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Effet des métaux sur la méthylation du mercure chez les bactéries

Abstract : Methylmercury is a neurotoxin, higly bioaccumulated in the food chain. The biotic processes of methylation of mercury are very well known. The effects of thiols and metals on Hg methylation is no longer debatable. However, the nature of these effects remains to be fully understood. This report present an overview of what is known about mercury and its biogeochemical cycle. Then, the effect of parameters, in particular metals on Hg methylation will be presented. The cases of Selenium, Iron, Zinc, Cadmium and Copper will be discussed. It should be noted that the effect of other metals on Hg methylation (not listed in this report) are unknown and requires further research. Finally, the methylation of mercury can be inhibited or improved depending on the concentration of metals to which a methylator is exposed. This means that the presence of commonly used hgcAB reporter genes is not necessarily indicative of the amount of methylmercury that a bacterial community can produce.
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Contributor : Yannick Dahetze Connect in order to contact the contributor
Submitted on : Monday, November 29, 2021 - 1:26:19 PM
Last modification on : Sunday, June 26, 2022 - 3:21:59 AM


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  • HAL Id : hal-03454795, version 1



yannick Dahetze. Effet des métaux sur la méthylation du mercure chez les bactéries. [Travaux universitaires] Pau. Université de Pau et des Pays de l'Adour (UPPA), FRA. 2020. ⟨hal-03454795⟩



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