Pokeweed Antiviral Toxin

Source:
Phytolacca americana (Pokeweed)
CAS:
63231-57-2

I.U.B.: 1.4.3.6

Pokeweed antiviral toxin is a plant protein which has been shown to have both antiviral and cytotoxic activities. The site of action for the toxin has been shown in cell-free lysates to be at the ribosomes and specifically the Ef-2 mediated translocation step to the elongation cycle during protein synthesis. The protein isolated from the leaves exists as two forms, pokeweed antiviral protein (PAP) at a molecular weight of 29 kDa and PAP II at a molecular weight of 30 kDa. Classical plant toxins such as ricin or abrin are composed of two functionally active fragments. The A chain contains the toxic activity and the B chain gives the toxin a cell recognition and binding function to facilitate transport across the cell membrane. The A chain is not active until it is internalized by the cell, where it halts protein synthesis. Pokeweed antiviral toxin is a hemitoxin which has the A chain activity but lacks a B chain. Without the B chain to mediate cell membrane binding, the toxin cannot enter the cell. By conjugating the protein to a monoclonal antibody or a lectin, the substance can be bound to a cell membrane and internalized where it acts to inhibit protein synthesis.

Stability/Storage: Pokeweed antiviral toxin has extended stability when stored at -20°C. The toxin should be aliquoted upon receipt and stored frozen at -20°C.

Pokeweed Antiviral Toxin Products

Description
Activity
Code
Cat. #
Price
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Description
Pokeweed Antiviral Toxin
Source:
Phytolacca americana (Pokeweed)
Chromatographically purified. A solution in phosphate buffered saline, pH 7.4. Purity checked via SDS-PAGE.
Store at -20°C.
Dry Ice required
Code
PTX
Cat. #