1xtg

X-ray diffraction
2.1Å resolution

Crystal structure of NEUROTOXIN BONT/A complexed with Synaptosomal-associated protein 25

Released:

Function and Biology Details

Reaction catalysed:
Limited hydrolysis of proteins of the neuroexocytosis apparatus, synaptobrevin (also known as neuronal vesicle-associated membrane protein, VAMP), synaptosome-associated protein of 25 kDa (SNAP25) or syntaxin. No detected action on small molecule substrates.
Biochemical function:
Biological process:
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
PDBe Complex ID:
PDB-CPX-144073 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Botulinum neurotoxin A light chain Chain: A
Molecule details ›
Chain: A
Length: 424 amino acids
Theoretical weight: 48.56 KDa
Source organism: Clostridium botulinum
Expression system: Escherichia coli
UniProt:
  • Canonical: P0DPI1 (Residues: 2-420; Coverage: 32%)
Gene names: CBO0806, CLC_0862, bna, botA
Sequence domains: Clostridial neurotoxin zinc protease
Structure domains: Metalloproteases ("zincins"), catalytic domain like
Synaptosomal-associated protein 25 Chain: B
Molecule details ›
Chain: B
Length: 59 amino acids
Theoretical weight: 6.74 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P60880 (Residues: 146-204; Coverage: 29%)
Gene names: SNAP, SNAP25
Structure domains: Single alpha-helices involved in coiled-coils or other helix-helix interfaces

Ligands and Environments

2 bound ligands:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ALS BEAMLINE 8.2.1, SSRL BEAMLINE BL9-2
Spacegroup: P43212
Unit cell:
a: 86Å b: 86Å c: 165.4Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.218 0.218 0.247
Expression systems:
  • Escherichia coli
  • Escherichia coli BL21(DE3)