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Human glutathione transferase A4-4 complex with iodobenzyl glutathione

Analyse Human glutathione transferase A4-4 complex with iodobenzyl glutathione in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
1GUL
Type
protein
Length
1,752 residues
Chains
16
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Glutathione transferase A4-4; S-(2-iodobenzyl) glutathione
EC
2.5.1.18
UniProt
O15217
Ligands
GGL
Pockets
20 · best druggability 0.70

Structure

x-ray diffraction · 2 distinct chains · 58% helix, 8% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
A, B, C, D, E, F, G, HGlutathione transferase A4-4 (EC 2.5.1.18)protein21759% helix, 8% strandO15217
I, J, K, L, M, N, O, PS-(2-iodobenzyl) glutathioneprotein20% helix, 0% strand—

Ligands and binding sites

  • GGL · Gamma-L-glutamic acid · ligand · 8 copies · chains A, I, B, J, C, K, D, L, E, M, F, N, G, O, H, P

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

Pockets

20 pockets found on a 1 Å grid, 15 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
14730.700.8049GGL
26100.700.7853GGL
36820.690.7766empty
45450.690.7852GGL
55560.680.7851GGL

Interfaces

25 interfaces between chains.

  • E–F · 1400 Ų buried · 10 hydrogen bonds · protein-protein
  • C–D · 1394 Ų buried · 10 hydrogen bonds · protein-protein
  • A–B · 1386 Ų buried · 9 hydrogen bonds · protein-protein
  • G–H · 1373 Ų buried · 8 hydrogen bonds · protein-protein
  • F–G · 550 Ų buried · 5 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 8 covalent, 8 modified (covalent ligand, nonstandard).

Compared structures

  • 1GUL · Human glutathione transferase A4-4 complex with iodobenzyl glutathione · the same entry in another collection · chain H against H, TM-score 1.00
  • O15217 · AlphaFold monomer V2.0 prediction for glutathione S-transferase A4 (O15217) · a predicted model of the same protein · chain B against A, TM-score 0.99

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