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MolNFT v1 · #92112 · protein

Crystal structure of the intact E. COLI relbe toxin-antitoxin complex

4FXE · Antitoxin relb: “Crystal structure of the intact E. COLI relbe toxin-antitoxin complex”. X-ray diffraction, 1 ligand (SO4), 3 pockets (best druggability 0.40). MolNFT v1 #92112 on GenesisL1: 3D structure, binding sites and pockets…

PDB
4FXE
Type
protein
Length
425 residues
Chains
6
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Antitoxin relb; MRNA interferase rele
EC
3.1.-.-
UniProt
P0C079, P0C077
Ligands
SO4
Pockets
3 · best druggability 0.40

Structure

x-ray diffraction · 6 distinct chains · 48% helix, 22% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
AAntitoxin relbprotein6871% helix, 7% strandP0C079
BAntitoxin relbprotein7863% helix, 12% strandP0C079
CAntitoxin relbprotein4757% helix, 6% strandP0C079
DMRNA interferase rele (EC 3.1.-.-)protein7135% helix, 32% strandP0C077
EMRNA interferase rele (EC 3.1.-.-)protein8234% helix, 32% strandP0C077
FMRNA interferase rele (EC 3.1.-.-)protein7937% helix, 33% strandP0C077

Ligands and binding sites

  • SO4 · Sulfate ion · ion · 3 copies · chains A, B

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

Pockets

3 pockets found on a 1 Å grid, 0 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
11220.400.7520empty
2960.390.7618empty
3570.290.7413empty

Interfaces

6 interfaces between chains.

  • A–B · 1923 Ų buried · 33 hydrogen bonds · protein-protein
  • B–E · 1290 Ų buried · 20 hydrogen bonds · protein-protein
  • C–F · 1178 Ų buried · 20 hydrogen bonds · protein-protein
  • A–D · 666 Ų buried · 10 hydrogen bonds · protein-protein
  • C–D · 304 Ų buried · 5 hydrogen bonds · protein-protein

Compared structures

  • 4FXE · Crystal structure of the intact E. coli RelBE toxin-antitoxin complex · the same entry in another collection · chain F against F, TM-score 1.00
  • P0C077 · AlphaFold monomer V2.0 prediction for mRNA interferase toxin rele (P0C077) · a predicted model of the same protein · chain F against A, TM-score 0.97
  • P0C079 · AlphaFold monomer V2.0 prediction for antitoxin relb (P0C079) · a predicted model of the same protein · chain A against A, TM-score 0.65

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