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Avidin-homobiotin complex

Analyse Avidin-homobiotin complex in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
1LDQ
Type
protein
Length
223 residues
Chains
2
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Avidin
UniProt
P02701
Ligands
SHM, NAG
Pockets
2 · best druggability 0.34

Structure

x-ray diffraction · 2 distinct chains · 3% helix, 55% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
AAvidinprotein1113% helix, 57% strandP02701
BAvidinprotein1123% helix, 54% strandP02701

Ligands and binding sites

  • SHM · Homobiotin · ligand · 2 copies · chains A, B
  • NAG · 2-acetamido-2-deoxy-beta-D-glucopyranose · sugar · 2 copies · chains A, B

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

Pockets

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

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
1660.340.7514SHM
2640.330.7514SHM

Interfaces

1 interface between chains.

  • A–B · 149 Ų buried · 0 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 2 disulfide, 2 glycan (disulfide, N-glycosylation).

Compared structures

  • 1LDQ · avidin-homobiotin complex · the same entry in another collection · chain A against A, TM-score 1.00
  • P02701 · AlphaFold monomer V2.0 prediction for avidin (P02701) · a predicted model of the same protein · chain B against A, TM-score 0.97

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