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Staurosporine and gossypol are inhibitors of the function of peptide elongation factor 1 alpha from rabbit reticulocytes

. 1994 Mar ; 32 (3) : 545-54.

Language English Country England, Great Britain Media print

Document type Journal Article

As it has been found, the incubation of [gamma-32P]ATP with elongation factor--1 alpha purified from rabbit reticulocytes resulted in the phosphorylation of several substrate proteins /Tuhácková, Z. (1992) In: Rec. Adv. Cell. Mol. Biol. 4, 79-86, Peeters Press, Leuven/ (1). In the present paper chromatofocusing of the purified eEF-1 alpha demonstrates that the ATP-dependent protein kinase activity is associated with a single protein catalyzing the GTP-dependent binding of aminoacyl-tRNA to ribosomes. Both of these activities are inhibited by staurosporine and gossypol. The inhibition by GDP but not by GTP indicates a possible involvement of conformation changes also in the modulation of the protein kinase activity displayed by eEF-1 alpha.

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