Abstract
Ribosome-inactivating proteins (RIPs) constitute a diverse group of proteins that share an RNA N-glycosidase activity that acts very specifically on the ribosomal RNA of the 50S/60S ribosomal subunit to inhibit protein synthesis. Additionally, the majority of RIPs act on non-ribosomal RNA and DNA in a sequence context-independent fashion, releasing multiple adenines and sometimes guanines. One such activity depends on the presence of a 5′ cap structure, and may be responsible for the anti-viral properties of some RIPs. In addition to their N-glycosidase activity on nucleic acids, some ribosome-inactivating enzymes have been reported to be bifunctional with another, unrelated activity. No active sites for these unrelated activities have been found, and their presence in preparations of RIPs may be due to contamination.
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Hartley, M.R. (2010). Enzymatic Activities of Ribosome-Inactivating Proteins. In: Lord, J., Hartley, M. (eds) Toxic Plant Proteins. Plant Cell Monographs, vol 18. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-12176-0_3
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DOI: https://doi.org/10.1007/978-3-642-12176-0_3
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