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Evolutionary advantages of polyploidy in halophilic archaea
Biochemical Society Transactions, 2013Several species of haloarchaea have been shown to be polyploid and thus this trait might be typical for and widespread in haloarchaea. In the present paper, nine different possible evolutionary advantages of polyploidy for haloarchaea are discussed, including low mutation rate, radiation/desiccation resistance, gene redundancy and survival over ...
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HF1 and HF2: Novel Bacteriophages of Halophilic Archaea
Virology, 1993Two novel halophilic archaebacterial bacteriophages, HF1 and HF2, were isolated from an Australian solar saltern. They were morphologically identical with icosahedral-shaped heads (diameter 58 nm) and contractile tails (length 94 nm). Other similarities included sensitivity to reduced ionic conditions, similar protein profiles by SDS-PAGE, and dsDNA ...
S D, Nuttall, M L, Dyall-Smith
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Enzymes from Halophilic Archaea: Open Questions
2011During the past few decades, the microbial communities inhabiting extreme environments have become a focus on scientific interest owing to the unique properties of the biocatalysts they produce (extremozymes). These extremozymes can cope with industrial process conditions (high temperatures, high salt concentrations, low water availability, etc.) due ...
María José Bonete +1 more
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27 Genetic Systems for Halophilic Archaea
2006Publisher Summary Genome sequences are available for several common laboratory strains of haloarchaea. The genomes of these haloarchaea are relatively GC-rich (58–68%) and contain large and small extra chromosomal elements. Haloarchaea represent excellent experimental models for the studies of archaeal, extremophilic, and aspects of eukaryotic ...
Brian R Berquist +2 more
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Halophilic Archaea determined from geothermal steam vent aerosols
Environmental Microbiology, 2008Summary Hydrothermal vents, known as ‘fumaroles’, are ubiquitous features of geothermal areas. Although their geology has been extensively characterized, little is known about the subsurface microbial ecology of fumaroles largely because of the difficulty in collecting sufficient numbers of cells from boiling ...
Dean G, Ellis +2 more
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Evolutionary divergence and salinity-mediated selection in halophilic archaea
Microbiology and Molecular Biology Reviews, 1997Halophilic (literally salt-loving) archaea are a highly evolved group of organisms that are uniquely able to survive in and exploit hypersaline environments. In this review, we examine the potential interplay between fluctuations in environmental salinity and the primary sequence and tertiary structure of halophilic proteins. The proteins of halophilic
P P, Dennis, L C, Shimmin
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Enzyme diversity in halophilic archaea.
Microbiologia (Madrid, Spain), 1995The halophilic archaea display a considerable extent of enzyme diversity. The presence or absence of certain enzymatic activities is closely linked with the taxonomic status of the strains investigated. Thus, Halobacterium species such as Hb. salinarium, Hb. halobium, and Hb.
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25 Characterization of Lipids of Halophilic Archaea
2006Publisher Summary One- or two-dimensional thin-layer chromatography (TLC) is a useful technique for the rapid characterization of the lipids present in halophilic archaeal isolates. Mass spectrometry and nuclear magnetic resonance (NMR) spectroscopic techniques are powerful analytical methods in studies of structural characterization of lipid ...
Angela Corcelli, Simona Lobasso
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Proteases Produced by Halophilic Bacteria and Archaea
2005Proteases from halophilic microorganisms present the advantage of being stable at high salinities, constituting interesting enzymes from a biotechnological point of view. To maintain osmolarity in saline environments the microorganisms adopt mainly two strategies, one followed by most moderately halophilic bacteria, accumulating organic compatible ...
Encarnación Mellado +2 more
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Computational Genome and Pathway Analysis of Halophilic Archaea
2005Halophilic archaea inhabit hypersaline environments and share common physiological features such as acidic protein machineries in order to adapt to high internal salt concentrations as well as electron transport chains for oxidative respiration. Surprisingly, nutritional demands were found to differ considerably amongst haloarchaeal species, though ...
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