X-ray diffraction
1.9Å resolution

A potent peptidomimetic inhibitor of botulinum neurotoxin serotype A has a very different conformation than SNAP-25 substrate


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:
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
monomeric (preferred)
Entry contents:
1 distinct polypeptide molecule
Botulinum neurotoxin A light chain Chain: A
Molecule details ›
Chain: A
Length: 417 amino acids
Theoretical weight: 47.78 KDa
Source organism: Clostridium botulinum
Expression system: Escherichia coli
  • Canonical: P0DPI1 (Residues: 1-417; Coverage: 32%)
Gene names: CBO0806, CLC_0862, bna, botA
Sequence domains: Clostridial neurotoxin zinc protease
Structure domains: Metalloproteases ("zincins"), catalytic domain like

Ligands and Environments

2 bound ligands:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: SSRL BEAMLINE BL9-1
Spacegroup: P21212
Unit cell:
a: 56.798Å b: 191.054Å c: 42.149Å
α: 90° β: 90° γ: 90°
R R work R free
0.18 0.18 0.243
Expression system: Escherichia coli