Superactivation of the Botulinum Neurotoxin Serotype A Light Chain Metalloprotease: A New Wrinkle in Botulinum Neurotoxin
نویسندگان
چکیده
منابع مشابه
Enzymatic autocatalysis of botulinum A neurotoxin light chain.
Highly purified recombinant zinc-endopeptidase light chain of the botulinum neurotoxin serotype A underwent autocatalytic proteolytic processing and fragmentation. In the absence of added zinc, initially 10-28 residues were cleaved from the C-terminal end of the 448-residue protein followed by the appearance of an SDS-stable dimer and finally fragmentation near the middle of the molecule. In th...
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TO THE EDITOR—I write in reference to the publication of the articles and commentaries regarding the purported new botulinum neurotoxin serotype H [1–4]. For the past 30 years, the genetics and physiology of Clostridium botulinum, particularly the properties of serotypes and subtypes of botulinum neurotoxins, have been studied in my tier 1 select agent laboratory. I also have a dual use researc...
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Botulinum neurotoxins (BoNTs) are the most potent of the known biological toxins, and consequently are listed as category A biowarfare agents. Currently, the only treatments against BoNTs include preventative antitoxins and long-term supportive care. Consequently, there is an urgent need for therapeutics to counter these enzymes--post exposure. In a previous study, we identified a number of sma...
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Botulinum neurotoxins (BoNTs) are among the most lethal biological substances to have been weaponized and are listed as biodefense category A agents. Currently, no small molecule (non-peptidic) therapeutics exist to counter this threat; hence, identifying and developing compounds that inhibit BoNTs is a high priority. In the present study, a high-throughput assay was used to identify small mole...
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Botulinum neurotoxins (BoNTs) exhibit extraordinary potency due to their exquisite neurospecificity, which is achieved by dual binding to complex polysialo-gangliosides and synaptic vesicle proteins. The luminal domain 4 (LD4) of the three synaptic vesicle glycoprotein 2 isoforms, SV2A-C, identified as protein receptors for the most relevant serotype BoNT/A, binds within the 50 kDa cell binding...
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ژورنال
عنوان ژورنال: Journal of the American Chemical Society
سال: 2006
ISSN: 0002-7863,1520-5126
DOI: 10.1021/ja057699z