Arsenic biotransformation by a cyanobacterium Nostoc sp. PCC 7120

Environmental Pollution
Xi-Mei XueYong-Guan Zhu

Abstract

Nostoc sp. PCC 7120 (Nostoc), a typical filamentous cyanobacterium ubiquitous in aquatic system, is recognized as a model organism to study prokaryotic cell differentiation and nitrogen fixation. In this study, Nostoc cells incubated with arsenite (As(III)) for two weeks were extracted with dichloromethane/methanol (DCM/MeOH) and the extract was partitioned between water and DCM. Arsenic species in aqueous and DCM layers were determined using high performance liquid chromatography - inductively coupled plasma mass spectrometer/electrospray tandem mass spectrometry (HPLC-ICPMS/ESIMSMS). In addition to inorganic arsenic (iAs), the aqueous layer also contained monomethylarsonate (MAs(V)), dimethylarsinate (DMAs(V)), and the two arsenosugars, namely a glycerol arsenosugar (Oxo-Gly) and a phosphate arsenosugar (Oxo-PO4). Two major arsenosugar phospholipids (AsSugPL982 and AsSugPL984) were detected in DCM fraction. Arsenic in the growth medium was also investigated by HPLC/ICPMS and shown to be present mainly as the inorganic forms As(III) and As(V) accounting for 29%-38% and 29%-57% of the total arsenic respectively. The total arsenic of methylated arsenic, arsenosugars, and arsenosugar phospholipids in Nostoc cells with increasing ...Continue Reading

Citations

May 25, 2020·Environmental Science and Pollution Research International·Feng ZhuYu Yan
Oct 3, 2020·International Journal of Molecular Sciences·Maciej CiebiadaMaurycy Daroch
Dec 23, 2020·The Science of the Total Environment·Jinyu CuiWeiwen Zhang
Feb 16, 2021·Environmental Science and Pollution Research International·Sana IrshadQaisar Mahmood
Mar 13, 2021·Journal of Toxicology and Environmental Health. Part B, Critical Reviews·Elida Cristina Monteiro De OliveiraBoscolli Barbosa Pereira
Apr 1, 2021·Environmental Science & Technology·Ronald A GlabonjatKevin A Francesconi
Dec 12, 2018·Environmental Science & Technology·Xi-Mei XueYong-Guan Zhu

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