Bacterial microcompartment-mediated ethanolamine metabolism in Escherichia coli urinary tract infection

Dadswell, Katherine, Creagh, Sinead, McCullagh, Edward, Liang, Mingzhi, Brown, Ian R., Warren, Martin J. ORCID:, McNally, Alan, MacSharry, John and Prentice, Michael B. (2019) Bacterial microcompartment-mediated ethanolamine metabolism in Escherichia coli urinary tract infection. Infection and Immunity, 87 (8). ISSN 0019-9567

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Urinary tract infections (UTIs) are common and in general are caused by intestinal uropathogenic Escherichia coli (UPEC) ascending via the urethra. Microcompartment- mediated catabolism of ethanolamine, a host cell breakdown product, fuels the competitive overgrowth of intestinal E. coli, both pathogenic enterohemorrhagic E. coli and commensal strains. During a UTI, urease-negative E. coli bacteria thrive, despite the comparative nutrient limitation in urine. The role of ethanolamine as a potential nutrient source during UTIs is understudied. We evaluated the role of the metabolism of ethanolamine as a potential nitrogen and carbon source for UPEC in the urinary tract. We analyzed infected urine samples by culture, highperformance liquid chromatography, reverse transcription-quantitative PCR, and genomic sequencing. The ethanolamine concentration in urine was comparable to the concentration of the most abundant reported urinary amino acid, D-serine. Transcription of the eut operon was detected in the majority of urine samples containing E. coli screened. All sequenced UPEC strains had conserved eut operons, while metabolic genotypes previously associated with UTI (dsdCXA, metE) were mainly limited to phylogroup B2. In vitro ethanolamine was found to be utilized as a sole source of nitrogen by UPEC strains. The metabolism of ethanolamine in artificial urine medium (AUM) induced metabolosome formation and provided a growth advantage at the physiological levels found in urine. Interestingly, eutE (which encodes acetaldehyde dehydrogenase) was required for UPEC strains to utilize ethanolamine to gain a growth advantage in AUM, suggesting that ethanolamine is also utilized as a carbon source. These data suggest that urinary ethanolamine is a significant additional carbon and nitrogen source for infecting E. coli strains.

Item Type: Article
Additional Information: Publisher Copyright: © 2019 Dadswell et al.
Uncontrolled Keywords: escherichia coli,ethanolamine,metabolosome,microcompartment,urinary tract infection,parasitology,microbiology,immunology,infectious diseases,sdg 3 - good health and well-being ,/dk/atira/pure/subjectarea/asjc/2400/2405
Faculty \ School: Faculty of Science
UEA Research Groups: Faculty of Medicine and Health Sciences > Research Centres > Norwich Institute for Healthy Aging
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Depositing User: LivePure Connector
Date Deposited: 20 Sep 2022 14:30
Last Modified: 19 Apr 2023 01:14
DOI: 10.1128/IAI.00211-19

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