BGSU undergraduates to pilot groundbreaking genome project Dec 13, 2007
They have an ambitious plan, Xu explained, noting that the JGI hopes to sequence the genomes of all cultured bacteria and archaea in the next few years. With more than 5,000 genomes, averaging 4 to 5 million base pairs each, they need the input of a big community, including our BGSU undergraduates, to annotate all that, Xu said. (EurekAlert!)
Fossil Find Gives Clues Of Early Life Dec 4, 2007
22, 2007) Scientists discovered archaea fossils in Ontario that date back some 2. 7 billion years and show the organism coexisted with life's two other known domains, bacteria and eukaryotes. (Science Daily)
Are Aliens Among Us? Nov 20, 2007
Bacteria and archaea, two very different types of microorganisms that descended from a common ancestor more than three billion years ago, have peacefully coexisted ever since, without one eliminating the other. Moreover, alternative forms of life might not have directly competed with known organisms, either because the aliens occupied extreme environments where familiar microbes could not survive or because the two forms of life required different resources. (Scientific American)
Photosynthesis Simulated, Better Leaf Designed Nov 11, 2007
Photosynthesis converts light energy into chemical energy in plants, algae, phytoplankton and some species of bacteria and archaea. Photosynthesis in plants involves an elaborate array of chemical reactions requiring dozens of protein enzymes and other chemical components. (Science Daily)
Tips from the Journals of the American Society for Microbiology Nov 9, 2007
Bacteria, fungi, archaea and viruses are the four microbial groups currently known to man. Bacterial presence in soil has been the most extensively studied, however with the environment at the forefront of worldwide focus, expanded research on fungal, archaeal, and viral communities is much needed ... In the study researchers used an RNA-based analysis technique to examine the richness of bacteria, fungi, archaea, and viruses in samples collected from prairie, desert, and rainforest soils. (EurekAlert!)
Microbial biofilms evoke Jekyll & Hyde effects Oct 27, 2007
The ESF workshop also highlighted greater understanding of the complex interactions within biofilms, which often comprise not just one species of bacteria, but a whole host of different micro-organisms, including archaea, protozoa, fungi, and even tiny metazoa actually comprising multiple cells. Many biofilms are in fact complete micro-ecosystems, within which there is competition as well as cooperation, and unraveling the interactions will reveal valuable insights into how these evolved. (EurekAlert!)
Astrobiology Magazine Oct 23, 2007
Thirty years ago this month, researchers identified the unique domain of life known as archaea. These organisms inhabit some of the harshest environments on Earth, and astrobiologists study many of them as analogs for how life might survive on other planets. (SkyAndTelescope.com)
Thirtieth Anniversary Of Discovery Of Third Domain Of Life Oct 17, 2007
Microbiologist Carl Woese led the team that identified the archaea as a unique domain of life, distinct from bacteria and other organisms. Prior to this finding, generations of evolutionary biologists and microbiologists believed that the microbes now called archaea were simply another taxon among bacteria ... Hidden Before Our Eyes: 30 Years of Molecular Phylogeny, Archaea and Evolution will detail the exacting work that led to the discovery of a third domain of life, the microbes now known as... (Science Daily)
Cells and Viruses Oct 15, 2007
Prokaryotes include the biological domains of Eubacteria (bacteria) and Archaea (ancient bacteria-like organisms). These simple microscopic cells were the first living organisms to evolve. (Suite101.com)
Pasturing Cows Convert Soil To Source Of Methane, Potent Greenhouse Gas Oct 15, 2007
D.: Effects of cattle husbandry on abundance, diversity and activity of methanogenic archaea in upland soils, Nature - ISME 1, 447 - 452 (2007). Note: This story has been adapted from material provided by GSF - National Research Center for Environment and Health. (Science Daily)
Hydrothermal Vents: Hot Spots Of Microbial Diversity Oct 6, 2007
Using a new analytical technique called "454 tag sequencing," the scientists surveyed one million DNA sequences of bacteria and archaea, two of the three major domains of life ... The researchers discovered that while there may be as few as 3,000 different kinds of archaea at these sites, the bacteria exceed 37,000 different kinds. (Science Daily)
Census Of Protein Architectures Offers New View Of History Of Life Oct 6, 2007
