Sulfisoxazole Acetyl

Sulfisoxazole Acetyl (CAS No.: 80-74-0) is an acetylated derivative of the sulfonamide antibiotic sulfisoxazole and functions as a synthetic analog of para-aminobenzoic acid (PABA), placing it within the class of small-molecule inhibitors targeting bacterial folate biosynthesis. This compound exerts its biological activity through competitive inhibition of the bacterial enzyme dihydropteroate synthase, thereby blocking the incorporation of PABA into dihydrofolic acid and disrupting the downstream production of folic acid, purines, and pyrimidines essential for nucleic acid synthesis. As a result, sulfisoxazole acetyl induces bacteriostatic or bactericidal effects in susceptible microbial systems, making it a valuable tool compound for investigating folate-dependent metabolic pathways and antimicrobial resistance mechanisms. In vitro studies with sulfonamide analogs, including sulfisoxazole derivatives, typically demonstrate activity in the low micromolar to millimolar range depending on the organism and assay conditions. Sulfisoxazole acetyl is widely utilized in microbiological and biochemical research to evaluate enzyme inhibition, probe bacterial growth dynamics, and serve as a reference compound in antimicrobial screening assays, with experimental concentrations or dosing regimens varying according to specific study designs and model systems.