Bacterial intracellular machinery

Bacterial intracellular machinery refers to the collective set of internal components and processes within a bacterial cell, including the ribosome, DNA replication apparatus, and various metabolic enzymes. While many traditional antibiotics and antimicrobial peptides (AMPs) target the bacterial cell wall or membrane, a specific subset of AMP analogs is designed to penetrate the cell and disrupt these internal systems. These intracellular-targeting agents, often proline-rich antimicrobial peptides (PrAMPs), typically utilize bacterial transporters like SbmA to gain entry into the cytoplasm. Once inside, they bind to high-affinity targets such as the 70S ribosome to inhibit translation or the DnaK chaperone to prevent proper protein folding. This multi-targeted or specific internal disruption is particularly effective against multi-drug resistant (MDR) bacteria, as it bypasses many common resistance mechanisms associated with the cell envelope. However, the therapeutic development of these analogs faces significant challenges, including ensuring selectivity over host machinery, maintaining stability against host proteases, and managing the emergence of resistance related to uptake pathways.

Other names

Bacterial internal machineryBacterial cytoplasmic targetsIntracellular bacterial targetsBacterial intracellular components

Inhibition of protein synthesis by binding to the 70S ribosome or inhibition of protein folding by binding to the DnaK chaperone.