4YSX

Crystal structure of Mitochondrial rhodoquinol-fumarate reductase from Ascaris suum with the specific inhibitor NN23


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural Insights into the Molecular Design of Flutolanil Derivatives Targeted for Fumarate Respiration of Parasite Mitochondria

Inaoka, D.K.Shiba, T.Sato, D.Balogun, E.O.Sasaki, T.Nagahama, M.Oda, M.Matsuoka, S.Ohmori, J.Honma, T.Inoue, M.Kita, K.Harada, S.

(2015) Int J Mol Sci 16: 15287-15308

  • DOI: 10.3390/ijms160715287
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Recent studies on the respiratory chain of Ascaris suum showed that the mitochondrial NADH-fumarate reductase system composed of complex I, rhodoquinone and complex II plays an important role in the anaerobic energy metabolism of adult A. suum. The s ...

    Recent studies on the respiratory chain of Ascaris suum showed that the mitochondrial NADH-fumarate reductase system composed of complex I, rhodoquinone and complex II plays an important role in the anaerobic energy metabolism of adult A. suum. The system is the major pathway of energy metabolism for adaptation to a hypoxic environment not only in parasitic organisms, but also in some types of human cancer cells. Thus, enzymes of the pathway are potential targets for chemotherapy. We found that flutolanil is an excellent inhibitor for A. suum complex II (IC50 = 0.058 μM) but less effectively inhibits homologous porcine complex II (IC50 = 45.9 μM). In order to account for the specificity of flutolanil to A. suum complex II from the standpoint of structural biology, we determined the crystal structures of A. suum and porcine complex IIs binding flutolanil and its derivative compounds. The structures clearly demonstrated key interactions responsible for its high specificity to A. suum complex II and enabled us to find analogue compounds, which surpass flutolanil in both potency and specificity to A. suum complex II. Structures of complex IIs binding these compounds will be helpful to accelerate structure-based drug design targeted for complex IIs.


    Organizational Affiliation

    Department of Applied Biology, Graduate School of Science Technology, Kyoto Institute of Technology, Kyoto 606-8585, Japan. harada@kit.ac.jp.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Succinate dehydrogenase flavoprotein
A, E
645Ascaris suumMutation(s): 0 
Membrane protein
inferred by homology
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Oxidoreductases
Protein: 
Mitochondrial rhodoquinol-fumarate reductase
Protein Feature View is not available: No corresponding UniProt sequence found.

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Succinate dehydrogenase [ubiquinone] iron-sulfur subunit, mitochondrial
B, F
282Ascaris suumMutation(s): 0 
EC: 1.3.5.1
Membrane protein
inferred by homology
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Oxidoreductases
Protein: 
Mitochondrial rhodoquinol-fumarate reductase
Find proteins for O44074 (Ascaris suum)
Go to UniProtKB:  O44074

Find similar proteins by: Sequence  |  Structure

Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Cytochrome b-large subunit
C, G
188Ascaris suumMutation(s): 0 
Membrane protein
inferred by homology
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Oxidoreductases
Protein: 
Mitochondrial rhodoquinol-fumarate reductase
Find proteins for P92506 (Ascaris suum)
Go to UniProtKB:  P92506

Find similar proteins by: Sequence  |  Structure

Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial
D, H
156Ascaris suumMutation(s): 0 
Membrane protein
inferred by homology
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Oxidoreductases
Protein: 
Mitochondrial rhodoquinol-fumarate reductase
Find proteins for P92507 (Ascaris suum)
Go to UniProtKB:  P92507
Small Molecules
Ligands 8 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

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

Download CCD File 
D, H
L-ALPHA-PHOSPHATIDYL-BETA-OLEOYL-GAMMA-PALMITOYL-PHOSPHATIDYLETHANOLAMINE
C39 H68 N O8 P
MABRTXOVHMDVAT-AAEGOEIASA-N
 Ligand Interaction
HEM
Query on HEM

Download CCD File 
C, G
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
SF4
Query on SF4

Download CCD File 
B, F
IRON/SULFUR CLUSTER
Fe4 S4
LJBDFODJNLIPKO-VKOJMFJBAC
 Ligand Interaction
E23
Query on E23

Download CCD File 
B, G
N-(4-tert-butylbenzyl)-2-(trifluoromethyl)benzamide
C19 H20 F3 N O
RYYHDFPDKHYSSE-UHFFFAOYSA-N
 Ligand Interaction
F3S
Query on F3S

Download CCD File 
B, F
FE3-S4 CLUSTER
Fe3 S4
FCXHZBQOKRZXKS-MZMDZPPWAW
 Ligand Interaction
FES
Query on FES

Download CCD File 
B, F
FE2/S2 (INORGANIC) CLUSTER
Fe2 S2
NIXDOXVAJZFRNF-UHFFFAOYSA-N
 Ligand Interaction
MLI
Query on MLI

Download CCD File 
A, E
MALONATE ION
C3 H2 O4
OFOBLEOULBTSOW-UHFFFAOYSA-L
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
E23IC50:  5.5   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 124.2α = 90
b = 127.909β = 90
c = 220.546γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data processing
HKL-2000data scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-08-05
    Type: Initial release
  • Version 1.1: 2017-12-06
    Changes: Data collection, Database references, Derived calculations