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J. Biol. Chem., Vol. 262, Issue 4, 1430-1433, Feb, 1987

ADP-ribosylation of a Mr 21,000 membrane protein by type D botulinum toxin

Y Ohashi and S Narumiya

When crude membrane fraction from bovine adrenal gland was incubated with type D botulinum toxin in the presence of NAD, a membrane protein with a molecular weight of 21,000 was specifically ADP-ribosylated. This ADP-ribosylation occurred dependent on the dose of the toxin and was abolished by prior boiling ADP-ribose transfer to the membrane protein was significantly suppressed when agmatine and L-arginine methyl ester were included in the reaction mixture. Dithiothreitol stimulated this ADP-ribosylation about 3-fold. Incubation of membrane fractions from mouse brain and pancreas with this toxin also resulted in ADP-ribosylation of a protein of the same molecular weight. These results suggested that type D botulinum toxin catalyzed transfer of an ADP-ribose moiety of NAD to the specific membrane protein common to secretory cells.
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