Examples of narrow spectrum antibacterials with their binding site function

Narrow spectrum antibacterialBinding site functionReferences
MethicillinCompetitively blocking the transpeptidase enzyme, which is a type of penicillin-binding proteins (PBPs).[74]
NafcillinSpecifically targets PBPs essential for cell wall synthesis, aiding in cross-linking peptidoglycan for wall rigidity.[75]
OxacillinThe binding site is shaped by loops near helix 5, affecting substrate affinity; variants like OXA-2 and OXA-51 bind better to carbapenems.[76]
CloxacillinBinds to serum albumin through hydrophobic interactions, with a 1:1 stoichiometry, as indicated by fluorescence spectroscopy studies.[77]