This protein promotes the GTP-dependent binding of aminoacyl-tRNA to the A-site of ribosomes during protein biosynthesis. Localized in the cell wall of cortical and transmitting tissue cells of pollinated mature styles. Was detected in all tissues examined but was most abundant in roots and salt-adapted cultured cells. Belongs to the TRAFAC class translation factor GTPase superfamily. Classic translation factor GTPase family. EF-Tu/EF-1A subfamily.