Binds the lower part of the 30S subunit head. Binds mRNA in the 70S ribosome, positioning it for translation (By similarity). spr0195 RS3_STRR6 rpsC 217 MGQKVHPIGMRVGIIRDWDAKWYAEKEYADYLHEDLAIRKFVQKELADAAVSTIEIERAVNKVNVSLHTAKPGMVIGKGGANVDALRAKLNKLTGKQVHINIIEIKQPDLDAHLVGEGIARQLEQRVAFRRAQKQAIQRAMRAGAKGIKTQVSGRLNGADIARAEGYSEGTVPLHTLRADIDYAWEEADTTYGKLGVKVWIYRGEVLPARKNTKGGK 30S ribosomal protein S3