Complete Genome Sequence of Magnetospirillum gryphiswaldense MSR-1

Xu, Wei; Wang, Qing; Zhang, Weijia; Wang, Yinjia; Li, Li; Wen, Tong; Zhang, Tongwei; Yang, Zujun; Xu, Jun; Hu, Junying; Li, Shuqi; Liu, Lingzi; Liu, Jinxin; Jiang, Wei; Tian, Jie; Li, Ying; Schüler, Dirk; Wang, Lei; Li, Jilun

doi:10.1128/genomea.00171-14

Cited by 23 publications

(24 citation statements)

References 8 publications

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“…magneticum' AMB-1 (Matsunaga et al, 2005;Grouzdev et al, 2014;Wang et al, 2014;Smalley et al, 2015) as described by Konstantinidis et al (2006). The analysis showed ANI of j87.5 %, confirming that strain SO-1 T and the previously described type strains M. magnetotacticum MS-1 T and M. gryphiswaldense MSR-1 T as well as 'M.…”

supporting

confidence: 70%

Magnetospirillum caucaseum sp. nov., Magnetospirillum marisnigri sp. nov. and Magnetospirillum moscoviense sp. nov., freshwater magnetotactic bacteria isolated from three distinct geographical locations in European Russia

Dziuba

Koziaeva

Grouzdev

et al. 2016

International Journal of Systematic and Evolutionary Microbiology

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supporting

confidence: 70%

Magnetospirillum caucaseum sp. nov., Magnetospirillum marisnigri sp. nov. and Magnetospirillum moscoviense sp. nov., freshwater magnetotactic bacteria isolated from three distinct geographical locations in European Russia

Dziuba

Koziaeva

Grouzdev

et al. 2016

International Journal of Systematic and Evolutionary Microbiology

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“…strain MS-1, Magnetococcus marinus strain MC-1 and Magnetospira sp. strain QH-2 [6–11]. For the Deltaproteobacteria , complete genome sequences are available for Desulfovibrio magneticus strain RS-1 [12].…”

Section: Introductionmentioning

confidence: 99%

Combined genomic and structural analyses of a cultured magnetotactic bacterium reveals its niche adaptation to a dynamic environment

et al. 2016

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BackgroundMagnetotactic bacteria (MTB) are a unique group of prokaryotes that have a potentially high impact on global geochemical cycling of significant primary elements because of their metabolic plasticity and the ability to biomineralize iron-rich magnetic particles called magnetosomes. Understanding the genetic composition of the few cultivated MTB along with the unique morphological features of this group of bacteria may provide an important framework for discerning their potential biogeochemical roles in natural environments.ResultsGenomic and ultrastructural analyses were combined to characterize the cultivated magnetotactic coccus Magnetofaba australis strain IT-1. Cells of this species synthesize a single chain of elongated, cuboctahedral magnetite (Fe3O4) magnetosomes that cause them to align along magnetic field lines while they swim being propelled by two bundles of flagella at velocities up to 300 μm s−1. High-speed microscopy imaging showed the cells move in a straight line rather than in the helical trajectory described for other magnetotactic cocci. Specific genes within the genome of Mf. australis strain IT-1 suggest the strain is capable of nitrogen fixation, sulfur reduction and oxidation, synthesis of intracellular polyphosphate granules and transporting iron with low and high affinity. Mf. australis strain IT-1 and Magnetococcus marinus strain MC-1 are closely related phylogenetically although similarity values between their homologous proteins are not very high.Conclusion Mf. australis strain IT-1 inhabits a constantly changing environment and its complete genome sequence reveals a great metabolic plasticity to deal with these changes. Aside from its chemoautotrophic and chemoheterotrophic metabolism, genomic data indicate the cells are capable of nitrogen fixation, possess high and low affinity iron transporters, and might be capable of reducing and oxidizing a number of sulfur compounds. The relatively large number of genes encoding transporters as well as chemotaxis receptors in the genome of Mf. australis strain IT-1 combined with its rapid swimming velocities, indicate that cells respond rapidly to environmental changes.Electronic supplementary materialThe online version of this article (doi:10.1186/s12864-016-3064-9) contains supplementary material, which is available to authorized users.

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“…In addition to the magnetosome genes, we have compared the draft genome of Mcas with four complete genomes of Proteobacteria MTB strains, including M. magneticum AMB-1 (Matsunaga et al, 2005), M. gryphiswaldense MSR-1 (Wang et al, 2014) and M. marinus MC-1 (Schü bbe et al, 2009) belonging to the Alphaproteobacteria and D. magneticus RS-1 (Nakazawa et al, 2009) Table S3). Although this is a conservative estimate because the genome of Mcas is not complete, the products of these orthologous genes seem to be common in Nitrospirae and Proteobacteria MTB, and hence some of them may have roles in magnetotaxis or magnetosome formation.…”

Section: Genomic Comparison With Proteobacteria Mtbmentioning

confidence: 99%

Genomic insights into the uncultured genus ‘Candidatus Magnetobacterium’ in the phylum Nitrospirae

et al. 2014

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Magnetotactic bacteria (MTB) of the genus 'Candidatus Magnetobacterium' in phylum Nitrospirae are of great interest because of the formation of hundreds of bullet-shaped magnetite magnetosomes in multiple bundles of chains per cell. These bacteria are worldwide distributed in aquatic environments and have important roles in the biogeochemical cycles of iron and sulfur. However, except for a few short genomic fragments, no genome data are available for this ecologically important genus, and little is known about their metabolic capacity owing to the lack of pure cultures. Here we report the first draft genome sequence of 3.42 Mb from an uncultivated strain tentatively named 'Ca. Magnetobacterium casensis' isolated from Lake Miyun, China. The genome sequence indicates an autotrophic lifestyle using the Wood-Ljungdahl pathway for CO 2 fixation, which has not been described in any previously known MTB or Nitrospirae organisms. Pathways involved in the denitrification, sulfur oxidation and sulfate reduction have been predicted, indicating its considerable capacity for adaptation to variable geochemical conditions and roles in local biogeochemical cycles. Moreover, we have identified a complete magnetosome gene island containing mam, mad and a set of novel genes (named as man genes) putatively responsible for the formation of bullet-shaped magnetite magnetosomes and the arrangement of multiple magnetosome chains. This first comprehensive genomic analysis sheds light on the physiology, ecology and biomineralization of the poorly understood 'Ca. Magnetobacterium' genus.

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Complete Genome Sequence of Magnetospirillum gryphiswaldense MSR-1

Cited by 23 publications

References 8 publications

Magnetospirillum caucaseum sp. nov., Magnetospirillum marisnigri sp. nov. and Magnetospirillum moscoviense sp. nov., freshwater magnetotactic bacteria isolated from three distinct geographical locations in European Russia

Magnetospirillum caucaseum sp. nov., Magnetospirillum marisnigri sp. nov. and Magnetospirillum moscoviense sp. nov., freshwater magnetotactic bacteria isolated from three distinct geographical locations in European Russia

Combined genomic and structural analyses of a cultured magnetotactic bacterium reveals its niche adaptation to a dynamic environment

Genomic insights into the uncultured genus ‘Candidatus Magnetobacterium’ in the phylum Nitrospirae

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