6AJ5 | pdb_00006aj5

Crystal structure of ligand-free type DHODH from Eimeria tenella

• PDB DOI: https://doi.org/10.2210/pdb6AJ5/pdb

• Classification: MEMBRANE PROTEIN
• Organism(s): Eimeria tenella
• Expression System: Escherichia coli
• Mutation(s): No 
• Membrane Protein: Yes  OPM


• Deposited: 2018-08-27 Released: 2019-08-28 
• Deposition Author(s): Shiba, T., Inaoka, D.K., Sato, D., Hartuti, E.D., Amalia, E., Nagahama, M., Yoshioka, Y., Matsubayashi, M., Balogun, E.O., Tsuji, N., Kita, K., Harada, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.50 Å
• R-Value Free: 
  0.359 (Depositor), 0.354 (DCC) 
• R-Value Work: 
  0.272 (Depositor), 0.271 (DCC) 
• R-Value Observed: 
  0.276 (Depositor) 

Starting Model: experimental

Literature

Structural and Biochemical Features of Eimeria tenella Dihydroorotate Dehydrogenase, a Potential Drug Target.

Sato, D., Hartuti, E.D., Inaoka, D.K., Sakura, T., Amalia, E., Nagahama, M., Yoshioka, Y., Tsuji, N., Nozaki, T., Kita, K., Harada, S., Matsubayashi, M., Shiba, T.

(2020) Genes (Basel) 11

• PubMed: 33297567 
• DOI: https://doi.org/10.3390/genes11121468
• Primary Citation Related Structures: 
  6AJ5, 6AJE, 6IDJ


• PubMed Abstract: 
  

  Dihydroorotate dehydrogenase (DHODH) is a mitochondrial monotopic membrane protein that plays an essential role in the pyrimidine de novo biosynthesis and electron transport chain pathways. In Eimeria tenella , an intracellular apicomplexan parasite that causes the most severe form of chicken coccidiosis, the activity of pyrimidine salvage pathway at the intracellular stage is negligible and it relies on the pyrimidine de novo biosynthesis pathway. Therefore, the enzymes of the de novo pathway are considered potential drug target candidates for the design of compounds with activity against this parasite. Although, DHODHs from E. tenella (EtDHODH), Plasmodium falciparum (PfDHODH), and human (HsDHODH) show distinct sensitivities to classical DHODH inhibitors, in this paper, we identify ferulenol as a potent inhibitor of both EtDHODH and HsDHODH. Additionally, we report the crystal structures of EtDHODH and HsDHODH in the absence and presence of ferulenol. Comparison of these enzymes showed that despite similar overall structures, the EtDHODH has a long insertion in the N-terminal helix region that assumes a disordered configuration. In addition, the crystal structures revealed that the ferulenol binding pocket of EtDHODH is larger than that of HsDHODH. These differences can be explored to accelerate structure-based design of inhibitors specifically targeting EtDHODH.

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Organizational Affiliation: 
• Department of Applied Biology, Graduate School of Science Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
Department of Parasitology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan.
Department of Molecular Infection Dynamics, Institute of Tropical Medicine (NEKKEN), Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan.
School of Tropical Medicine and Global Health, Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan.
Department of Biomedical Chemistry, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Department of Parasitology, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0374, Japan.
Department of Host-Defense Biochemistry, Institute of Tropical Medicine (NEKKEN), Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan.
Division of Veterinary Science, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-58 Rinku Orai Kita, Izumisano, Osaka 598-8531, Japan.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Biological Assembly 3  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 3 assigned by authors and generated by PISA (software)

Biological Assembly 4  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 4 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 197.62 kDa 
• Atom Count: 11,453 
• Modeled Residue Count: 1,445 
• Deposited Residue Count: 1,744 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Dihydroorotate dehydrogenase (quinone), mitochondrial	A, B, C, D	436	Eimeria tenella	Mutation(s): 0  Gene Names: ETH_00004975 EC: 1.3.5.2 Membrane Entity: Yes
UniProt
Find proteins for U6KL66 (Eimeria tenella) Explore U6KL66  Go to UniProtKB:  U6KL66

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FMN	E [auth A], G [auth B], I [auth C], K [auth D]	FLAVIN MONONUCLEOTIDE C17 H21 N4 O9 P FVTCRASFADXXNN-SCRDCRAPSA-N
ORO	F [auth A], H [auth B], J [auth C], L [auth D]	OROTIC ACID C5 H4 N2 O4 PXQPEWDEAKTCGB-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.50 Å
• R-Value Free:  0.359 (Depositor), 0.354 (DCC) 
• R-Value Work:  0.272 (Depositor), 0.271 (DCC) 
• R-Value Observed: 0.276 (Depositor) 

Space Group: I 2 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 248.808	α = 90
b = 248.808	β = 90
c = 248.808	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2019-08-28 
Deposition Author(s): Shiba, T., Inaoka, D.K., Sato, D., Hartuti, E.D., Amalia, E., Nagahama, M., Yoshioka, Y., Matsubayashi, M., Balogun, E.O., Tsuji, N., Kita, K., Harada, S.

Revision History  

• Version 1.0: 2019-08-28
  Type: Initial release
  
• Version 1.1: 2020-12-23
  Changes: Database references
• Version 1.2: 2023-11-22
  Changes: Data collection, Database references, Refinement description
• Version 1.3: 2024-10-23
  Changes: Structure summary