Genetic and Physiological Adaptations of Marine Bacterium Pseudomonas stutzeri 273 to Mercury Stress

doi:10.3389/fmicb.2018.00682

IOCAS-IR > 实验海洋生物学重点实验室

	Genetic and Physiological Adaptations of Marine Bacterium Pseudomonas stutzeri 273 to Mercury Stress
	Zheng, Rikuan 1,2,3; Wu, Shimei 4; Ma, Ning 1,2,3; Sun, Chaomin 1,2
	2018-04-05
发表期刊	FRONTIERS IN MICROBIOLOGY
ISSN	1664-302X
卷号	9 页码:14
通讯作者	Sun, Chaomin(sunchaomin@qdio.ac.cn)
摘要	Mercury-mediated toxicity remains one of the greatest barriers against microbial survival, even though bacterial resistance to mercury compounds can occur. However, the genetic and physiological adaptations of bacteria to mercury stress still remains unclear. Here, we show that the marine bacterium Pseudomonas stutzeri 273 is resistant to 50 mu M Hg2+ and removes up to 94% Hg2+ from culture. Using gene homologous recombination and complementation, we show that genes encoding Hg2+-transport proteins MerT, MerP, the mercuric reductase MerA and the regulatory protein MerD are essential for bacterial mercuric resistance when challenged with Hg2+. Further, mercury stress inhibits flagellar development, motility, chemotaxis and biofilm formation of P. stutzeri 273, which are verified by transcriptomic and physiological analyses. Surprisingly, we discover that MerF, a previously reported Hg2+-transporter, determines flagellar development, motility and biofilm formation in P. stutzeri 273 by genetic and physiological analyses. Our results strongly indicate that MerF plays an integral role in P. stutzeri 273 to develop physiological responses to mercury stress. Notably, MerF homologs are also prevalent in different human pathogens. Using this unique target may provide novel strategies to control these pathogenic bacteria, given the role of MerF in flagella and biofilm formation. In summary, our data provide an original report on MerF in bacterial physiological development and suggest that the mer in marine bacteria has evolved through progressive, sequential recruitment of novel functions over time.
关键词	marine Pseudomonas stutzeri mercury stress motility flagella
DOI	10.3389/fmicb.2018.00682
收录类别	SCI
语种	英语
资助项目	Taishan Young Scholar Foundation of Shandong Province[tsqn20161051] ; Qingdao National Laboratory for Marine Science and Technology[2015ASTP] ; Natural Science Outstanding Youth Fund of Shandong Province[JQ201607] ; 100-Talent Project of the Chinese Academy of Sciences ; Taishan Young Scholar Foundation of Shandong Province[tsqn20161051] ; Qingdao National Laboratory for Marine Science and Technology[2015ASTP] ; Natural Science Outstanding Youth Fund of Shandong Province[JQ201607] ; 100-Talent Project of the Chinese Academy of Sciences
WOS研究方向	Microbiology
WOS类目	Microbiology
WOS记录号	WOS:000429289200001
出版者	FRONTIERS MEDIA SA
引用统计	被引频次：37[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/158442
专题	实验海洋生物学重点实验室
通讯作者	Sun, Chaomin
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Expt Marine Biol, Qingdao, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China 4.Qingdao Univ, Coll Life Sci, Qingdao, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Zheng, Rikuan,Wu, Shimei,Ma, Ning,et al. Genetic and Physiological Adaptations of Marine Bacterium Pseudomonas stutzeri 273 to Mercury Stress[J]. FRONTIERS IN MICROBIOLOGY,2018,9:14.
APA	Zheng, Rikuan,Wu, Shimei,Ma, Ning,&Sun, Chaomin.(2018).Genetic and Physiological Adaptations of Marine Bacterium Pseudomonas stutzeri 273 to Mercury Stress.FRONTIERS IN MICROBIOLOGY,9,14.
MLA	Zheng, Rikuan,et al."Genetic and Physiological Adaptations of Marine Bacterium Pseudomonas stutzeri 273 to Mercury Stress".FRONTIERS IN MICROBIOLOGY 9(2018):14.

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