Interactions of microorganisms with rare earth ions and their utilization for separation and environmental technology

Moriwaki, Hiroshi; Yamamoto, Hiroki

doi:10.1007/s00253-012-4519-9

Cited by 82 publications

(69 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The loss of LtaS activity in B. subtilis impacts cell division, cell morphogenesis, and divalent cation homeostasis (6). In addition to these phenotypes, a quadruple ltaS homolog mutant shows a loss of LTA (7), an aberrant twisted morphology, slower growth (6), and reduced adsorption of rare earth elements (8,9). Moreover, we reported that D -dependent transcription of lytF, which encodes a DL-endopeptidase that functions in cell separation, is reduced in an ltaS mutant and is nearly absent in multiple mutants of ltaS and its homologs (10).…”

mentioning

confidence: 99%

Teichoic Acid Polymers Affect Expression and Localization of dl -Endopeptidase LytE Required for Lateral Cell Wall Hydrolysis in Bacillus subtilis

et al. 2016

Self Cite

View full text Add to dashboard Cite

In Bacillus subtilis, the DL-endopeptidase LytE is responsible for lateral peptidoglycan hydrolysis during cell elongation. We found that I -dependent transcription of lytE is considerably enhanced in a strain with a mutation in ltaS, which encodes a major lipoteichoic acid (LTA) synthase. Similar enhancements were observed in mutants that affect the glycolipid anchor and wall teichoic acid (WTA) synthetic pathways. Immunofluorescence microscopy revealed that the LytE foci were considerably increased in these mutants. The localization patterns of LytE on the sidewalls appeared to be helix-like in LTA-defective or WTAreduced cells and evenly distributed on WTA-depleted or -defective cell surfaces. These results strongly suggested that LTA and WTA affect both I -dependent expression and localization of LytE. Interestingly, increased LytE localization along the sidewall in the ltaS mutant largely occurred in an MreBH-independent manner. Moreover, we found that cell surface decorations with LTA and WTA are gradually reduced at increased culture temperatures and that LTA rather than WTA on the cell surface is reduced at high temperatures. In contrast, the amount of LytE on the cell surface gradually increased under heat stress conditions. Taken together, these results indicated that reductions in these anionic polymers at high temperatures might give rise to increases in SigI-dependent expression and cell surface localization of LytE at high temperatures. IMPORTANCEThe bacterial cell wall is required for maintaining cell shape and bearing environmental stresses. The Gram-positive cell wall consists of mesh-like peptidoglycan and covalently linked wall teichoic acid and lipoteichoic acid polymers. It is important to determine if these anionic polymers are required for proliferation and environmental adaptation. Here, we demonstrated that these polymers affect the expression and localization of a peptidoglycan hydrolase LytE required for lateral cell wall elongation. Moreover, we found that cell surface decorations with teichoic acid polymers are substantially decreased at high temperatures and that the peptidoglycan hydrolase is consequently increased. These findings suggest that teichoic acid polymers control lateral peptidoglycan hydrolysis by LytE, and bacteria drastically change their cell wall content to adapt to their environment.

show abstract

mentioning

confidence: 99%

Teichoic Acid Polymers Affect Expression and Localization of dl -Endopeptidase LytE Required for Lateral Cell Wall Hydrolysis in Bacillus subtilis

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…Naturally-occurring microbes can sorb a variety of PGMs, REEs and heavy metals, including Pt, Fe, Ni, Cu, Zn, Pb, Cu, Pd, Ag, Cd, Pt, Au, and Hg, with binding capacities typically on the order of 10 −5 to 10 −3 mol metal g −1 (dry wt) microbe (e.g., [44–46]). Thus, on a dry weight basis, the metal binding capacities of microbes compare favorably to the binding capacities of commercial ion exchangers.…”

Section: Microbe-metal Interactionsmentioning

confidence: 99%

“…Thus, on a dry weight basis, the metal binding capacities of microbes compare favorably to the binding capacities of commercial ion exchangers. Biosorption of metals to microbes can involve a variety of processes, including absorption, ion exchange, complexation, and precipitation [45,46]. These processes are critically regulated by the chemical groups displayed on the extracellular surfaces of microbial cells, such as carboxyl, phosphoryl, hydroxyl, carbonyl, and thiol moities.…”

Section: Microbe-metal Interactionsmentioning

confidence: 99%

Recovery of critical metals using biometallurgy

Zhuang

Fitts

Ajo‐Franklin

et al. 2015

Current Opinion in Biotechnology

173

102

View full text Add to dashboard Cite

The increased development of green low-carbon energy technologies that require platinum group metals (PGMs) and rare earth elements (REEs), together with the geopolitical challenges to sourcing these metals, has spawned major governmental and industrial efforts to rectify current supply insecurities. As a result of the increasing critical importance of PGMs and REEs, environmentally sustainable approaches to recover these metals from primary ores and secondary streams are needed. In this review, we define the sources and waste streams from which PGMs and REEs can potentially be sustainably recovered using microorganisms, and discuss the metal-microbe interactions most likely to form the basis of different environmentally-friendly recovery processes. Finally, we highlight the research needed to address challenges to applying the necessary microbiology for metal recovery given the physical and chemical complexities of specific streams.

show abstract

“…Naturally The metals biosorption to microbes can involve a variety of processes, including absorption, ion exchange, complexation, and precipitation [15,16]. These processes are determined by the chemical groups displayed on the extracellular surfaces of microbial cells, such as carboxyl, phosphoryl, hydroxyl and carbonyl.…”

Section: Why Bio-processes?mentioning

confidence: 99%

Considerations about recovery of critical metals using bio-metallurgy

Gherghe

2017

E3S Web Conf.

View full text Add to dashboard Cite

Abstract. The increased requirement of critical metals due to green technologies needs, together with the geopolitical environment to ensure these metals, has entailed decisive measures to avoid current supply insecurities in each country. These metals are essential to the products and services made and used daily, and contribute to sustaining and growing the economy. Thus, sustainable approaches from technological, environmental, economic and social point of view are needed to recover these metals from different resources. By using resources more efficiently, innovating in the concept of circular economy, it can be assure re-using, re-manufacturing or recycling of valuable materials. In this paper are presented some considerations related to using the waste dumps as potential resources to obtain critical metals by biometallurgical processes.

show abstract

Interactions of microorganisms with rare earth ions and their utilization for separation and environmental technology

Cited by 82 publications

References 54 publications

Teichoic Acid Polymers Affect Expression and Localization of dl -Endopeptidase LytE Required for Lateral Cell Wall Hydrolysis in Bacillus subtilis

Teichoic Acid Polymers Affect Expression and Localization of dl -Endopeptidase LytE Required for Lateral Cell Wall Hydrolysis in Bacillus subtilis

Recovery of critical metals using biometallurgy

Considerations about recovery of critical metals using bio-metallurgy

Contact Info

Product

Resources

About