All Archaea articles
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NewsCrawling Asgardians: Unexpected dynamics of ancient microbes discovered
Microbiologists placed Asgard archaea in an oxygen-free environment and filmed the living cells under a microscope. This resulted in the first live-cell recordings, which show dynamic changes in shape and a novel crawling movement across surfaces. The results reveal a remarkably dynamic, actin-based cytoskeleton, with parallels to that found in human cells.
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NewsMolecular insight into biological nitrogen fixation close to the boiling point
Scientists have purified a nitrogen-fixing enzyme from a deep-sea microorganism that shows extreme heat-stability and is possibly of ancient origin. The molybdenum-containing enzyme has been captured in a “turnover” state, highlighting a universal mechanistic principle among nitrogenases.
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NewsWhat happens when a shoreline scavenger consumes microplastics?
Researchers report on what happens when wharf roaches, a common shoreline scavenger, eat expanded polystyrene (EPS). Analysis of the wharf roach gut microbiome showed little change, but several rare microbes were found only in the EPS-fed specimens.
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NewsArchaea as “flexitarians”: Ammonia-oxidizing microbes also feed on amino acids
Symbiotic ammonia-oxidizing archaea in marine sponges are not strict specialists, but true “flexitarians”. Research has shown that these microbes dine not only on ammonia but also on amino acids - and presumably do that to communicate with their animal host.
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NewsResearchers find evidence for two independent origins of life
Researchers retraced the origin of enzymes during life’s earliest divergence into bacteria and archaea, and found evidence for two independent origins of life for free-living cells.
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NewsThe Great Barrier Reef has a microbiome too
A study documents over 800,000 microbial genomes, identifying over 500 new bacterial species and over 300,000 distinct viruses in the waters of the Great Barrier Reef.
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NewsResearchers find CRISPR-Cas coordinates layered bacterial defense network
A new study reveals that CRISPR-Cas plays a broader role in bacterial immunity. Rather than acting alone like a solitary sniper shooting at phages, it also serves as a central command center, directing a network of diverse innate immune systems.
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NewsUnique symbiosis bestows magnetic sense to single-celled organism
An international team has discovered a previously unknown magnetotactic ciliate that pursues an unusual strategy: partnership with two other organisms inside its cell.
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NewsEvo 2 brings artificial intelligence closer to reading and writing the language of life
A new artificial intelligence model called Evo 2 can analyze and generate DNA sequences across bacteria, archaea, plants, animals, and other forms of life, marking a major step toward a unified AI system for biology.
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NewsFood waste treatment can boost renewable energy, but a hidden brown byproduct may be holding it back
Researchers have identified a key chemical obstacle in turning food waste into renewable methane, offering a new semi-quantitative way to track melanoidins and showing that higher doses can severely damage the microbial system.
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NewsDeep-sea extremophile yields protein that forms super stable biofilm
Scientists have discovered a protein secreted by a deep-sea extremophile — an organism adapted to extreme environmental conditions — that self-assembles into a biofilm and is highly stable, boosting its potential for biomedical applications.
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NewsSoil moisture tips the balance of nitrogen cycling
A new study reveals that nitrite accumulation is not simply a chemical outcome, but the result of mismatched microbial activities between ammonia oxidizers and nitrite oxidizers.
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NewsNative litter jump-starts microbial recovery in mine soils
By applying litter collected from nearby native woodland to rehabilitated mine land, a study has shown increases in microbial diversity, enrichment of carbon- and nitrogen-cycling microorganisms, and stronger biochemical potential for soil organic matter decomposition and nitrogen mobilization.
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NewsTracking melanoidins to improve food-waste biogas recovery
Higher pretreatment temperatures in food-waste biogas recovery can promote Maillard reactions, generating melanoidins. A study shows that melanoidins increase with hydrothermal temperature and inhibit methane production by disrupting methanogenic microbial communities.
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NewsCaught in the act: A gene jumps into the void
Self-splicing introns are a special group of jumping genes. It is more difficult for a gene to jump into another cell or another species. Until now, it had been assumed that, for this to happen, the jumping genes travelled as ‘hitchhiker’ in the genomes of plasmids or viruses, but researchers have made a surprising observation.
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FeaturesUnder the microscope: extremophiles of the Earth
Extremophiles are microbial organisms that live in extreme environments normally considered uninhabitable. Over the past few decades, extremophiles have been discovered in increasingly bizarre and unexpected environments around the globe, including within acid lakes, plastic recycling centres and even in radioactive sites such as Chernobyl.
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NewsGenomic analysis redefines the origin of eukaryotic cells
A new genetics study using the MareNostrum supercomputer redefines the genetic origin of the last common ancestor of all eukaryotes, highlighting the contribution of novel bacteria and even giant viruses in the emergence of eukaryotic cells.
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NewsWhat dental calculus can tell us about the oral microbiomes of ancient Japan
Microbe DNA from ancient dental calculus offers insights into the past oral microbiomes of the Japanese people, including the phylogeny of the periodontal disease-associated archaeon, Methanobrevibacter oralis.
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NewsExtreme adaptation helps Dead Sea single-celled organisms to swim
Researchers have described in detail a structural adaptation supporting one of the Dead Sea’s few hardy inhabitants — a single-celled archaea called Haloarcula marismortui (H. marismortui). They characterized the proteins that form the archaeal filament, a long tail-like structure essential for movement.
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NewsFrom Asgard to Earth: tiny discoveries hold clues to life’s greatest leap
Stromatolites may hold insights into how complex life began. Researchers have identified a previously unknown microbe living in close partnership with another organism inside these ‘living fossils’.