Adsorption of rare earth ions onto the cell walls of wild-type and lipoteichoic acid-defective strains of Bacillus subtilis

Moriwaki, Hiroshi; Koide, Remi; Yoshikawa, Ritsuko; Warabino, Yuya; Yamamoto, Hiroki

doi:10.1007/s00253-012-4200-3

Cited by 63 publications

(49 citation statements)

References 26 publications

(15 reference statements)

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“…The ∆LTA powder readily coagulated and sedimented in the presence of REEs. On the other hand, such coagulation and sedimentation did not occur with the WT powder and rare earth ion aqueous solution under the same conditions (Moriwaki et al 2012). The length of time required for the filtration of the test solution (20 mL) by using 5A filtration paper were 105 and 43 s for the WT powder and ∆LTA powder, respectively.…”

Section: Discussionmentioning

confidence: 90%

“…2b). In order to evaluate the distribution of lipoteichoic acid relative to the REE adsorption of B. subtilis cell wall, the REE adsorption of the freeze-dried cell powder of a wild type (WT powder) and lipoteichoic acid-defective strainLTA powder) were compared (Moriwaki et al 2012). It was found that the percentage removal of La, Eu, and Tm ions by using WT powder from water was greater than that by LTA powder (Fig.3).…”

Section: Selective Accumulation Of Rres Using Microorganismsmentioning

confidence: 99%

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

Moriwaki

Yamamoto

2012

Appl Microbiol Biotechnol

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In recent years, rare earth elements (REEs) have been widely used in various modern technological devices, and the global demand for REE has been increasing. The increased demand for REEs has led to environmental exposure or water pollution from rare earth metal mines and various commercial products. Therefore, the development of a safe technology for the separation and adsorption of REEs is very important from the perspective of green chemistry and environmental pollution. In this review, the application and mechanisms of microorganisms for the removal and extraction of REEs from aqueous solutions are described.In addition, the advantages in using microorganisms for REE adsorption and future studies on this topic are discussed.

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Section: Discussionmentioning

confidence: 90%

Section: Selective Accumulation Of Rres Using Microorganismsmentioning

confidence: 99%

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

Moriwaki

Yamamoto

2012

Appl Microbiol Biotechnol

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“…This largely indicated that many MDHs are lanthanide dependent. It was assumed that by modifying the structure of protein, the specificity and binding efficiency of protein towards the substrate could be improved [40,41]. Henceforth, a REE-specific transporter to only recognize one particular REE could artificially evolve to concentrate REE in its cell.…”

Section: Bio-reclamation Of Rare Earth Elementsmentioning

confidence: 99%

Bio-Reclamation of Strategic and Energy Critical Metals from Secondary Resources

Ilyas

Kim

Lee

et al. 2017

Metals

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Abstract:Metals with an average crustal abundance of <0.01 ppm, which are high in supply shortage due to soaring demand, can, under the excessive environmental risk and <1% recycling rate of their production, be termed as 'critical' in a limited geo-boundary. A global trend to the green energy and low carbon technologies with geopolitical scenario is challenging for the sustainable reclamation of these metals from secondary resources. Among the available processes, bio-reclamation can be a sustainable technique for extracting and concentrating these metals. Therefore, in the present paper, the potential reclamation of critical metals (including rare earth elements, precious metals, and a common nuclear fuel element, uranium) via their interaction with microbe/s has been reviewed.

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“…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).…”

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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

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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.

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Adsorption of rare earth ions onto the cell walls of wild-type and lipoteichoic acid-defective strains of Bacillus subtilis

Cited by 63 publications

References 26 publications

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

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

Bio-Reclamation of Strategic and Energy Critical Metals from Secondary Resources

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

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