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Encapsulins from Ca. Brocadia fulgida: An effective tool to enhance the tolerance of engineered bacteria (pET-28a-cEnc) to Zn2+

Wang, Que1; Zhou, Yue-Ming2; Xing, Chong-Yang3,4; Li, Wen-Chao1; Shen, Yu2; Yan, Peng1; Guo, Jin -Song1; Fang, Fang1; Chen, You -Peng1
2022-08-05
摘要Zn2+ is largely discharged from many industries and poses a severe threat to the environment, making its remediation crucial. Encapsulins, proteinaceous nano-compartments, may protect cells against environmental stresses by sequestering toxic substances. To determine whether hemerythrin-containing encapsulins (cEnc) from anammox bacteria Ca. Brocadia fulgida can help cells deal with toxic substances such as Zn2+, we transferred cEnc into E.coli by molecular biology technologies for massive expression and then cultured them in media with increasing Zn2+ levels. The engineered bacteria (with cEnc) grew better and entered the apoptosis phase later, while wild bacteria showed poor survival. Furthermore, tandem mass tag-based quantitative proteomic analysis was used to reveal the underlying regulatory mechanism by which the genetically-engineered bacteria (with cEnc) adapted to Zn2+ stress. When Zn2+ was sequestered in cEnc as a transition, the engineered bacteria pre-sented a complex network of regulatory systems against Zn2+-induced cytotoxicity, including functions related to ribosomes, sulfur metabolism, flagellar assembly, DNA repair, protein synthesis, and Zn2+ efflux. Our findings offer an effective and promising stress control strategy to enhance the Zn2+ tolerance of bacteria for Zn2+ remediation and provide a new application for encapsulins.
关键词Encapsulins Zn2+ Overexpression Escherichia coli Proteomics
DOI10.1016/j.jhazmat.2022.128954
发表期刊JOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
卷号435页码:11
通讯作者Chen, You -Peng(ypchen@cqu.edu.cn)
收录类别SCI
WOS记录号WOS:000798745400005
语种英语