The tRNA modification GTPase MnmE consists of three domains. An N-terminal domain, a helical domain and a GTPase domain which is nested within the helical domain. This family represents the helical domain [1-2].

1: The GTPase activity and C-terminal cysteine of the Escherichia coli MnmE protein are essential for its tRNA modifying function. Yim L, Martinez-Vicente M, Villarroya M, Aguado C, Knecht E, Armengod ME; J Biol Chem. 2003;278:28378-28387. PMID:12730230

2: Kissing G domains of MnmE monitored by X-ray crystallography and pulse electron paramagnetic resonance spectroscopy. Meyer S, Bohme S, Kruger A, Steinhoff HJ, Klare JP, Wittinghofer A; PLoS Biol. 2009;7:e1000212. PMID:19806182