Cutibacterium acnes 70S ribosome

The Cutibacterium acnes 70S ribosome is a large ribonucleoprotein complex essential for bacterial protein synthesis, composed of two subunits (30S and 50S) and distinctive for containing unique proteins (such as bS22 and bL37) not found in model organisms like Escherichia coli[1][2][5]. It is the direct molecular target of first-line antibiotics for acne, including tetracyclines (e.g., sarecycline) and lincosamides (e.g., clindamycin), which inhibit translation by binding at key sites critical for mRNA decoding and peptide elongation[1][3][6][9]. The ribosome’s structure and phylotype-specific differences influence antibiotic susceptibility and resistance, contributing to treatment response and microbiota balance on the skin[1][3][4][7]. Its critical role in C. acnes viability makes it a validated therapeutic target for infection-related and inflammatory skin conditions linked to this organism.

Other names

C. acnes ribosomeCutibacterium acnes ribosomal complexCutibacterium acnes 70S ribosomeCutibacterium acnes bacterial ribosomePropionibacterium acnes ribosome (historic name)

Inhibition of protein synthesis by binding to the 30S subunit (e.g., sarecycline) - Inhibition of peptide bond formation by binding to the 50S subunit (e.g., clindamycin) - Blockade of the mRNA decoding center (30S) and/or the nascent peptide exit tunnel (50S) which disrupts elongation of the peptide chain