Demonstration of RNA N‐Glycosidase Activity of a Vero Toxin (VT2 Variant) Produced by Escherichia coli 091: H21 from a Patient with the Hemolytic Uremic Syndrome

Abstract
A new Vero toxin purified from Escherichia coli O91: H21 isolated from a patient with the hemolytic uremic syndrome (VT2vh) was shown to inhibit elongation factor 1‐dependent aminoacyl‐tRNA binding to ribosomes, resulting in inhibition of protein synthesis in rabbit reticulocytes. VT2vh, like Shiga toxin, VT1 and VT2, showed RNA N‐glycosidase activity and cleaved the N‐glycosidic bond of the adenosine residue at position 4324 in 28S ribosomal RNA.

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