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Carbon monoxide-releasing antibacterial molecules target respiration and global transcriptional regulators

Davidge, K.S., Sanguinetti, G., Yee, C.H., Cox, A.G., McLeod, C.W., Monk, C.E., Mann, B.E., Motterlini, R. and Poole, R.K. (2009) Carbon monoxide-releasing antibacterial molecules target respiration and global transcriptional regulators. Journal of Biological Chemistry, 284 (7). pp. 4516-4524. ISSN 0021-9258

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Abstract

Carbon monoxide, a classical respiratory inhibitor, also exerts vasodilatory, anti-inflammatory, and antiapoptotic effects. CO-releasing molecules have therapeutic value, increasing phagocytosis and reducing sepsis-induced lethality. Here we identify for the first time the bacterial targets of Ru(CO)(3)Cl(glycinate) (CORM-3), a ruthenium-based carbonyl that liberates CO rapidly under physiological conditions. Contrary to the expectation that CO would be preferentially inhibitory at low oxygen tensions or anaerobically, Escherichia coli cultures were also sensitive to CORM-3 at concentrations equimolar with oxygen. CORM-3, assayed as ruthenium, was taken up by bacteria and rapidly delivered CO intracellularly to terminal oxidases. Microarray analysis of CORM-3-treated cells revealed extensively modified gene expression, notably down-regulation of genes encoding key aerobic respiratory complexes. Genes involved in metal metabolism, homeostasis, or transport were also differentially expressed, and free intracellular zinc levels were elevated. Probabilistic modeling of transcriptomic data identified the global transcription regulators ArcA, CRP, Fis, FNR, Fur, BaeR, CpxR, and IHF as targets and potential CO sensors. Our discovery that CORM-3 is an effective inhibitor and global regulator of gene expression, especially under aerobic conditions, has important implications for administration of CO-releasing agents in sepsis and inflammation

Item Type: Article
Copyright, Publisher and Additional Information: © 2009 American Society for Biochemistry and Molecular Biology. This is an author produced version of a paper subsequently published in the Journal of Biological Chemistry. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: ESCHERICHIA-COLI K-12; NITRIC-OXIDE; GENE-EXPRESSION; METAL-BINDING; ZINC; PROTEIN; SYSTEM; SIGNAL; COMPLEXES; MEMBRANE
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Computer Science (Sheffield)
The University of Sheffield > Faculty of Science (Sheffield) > School of Biological Sciences (Sheffield) > Department of Molecular Biology and Biotechnology (Sheffield)
The University of Sheffield > Faculty of Science (Sheffield) > Department of Chemistry (Sheffield)
Depositing User: Miss Anthea Tucker
Date Deposited: 04 Mar 2009 12:01
Last Modified: 08 Feb 2013 16:57
Published Version: http://dx.doi.org/10.1074/jbc.M808210200
Status: Published
Publisher: American Society for Biochemistry and Molecular Biology
Refereed: Yes
Identification Number: 10.1074/jbc.M808210200
URI: http://eprints.whiterose.ac.uk/id/eprint/7923

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