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Crystal structure of the complex of xiap-BIR2 and caspase 3

Analyse Crystal structure of the complex of xiap-BIR2 and caspase 3 in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
1I3O
Type
protein
Length
693 residues
Chains
6
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Caspase 3; Baculoviral iap repeat-containing protein 4
EC
3.4.22.-
UniProt
P42574, P98170
Ligands
ZN
Pockets
7 · best druggability 0.63

Structure

x-ray diffraction · 5 distinct chains · 30% helix, 22% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
ACaspase 3 (EC 3.4.22.-)protein14326% helix, 31% strandP42574
B, DCaspase 3 (EC 3.4.22.-)protein10131% helix, 17% strandP42574
CCaspase 3 (EC 3.4.22.-)protein14426% helix, 31% strandP42574
EBaculoviral iap repeat-containing protein 4protein11132% helix, 12% strandP98170
FBaculoviral iap repeat-containing protein 4protein9339% helix, 14% strandP98170

Ligands and binding sites

  • ZN · Zinc ion · metal · 2 copies · chains E, F

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

Pockets

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

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
13750.630.7836empty
22810.530.7532empty
3510.510.8820empty
4720.350.7715empty
5820.320.7414empty

Interfaces

12 interfaces between chains.

  • C–D · 2133 Ų buried · 30 hydrogen bonds · protein-protein
  • A–B · 2119 Ų buried · 33 hydrogen bonds · protein-protein
  • B–D · 1597 Ų buried · 24 hydrogen bonds · protein-protein
  • D–F · 911 Ų buried · 16 hydrogen bonds · protein-protein
  • B–E · 906 Ų buried · 12 hydrogen bonds · protein-protein

Compared structures

  • 1I3O · Crystal structure of the complex of xiap-BIR2 and caspase 3 · the same entry in another collection · chain D against D, TM-score 1.00
  • P42574 · AlphaFold monomer V2.0 prediction for caspase-3 (P42574) · a predicted model of the same protein · chain A against A, TM-score 0.99

Analyse

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