Ecology, Diversity, and Evolution of Magnetotactic Bacteria
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TLDR
The purpose of this review is focused on the diversity and the ecology of the MTB and also the evolution and transfer of the molecular determinants involved in magnetosome formation.Abstract:
SUMMARY Magnetotactic bacteria (MTB) are widespread, motile, diverse prokaryotes that biomineralize a unique organelle called the magnetosome. Magnetosomes consist of a nano-sized crystal of a magnetic iron mineral that is enveloped by a lipid bilayer membrane. In cells of almost all MTB, magnetosomes are organized as a well-ordered chain. The magnetosome chain causes the cell to behave like a motile, miniature compass needle where the cell aligns and swims parallel to magnetic field lines. MTB are found in almost all types of aquatic environments, where they can account for an important part of the bacterial biomass. The genes responsible for magnetosome biomineralization are organized as clusters in the genomes of MTB, in some as a magnetosome genomic island. The functions of a number of magnetosome genes and their associated proteins in magnetosome synthesis and construction of the magnetosome chain have now been elucidated. The origin of magnetotaxis appears to be monophyletic; that is, it developed in a common ancestor to all MTB, although horizontal gene transfer of magnetosome genes also appears to play a role in their distribution. The purpose of this review, based on recent progress in this field, is focused on the diversity and the ecology of the MTB and also the evolution and transfer of the molecular determinants involved in magnetosome formation.read more
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Distribution and diversity of magnetotactic bacteria in sediments of the Yellow Sea continental shelf
TL;DR: In this paper, the authors investigated the diversity and spatial distribution of magnetotactic bacteria (MTB) on the continent shelf of the Yellow Sea and found that diverse MTB are widely distributed in the seafloor sediment of theYellow Sea, with Nitrospirae likely being the dominating group, and that the abundance of MTB were influenced by sediment grain size.
Journal ArticleDOI
North-Seeking Magnetotactic Gammaproteobacteria in the Southern Hemisphere.
Pedro Leão,Lia C. R. S. Teixeira,Jefferson Cypriano,Marcos Farina,Fernanda Abreu,Dennis A. Bazylinski,Ulysses Lins +6 more
TL;DR: A population of an uncultured, monotrichously flagellated, and vibrioid MTB collected from a brackish lagoon in Brazil in the Southern Hemisphere that consistently exhibits north-seeking polarity is reported, supporting the idea that magnetotaxis is more complex than previously thought.
Journal ArticleDOI
Culture‐independent characterization of a novel magnetotactic member affiliated to the Beta class of the Proteobacteria phylum from an acidic lagoon
Fernanda Abreu,Pedro Leão,Gabriele Vargas,Jefferson Cypriano,Viviane Figueiredo,Alex Enrich-Prast,Alex Enrich-Prast,Dennis A. Bazylinski,Ulysses Lins +8 more
TL;DR: This is the first report of an MTB phylogenetically affiliated with Betaproteobacteria class from an acidic freshwater lagoon in Brazil and some of the retrieved gene sequences belonged to the genus Herbaspirillum within the BetAProteob bacteria class of the Proteobacteria phylum.
Posted ContentDOI
Rice paddy Nitrospirae encode and express genes related to sulfate respiration: proposal of the new genus Candidatus Sulfobium
Sarah Zecchin,Ralf C. Mueller,Jana Seifert,Ulrich Stingl,Karthik Anantharaman,Martin van Bergen,Lucia Cavalca,Michael Pester +7 more
TL;DR: The genome of Nitrospirae bacterium Nbg-4 was assembled from replicated metagenomes of rice paddy soil that was used to grow rice plants in the presence and absence of gypsum and showed the full pathway of dissimilatory sulfate reduction and showed expression thereof in gypsu-amended anoxic bulk soil as revealed by parallel metaproteomics.
Journal ArticleDOI
Diverse Intracellular Inclusion Types Within Magnetotactic Bacteria: Implications for Biogeochemical Cycling in Aquatic Environments
Jinhua Li,Peiyu Liu,Alima Tamaxia,Heng Zhang,Yan Liu,Jian Wang,Nicolas Menguy,Xiang Zhao,Andrew P. Roberts,Yongxin Pan +9 more
TL;DR: A conceptual model is proposed in which MTB drive biogeochemical elemental cycling within aquatic OATZ environments and contribute to the distribution and burial of biominerals in sediments.
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