Journal ArticleDOI
Growth in sulfidic mineral environments: metal resistance mechanisms in acidophilic micro-organisms
TLDR
This review summarizes the knowledge of acidophile metal resistance and presents preliminary in silico studies on a few known metal resistance systems in the sequenced acidophile genomes.Abstract:
Acidophilic micro-organisms inhabit some of the most metal-rich environments known, including both natural and man-made ecosystems, and as such are ideal model systems for study of microbial metal resistance. Although metal resistance systems have been studied in neutrophilic micro-organisms, it is only in recent years that attention has been placed on metal resistance in acidophiles. The five metal resistance mechanisms identified in neutrophiles are also present in acidophiles, in some cases utilizing homologous proteins, but in many cases the degree of resistance is greater in acidophiles. This review summarizes the knowledge of acidophile metal resistance and presents preliminary in silico studies on a few known metal resistance systems in the sequenced acidophile genomes.read more
Citations
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The bioleaching of sulphide minerals with emphasis on copper sulphides — A review
TL;DR: The main focus is on heap bioleaching of whole ores, and the development of models to describe heap and dump processes that can be applied in the design phase as well as to optimise metal extraction.
Journal ArticleDOI
Characteristics and adaptability of iron- and sulfur-oxidizing microorganisms used for the recovery of metals from minerals and their concentrates
TL;DR: The remarkable adaptability of these organisms is assisted by several of the processes being continuous-flow systems that enable the continual selection of microorganisms that are more efficient at mineral degradation.
Journal ArticleDOI
Microbial Extremophiles at the Limits of Life
TL;DR: In this review, the current status of studies in all fields of extremophiles are shown and the limits of life for different species of microbial extremophile species are summarized.
Journal ArticleDOI
Archaeal habitats — from the extreme to the ordinary
TL;DR: From the broad distribution, metabolic diversity, and sheer numbers of archaea in environments from the extreme to the ordinary, the roles that the Archaea play in the ecosystems have been grossly underestimated and are worthy of much greater scrutiny.
Journal ArticleDOI
The geomicrobiology of gold
TL;DR: Reductive precipitation of these complexes may improve survival rates of bacterial populations that are capable of detoxifying the immediate cell environment by detecting, excreting and reducing gold complexes, possibly using P-type ATPase efflux pumps as well as membrane vesicles.
References
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Journal ArticleDOI
Microbial heavy-metal resistance
TL;DR: This review describes the workings of known metal-resistance systems in microorganisms and the transport of the 17 most important (heavy metal) elements is compared.
Journal ArticleDOI
Microbial resistance to metals in the environment.
TL;DR: Six metal resistance mechanisms exist: exclusion by permeability barrier, intra- and extra-cellular sequestration, active transport efflux pumps, enzymatic detoxification, and reduction in the sensitivity of cellular targets to metal ions.
Journal ArticleDOI
Cloning the soil metagenome: a strategy for accessing the genetic and functional diversity of uncultured microorganisms.
Michelle R. Rondon,Paul R. August,Alan D. Bettermann,Sean F. Brady,Trudy H Grossman,Mark R. Liles,Kara A. Loiacono,Berkley A. Lynch,Ian A. MacNeil,Minor Charles A,Choi Lai Tiong,Michael Z. Gilman,Marcia S. Osburne,Jon Clardy,Jo Handelsman,Robert M. Goodman +15 more
TL;DR: Phylogenetic analysis of 16S rRNA gene sequences recovered from one of the libraries indicates that the BAC libraries contain DNA from a wide diversity of microbial phyla, including sequences from diverse taxa such as the low-G+C, gram-positive Acidobacterium,Cytophagales, and Proteobacteria.
Journal ArticleDOI
Negative pH, efflorescent mineralogy, and consequences for environmental restoration at the Iron Mountain Superfund site, California.
Nordstrom Dk,Charles N. Alpers +1 more
TL;DR: Geochemical calculations show that, under a mine-plugging remediation scenario, the resultant 600,000-m3 mine pool would have a pH of 1 or less and contain several grams of dissolved metals per liter, much like the current portal effluent water.
Journal ArticleDOI
The genome sequence of the thermoacidophilic scavenger Thermoplasma acidophilum
Andreas Ruepp,Werner Graml,Martha-Leticia Santos-Martinez,Kristin K. Koretke,Craig Volker,H. Werner Mewes,Dmitrij Frishman,Susanne Stocker,Andrei N. Lupas,Wolfgang Baumeister +9 more
TL;DR: The interest in protein folding and degradation led us to seek a more complete representation of the proteins involved in these pathways by determining the genome sequence of the organism, and here the 1,564,905-base-pair genome is sequenced in just 7,855 sequencing reactions by using a new strategy.