His research team compiled a global census of protein architectures, and used these relics to plot the emergence, diversification and refinement of each of the three superkingdoms of life: Archaea, Bacteria and Eukarya ... The research team compiled a global census of protein architectures, and used these relics to plot the emergence, diversification and refinement of each of the three superkingdoms of life: Archaea, Bacteria and Eukarya ... By looking at protein architectures across all... (Science Daily)
Deep sea vents yield new microbes Oct 5, 2007
Researchers identified 37,000 different kinds of bacteria and 3,000 archaea ... By examining the DNA of microbes taken from two hydrothermal vents off the coast of Oregon, researchers identified as many as 37,000 different kinds of bacteria and 3,000 archaea, a type of microorganism distinct from bacteria, according to researchers from the Marine Biological Laboratory at Woods Hole, Mass. (MSNBC -- Environment)
Prokaryotic Cells Oct 1, 2007
The Cellular Components of Archaea and Eubacteria ... These ancestral cells, now represented by members of the domains Archaea and Eubacteria, reproduce by means of binary fission, duplicating their genetic material and then essentially splitting to form two daughter cells identical to the parent. (Suite101.com)
Research finds tolerant bug Sep 27, 2007
Halobacterium NRC-1 is a part of the Archaea kingdom of microorganisms, first discovered more than 30 years ago thriving in extreme environments, such as volcanic hot springs and acids that burn through human skin. The Halobacterium HRC-1 lives in extremely salty bodies of water and pools with repeated drying cycles where other life cannot survive. (Pocatello Idaho State Journal, ID)
Pilot Program Will Conduct Original Lab Research UCLA, Sep. 20 Sep 21, 2007
The pilot program is run by the U.S. Department of Energy's Joint Genome Institute (JGI), which is producing the Genomic Encyclopedia of Bacteria and Archaea. Many of the microorganisms the institute is studying are critical to advancing research at the frontiers of bioenergy, carbon cycling and bioremediation - areas of key importance to the Energy Department's mission. (University of California Newswire, CA)
Bacteria see the light Aug 25, 2007
"I suspect there'll be a huge explosion of data, since performing such experiments concerning dark and light are relatively simple to do." LOV domains are also found in fungi and even in a few Archaea. The protein modules likely evolved in early bacteria and then were co-opted by plants, fungi and other bacteria, Liscum said. (The Scientist)
Ontario mine yields scientific treasures Aug 23, 2007
Organic molecules carry the distinct signature of the organism that originated them -- be it a primitive single-celled archaea, a bacterium or a more advanced, celled structure called a eukaryote, Kenig said in an interview yesterday ... Scientists have suspected archaea, bacteria and eukaryotes went their separate ways around three billion years ago, but it has been hard to pin down the time of the split. (Canada.com)
Ancient Organisms Discovered In Canadian Gold Mine Aug 23, 2007
Scientists have suspected that the three known domains of life -- eukaryotes, bacteria, and archaea -- branched off and went their separate ways around three billion years ago ... The discovery came from chemical examination of shale samples, loaded with oily lipid remains of archaea found in a deep Canadian gold mine near Timmins, Ontario, about 400 miles north of Toronto ... When they analyzed a sample, Kenig said, they were able to pull apart its complex mixture of molecular fossils, and... (Science Daily)
Ancient deep-sea microbes found in Chinese mine Aug 7, 2007
The chimneys are 1 billion years older than similar fossils previously discovered and are nearly identical to the archaea- and bacteria-harboring structures found today on sea beds. "These are remnants of the oldest living types of life forms on the planet," said Timothy Kusky, a geologist at Saint Louis University and co-author of a new study that describes the fossils. (Xinhuanet, China)
Digging in Diapers for History of Gut Bacteria Jun 29, 2007
"Populations are quite unstable over the first few months but by a year of age they resemble each other and also resemble adult guts." Among the microbes that eventually dominate: Bacteroides, Eubacteriales, Clostridium, Ruminococcus and Faecalibacterium, as well as small amounts of fungi and archaea. But these microbes did not start out at the top of the bottom. (Scientific American)
Comprehensive analysis of co-occurring domain sets in yeast proteins Jun 12, 2007
