Interplay between arsenic and selenium biomineralization in Shewanella sp. O23S

Staicu, Lucian C.; Wójtowicz, Paulina; Molnár, Zsombor; Ruíz-Agudo, Encarnación; Gallego, José Luis; Baragaño, Diego; Pósfai, Mihály

doi:10.1016/j.envpol.2022.119451

Cited by 13 publications

(8 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the link between Se and S has also been shown in Shewanella sp. O23S, which is able to reduce

{SeO}_{4}^{2 -}

and

{SeO}_{3}^{2 -}

to Se 0 particles with variable S content (Staicu et al, 2022). Our results indicate that sulphur metabolism is important for selenite reduction in P. putida KT2440.…”

Section: Discussionmentioning

confidence: 99%

Production of selenium nanoparticles occurs through an interconnected pathway of sulphur metabolism and oxidative stress response in Pseudomonas putida KT2440

Avendaño¹,

Muñoz-Montero

Rojas‐Gätjens³

et al. 2023

Microbial Biotechnology

View full text Add to dashboard Cite

The soil bacterium Pseudomonas putida KT2440 has been shown to produce selenium nanoparticles aerobically from selenite; however, the molecular actors involved in this process are unknown. Here, through a combination of genetic and analytical techniques, we report the first insights into selenite metabolism in this bacterium. Our results suggest that the reduction of selenite occurs through an interconnected metabolic network involving central metabolic reactions, sulphur metabolism, and the response to oxidative stress. Genes such as sucA, D2HGDH and PP_3148 revealed that the 2-ketoglutarate and glutamate metabolism is important to convert selenite into selenium. On the other hand, mutations affecting the activity of the sulphite reductase decreased the bacteria's ability to transform selenite. Other genes related to sulphur metabolism (ssuEF, sfnCE, sqrR, sqr and pdo2) and stress response (gqr, lsfA, ahpCF and sadI) were also identified as involved in selenite transformation. Interestingly, suppression of genes sqrR, sqr and pdo2 resulted in the production of selenium nanoparticles at a higher rate than the wild-type strain, which is of biotechnological interest. The data provided in this study brings us closer to understanding the metabolism of selenium in bacteria and offers new targets for the development of biotechnological tools for the production of selenium nanoparticles.

show abstract

“…Moreover, the link between Se and S has also been shown in Shewanella sp. O23S, which is able to reduce

{SeO}_{4}^{2 -}

and

{SeO}_{3}^{2 -}

to Se 0 particles with variable S content (Staicu et al, 2022). Our results indicate that sulphur metabolism is important for selenite reduction in P. putida KT2440.…”

Section: Discussionmentioning

confidence: 99%

Production of selenium nanoparticles occurs through an interconnected pathway of sulphur metabolism and oxidative stress response in Pseudomonas putida KT2440

Avendaño¹,

Muñoz-Montero

Rojas‐Gätjens³

et al. 2023

Microbial Biotechnology

View full text Add to dashboard Cite

show abstract

“…There are many which are capable of transforming different species of Se by means of reduction-oxidation (redox) reactions, methylation, and demethylation processes (Eswayah et al, 2016). The microbial reduction of oxidized and soluble forms of Se (Se VI and Se IV ) to insoluble Se 0 has been previously described by bacteria of the genera Bacillus, Shewanella, Comamonas, Stenotrophomonas, Azospirillum, and Pseudomonas, among others (Figure 5; Kora, 2018;Vogel et al, 2018;Baggio et al, 2021;Staicu et al, 2022;Ruiz-Fresneda et al, 2023). Currently, the number of known Se VI reducing strains is lower than that of Se IV reducing ones.…”

Section: Microbial Interactions With Seleniummentioning

confidence: 92%

Impact of microbial processes on the safety of deep geological repositories for radioactive waste

