Increased energy demand from anabolic-catabolic processes drives β-lactam antibiotic lethality
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1-s2.0-S2451945621005249-main.pdf
Description
Published version
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2.56 MB
Format
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Checksum (MD5)
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Author(s)
Lobritz, Michael A
Andrews, Ian W
Braff, Dana
Porter, Caroline BM
Gutierrez, Arnaud
Furuta, Yoshikazu
Cortes, Louis BG
Ferrante, Thomas
Bening, Sarah C
Wong, Felix
Date Issued
2022
Journal
Cell Chemical Biology
Publisher
Elsevier BV
Citation
Lobritz, Michael A, Andrews, Ian W, Braff, Dana, Porter, Caroline BM, Gutierrez, Arnaud et al. 2022. "Increased energy demand from anabolic-catabolic processes drives β-lactam antibiotic lethality." Cell Chemical Biology, 29 (2).
Version
Final published version
Abstract
β-Lactam antibiotics disrupt the assembly of peptidoglycan (PG) within the bacterial cell wall by inhibiting the enzymatic activity of penicillin-binding proteins (PBPs). It was recently shown that β-lactam treatment initializes a futile cycle of PG synthesis and degradation, highlighting major gaps in our understanding of the lethal effects of PBP inhibition by β-lactam antibiotics. Here, we assess the downstream metabolic consequences of treatment of Escherichia coli with the β-lactam mecillinam and show that lethality from PBP2 inhibition is a specific consequence of toxic metabolic shifts induced by energy demand from multiple catabolic and anabolic processes, including accelerated protein synthesis downstream of PG futile cycling. Resource allocation into these processes is coincident with alterations in ATP synthesis and utilization, as well as a broadly dysregulated cellular redox environment. These results indicate that the disruption of normal anabolic-catabolic homeostasis by PBP inhibition is an essential factor for β-lactam antibiotic lethality.
MIT Department
Massachusetts Institute of Technology. Department of Biology
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
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DOI of Published Version
https://doi.org/10.1016/J.CHEMBIOL.2021.12.010
