Penicillin binding proteins
(重定向自Penicillin binding protein)
![Ribbon representation of the atomic structure of Penicillin Binding Protein 3 from Pseudomonas aeruginosa (PDB 3OC2),[1] image created with PyMol.](/Images/godic/202502/01/3OC2_Wiki2346.png")


Penicillin-binding proteins (PBPs) are a group of proteins that are characterized by their affinity for and binding of penicillin. They are a normal constituent of many bacteria; the name just reflects the way by which the protein was discovered. All β-lactam antibiotics (except for tabtoxinine-β-lactam, which inhibits glutamine synthetase) bind to PBPs, which are essential for bacterial cell wall synthesis.