et al. 2023

View full text Add to dashboard Cite

To date, the increasing production of radioactive waste due to the extensive use of nuclear power is becoming a global environmental concern for society. For this reason, many countries have been considering the use of deep geological repositories (DGRs) for the safe disposal of this waste in the near future. Several DGR designs have been chemically, physically, and geologically well characterized. However, less is known about the influence of microbial processes for the safety of these disposal systems. The existence of microorganisms in many materials selected for their use as barriers for DGRs, including clay, cementitious materials, or crystalline rocks (e.g., granites), has previously been reported. The role that microbial processes could play in the metal corrosion of canisters containing radioactive waste, the transformation of clay minerals, gas production, and the mobility of the radionuclides characteristic of such residues is well known. Among the radionuclides present in radioactive waste, selenium (Se), uranium (U), and curium (Cm) are of great interest. Se and Cm are common components of the spent nuclear fuel residues, mainly as 79Se isotope (half-life 3.27 × 105 years), 247Cm (half-life: 1.6 × 107 years) and 248Cm (half-life: 3.5 × 106 years) isotopes, respectively. This review presents an up-to-date overview about how microbes occurring in the surroundings of a DGR may influence their safety, with a particular focus on the radionuclide-microbial interactions. Consequently, this paper will provide an exhaustive understanding about the influence of microorganisms in the safety of planned radioactive waste repositories, which in turn might improve their implementation and efficiency.

show abstract

“… Biogenic Se 0 particles: (A) Extracellular Se 0 produced by a strain of Shewanella (related to Shewanella baltica ) via extracellular respiration (personal archive of Dr Staicu; growth conditions detailed in Staicu et al ( 2022 )); (B) intracellular Se 0 nanoparticles produced by the bacterial species Stenotrophomonas bentonitica (personal archive of Dr Merroun; growth conditions detailed in Ruiz‐Fresneda et al [ 2018 ]). …”

Section: Biological Synthesis Of Sementioning

confidence: 99%

“…(A) Day 1; (B) 6 months; (C) inset (panel B) of the cone tips after 6 months (personal archive of Dr Staicu). The incubation conditions are detailed in Staicu et al ( 2022 ).…”

Section: Allotropic Transitionmentioning

confidence: 99%

“…While the physico‐chemical methods rely mainly on the reduction of tetravalent selenite, SeO 3 2− /Se IV , the biological systems can reduce both selenite and hexavalent selenate, SeO 4 2− /Se VI , oxyanions to Se 0 . The formation of Se 0 by biological systems is considered a biomineralization process, mainly leading to an amorphous mineral phase (Staicu et al, 2022 ). Interestingly, elemental selenium has several different allotropes: two amorphous (red and black), three crystalline monoclinic (deep red), crystalline trigonal (or rhombohedral) selenium (metallic grey), orthorhombic selenium and three allotropes of crystalline cubic Se 0 (Fernández‐Martínez & Charlet, 2009 ).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Allotropy of selenium nanoparticles: Colourful transition, synthesis, and biotechnological applications

Ruiz-Fresneda

Staicu

Lazuén-López

et al. 2023

Microbial Biotechnology

Self Cite

View full text Add to dashboard Cite

Elemental selenium (Se 0 ) nanomaterials undergo allotropic transition from thermodynamically-unstable to more stable phases. This process is significantly different when Se 0 nanoparticles (NPs) are produced via physico-chemical and biological pathways. While the allotropic transition of physico-chemically synthesized Se 0 is fast (minutes to hours), the biogenic Se 0 takes months to complete. The biopolymer layer covering biogenic Se 0 NPs might be the main factor controlling this retardation, but this still remains an open question. Phylogenetically-diverse bacteria reduce selenium oxyanions to red amorphous Se 0 allotrope, which has low market value. Then, red Se 0 undergoes allotropic transition to trigonal (metallic grey) allotrope, the end product having important industrial applications (e.g. semiconductors, alloys). Is it not yet clear whether biogenic Se 0 presents any biological function, or it is mainly a detoxification and respiratory by-product. The better understanding of this transition would benefit the recovery of Se 0 NPs from secondary resources and its targeted utilization with respect to each allotropic stage. This review article presents and critically discusses the main physico-chemical methods and biosynthetic pathways of Se 0 (bio)mineralization. In addition, the article proposes a conceptual model for the resource recovery potential of trigonal selenium nanomaterials in the context of circular economy.

show abstract

Interplay between arsenic and selenium biomineralization in Shewanella sp. O23S

Cited by 13 publications

References 47 publications

Production of selenium nanoparticles occurs through an interconnected pathway of sulphur metabolism and oxidative stress response in Pseudomonas putida KT2440

Production of selenium nanoparticles occurs through an interconnected pathway of sulphur metabolism and oxidative stress response in Pseudomonas putida KT2440

Impact of microbial processes on the safety of deep geological repositories for radioactive waste

Allotropy of selenium nanoparticles: Colourful transition, synthesis, and biotechnological applications

Contact Info

Product

Resources

About