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Structure of IGLB12 Fab in complex with anti-idiotype IB3 Fab

Analyse Structure of IGLB12 Fab in complex with anti-idiotype IB3 Fab in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
6OL5
Type
protein
Length
863 residues
Chains
4
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
IB3 heavy chain; IB3 light chain; IGLB12 heavy chain; IGLB12 light chain
Ligands
NH4, PO4, CL
Pockets
10 · best druggability 0.66

Structure

x-ray diffraction · 4 distinct chains · 7% helix, 53% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
AIB3 heavy chainprotein2109% helix, 54% strand—
BIB3 light chainprotein2136% helix, 53% strand—
HIGLB12 heavy chainprotein2287% helix, 50% strand—
LIGLB12 light chainprotein2127% helix, 53% strand—

Ligands and binding sites

  • NH4 · Ammonium ion · ion · 18 copies · chains A, B, H, L
  • PO4 · Phosphate ion · ion · 14 copies · chains A, B, H, L
  • CL · Chloride ion · ion · 13 copies · chains A, B, H, L
  • MPD · (4S)-2-methyl-2,4-pentanediol · additive · 2 copies · chains A, H

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

Pockets

10 pockets found on a 1 Å grid, 4 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
17650.660.7475NH4, PO4
2550.610.9219PO4
34360.590.7551empty
41240.570.8425CL, PO4
51060.490.8127NH4, PO4, CL

Interfaces

6 interfaces between chains.

  • H–L · 2058 Ų buried · 24 hydrogen bonds · protein-protein
  • A–B · 1718 Ų buried · 14 hydrogen bonds · protein-protein
  • A–H · 653 Ų buried · 13 hydrogen bonds · protein-protein
  • B–H · 380 Ų buried · 4 hydrogen bonds · protein-protein
  • B–L · 307 Ų buried · 8 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 8 disulfide, 1 modified (disulfide, cyclization).

Compared structures

  • 6OL5 · Structure of iglb12 Fab in complex with anti-idiotype ib3 Fab · the same entry in another collection · chain A against A, TM-score 1.00

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