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Updated: Jun 25, 2025

Studying Copper Nanoparticle-Induced Programmed Cell Death in Bacteria
Published on: May 16, 2025
Copper Resistance Mechanism and Copper Response Genes in Corynebacterium crenatum
Mingzhu Huang1,2, Wenxin Liu1,2, Chunyan Qin2
1National R&D Center of Freshwater Fish Processing, Jiangxi Normal University, Nanchang 330022, China.
Abstract:
Heavy metal resistance mechanisms and heavy metal response genes are crucial for microbial utilization in heavy metal remediation. Here, Corynebacterium crenatum was proven to possess good tolerance in resistance to copper. Then, the transcriptomic responses to copper stress were investigated, and the vital pathways and genes involved in copper resistance of C. crenatum were determined. Based on transcriptome analysis results, a total of nine significantly upregulated DEGs related to metal ion transport were selected for further study. Among them, GY20_RS0100790 and GY20_RS0110535 belong to transcription factors, and GY20_RS0110270, GY20_RS0100790, and GY20_RS0110545 belong to copper-binding peptides. The two transcription factors were studied for the function of regulatory gene expression. The three copper-binding peptides were displayed on the C. crenatum surface for a copper adsorption test. Furthermore, the nine related metal ion transport genes were deleted to investigate the effect on growth in copper stress. This investigation provided the basis for utilizing C. crenatum in copper bioremediation.
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