Structure and Mechanism of Ergothionase from Treponema denticola

Maurer, Alice and Leisinger, Florian and Lim, David and Seebeck, Florian P.. (2019) Structure and Mechanism of Ergothionase from Treponema denticola. Chemistry - A European Journal, 25 (44). pp. 10298-10303.

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Official URL: https://edoc.unibas.ch/75098/

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Ergothioneine is a sulfur-containing histidine derivative that emerges from microbial biosynthesis and enters the human body through intestinal uptake and regulated distribution into specific tissues. Although the proteins involved in biosynthesis and uptake are well characterized, less is known about the degradative pathways of ergothioneine. This report describes the crystal structure of the active form of ergothionase from the oral pathogen Treponema denticola complexed with the substrate analogue desmethyl-ergothioneine sulfonic acid. This enzyme catalyzes the 1,2-elimination of trimethylamine from ergothioneine and ergothioneine sulfonic acid by using a unique mode of substrate activation combined with acid/base catalysis. This structural and mechanistic investigation revealed four essential catalytic residues, which are strictly conserved in homologous proteins from common gastrointestinal bacteria and numerous pathogenic bacteria, suggesting that bacterial activity may play an important role in determining the availability of ergothioneine in healthy and diseased human tissue.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Molecular Bionics (Seebeck)
05 Faculty of Science > Departement Chemie > Former Organization Units Chemistry > Organische Chemie (Gademann)
UniBasel Contributors:Seebeck, Florian Peter
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:12 Jul 2020 01:30
Deposited On:11 Feb 2020 07:54

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