive. We report X-ray crystal structures of two HAQs in complex with dihydroorotate dehydrogenase (DHODH). Our results reveal the structural basis of DHODH inhibition by HAQs and open the door to downstream structure-activity relationship studies.

  • Organizational Affiliation

    Department of Chemistry, Emory University Atlanta GA 30322 USA katherine.davis@emory.edu.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Dihydroorotate dehydrogenase (quinone)
A, B
368Escherichia coli K-12Mutation(s): 0 
Gene Names: pyrDb0945JW0928
Find proteins for P0A7E1 (Escherichia coli (strain K12))
Explore P0A7E1 
Go to UniProtKB:  P0A7E1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A7E1
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.25 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.217 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 104.046α = 90
b = 169.328β = 90
c = 129.97γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2022-03-02
    Type: Initial release
  • Version 1.1: 2022-06-29
    Changes: Database references
  • Version 1.2: 2023-10-18
    Changes: Data collection, Refinement description