1g73

X-ray diffraction
2Å resolution

CRYSTAL STRUCTURE OF SMAC BOUND TO XIAP-BIR3 DOMAIN

Released:
Source organism: Homo sapiens
Primary publication:
Structural basis of IAP recognition by Smac/DIABLO.
Nature 408 1008-12
PMID: 11140638

Function and Biology Details

Reaction catalysed:
S-ubiquitinyl-[E2 ubiquitin-conjugating enzyme]-L-cysteine + [acceptor protein]-L-lysine = [E2 ubiquitin-conjugating enzyme]-L-cysteine + N(6)-ubiquitinyl-[acceptor protein]-L-lysine
Biochemical function:
  • not assigned
Cellular component:

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
PDBe Complex ID:
PDB-CPX-161371 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Diablo IAP-binding mitochondrial protein, cleaved form Chains: A, B
Molecule details ›
Chains: A, B
Length: 162 amino acids
Theoretical weight: 18.12 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: Q9NR28 (Residues: 56-217; Coverage: 68%)
Gene names: DIABLO, SMAC
Sequence domains: Second Mitochondria-derived Activator of Caspases
Structure domains: Methane Monooxygenase Hydroxylase; Chain G, domain 1
E3 ubiquitin-protein ligase XIAP Chains: C, D
Molecule details ›
Chains: C, D
Length: 121 amino acids
Theoretical weight: 13.93 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P98170 (Residues: 238-358; Coverage: 24%)
Gene names: API3, BIRC4, IAP3, XIAP
Sequence domains: Inhibitor of Apoptosis domain
Structure domains: Inhibitor Of Apoptosis Protein (2mihbC-IAP-1); Chain A

Ligands and Environments

1 bound ligand:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: RIGAKU RU200
Spacegroup: P1
Unit cell:
a: 48.1Å b: 52.9Å c: 67.1Å
α: 100° β: 104.1° γ: 94°
R-values:
R R work R free
0.227 0.227 0.268
Expression system: Escherichia coli BL21(DE3)