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The existence of aminoacyl-tRNAs was predicted during the late 50s as molecules that transferspecific amino acids for protein synthesis. Today we know that, in addition to protein synthesis, thesemolecules can also participate in several other cellular functions. One of these aminoacyl-tRNAs,glutamyl-tRNA, can participate in at least three functions in bacteria: biosynthesis of glutaminyl-tRNA,tetrapyrroles and proteins. In this article we discuss how bacterial cells manage to distribute glutamyltRNAamong all these functions. Proteins involved in each pathway recognize different features of thetRNA which allows them to use only the correct glutamyl-tRNA species. Also, the formation of macromolecularcomplexes allows the utilization of each of these species by the correct proteins. This compartmentalizationis critical for bacterial fitness as it prevents the incorporation of intermediates in the incorrectpathway.(doi: 10.5562/cca1830

Glutamyl-tRNA in Bacteria. Multiple Identities for Multiple Functions