Staphylococcal accessory regulator A (SarA)

Staphylococcal accessory regulator A (SarA) is a global transcriptional regulator (winged helix DNA-binding protein) in Staphylococcus aureus, including MRSA, that modulates the expression of hundreds of genes involved in virulence, cell wall structure, and biofilm formation. SarA controls key pathogenic processes by both activating and repressing target genes, including those encoding toxins, adhesins, and enzymes relevant to the bacterial response to environmental stress and immune attack. It is critical for MRSA's persistence, especially in the context of biofilm-associated chronic infections and resistance to β-lactam antibiotics. Because of its central role in regulating virulence and resistance, SarA is widely investigated as a therapeutic target, although clinical inhibitors have not yet been established.

Other names

sarASarA protein

Drugs targeting SarA are intended to inhibit its DNA-binding/regulatory function, thereby disrupting regulation of virulence genes and biofilm formation, making MRSA more susceptible to immune clearance or antibiotics