ArticleMolecular microbiology2022
Localization and interaction studies of the Salmonella enterica ethanolamine ammonia-lyase (EutBC), its reactivase (EutA), and the EutT corrinoid adenosyltransferase.
Article in Molecular microbiology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 7 citations in OpenAlex.
- PvrA-Mediated Inhibition of Choline and Ethanolamine Uptake PromotesPathogens (Basel, Switzerland) · 2026Article
- Squama Manitis Extract Exhibits Broad-Spectrum Antibacterial Activity Through Energy and DNA Disruption Mechanisms.Biology · 2025Article
- IntegrativemSystems · 2024Article
- Machine learning analysis of RB-TnSeq fitness data predicts functional gene modules inmSystems · 2024Article
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2 authors at 1 institution in 1 country.
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Abstract
Some prokaryotes compartmentalize select metabolic capabilities. Salmonella enterica subspecies enterica serovar Typhimurium LT2 (hereafter S. Typhimurium) catabolizes ethanolamine (EA) within a proteinaceous compartment that we refer to as the ethanolamine utilization (Eut) metabolosome. EA catabolism is initiated by the adenosylcobalamin (AdoCbl)-dependent ethanolamine ammonia-lyase (EAL), which deaminates EA via an adenosyl radical mechanism to yield acetaldehyde plus ammonia. This adenosyl radical can be quenched, requiring the replacement of AdoCbl by the ATP-dependent EutA reactivase. During growth on ethanolamine, S. Typhimurium synthesizes AdoCbl from cobalamin (Cbl) using the ATP:Co(I)rrinoid adenosyltransferase (ACAT) EutT. It is known that EAL localizes to the metabolosome, however, prior to this work, it was unclear where EutA and EutT localized, and whether they interacted with EAL. Here, we provide evidence that EAL, EutA, and EutT localize to the Eut metabolosome, and that EutA interacts directly with EAL. We did not observe interactions between EutT and EAL nor between EutT and the EutA/EAL complex. However, growth phenotypes of a ΔeutT mutant strain show that EutT is critical for efficient ethanolamine catabolism. This work provides a preliminary understanding of the dynamics of AdoCbl synthesis and its uses within the Eut metabolosome.
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