Interaction of cinnamyl‐tRNAPhe with Escherichia coli elongation factor Tu

Abstract
The products of nitrous acid mediated‐deamination of Phe‐tRNAPhe from E. coli were analyzed and their capability to interact with elongation factor Tu from E. coli was investigated. Thin‐layer chromatography as well as HPLC analysis revealed the existence of at least two deamination products, 3‐phenyllactyl‐tRNAPhe and cinnamyl‐tRNAPhe. It could be shown that the aminoacyl‐tRNA analogues were active in the formation of the ternary complex with EF‐Tu·GTP, although with a lower efficiency than native Phe‐tRNAPhe. For both modified acyl‐tRNAs the dissociation constant was determined to be 3 × 10−5 M.

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