Staphylococcus aureus wall teichoic acid structure dictates virulence potential and resistance to host defenses.

SasF enzyme is essential for S. aureus resistance to skin fatty acids and is required for skin colonization and infection, highlighting its role in virulence.

• Why it matters: Understanding mechanisms of skin colonization and resistance in S. aureus can inform new therapeutic strategies against infections, as current treatments face rising resistance.
• What they did: The study characterized SasF as a glycoside epimerase that maintains wall teichoic acid structure, with mutants showing impaired skin colonization and infection in models.
• The result: Findings suggest SasF as a potential therapeutic target, as its activity is crucial for S. aureus surface chemistry and resistance, impacting its virulence.