Interaction of Glycyl-L-phenylalanine with Escherichia coli Phenylalanyl-tRNA Synthetase

Sidney M. Hecht, S. D. Hawrelak

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The interaction of glycyl-L-phenylalanine with the phenylalanyl-tRNA synthetase from Escherichia coli has been studied by the attempted enzymatic acylation of tRNA with the dipeptide and with the dipeptidyl-AMP anhydride. Also measured were inhibition of the formation of phenylalanyl-tRNAphe in the presence of glycyl-L-phenylalanine and the dipeptidyl-AMP analog, glycyl-L-phenylalaninol-AMP, as well as the inhibition of ATP-PP; exchange in the presence of certain amino alcohol-AMP analogs of aminoacyl adenylates. The results, which indicated specific recognition of the dipeptide and dipeptidyl-AMP anhydride by the phenylalanyl-tRNA synthetase, are of interest in terms of the mechanism by which preexisting proteins are excluded from incorporation onto tRNA.

Original languageEnglish (US)
Pages (from-to)4967-4975
Number of pages9
Issue number24
StatePublished - Nov 1 1974
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry


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