It has been known that ribosome-inactivating proteins (RIPs) from plants damage ribosomes by removing adenine from a precise position of rRNA. Subsequently it was observed that all tested RIPs depurinate DNA, and some of them also non-ribosomal RNAs and poly(A), hence the denomination of adenine polynucleotide glycosylases was proposed. We report now that ricin, saporin-L2, saporin-S6, gelonin and momordin depurinate also poly(ADP-ribosyl)ated poly(ADP-ribose) polymerase (auto modified enzyme), an enzyme involved in DNA repair. We observed also that all RIPs but gelonin induce transformation of fibroblasts, possibly as a consequence of damage to DNA and of the altered DNA repair system. © 2003 Published by Elsevier Science B.V. on behalf of the Federation of European Biochemical Societies.
Barbieri, L., Brigotti, M., Perocco, P., Carnicelli, D., Ciani, M., Mercatali, L., & Stirpe, F. (2003). Ribosome-inactivating proteins depurinate poly(ADP-ribosyl)ated poly(ADP-ribose) polymerase and have transforming activity for 3T3 fibroblasts. FEBS Letters, 538(1–3), 178–182. https://doi.org/10.1016/S0014-5793(03)00176-5