S12-like family, 30S ribosomal protein S12 subfamily; S12 is located at the interface of the large and small ribosomal subunits of prokaryotes, chloroplasts and mitochondria, where it plays an important role in both tRNA and ribosomal subunit interactions. S12 is essential for maintenance of a pretranslocation state and, together with S13, functions as a control element for the rRNA- and tRNA-driven movements of translocation. Antibiotics such as streptomycin bind S12 and cause the ribosome to misread the genetic code.
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