An essential GTPase which binds GTP, GDP and possibly (p)ppGpp with moderate affinity, with high nucleotide exchange rates and a fairly low GTP hydrolysis rate. Plays a role in control of the cell cycle, stress response, ribosome biogenesis and in those bacteria that undergo differentiation, in morphogenesis control. Monomer. Belongs to the TRAFAC class OBG-HflX-like GTPase superfamily. OBG GTPase family. Truncated N-terminus.