Required for maturation of 30S ribosomal subunits, probably at a late stage of ribosomal protein binding, while Era is associated and after RimM (PubMed:20188109). Associates with free 30S subunits, but not with free 50S subunits or with mature ribosomes. Cells lacking this gene show a reduced growth rate, especially at high temperatures. They show a reduced amount of 70S ribosomes engaged in translation and a corresponding increase in the amount of free ribosomal subunits. Belongs to the RimP family. Extended N-terminus.