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Crystal structure of aplysia californica achbp in complex with alpha- conotoxin imi

Analyse Crystal structure of aplysia californica achbp in complex with alpha- conotoxin… in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
2BYP
Type
protein
Length
1,113 residues
Chains
10
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Soluble acetylcholine receptor; Alpha-conotoxin imi
UniProt
Q8WSF8, P50983
Ligands
NAG
Pockets
20 · best druggability 0.64

Structure

x-ray diffraction · 6 distinct chains · 12% helix, 47% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
ASoluble acetylcholine receptorprotein21013% helix, 46% strandQ8WSF8
BSoluble acetylcholine receptorprotein21311% helix, 49% strandQ8WSF8
CSoluble acetylcholine receptorprotein21110% helix, 49% strandQ8WSF8
DSoluble acetylcholine receptorprotein20712% helix, 46% strandQ8WSF8
ESoluble acetylcholine receptorprotein21212% helix, 49% strandQ8WSF8
F, G, H, I, JAlpha-conotoxin imiprotein1250% helix, 0% strandP50983

Ligands and binding sites

  • NAG · 2-acetamido-2-deoxy-beta-D-glucopyranose · sugar · chains B

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

Pockets

20 pockets found on a 1 Å grid, 13 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
15060.640.7656empty
23890.600.7649empty
3820.580.8821empty
43370.570.7640empty
53290.560.7537empty

Interfaces

15 interfaces between chains.

  • B–C · 1332 Ų buried · 14 hydrogen bonds · protein-protein
  • A–B · 1316 Ų buried · 13 hydrogen bonds · protein-protein
  • A–E · 1283 Ų buried · 13 hydrogen bonds · protein-protein
  • D–E · 1261 Ų buried · 14 hydrogen bonds · protein-protein
  • C–D · 1234 Ų buried · 13 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 15 disulfide, 5 modified, 1 glycan (disulfide, nonstandard, N-glycosylation).

Compared structures

  • 2BYP · Crystal structure of Aplysia californica AChBP in complex with alpha- conotoxin ImI · the same entry in another collection · chain J against J, TM-score 1.00
  • P50983 · AlphaFold monomer V2.0 prediction for alpha-conotoxin imi (P50983) · a predicted model of the same protein · chain J against A, TM-score 0.68

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