Ribosomal RNA in bacteria (rRNA (bacterial))

Ribosomal RNA in bacteria refers to specialized RNA molecules—primarily 16S, 23S, and 5S rRNA—that combine with ribosomal proteins to assemble the bacterial ribosome, the molecular machine responsible for translating messenger RNA (mRNA) into proteins[1][2][5]. The 16S rRNA forms the core of the small (30S) ribosomal subunit, while 23S and 5S rRNA are integral to the large (50S) subunit[1][5]. These RNA molecules provide both structural scaffolding and catalytic functions, facilitating mRNA decoding and peptide bond formation during protein synthesis[4][7]. Many clinically important antibiotics target bacterial rRNA directly, interfering with ribosomal function and thereby inhibiting protein synthesis—a basis for their antimicrobial activity and selectivity[1][5]. Mutations and modifications in ribosomal RNA are a significant molecular mechanism behind the development of antibiotic resistance in bacteria[1][4]. The 16S rRNA gene is widely used in molecular diagnostics and microbiology for phylogenetic analysis and bacterial identification[5][6].

Other names

Bacterial ribosomal RNA16S ribosomal RNA (16S rRNA)23S ribosomal RNA (23S rRNA)5S ribosomal RNA (5S rRNA)Prokaryotic ribosomal RNA

Inhibition of ribosomal subunit function (blocking mRNA translation); Inhibition of peptidyl transferase activity; Disruption of ribosomal subunit assembly