One of several proteins that assist in the late maturation steps of the functional core of the 30S ribosomal subunit. Helps release RbfA from mature subunits. May play a role in the assembly of ribosomal proteins into the subunit. Circularly permuted GTPase that catalyzes slow GTP hydrolysis, GTPase activity is stimulated by the 30S ribosomal subunit. Binds 1 zinc ion per subunit. Monomer. Associates with 30S ribosomal subunit, binds 16S rRNA. Belongs to the TRAFAC class YlqF/YawG GTPase family. RsgA subfamily. Truncated N-terminus.