Antibodies Against Recombinant Shiga Toxin Subunit B Neutralize Shiga Toxin Toxicity in HeLa Cells
| Autor: | Ram Kumar Dhaked, Manglesh Kumar Singh, Padma Singh, Mugdha Tiwari, Pallavi Gupta |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Shigella dysenteriae
Cell Survival Protein subunit Blotting Western medicine.disease_cause Biochemistry Antibodies Shiga Toxin law.invention Microbiology Mice Structural Biology law medicine Animals Humans Escherichia coli Antiserum Mice Inbred BALB C biology Toxin Chemistry Immune Sera Shiga toxin General Medicine biology.organism_classification Antibodies Neutralizing Molecular biology Recombinant Proteins Protein Subunits Recombinant DNA biology.protein Electrophoresis Polyacrylamide Gel Immunization Antibody HeLa Cells |
| Zdroj: | Protein & Peptide Letters. 17:774-781 |
| ISSN: | 0929-8665 |
| DOI: | 10.2174/092986610791190291 |
| Popis: | Shigella dysenteriae type 1 and Escherichia coli O157:H7 produce Shiga toxin 1 (Stx) and Shiga toxin1 (Stx1), respectively and these two toxins are almost identical. E. coli O157:H7 is the major cause of diarrhea-associated hemolytic uremic syndrome. Stx and Stx1 are AB5 type of toxin with a molecular weight of 70 kDa, comprising an enzymaticaly-active A subunit (32 kDa) and five receptor-binding B subunits (7.7 kDa). In this study DNA fragment (289 bp, Gene Bank Accn No. EF685161) coding for B chain of Stx was amplified from S. dysenteriae type1 and cloned. Shiga toxin-binding subunit was expressed and purified in native conditions by affinity and gel permeation chromatography with the yield of 5.1 mg/L in shake flask culture. For the purpose of immunization, the polypeptide was polymerized with glutaraldehyde. Hyper immune serum produced in mice reacted with the purified polypeptide and intact Shiga toxin. The anti-StxB antiserum effectively neutralized the cytotoxicity of Shiga toxin towards HeLa cells. |
| Databáze: | OpenAIRE |
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