This protein promotes the GTP-dependent binding of aminoacyl-tRNA to the A-site of ribosomes during protein biosynthesis. Monomer (By similarity). Interacts with BrxC (PubMed:33722570). Phosphorylated on Thr-385 in vitro by PrkC in the presence of poly-L-lysine or myelin basic protein, dephosphorylated by PrpC. Belongs to the TRAFAC class translation factor GTPase superfamily. Classic translation factor GTPase family. EF-Tu/EF-1A subfamily.