[Features of the structure of transfer RNA coded by bacteriophage T5].

Nucleotide sequence of 24 genes for the bacteriophage T5 tRNAs specific for all amino acids involved in protein synthesis was determined. All of them, except tRNA(Pro), were shown to differ significantly from the generalized "clover-leaf" structure consisting in the displacement of invariant and semi-invariant residues, the absence of pairing in the stems and some other deviations from the canonical parameters of the model. Basing on the available information on the functional activity of the phage-specific tRNAs, one can put forward a suggestion that, at least for some of them, the above anomalies do not essentially influence their activity. A comparison of phage T5 tRNAs with the Escherichia coli and phage T4 counterparts was carried out. The majority of the known elements determining the specificity of E. coli tRNA aminoacylation was also found in all phage T5 tRNAs, except tRNAPhe).