Botulinum neurotoxin (NT) serotypes A, B and E differ in microstructure and biological activities. The three NTs were examined for secondary structure parameters (alpha-helix, beta-sheet, beta-turn and random coil content) on the basis of circular dichroism; degree of exposed Tyr residues (second de
Crystal structure of botulinum neurotoxin type A and implications for toxicity
β Scribed by Lacy, D. Borden; Tepp, William; Cohen, Alona C.; DasGupta, Bibhuti R.; Stevens, Raymond C.
- Book ID
- 109679551
- Publisher
- Nature Publishing Group
- Year
- 1998
- Tongue
- English
- Weight
- 588 KB
- Volume
- 5
- Category
- Article
- ISSN
- 1072-8368
- DOI
- 10.1038/2338
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Although the relative potency measured by the number of units per nanogram of the toxin is different for the three preparations (BOTOX Ο 20 U/ng; Dysport Ο 40 U/ng, and CS-BOT Ο 15.2 U/ng), the effective dose for CS-BOT is similar to that of BOTOX (Allergan, Irvine, CA). Despite the twofold differen
Reductive methylation of botulinum neurotoxin (NT) serotypes A and B at various ratios of protein to reagent modified up to 75% of the lysine residues. Amino acid analysis of the modified proteins (HCl hydrolysed) confirmed selective modifications of lysine. The derivative N,N-dimethyl lysine was mo