BoNT/C LC cleaves target cell STX1

Stable Identifier
R-HSA-181567
Type
Reaction [transition]
Species
Homo sapiens
Related Species
Clostridium botulinum
Compartment
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Botulinum toxin type C light chain (BoNT/C LC), in the cytosol of a target cell, catalyzes the removal of an aminoterminal peptide from syntaxin 1 (STX1). BoNT/C LC is a zinc metalloprotease (Blasi et al. 1993; Foran et al. 1994). STX1 is associated with the cytosolic face of the target cell plasma membrane where it forms part of a complex required for synaptic vesicle docking and exocytosis. Its cleavage by botulinum toxin blocks synaptic vesicle fusion with the plasma membrane and neurotransmitter release (Sudhof et al, 1993; Sudhof 2004).

Literature References
PubMed ID Title Journal Year
8402889 Membrane fusion machinery: insights from synaptic proteins

Südhof, TC, De Camilli, P, Niemann, H, Jahn, R

Cell 1993
8611567 Botulinum neurotoxin C1 cleaves both syntaxin and SNAP-25 in intact and permeabilized chromaffin cells: correlation with its blockade of catecholamine release

Foran, P, Lawrence, GW, Shone, CC, Foster, KA, Dolly, JO

Biochemistry 1996
7901002 Botulinum neurotoxin C1 blocks neurotransmitter release by means of cleaving HPC-1/syntaxin

Blasi, J, Chapman, ER, Yamasaki, S, Binz, T, Niemann, H, Jahn, R

EMBO J. 1993
15217342 The synaptic vesicle cycle

Südhof, TC

Annu Rev Neurosci 2004
Participants
Participant Of
Catalyst Activity
Catalyst Activity
Title
metalloendopeptidase activity of BoNT/C LC:Zn2+ [cytosol]
Physical Entity
Activity
Disease
Name Identifier Synonyms
botulism 11976 Botulism (disorder), Intoxication with Clostridium botulinum toxin, Botulism, Infection due to clostridium botulinum, Botulism, Foodborne botulism, botulism, Botulism, Botulism, Botulism, Food poisoning due to Clostridium botulinum, Botulism poisoning
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