AI Article Synopsis

  • Neodymium (Nd) is increasingly recognized as an environmental pollutant with potential risks to ecosystems and health, prompting a need for research on its toxicity and detoxification mechanisms in microorganisms.
  • Through genome-wide screening, researchers identified 70 yeast mutants sensitive to Nd, which are linked to vital cellular processes like metabolism, transcription, and protein synthesis.
  • The study also revealed regulatory networks related to Nd toxicity, involving signal pathways such as calcium transport and autophagy, and found that many mutant strains accumulated higher levels of Nd ions, laying the groundwork for further exploration of Nd detoxification in yeast.

Article Abstract

The wide usage of neodymium (Nd) in industry, agriculture, and medicine has made it become an emerging pollutant in the environment. Increasing Nd pollution has potential hazards to plants, animals, and microorganisms. Thus, it is necessary to study the toxicity of Nd and the mechanism of Nd transportation and detoxification in microorganisms. Through genome-scale screening, we identified 70 yeast monogene deletion mutations sensitive to Nd ions. These genes are mainly involved in metabolism, transcription, protein synthesis, cell cycle, DNA processing, protein folding, modification, and cell transport processes. Furthermore, the regulatory networks of Nd toxicity were identified by using the protein interaction group analysis. These networks are associated with various signal pathways, including calcium ion transport, phosphate pathways, vesicular transport, and cell autophagy. In addition, the content of Nd ions in yeast was detected by an inductively coupled plasma mass spectrometry, and most of these Nd-sensitive mutants showed an increased intracellular Nd content. In all, our results provide the basis for understanding the molecular mechanisms of detoxifying Nd ions in yeast cells, which will be useful for future studies on Nd-related issues in the environment, agriculture, and human health.

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http://dx.doi.org/10.1007/s11356-021-18100-2DOI Listing

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