The Protein Journal

, Volume 32, Issue 4, pp 288–296

Purification and Characterization of Neurotoxin Complex from a Dual Toxin Gene Containing Clostridium Botulinum Strain PS-5

  • Ajay K. Singh
  • Amita Sachdeva
  • Jeffrey A. DeGrasse
  • Timothy R. Croley
  • Larry H. Stanker
  • David Hodge
  • Shashi K. Sharma
Article

DOI: 10.1007/s10930-013-9486-1

Cite this article as:
Singh, A.K., Sachdeva, A., DeGrasse, J.A. et al. Protein J (2013) 32: 288. doi:10.1007/s10930-013-9486-1
  • 220 Views

Abstract

Botulinum neurotoxins are produced as a toxin complex (TC) which consists of neurotoxin (NT) and neurotoxin associated proteins. The characterization of NT in its native state is an essential step for developing diagnostics and therapeutic countermeasures against botulism. The presence of NT genes was validated by PCR amplification of toxin specific fragments from genomic DNA of Clostridium botulinum strain PS-5 which indicated the presence of both serotype A and B genes on PS-5 genome. Further, TC was purified and characterized by Western blotting, Digoxin-enzyme linked immunosorbent assay, endopeptidase activity assay, and Liquid chromatography–Mass spectrometry. The data showed the presence of serotype A specific neurotoxin. Based on the analysis of neurotoxin genes and characterization of TC, PS-5 strain appears as a serotype A (B) strain of C. botulinum which produces only serotype A specific TC in the cell culture medium.

Keywords

BotulismNeurotoxin complexNeurotoxin associated proteinsPCRELISAWestern blotEndopeptidase activity

Abbreviations

BoNT

Botulinum neurotoxin

TC

Toxin complex

NAPs

Neurotoxin associated proteins

NTNH

Nontoxic non-hemagglutinin

HAs

Hemagglutinins

gDNA

Genomic DNA

DIG-ELISA

Digoxigenin-enzyme-linked immunosorbent assay

LC-MS

Liquid chromatography-Mass spectrometry

Copyright information

© Springer Science+Business Media New York (outside the USA)  2013

Authors and Affiliations

  • Ajay K. Singh
    • 1
  • Amita Sachdeva
    • 1
  • Jeffrey A. DeGrasse
    • 2
  • Timothy R. Croley
    • 2
  • Larry H. Stanker
    • 3
  • David Hodge
    • 4
  • Shashi K. Sharma
    • 1
  1. 1. Divisions of Microbiology, Center for Food Safety and Applied NutritionFood and Drug AdministrationCollege ParkUSA
  2. 2.Analytical Chemistry, Center for Food Safety and Applied NutritionFood and Drug AdministrationCollege ParkUSA
  3. 3.Western Regional Research Center, Agricultural Research ServiceUnited States Department of AgricultureAlbanyUSA
  4. 4.Department of Homeland SecurityWashingtonUSA