4KQO image
Deposition Date 2013-05-15
Release Date 2013-11-06
Last Version Date 2024-10-30
Entry Detail
PDB ID:
4KQO
Title:
Crystal structure of penicillin-binding protein 3 from pseudomonas aeruginosa in complex with piperacillin
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.31 Å
R-Value Free:
0.24
R-Value Work:
0.21
R-Value Observed:
0.21
Space Group:
P 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Penicillin-binding protein 3
Gene (Uniprot):ftsI
Chain IDs:A, B
Chain Length:564
Number of Molecules:2
Biological Source:Pseudomonas aeruginosa
Primary Citation
Binding of (5S)-Penicilloic Acid to Penicillin Binding Protein 3.
Acs Chem.Biol. 8 2112 2116 (2013)
PMID: 23899657 DOI: 10.1021/cb400200h

Abstact

β-Lactam antibiotics react with penicillin binding proteins (PBPs) to form relatively stable acyl-enzyme complexes. We describe structures derived from the reaction of piperacillin with PBP3 (Pseudomonas aeruginosa) including not only the anticipated acyl-enzyme complex but also an unprecedented complex with (5S)-penicilloic acid, which was formed by C-5 epimerization of the nascent (5R)-penicilloic acid product. Formation of the complex was confirmed by solution studies, including NMR. Together, these results will be useful in the design of new PBP inhibitors and raise the possibility that noncovalent PBP inhibition by penicilloic acids may be of clinical relevance.

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Primary Citation of related structures