Microbial cell envelopes and intracellular macromolecules

Microbial cell envelopes and intracellular macromolecules represent the collective structural and functional components of pathogenic microorganisms that serve as the primary targets for antimicrobial therapy. The cell envelope, consisting of the cell wall (e.g., peptidoglycan in bacteria) and the cytoplasmic membrane, provides essential protection against osmotic pressure and environmental stress [1]. Intracellular macromolecules include the microbial genome (DNA), transcription machinery (RNA), and the translation apparatus (ribosomes), which are vital for the survival, growth, and replication of the pathogen [2]. Antimicrobial drugs are designed to exploit the biochemical differences between these microbial structures and human cells to achieve selective toxicity. For instance, beta-lactams and glycopeptides target cell wall assembly, while aminoglycosides and tetracyclines bind to microbial ribosomes to halt protein synthesis [3]. Understanding these targets is fundamental to the development of treatments for a wide range of bacterial, fungal, and parasitic infections. [1] Silhavy TJ, Kahne D, Walker S. The bacterial cell envelope. Cold Spring Harb Perspect Biol. 2010;2(5):a000414. [2] Kohanski MA, Dwyer DJ, Collins JJ. How antibiotics kill bacteria: from targets to networks. Nat Rev Microbiol. 2010;8(6):423-435. [3] Walsh C. Antibiotics: Actions, Origins, Resistance. Washington (DC): ASM Press; 2003.

Other names

Bacterial cell wall and cytoplasmic componentsMicrobial structural and functional macromolecules

Inhibition of cell wall synthesis, disruption of cell membrane integrity, inhibition of protein synthesis, and inhibition of nucleic acid synthesis