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Glucosylation of Ras by Clostridium sordellii lethal toxin: consequences for effector loop conformations observed by NMR spectroscopy

Geyer, Matthias ; Wilde, Christian ; Selzer, Jörg ; Aktories, Klaus ; Kalbitzer, Hans Robert


The lethal toxin (LT) from Clostridium sordellii, which belongs to the family of large clostridial cytotoxins, acts as a monoglucosyltransferase for the Rho subfamily GTPase Rac and also modifies Ras. In the present study we investigated structural changes of H-Ras in its di- and triphosphate form that occur upon glucosylation of the effector domain amino acid threonine-35 by LT. (31)P NMR ...


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