@article{fdi:010094828,
  title = {{M}ethylmercury carbon isotope fractionation during biotic methylation by the bacterial {B}er{O}c1 strain},
  author = {{M}alberti-{Q}uintero, {L}. {M}. and {X}ue, {J}. {P}. and {G}uyoneaud, {R}. and {K}leindienst, {A}. and {L}agane, {C}hristelle and {L}affont, {L}. and {S}onke, {J}. {E}. and {P}edrero, {Z}. and {T}essier, {E}. and {A}mouroux, {D}. and {P}oint, {D}avid},
  editor = {},
  language = {{ENG}},
  abstract = {{B}iotic methylation of inorganic mercury (i{H}g) in aquatic systems is largely driven by microorganisms such as sulfate-reducing bacteria ({SRB}). {U}sing the {SRB} model strain {P}seudodesulfovibrio hydrargyri {B}er{O}c1 we investigated biotic i{H}g methylation aiming to assess the rates of mono-methylmercury ({CH}3{H}g) production and to characterize the carbon ({C}) isotopic signatures (delta 13{C}) of the {CH}3{H}g product. {B}iogenic{CH}3{H}g exhibited delta 13{C} values averaging -23.1 +/- 2.0 parts per thousand, representing a 13{C}-depletion of 14.4 parts per thousand compared to the pyruvate carbon source used for the growing of the strain and a 9 parts per thousand depletion relative to the microbial biomass. {T}he maximum methylation yield observed in our samples was around 15% of the available i{H}g and a constant {C} isotope fractionation was detected over time. {W}e propose that the methyl group is metabolically transferred from the carbon sources to cobalamin in the {H}gc{A} protein and subsequently to inorganic mercury (i{H}g), leading to consistent light {C} isotope enriched {CH}3{H}g signatures.},
  keywords = {},
  booktitle = {},
  journal = {{NPJ} {C}lean {W}ater},
  volume = {8},
  numero = {1},
  pages = {68 [8 p.]},
  ISSN = {2059-7037},
  year = {2025},
  DOI = {10.1038/s41545-025-00500-3},
  URL = {https://www.documentation.ird.fr/hor/fdi:010094828},
}