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1529584 
Journal Article 
Magnetovibrio blakemorei, gen. nov. sp. nov., a new magnetotactic bacterium (Alphaproteobacteria: Rhodospirillaceae) isolated from a salt marsh 
Bazylinski, DA; Williams, TJ; Lefèvre, CT; Trubitsyn, D; Fang, J; Beveridge, TJ; Moskowitz, BM; Ward, B; Schübbe, S; Dubbels, BL; Simpson, B 
2013 
Yes 
International Journal of Systematic and Evolutionary Microbiology
ISSN: 1466-5026
EISSN: 1466-5034 
63 
Pt 5 
1824-1833 
English 
22984137 
WOS:000320741200040 
A magnetotactic bacterium, designated strain MV-1T, was isolated from sulfide-rich sediments in a salt marsh near Boston, Massachusetts. Cells of strain MV-1T are Gram-negative, and vibrioid to helicoid in morphology. Cells are motile by means of single polar flagellum. Cells appear to display a transitional state between axial and polar magnetotaxis: cells swim in both directions but generally have longer excursions in one direction than the other. Cells possess a single chain of magnetosomes containing truncated hexa-octahedral crystals of magnetite, positioned along the long axis of the cell. Strain MV-1T is a microaerophile that is also capable of anaerobic growth on some nitrogen oxides. Salinities greater than 10% of seawater are required for growth. Strain MV-1T exhibits chemolithoautotrophic growth on thiosulfate and sulfide with oxygen as the terminal electron acceptor (microaerobic growth), and on thiosulfate using nitrous oxide (N2O) as the terminal electron acceptor (anaerobic growth). Chemoorganoautotrophic and methylotrophic growth is supported by formate under microaerobic conditions. Autotrophic growth occurs via the Calvin-Benson-Bassham cycle. Chemoorganoheterotrophic growth is supported by various organic acids and amino acids, under microaerobic and anaerobic conditions. Optimal growth occurs at pH 7.0 and between 26-28°C. The genome of strain MV-1T consists of a single, circular chromosome about 3.7 Mb in size with a G + C content of 52.9-53.5 mol%. Phylogenetic analysis based on 16S rRNA gene sequences indicates that strain MV-1T belongs to the family Rhodospirillaceae within the Alphaproteobacteria, but is not closely related to members of the genus Magnetospirillum. The name Magnetovibrio blakemorei gen. nov., sp. nov. is proposed for strain MV-1T, which is designated as the type strain (= ATCC BAA-1436 T = DSM 18854T). 
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