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Crystal structure of mitochondrial rhodoquinol-fumarate reductase from ascaris suum with N-[(2,4-DICHLOROPHENYL)METHYL]-2-(trifluoromethyl) benzamide

Analyse Crystal structure of mitochondrial rhodoquinol-fumarate reductase from ascaris… in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
4YSY
Type
protein
Length
2,296 residues
Chains
8
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Succinate dehydrogenase flavoprotein; Succinate dehydrogenase [ubiquinone] iron-sulfur…
EC
1.3.5.1
UniProt
U1LRQ3, O44074, P92506, P92507
Ligands
FAD, FES, SF4, F3S, E24, HEM, EPH
Pockets
20 · best druggability 0.86

Structure

x-ray diffraction · 4 distinct chains · 41% helix, 15% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
A, ESuccinate dehydrogenase flavoproteinprotein61633% helix, 22% strandU1LRQ3
B, FSuccinate dehydrogenase [ubiquinone] iron-sulfur subunit, mitochondrial (EC 1.3.5.1)protein25028% helix, 15% strandO44074
C, GCytochrome B-large subunitprotein15375% helix, 1% strandP92506
D, HSuccinate dehydrogenase [ubiquinone] cytochrome B small subunit, mitochondrialprotein12967% helix, 2% strandP92507

Ligands and binding sites

  • FAD · Flavin-adenine dinucleotide · ligand · 2 copies · chains A, B, E
  • FES · Fe2/s2 (inorganic) cluster · ligand · 2 copies · chains B, F
  • SF4 · Iron/sulfur cluster · ligand · 2 copies · chains B, F
  • F3S · FE3-S4 cluster · ligand · 2 copies · chains B, F
  • E24 · N-(2,4-dichlorobenzyl)-2-(trifluoromethyl)benzamide · ligand · 2 copies · chains B, C, D, F, G, H
  • HEM · Protoporphyrin IX containing Fe · ligand · 2 copies · chains B, C, D, F, G, H
  • EPH · L-alpha-phosphatidyl-beta-oleoyl-gamma-palmitoyl-phosphatidylethanolamine · ligand · 2 copies · chains C, D, G, H
  • MLI · Malonate ion · additive · 2 copies · chains A, E

Binding sites are the residues within 4.5 Å of a ligand's heavy atoms.

Pockets

20 pockets found on a 1 Å grid, 19 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
110840.860.8696E24, HEM, EPH
23060.850.9552MLI, FAD
33070.850.9556MLI, FAD
411760.850.8593E24, HEM, EPH
57700.780.8278empty

Interfaces

17 interfaces between chains.

  • E–F · 2792 Ų buried · 43 hydrogen bonds · protein-protein
  • A–B · 2772 Ų buried · 39 hydrogen bonds · protein-protein
  • B–C · 1932 Ų buried · 17 hydrogen bonds · protein-protein
  • F–G · 1926 Ų buried · 17 hydrogen bonds · protein-protein
  • C–D · 1839 Ų buried · 14 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 2 disulfide (disulfide).

Compared structures

  • 4YSY · Crystal structure of Mitochondrial rhodoquinol-fumarate reductase from Ascaris suum with… · the same entry in another collection · chain H against H, TM-score 1.00
  • P92507 · AlphaFold monomer V2.0 prediction for succinate dehydrogenase [ubiquinone] cytochrome B… · a predicted model of the same protein · chain H against A, TM-score 0.89

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