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C8052

Sigma-Aldrich

Cholera Toxin

from Vibrio cholerae, ≥90% (SDS-PAGE), lyophilized powder, A-B type toxin

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Synonym(s):
CTX, Cholera enterotoxin, Choleragen
CAS Number:
MDL number:
UNSPSC Code:
12352200
NACRES:
NA.77

product name

Cholera Toxin from Vibrio cholerae, ≥90% (SDS-PAGE), lyophilized powder

Quality Level

Assay

≥90% (SDS-PAGE)

form

lyophilized powder

composition

Protein, ~5% Lowry-TCA

solubility

H2O: 10 mg/mL

storage temp.

2-8°C

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General description

Cholera toxin is a member of the AB5-subunit family of toxins. It consists of a single A subunit responsible for ADP-ribosylation and five B subunits arranged as a pentameric ring with cell surface receptor binding and internalization functions. The A subunit catalyzes the ADP-ribosylation of the α-subunit of the stimulatory G protein (Gαs), leading to increased adenylyl cyclase activity and cAMP levels. It also ADP-ribosylates transducing and tubulin.

Cholera toxin and its A subunit are commonly used to study signal transduction mechanisms due to their impact on adenylate cyclase. Additionally, cholera toxin acts as an adjuvant by stimulating B lymphocytes and T helper cell type 2 responses by inhibiting interleukin-12 production. The non-toxic B subunit (CTB) attaches to cells by binding to ganglioside GM1, making it a useful label for microglial cells in neurological research. It has also proved to be an excellent tracer for axonal transport studies using immunohistochemical methods.

Application

Cholera Toxin from Vibrio cholerae has been used as a positive control in cAMP (cyclic AMP) assay for enterotoxins. It has been added as a supplement in cell culture media of primary tumors and epithelial cells.
Cholera Toxin from Vibrio cholerae has been used in toxin neutralization assays to assess the cytotoxicity of cells.

Features and Benefits

This compound is a featured product for Cyclic Nucleotide research. Click here to discover more featured Cyclic Nucleotide products. Learn more about bioactive small molecules for other areas of research at sigma.com/discover-bsm.

Packaging

Package size based on protein content.

Physical form

Lyophilized powder containing Tris buffer salts, sodium chloride, sodium azide and sodium EDTA

Reconstitution

When reconstituted at 1 mg/mL in water, solution will contain 0.05 M Tris buffer salts, pH 7.5, 0.2 M NaCl, 0.003 M NaN3, and 0.001 M sodium EDTA. Store reconstituted solutions in the refrigerator.

Pictograms

Skull and crossbones

Signal Word

Danger

Hazard Statements

Hazard Classifications

Acute Tox. 2 Dermal - Acute Tox. 2 Oral - Acute Tox. 4 Inhalation - Aquatic Chronic 3

WGK

WGK 3


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Structure, biological functions and applications of the AB5 toxins
Beddoe T, et al.
Trends in Biochemical Sciences, 35, 411-418 (2010)
Ligand-dependent corepressor contributes to transcriptional repression by C2H2 zinc-finger transcription factor ZBRK1 through association with KRAB-associated protein-1.
Calderon MR et al.
Nucleic Acids Research, 42, 7012-7012 (2014)
The enterotoxin T (BcET) from Bacillus cereus can probably not contribute to food poisoning.
Choma C and Granum PE
FEMS Microbiology Letters, 217, 115-115 (2002)
Contribution of CXCL12 secretion to invasion of breast cancer cells.
Boimel PJ et al.
Breast Cancer Research, 14, R23-R23 (2012)
A recombinant probiotic for treatment and prevention of cholera
Focareta A, et al.
Gastroenterology, 130, 1688-1695 (2006)

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