The identified CDSs are shown to preferentially include ancient domains that are conserved from bacteria or archaea. Moreover, the protein sets spanned by these combinations were found to be highly functionally coherent, significantly match known protein complexes, and enriched with protein-protein interactions. (BioMed Central)
Model Methanogens Provide Clues To Possible Mars Life May 29, 2007
For years Kral has studied methanogens, ancient microorganisms from the biological domain Archaea, as potential candidates for what life might look like on Mars. At first glance, Mars appears unfriendly toward most life forms. (Science Daily)
Archaea In Hot Springs Use Ammonia For Energy: May Shed Light On Early Evolution May 26, 2007
Discovered in the late 1970s, archaea are one of the three main branches on the tree of life, with bacteria and eukaryotes such as plants and animals on the other two branches. But scientists are just now gaining a fuller understanding of what archaea do -- in an ecological sense -- to make a living ... A new study led by University of Georgia researchers and announced on Wednesday at the American Society for Microbiology meeting in Toronto finds that crenarchaeota, one of the most common groups... (Science Daily)
B12 Is Also An Essential Vitamin For Marine Life May 21, 2007
B12 contains the metal cobalt and can be synthesized only by certain singled-celled bacteria and archaea ... The sea contains bacteria and archaea that make B12, but their populations are low, particularly in the spring, and so B12 supplies are limited. (Science Daily)
Study of protein folds offers insight into metabolic evolution May 21, 2007
The new, global family tree of protein architecture also revealed that many metabolic protein folds are quite ancient: These architectures were found to be quite common in all the species of bacteria, animals, plants, fungi, protists and archaea the researchers analyzed. Of 776 metabolic protein folds surveyed, 16 were found to be omnipresent, and nine of those occurred in the earliest branches of the newly constructed tree. (Hindu)
Great Bugs of Fire - Volcano Loving Bugs May 19, 2007
They're the archaea, an ancient branch of microbial life on Earth discovered by scientists in 1977. Unlike the better known bacteria and eukaryotes (plants and animals), many of the archaea can thrive in extreme environments like volcanic vents and acidic hot springs ... An enzyme, alcohol dehydrogenase (ADH), is derived from a member of the archaea called Sulfolobus solfataricus. (FirstScience.com)
Chemists pump iron for answers about life in universe Apr 23, 2007
For example, in one of the studies, led by Gergely Katona of France's Universite J. Fourier in Grenoble, researchers answer the question of how some of the simplest life forms bacteria and the curious microbes called archaea, methane-releasing bugs often found in extreme environments use an iron-anchored enzyme called "superoxide reductase" to take oxygen, the very reactive stuff of life, and turn it into a more manageable hydrogen peroxide. The enzyme acts as an "antioxidant" for microbes,... (USA Today -- Tech)
Phylogenetic and functional analysis of the Cation Diffusion Facilitator (CDF) family: improved signature and prediction of substrate specificity Apr 23, 2007
Representative CDF members from all three kingdoms of life (Archaea, Eubacteria, Eukaryotes) were retrieved from genomic databases. Protein sequence alignment has allowed detection of a modified signature that can be used to identify new hypothetical CDF members. (BioMed Central)
Was early Earth purple? Apr 11, 2007
It belongs to a group of organisms called archaea, whose lineage stretches back to a time before Earth had an oxygen atmosphere. Taken together, these different lines of evidence suggest retinal formed earlier than chlorophyll, DasSarma said. (MSNBC -- Technology)
Volcanic Plumbing Dictates Development Of Deep-sea Hydrothermal Vents Mar 23, 2007
For years, geologic theory has predicted that magma production alone is vital to fuel hydrothermal vents, or the "hot smokers" where microorganisms such as the Archaea thrive. These new findings indicate that the volcanic-plumbing system better explains why one volcano hosts hot smokers, while another does not, Toomey said. (Science Daily)
MED: a new non-supervised gene prediction algorithm for bacterial and archaeal genomes Mar 17, 2007
Despite a remarkable success in the computational prediction of genes in Bacteria and Archaea, a lack of comprehensive understanding of prokaryotic gene structures prevents from further elucidation of differences among genomes ... 0 is particularly evident for GC-rich genomes and archaeal genomes ... 0 is shown to reveal divergent translation initiation mechanisms in archaeal genomes while making a more accurate prediction of TISs compared to the existing gene finders and the current GenBank... (BioMed Central)
