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Identification and Genomic Characterization of Two Previously Unknown Magnetotactic Nitrospirae

文献类型：期刊论文

作者Zhang, Wensi1,3,4; Wang, Yinzhao2; Liu, Li1,3,4; Pan, Yongxin1,3,4; Lin, Wei1,4
刊名FRONTIERS IN MICROBIOLOGY
出版日期2021-07-27
卷号12页码:11
关键词magnetotactic bacteria Nitrospirae metagenomics magnetotaxis magnetosome gene cluster
DOI10.3389/fmicb.2021.690052
英文摘要Magnetotactic bacteria (MTB) are a group of microbes that biomineralize membrane-bound, nanosized magnetite (Fe3O4), and/or greigite (Fe3S4) crystals in intracellular magnetic organelle magnetosomes. MTB belonging to the Nitrospirae phylum can form up to several hundreds of Fe3O4 magnetosome crystals and dozens of sulfur globules in a single cell. These MTB are widespread in aquatic environments and sometimes account for a significant proportion of microbial biomass near the oxycline, linking these lineages to the key steps of global iron and sulfur cycling. Despite their ecological and biogeochemical importance, our understanding of the diversity and ecophysiology of magnetotactic Nitrospirae is still very limited because this group of MTB remains unculturable. Here, we identify and characterize two previously unknown MTB populations within the Nitrospirae phylum through a combination of 16S rRNA gene-based and genome-resolved metagenomic analyses. These two MTB populations represent distinct morphotypes (rod-shaped and coccoid, designated as XYR, and XYC, respectively), and both form more than 100 bullet-shaped magnetosomal crystals per cell. High-quality draft genomes of XYR and XYC have been reconstructed, and they represent a novel species and a novel genus, respectively, according to their average amino-acid identity values with respect to available genomes. Accordingly, the names Candidatus Magnetobacterium cryptolimnobacter and Candidatus Magnetomicrobium cryptolimnococcus for XYR and XYC, respectively, were proposed. Further comparative genomic analyses of XYR, XYC, and previously reported magnetotactic Nitrospirae reveal the general metabolic potential of this MTB group in distinct microenvironments, including CO2 fixation, dissimilatory sulfate reduction, sulfide oxidation, nitrogen fixation, or denitrification processes. A remarkably conserved magnetosome gene cluster has been identified across Nitrospirae MTB genomes, indicating its putative important adaptive roles in these bacteria. Taken together, the present study provides novel insights into the phylogenomic diversity and ecophysiology of this intriguing, yet poorly understood MTB group.
WOS关键词INDEPENDENT CHARACTERIZATION ; CANDIDATUS MAGNETOBACTERIUM ; MAGNETOSOME BIOGENESIS ; GENETIC DISSECTION ; BACTERIA REVEALS ; DIVERSITY ; TOOL ; BIOMINERALIZATION ; ALGORITHM ; EVOLUTION
资助项目National Natural Science Foundation of China (NSFC)[41822704] ; National Natural Science Foundation of China (NSFC)[41621004] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
WOS研究方向Microbiology
语种英语
WOS记录号WOS:000683306300001
出版者FRONTIERS MEDIA SA
资助机构National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/101914]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Lin, Wei
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
2.Shanghai Jiao Tong Univ, Sch Life Sci & Biotechnol, State Key Lab Microbial Metab, Shanghai, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
4.Chinese Acad Sci, France China Joint Lab Evolut & Dev Magnetotact M, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Wensi,Wang, Yinzhao,Liu, Li,et al. Identification and Genomic Characterization of Two Previously Unknown Magnetotactic Nitrospirae[J]. FRONTIERS IN MICROBIOLOGY,2021,12:11.
APA Zhang, Wensi,Wang, Yinzhao,Liu, Li,Pan, Yongxin,&Lin, Wei.(2021).Identification and Genomic Characterization of Two Previously Unknown Magnetotactic Nitrospirae.FRONTIERS IN MICROBIOLOGY,12,11.
MLA Zhang, Wensi,et al."Identification and Genomic Characterization of Two Previously Unknown Magnetotactic Nitrospirae".FRONTIERS IN MICROBIOLOGY 12(2021):11.

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来源：地质与地球物理研究所

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