The antibiotic penicillin inhibits peptidoglycan formation by preventing the crosslink of the pentapeptide bridge between the amino acids attached to the N-acetylmuramic acid in one layer of peptidoglycan to the amino acids attached to the N-acetylmuramic acid in another layer of peptidoglycan. transisomerization transglycosylation transesterification transpeptidation transphosphorylation
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Step 1: Penicillin inhibits the formation of peptidoglycan, which is a major component of bacterial cell walls. Show more…
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Madhur L.
Penicillin inhibits cell wall formation in bacteria by blocking the active site of the transpeptidase enzyme, although it does not permanently modify the enzyme. Penicillin is therefore a reversible non-competitive inhibitor. Denaturing agent: Irreversible competitive inhibitor. Irreversible non-competitive inhibitor. Reversible competitive inhibitor.
How does penicillin work? Penicillin binds to penicillin-binding proteins, thus inhibiting the transpeptidation reaction during cell wall synthesis. Penicillin blocks the movement of cell peptidoglycan subunits from the cytoplasm to the exterior of the cell. Penicillin digests the peptidoglycan linkers between NAG and NAM residues, resulting in cell lysis.
Adi S.
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