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Infections caused by gram-negative bacteria, such as Pseudomonas aeruginosa, have been spreading worldwide. It is a threat to public health because of its multi-drug resistance and difficulty to treat. Therefore, the demand for developing antimicrobial agents to treat infections is increasing. One of them that is currently under development is cephalosporin derivative compounds. This research studied the three-dimensional (3D) interaction between antibiotics from cephalosporin derivatives and penicillin-binding proteins (PBPs) in P. aeruginosa. This study aimed to clarify whether the cephalosporin derivatives were effective in inhibiting the activity of P. aeruginosa. The PBPs structure was obtained from the Protein Data Bank (PDB ID: 5DF9). The structural sketch of the cephalosporin derivative was drawn using the Marvins Sketch, whereas the study on the interaction between antibiotics and PBPs was carried out using the Mollegro Virtual Docker 6.0 program. The results showed the lowest rerank score from five cephalosporin derivatives, namely cephalotin (-116,306), cephotetan (-133.605), cephoperazone (-160.805), cephpirome (-144.045), and cephtaroline fosamil (-146.398). Kata Kunci: antibiotics, cephalosporins, interaction study, PBP, P. aeruginosa Received: 01 November 2019 Accepted: 10 November 2020 Published: 13 January 2021 J Bioteknol Biosains Indones – Vol 7 No 2 Thn 2020

IN SILICO STUDY OF CEPHALOSPORIN DERIVATIVES TO INHIBIT THE ACTIONS OF Pseudomonas aeruginosa