Penicillinase

Penicillinase is a beta-lactamase. beta-lactamase enzymes inactivate beta-lactam antibiotics by hydrolyzing the peptide bond of the characteristic four-membered beta-lactam ring rendering the antibiotic ineffective [1] .

Nafcillin sodium monohydrate (CL 8491) is the sodium salt form of nafcillin, a semi-synthetic naphthalene, penicillin-related Nafcillin inhibits bacterial wall synthesis by a mechanism of action similar to penicillin. Penicillinase-resistant Nafcillin is used to treat infections caused by penicillin-resistant strains of Staphylococci.

Pipacycline is a tetracycline antibiotic derivative. It inhibits the formation of penicillinase, the enzyme that inactivates penicillin in bacteria. It decreases oxygen uptake and inhibits growth of penicillin-resistant penicillinase-producing S. aureus.

Bharangin is a inhibitor of penicillinase enzyme in E coli.