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Sulfur metabolism by marine heterotrophic bacteria involved in sulfur cycling in the ocean

Science China Earth Sciences 2018年第10期61卷 1369-1378页

作者： Xin HU Jihua LIU Huaiwei LIU Guangchao ZHUANG luying xun Institute of Marine Science and Technology Shandong University State Key Laboratory of Microbial Technology Shandong University Department of Marine Sciences University of Georgia

Sulfur cycling in the biosphere is tightly interwoven with the cycling of carbon and nitrogen,through various biological and geochemical *** microorganisms,due to their high abundance,diverse metabolic activities,and tremendous adaptation potential,play an essential role in the functioning of global biogeochemical cycles and linking sulfur transformation to the cycling of carbon and *** many coastal regions are severely stressed by hypoxic or anoxic conditions,leading to the accumulation of toxic sulfide.A number of recent studies have demonstrated that dissimilatory sulfur oxidation by heterotrophic bacteria can protect marine ecosystems from sulfide ***-oxidizing bacteria have evolved diverse phylogenetic and metabolic characteristics to fill an array of ecological niches in various marine ***,we review the recent findings on the microbial communities that are involved in the oxidation of inorganic sulfur compounds and address how the two elements of sulfur and carbon are interlinked and influence the ecology and biogeochemistry in the *** the metabolic enzymes and pathways of sulfur-oxidizing bacteria not only provides an insight into the microbial sulfur metabolism,but also helps us understand the effects of changing environmental conditions on marine sulfur cycling and reinforces the close connection between sulfur and carbon cycling in the ocean.

关键词： Sulfur cycling Sulfur oxidation Heterotrophic bacteria Metabolic pathway

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MarR family proteins sense sulfane sulfur in bacteria

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mLife 2024年第2期3卷 231-239页

作者： Guanhua Xuan luying xun Yongzhen Xia State Key Laboratory of Microbial Technology Shandong UniversityQingdaoChina State Key Laboratory of Marine Food Processing&Safety Control Ocean University of ChinaQingdaoChina School of Molecular Biosciences Washington State UniversityPullmanWashingtonUSA

Members of the multiple antibiotic resistance regulator(MarR)protein family are ubiquitous in bacteria and play critical roles in regulating cellular metabolism and antibiotic *** family proteins function as repressors,and their interactions with modulators induce the expression of controlled *** previously characterized modulators are insufficient to explain the activities of certain MarR family ***,recently,several MarR family proteins have been reported to sense sulfane sulfur,including zero-valent sulfur,persulfide(R-SSH),and polysulfide(R-SnH,n≥2).Sulfane sulfur is a common cellular component in bacteria whose levels vary during bacterial *** changing levels of sulfane sulfur affect the expression of many MarR-controlled *** sulfur reacts with the cysteine thiols of MarR family proteins,causing the formation of protein thiol persulfide,disulfide bonds,and other *** MarR family proteins that respond to reactive oxygen species(ROS)also sense sulfane sulfur,as both sulfane sulfur and ROS induce the formation of disulfide *** review focused on MarR family proteins that sense sulfane ***,the sensing mechanisms reviewed here may also apply to other proteins that detect sulfane sulfur,which is emerging as a modulator of gene regulation.

关键词： cysteine thiols disulfide bond MarR protein family ROS sulfane sulfur

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Mechanisms of carbon storage and the coupled carbon, nitrogen and sulfur cycles in regional seas in response to global change

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Science China Earth Sciences 2017年第5期60卷 1010-1014页

作者： XIE ShuCheng CHEN JianFang WANG FengPing xun luying TANG Kai ZHAI WeiDong LIU JiHua MA WenTao State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences The Second Institute of Oceanography State Marine Administration of China Faculty of Life Science and Technology Shanghai Jiaotong University Institute of Oceanography Shangdong University College of Ocean and Earth Sciences Xiamen University School of Ocean and Earth Science Tongji University

*** challenges in scientific frontiers of marine carbon storage in the scenario of global change The marine carbon cycle is influenced by anthropogenic activities,affecting global climate change and casting a significant impact on ***,the complex spatiotemporal process of the marine carbon cycle results in the uncertainty in the estimation of marine carbon budget。

关键词： sulfur anthropogenic cycle scenario affecting microbial warming nutrients anaerobic Bohai

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