6R3X

Structure of Pseudomonas aeruginosa Penicillin-Binding Protein 3 (PBP3) in complex with piperacillin

Summary for 6R3X

• Entry DOI: 10.2210/pdb6r3x/pdb
• Related: 3OC2 3PBO 4KQO 6HZR 6I1E
• Descriptor: Peptidoglycan D,D-transpeptidase FtsI, Piperacillin (Open Form) (3 entities in total)
• Functional Keywords: penicillin-binding protein, peptidoglycan, transpeptidase, hydrolase
• Biological source: Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)
• Total number of polymer chains: 1
• Total formula weight: 56950.90

Authors

Bellini, D.,Dowson, C.G. (deposition date: 2019-03-21, release date: 2020-02-19, Last modification date: 2024-01-24)

Primary citation

Bellini, D.,Koekemoer, L.,Newman, H.,Dowson, C.G.
Novel and Improved Crystal Structures of H. influenzae, E. coli and P. aeruginosa Penicillin-Binding Protein 3 (PBP3) and N. gonorrhoeae PBP2: Toward a Better Understanding of beta-Lactam Target-Mediated Resistance.
J.Mol.Biol., 431:3501-3519, 2019

PubMed Abstract: Even with the emergence of antibiotic resistance, penicillin and the wider family of β-lactams have remained the single most important family of antibiotics. The periplasmic/extra-cytoplasmic targets of penicillin are a family of enzymes with a highly conserved catalytic activity involved in the final stage of bacterial cell wall (peptidoglycan) biosynthesis. Named after their ability to bind penicillin, rather than their catalytic activity, these key targets are called penicillin-binding proteins (PBPs). Resistance is predominantly mediated by reducing the target drug concentration via β-lactamases; however, naturally transformable bacteria have also acquired target-mediated resistance by inter-species recombination. Here we focus on structural based interpretations of amino acid alterations associated with the emergence of resistance within clinical isolates and include new PBP3 structures along with new, and improved, PBP-β-lactam co-structures.

PubMed: 31301409
DOI: 10.1016/j.jmb.2019.07.010

Experimental method

X-RAY DIFFRACTION (1.59 Å)