Molecular Classification
Polymer, Cell wall component
Disease Roles
Infection

Bacterial cell wall peptidoglycan Overview

Peptidoglycan is a complex, mesh-like polymer that forms the primary structural component of most bacterial cell walls. It is composed of alternating N-acetylglucosamine (GlcNAc) and N-acetylmuramic acid (MurNAc) sugars, cross-linked by short peptide chains. It provides mechanical strength, maintains cell shape, and protects bacteria from osmotic lysis. Its biosynthesis is a major target for antibiotics.

Mechanism of Action

Inhibition of peptidoglycan synthesis (e.g., transpeptidase inhibition by β-lactams, preventing cross-linking)

Biological Functions

Structural support
Osmotic pressure regulation
Cell shape maintenance
Protection against environmental stress

Disease Associations

Infection

Safety Considerations

  • Antibiotic resistance development
  • Variations in peptidoglycan structure can lead to resistance

Interacting Drugs

Penicillin
β-lactam antibiotics
Glycopeptides