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P7208 Sigma

Pertussis toxin from Bordetella pertussis

lyophilized powder

Synonym: Histamine-sensitizing factor, IAP, Islet Activating Protein, PTX, Pertussigen



Related Categories Bacteria, Bacteria-derived adjuvants, Bioactive Small Molecule Alphabetical Index, Bioactive Small Molecules, Cell Biology,
form   lyophilized powder
storage temp.   2-8°C
Gene Information   Bordetella pertussis Tohama I ... ptxA(2665068), ptxB(2665069), ptxC(2665408)


General description

Product is not activated. If activation is required, see Kaslow, et al., for suggested conditions.

Physical form

Lyophilized powder containing sodium chloride and sodium phosphate buffer salts


The toxin is released from B. pertussis in an inactive form. When the pertussis toxin B oligomer binds to the cell membrane, the S1 subunit of its A protomer becomes activated, perhaps through the action of glutathione and ATP. A protocol for activating pertussis toxin in vitro is given by Kaslow, et al.

Biochem/physiol Actions

Pertussis toxin catalyzes the ADP-ribosylation of the α subunits of the heterotrimeric guanine nucleotide regulatory proteins Gi, Go, and Gt. This prevents the G protein heterotrimers from interacting with receptors, thus blocking their coupling and activation. Since the Gα subunits remain in their GDP-bound, inactive state, they are unable to inactivate adenylyl cyclase or open K+ channels.

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.

This compound is featured on the G Proteins (Heterotrimeric) page of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.

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Safety & Documentation

Safety Information

GHS07  GHS07
Signal word 
Hazard statements 
Precautionary statements 
NONH for all modes of transport
WGK Germany 


Certificate of Analysis

Certificate of Origin

Protocols & Articles


Discover Bioactive Small Molecules for Cyclic Nucleotides

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Peer-Reviewed Papers


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