This protein promotes the GTP-dependent binding of aminoacyl-tRNA to the A-site of ribosomes during protein biosynthesis. Expressed at high levels in fully sporulated oocysts and merozoites. Low levels found in unsporulated oocysts. Absent in partially sporulated oocysts. Belongs to the TRAFAC class translation factor GTPase superfamily. Classic translation factor GTPase family. EF-Tu/EF-1A subfamily.