Staphylococcus cell wall

The Staphylococcus cell wall is a robust, multi-layered structure essential for bacterial survival, primarily composed of a thick peptidoglycan layer (up to 50% of cell mass) and secondary polymers like wall teichoic acids (WTA) (Swoboda et al., 2010, ChemBioChem). Its fundamental biological role is to maintain cell shape and provide osmotic stability, preventing lysis under high internal pressure (Silhavy et al., 2010, Cold Spring Harbor Perspectives in Biology). Beyond structural support, the cell wall serves as a scaffold for surface proteins (MSCRAMMs) that facilitate adhesion to host tissues and evasion of the immune system during infections (Foster et al., 2014, Nature Reviews Microbiology). Clinically, it is a premier therapeutic target; beta-lactam antibiotics inhibit the transpeptidase enzymes (penicillin-binding proteins) that cross-link peptidoglycan, while glycopeptides like vancomycin bind directly to the D-Ala-D-Ala terminus of precursors to block polymerization (Kohanski et al., 2010, Nature Reviews Microbiology). The evolution of the cell wall—specifically the acquisition of the mecA gene encoding PBP2a—is the primary driver of methicillin resistance (MRSA), making it a focal point of global infectious disease research (Fishovitz et al., 2014, IUBMB Life).

Other names

Staphylococcal cell wallPeptidoglycan layerGram-positive cell wallBacterial cell envelope

Inhibition of peptidoglycan biosynthesis by binding to penicillin-binding proteins (PBPs) to prevent transpeptidation, or by binding to the D-alanyl-D-alanine terminus of cell wall precursors to inhibit polymerization and cross-linking.