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Title: Antibacterial Properties of Metallocenyl-7-ADCA Derivatives and Structure in Complex with CTX-M β-Lactamase

Journal Article · · Organometallics

We report a series of six novel metallocenyl-7-ADCA (metallocenyl = ferrocenyl or ruthenocenyl; 7-ADCA = 7- aminodesacetoxycephalosporanic acid) conjugates were synthesized and their antibacterial properties evaluated by biochemical and microbiological assays. The ruthenocene derivatives showed a higher level of inhibition of DDcarboxypeptidase 64-575, a penicillin binding protein (PBP), than the ferrocene derivatives and the reference compound penicillin G. Protein X-ray crystallographic analysis revealed a covalent acyl–enzyme complex of a ruthenocenyl compound with CTX-M β-lactamase E166A mutant, corresponding to a similar complex with PBPs responsible for the bactericidal activities of these compounds. Most interestingly, an intact compound was captured at the crystal-packing interface, elucidating for the first time the structure of a metallocenyl β-lactam compound that previously eluded small-molecule crystallography. We propose that protein crystals, even from biologically unrelated molecules, can be utilized to determine structures of small molecules.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
National Institutes of Health (NIH); National Science Centre of Poland (NCN)
Grant/Contract Number:
DEC-2013/11/B/ ST5/00997
OSTI ID:
1463718
Journal Information:
Organometallics, Vol. 36, Issue 9; ISSN 0276-7333
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

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Quinoline and ferrocene conjugates: Synthesis, computational study and biological evaluations: Quinoline-ferrocene conjugates journal November 2018
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