RT info:eu-repo/semantics/article T1 Effects of ribosome-inactivating proteins on Escherichia coli and Agrobacterium tumefaciens translation systems. A1 Girbés Juan, Tomás A1 Barbieri, Luigi A1 Ferreras Rodríguez, José Miguel A1 Arias Vallejo, Francisco Javier A1 Iglesias Álvarez, María del Rosario A1 Alegre, Carlos A1 Escarmis, Cristina A1 Stirpe, Fiorenzo K1 Ribosome-inactivating proteins K1 Proteínas inactivadoras de ribosomas K1 Escherichia coli K1 Agrobacterium tumefaciens AB The effects of 30 type 1 and of 2 (ricin and volkensin) type 2 ribosome-inactivating proteins (RIPs) on Escherichia coli and Agrobacterium tumefaciens cell-free translation systems were compared with the effects on a rabbit reticulocyte translation system. The depurinating activity of RIPs on E. coli ribosomes was also evaluated. Only six type 1 RIPs inhibited endogenous mRNA-directed translational activity of E. coli lysates, with submicromolar 50% inhibitory concentrations. Four RIPs had similar activities on poly(U)-directed phenylalanine polymerization by E. coli ribosomes, and three RIPs inhibited poly(U)-directed polyphenylalanine synthesis by A. tumefaciens ribosomes, with submicromolar 50% inhibitory concentrations. PB American Society for Microbiology SN 0021-9193 YR 1993 FD 1993 LK http://uvadoc.uva.es/handle/10324/40998 UL http://uvadoc.uva.es/handle/10324/40998 LA eng NO Journal of Bacteriology, 1993, vol. 175, n. 20. p. 6721-6724 NO Producción Científica DS UVaDOC RD 22-nov-2024