Ecology, Diversity, and Evolution of Magnetotactic Bacteria
Reads0
Chats0
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
Citations
More filters
Journal ArticleDOI
Antibiotics affect migratory restlessness orientation
TL;DR: In this paper , the authors examined the effect of a widely used antibiotic substance on migratory restlessness orientation and on magnetotactic bacteria using migrating Eurasian reed warblers and found that antibiotic treatment caused a lack of clear directionality in an Emlen funnel experiment.
Posted ContentDOI
Magnetic quantification of Fe and S bound as magnetosomal greigite in laminated sapropels in deeper basins of the Baltic Sea
TL;DR: In this article, the authors quantified the abundance of Fe and S bound as greigite magnetofossils in laminated Baltic Sea sapropels, which were formed during periods of hypoxia and anoxia, using mineral magnetic measurements.
Journal ArticleDOI
Key gene networks that control magnetosome biomineralization in magnetotactic bacteria
Peiyu Liu,Yue Zheng,Rongrong Zhang,Jinling Bai,Kelei Zhu,Karim Benzerara,Nicolas Menguy,Xiang-Dong Zhao,Andrew W. Roberts,Yongxin Pan,Jinhua Li +10 more
TL;DR: In this article , the authors present an integrative genomic and phenomic analysis to investigate the genetic basis of magnetosome biomineralization in both cultured and uncultured strains from phylogenetically diverse MTB groups.
Journal ArticleDOI
Atomic Details of Biomineralization Proteins Inspiring Protein Design and Reengineering for Functional Biominerals
TL;DR: The progression of this review from classical template proteins to silica polymerization seeks to benefit researchers involved in various interdisciplinary aspects of a biomineralization project, who need background information and a quick update on advances in the field.
References
More filters
Journal ArticleDOI
Oxidative mechanisms in the toxicity of metal ions
Sidney J. Stohs,Debasis Bagchi +1 more
TL;DR: Some mechanisms associated with the toxicities of metal ions are very similar to the effects produced by many organic xenobiotics, related to differences in solubilities, absorbability, transport, chemical reactions, and the complexes that are formed within the body.
Journal ArticleDOI
A marine microbial consortium apparently mediating anaerobic oxidation of methane
Antje Boetius,Katrin Ravenschlag,Carsten J. Schubert,Dirk Rickert,Friedrich Widdel,Armin Gieseke,Rudolf Amann,Bo Barker Jørgensen,Ursula Witte,Olaf Pfannkuche +9 more
TL;DR: In this article, the authors provide microscopic evidence for a structured consortium of archaea and sulphate-reducing bacteria, which are identified by fluorescence in situ hybridization using specific 16S rRNA-targeted oligonucleotide probes.
Journal ArticleDOI
Siderophores: Structure and Function of Microbial Iron Transport Compounds
TL;DR: Overproduction of the siderophore and its transport system at low iron is in this species well established to be the result of negative transcriptional repression, but the detailed mechanism may be positive in other organisms.
Journal ArticleDOI
Electronic Conduction of Magnetite (Fe 3 O 4 ) and its Transition Point at Low Temperatures
TL;DR: In this paper, the authors measured the electronic conductivity of a number of iron oxides of the homogeneous "Fe3O4" phase, especially as a function of the exact stoichiometrie composition of the material.
Journal ArticleDOI
Magnetosome formation in prokaryotes
TL;DR: Progress has been made in elucidating the molecular, biochemical, chemical and genetic bases of magnetosome formation and understanding how these unique intracellular organelles function.