The Escherichia coli trmE (mnmE) gene, involved in tRNA modification, codes for an evolutionarily conserved GTPase with unusual biochemical properties.
Cabedo H, Macián F, Villarroya M, Escudero JC, Martínez-Vicente M, Knecht E, Armengod ME. EMBO J. 1999 Dec 15; 18(24):7063-76.