Bacterial transcription-translation machinery (BTTM)

The bacterial transcription-translation machinery is the integrated system of enzymes and ribonucleoproteins responsible for converting genetic information into functional proteins. This machinery primarily consists of DNA-dependent RNA polymerase, which catalyzes the synthesis of mRNA, and the 70S ribosome (comprising 30S and 50S subunits), which facilitates the translation of mRNA into polypeptide chains. In the context of plasmids, these extrachromosomal elements hijack the host's machinery to express genes that often confer selective advantages, such as antibiotic resistance or virulence factors. Because this machinery is evolutionarily distinct from eukaryotic systems, it serves as a primary target for a wide range of antibiotics. Drugs like rifamycins target the transcription phase by binding to RNA polymerase, while macrolides, tetracyclines, and aminoglycosides target various stages of the translation process on the ribosome. Understanding the interaction between plasmids and the host machinery is critical for addressing the spread of mobile genetic elements that drive global antimicrobial resistance.

Other names

Bacterial gene expression apparatusProkaryotic transcription-translation systemBacterial protein synthesis machineryHost-plasmid expression system

Inhibition of DNA-dependent RNA polymerase to block transcription or binding to the 30S or 50S ribosomal subunits to inhibit protein translation.