Biosynthesis of Ergothioneine and Hercynine by Fungi and Actinomycetales
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TLDR
The unusual position of yeasts as fungi is indicated by the inability of all yeastlike Ascomycetes and all except a few false yeasts to synthesize these two betaines.Abstract:
Unlike other bacteria, aerobic members of the order Actinomycetales show a close biochemical relationship to the fungi by their capacity to synthesize hercynine and ergothioneine. The myxomycete Physarum polycephalum, possessing the same synthetic ability, also shows this relationship. Contrariwise, the unusual position of yeasts as fungi is indicated by the inability of all yeastlike Ascomycetes and all except a few false yeasts to synthesize these two betaines.read more
Citations
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Novel thiols of prokaryotes.
TL;DR: Novel thiols found in those bacteria lacking glutathione are included, including glutathion amide and its perthiol, produced by phototrophic purple sulfur bacteria and apparently involved in their sulfide metabolism.
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Dietary sources and antioxidant effects of ergothioneine.
TL;DR: Only some food contained ergothioneine with highest concentrations detected in specialty mushrooms, kidney, liver, black and red beans, and oat bran, indicting that ergothsioneine is not involved in the intracellular antioxidant thiol defense system.
Journal ArticleDOI
The unusual amino acid L -ergothioneine is a physiologic cytoprotectant
Bindu D. Paul,Solomon H. Snyder +1 more
TL;DR: Using RNA interference, cells lacking ETT are more susceptible to oxidative stress, resulting in increased mitochondrial DNA damage, protein oxidation and lipid peroxidation, and ET may represent a new vitamin whose physiologic roles include antioxidant cytoprotection.
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Glutathione analogs in prokaryotes
TL;DR: Bacteria have evolved a diverse collection of low-molecular-weight protective thiols to deal with oxygen toxicity and environmental challenges.
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Contents of lovastatin, γ-aminobutyric acid and ergothioneine in mushroom fruiting bodies and mycelia
TL;DR: Lovastatin, γ-aminobutyric acid (GABA) and ergothioneine were analysed in mushrooms and the Pleurotus genus contained considerably high amount of ergothionine, which might be related to their beneficial effects.
References
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Carbon Assimilation Tests for the Classification of Yeasts
TL;DR: A more adequate basal medium and a greater number of carbon compounds have been employed than were used by earlier investigators, with the result that this type of biochemical test is proving to be the best that has been developed for the classification of the yeasts.
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Ergothioneine in microorganisms.
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Biosynthesis of ergothioneine and hercynine by mycobacteria
TL;DR: The pathway of ergothioneine biosynthesis in mycobacteria, as judged by the use S(35)-sulfate and l-histidine-2-C(14) as tracers, appears similar to that found in Neurospora crassa and Claviceps purpurea, that is, from histidine to ergothionine via hercynine.
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The Reaction Sequence in Ergothioneine Biosynthesis: Hercynine as an Intermediate
TL;DR: Data is provided which show that hercynine is an intermediate compound in the biosynthesis of ergothioneine, an immediate precursor of the sulfur atom of the thiolimidazole ring.
Journal ArticleDOI
Organic requirements and synthetic media for growth of the myxomycete physarum polycephalum.
TL;DR: Optimal concentrations of the absolute organic requirements, identified as d- or l-methionine, biotin, thiamine, and hematin as previously reported, were established and Glycine was highly stimulatory in a minimal medium.
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