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EC 3.4.24.69 Details
EC number
3.4.24.69
Accepted name
bontoxilysin
Reaction
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
Other name(s)
botulinum neurotoxin, BoNT
CAS registry number
107231-12-9
Comment
This zinc enzyme, produced by Clostridium botulinum, occurs as forms A-G that differ in specificity of action on the proteins of the neuroexocytosis apparatus [1-5]. The 150-kDa proenzymes of bontoxilysin are processed to disulfide-linked subunits of 100 and 50 kDa, the latter being responsible for the endopeptidase activities. Weakly inhibited by captopril, and phosphoramidon. Toxicity is due to action at the neuromuscular junctions that blocks release of acetylcholine, causing flaccid paralysis, in contrast to the spastic paralysis caused by tentoxilysin. In peptidase family M27 (tentoxilysin family)
History
created 1995
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EC Tree
1 Oxidoreductases
2 Transferases
3 Hydrolases
3.1 Acting on ester bonds
3.2 Glycosylases
3.3 Acting on ether bonds
3.4 Acting on peptide bonds (peptidases)
3.4.1 α-Amino-acyl-peptide hydrolases (deleted sub-subclass)
3.4.2 Peptidyl-amino-acid hydrolases (deleted sub-subclass)
3.4.3 Dipeptide hydrolases (deleted sub-subclass)
3.4.4 Peptidyl peptide hydrolases (deleted sub-subclass)
3.4.11 Aminopeptidases
3.4.12 Peptidylamino-acid hydrolases or acylamino-acid hydrolases (deleted sub-subclass)
3.4.13 Dipeptidases
3.4.14 Dipeptidyl-peptidases and tripeptidyl-peptidases
3.4.15 Peptidyl-dipeptidases
3.4.16 Serine-type carboxypeptidases
3.4.17 Metallocarboxypeptidases
3.4.18 Cysteine-type carboxypeptidases
3.4.19 Omega peptidases
3.4.21 Serine endopeptidases
3.4.22 Cysteine endopeptidases
3.4.23 Aspartic endopeptidases
3.4.24 Metalloendopeptidases
3.4.24.1 atrolysin A
3.4.24.2 created 1972, deleted 1992
3.4.24.3 microbial collagenase
3.4.24.4 created 1972 [EC 3.4.99.13 and EC 3.4.99.22 both created 1972, incorporated 1978], deleted 1992
3.4.24.5 created 1978, deleted 1989
3.4.24.6 leucolysin
3.4.24.7 interstitial collagenase
3.4.24.8 created 1978, deleted 1992
3.4.24.9 created 1978, deleted 1992
3.4.24.10 created 1972 as EC 3.4.99.12, transferred 1978 to EC 3.4.24.10, deleted 1992
3.4.24.11 neprilysin
3.4.24.12 envelysin
3.4.24.13 IgA-specific metalloendopeptidase
3.4.24.14 procollagen N-endopeptidase
3.4.24.15 thimet oligopeptidase
3.4.24.16 neurolysin
3.4.24.17 stromelysin 1
3.4.24.18 meprin A
3.4.24.19 procollagen C-endopeptidase
3.4.24.20 peptidyl-Lys metalloendopeptidase
3.4.24.21 astacin
3.4.24.22 stromelysin 2
3.4.24.23 matrilysin
3.4.24.24 gelatinase A
3.4.24.25 vibriolysin
3.4.24.26 pseudolysin
3.4.24.27 thermolysin
3.4.24.28 bacillolysin
3.4.24.29 aureolysin
3.4.24.30 coccolysin
3.4.24.31 mycolysin
3.4.24.32 β-lytic metalloendopeptidase
3.4.24.33 peptidyl-Asp metalloendopeptidase
3.4.24.34 neutrophil collagenase
3.4.24.35 gelatinase B
3.4.24.36 leishmanolysin
3.4.24.37 saccharolysin
3.4.24.38 gametolysin
3.4.24.39 deuterolysin
3.4.24.40 serralysin
3.4.24.41 atrolysin B
3.4.24.42 atrolysin C
3.4.24.43 atroxase
3.4.24.44 atrolysin E
3.4.24.45 atrolysin F
3.4.24.46 adamalysin
3.4.24.47 horrilysin
3.4.24.48 ruberlysin
3.4.24.49 bothropasin
3.4.24.50 bothrolysin
3.4.24.51 ophiolysin
3.4.24.52 trimerelysin I
3.4.24.53 trimerelysin II
3.4.24.54 mucrolysin
3.4.24.55 pitrilysin
3.4.24.56 insulysin
3.4.24.57 O-sialoglycoprotein endopeptidase
3.4.24.58 russellysin
3.4.24.59 mitochondrial intermediate peptidase
3.4.24.60 dactylysin
3.4.24.61 nardilysin
3.4.24.62 magnolysin
3.4.24.63 meprin B
3.4.24.64 mitochondrial processing peptidase
3.4.24.65 macrophage elastase
3.4.24.66 choriolysin L
3.4.24.67 choriolysin H
3.4.24.68 tentoxilysin
3.4.24.69 bontoxilysin
3.4.24.70 oligopeptidase A
3.4.24.71 endothelin-converting enzyme 1
3.4.24.72 fibrolase
3.4.24.73 jararhagin
3.4.24.74 fragilysin
3.4.24.75 lysostaphin
3.4.24.76 flavastacin
3.4.24.77 snapalysin
3.4.24.78 gpr endopeptidase
3.4.24.79 pappalysin-1
3.4.24.80 membrane-type matrix metalloproteinase-1
3.4.24.81 ADAM10 endopeptidase
3.4.24.82 ADAMTS-4 endopeptidase
3.4.24.83 anthrax lethal factor endopeptidase
3.4.24.84 Ste24 endopeptidase
3.4.24.85 S2P endopeptidase
3.4.24.86 ADAM 17 endopeptidase
3.4.24.87 ADAMTS13 endopeptidase
3.4.24.88 desampylase
3.4.24.89 Pro-Pro endopeptidase
3.4.25 Threonine endopeptidases
3.4.99 Endopeptidases of unknown catalytic mechanism (sub-subclass is currently empty)
3.5 Acting on carbon-nitrogen bonds, other than peptide bonds
3.6 Acting on acid anhydrides
3.7 Acting on carbon-carbon bonds
3.8 Acting on halide bonds
3.9 Acting on phosphorus-nitrogen bonds
3.10 Acting on sulfur-nitrogen bonds
3.11 Acting on carbon-phosphorus bonds
3.12 Acting on sulfur-sulfur bonds
3.13 Acting on carbon-sulfur bonds
4 Lyases
5 Isomerases
6 Ligases
7 Translocases