Millions Of New Genes, Thousands Of New Protein Families Found In Ocean Sampling Expedition Mar 15, 2007
The researchers found that the GOS dataset covered almost all of the known prokaryote (bacterial and archaeal) protein families and that there were 1,700 totally unique large protein families in the GOS dataset, not matching any known families ... The team also found that several protein domains (the conserved structural units in proteins) that were previously thought to exist only in one of the four kingdoms of life (bacteria, archaea, eukaryotes, viruses) have GOS examples in another kingdom. (Science Daily)
Yacht voyage turns up abundant sample of genes Mar 14, 2007
Colleagues at the Venter Institute broke out the DNA of the organisms, mostly bacteria and similar microbes known as Archaea, blasted them apart and then sequenced the DNA.. Powerful computers at the University of California San Diego analyzed the information to figure out which gene sequences carried the codes for amino acids, which in turn make up proteins -- which carry out the functions of a living organism. (Scientific American)
Genes and groups of genes commonly shared between species, studies show Mar 9, 2007
They found that more than half of all the most primitive organisms, Archaea, have one or more protein genes acquired by horizontal gene transfer, as compared to 30 to 50 percent of bacteria that have acquired genes this way ... " Though the Nature findings about mine slime bear on the issue of horizontal gene transfer, the study's main goal was to detect, with high resolution, which organism is able to carry out what function within a natural, uncultivated microbial community, according to... (EurekAlert!)
Life Cycle Mapped Of Unique Organism In Extreme Environments Mar 5, 2007
Professor Rolf Bernander fishing for hyperthermophilic archaea in a hot spring in Yellowstone national park, Wyoming -- not far from the pool where Sulfolobus acidocaldarius was first isolated ... These organisms, from the Sulfolobus genus, represent life s third evolutionary line, the archaea, and are found in hots springs all over the world, for instance in the vicinity of the volcano Vesuvius outside Naples, in Iceland, and in Yellowstone National Park in the U.S. The extreme living... (Science Daily)
Friends of Long Marine Lab supports 11 student projects Jan 1, 2007
Caren Barcel; "Do hitchhiking crabs eat feces of epibionts?" The diet of columbus crabs with sea turtles in the Pacific, looking specifically at crab diet and social structure" Alison Collins "Importance of marine derived nutrients for juvenile steelhead reared in seasonal coastal lagoon" Amanda Jensen "Genetic analysis of Mugil cephalus populations in the Nothern Gulf of California" Michelle Kappes "Oceanographic habitat use of four species of albatrosses: a comparative study" Lana Krol "A... (US Santa Cruz Currents, CA)
Dirty air doesn't worry scientists Dec 27, 2006
There are trillions of bacteria, archaea and fungi in the average teaspoonful of soil and at least hundreds of thousands in pond water ... The Berkeley scientists had Affymetrix, a Santa Clara-based gene chip maker, create a chip with around half a million DNA signatures for germs, all based on a single gene that varies considerably across the 200,000 or so main species of bacteria and archaea. (Inside Bay Area)
Microbe found in California mine could be smallest life form yet Dec 26, 2006
The microbes, members of an ancient family of organisms known as Archaea, formed a pink scum on green pools of hot mine water laden with toxic metals, including arsenic. "It was amazing," said Jillian F. Banfield of the University of California, Berkeley, a member of the discovery team. (Orlando Sentinel -- News)
World's smallest life form discovered Dec 24, 2006
" In their paper, the scientists call the microbes "smaller than any other known cellular life form. " Scientists say the discovery could bear on estimates of the pervasiveness of exotic microbial life, which some experts suspect forms a hidden biosphere extending miles underground whose total mass may exceed that of all surface life. It may also influence the search for microscopic life forms elsewhere in the solar system, a discovery that would prove that life in the universe is not unique to... (San Francisco Chronicle)
Bacterial census of Texas air reveals microbial diversity Dec 23, 2006
He and his team developed a novel microarray called the PhyloChip, which contains about 500,000 probes to detect the 16S ribosomal RNA signatures from 8,741 bacteria and archaea. They probed the chip with amplified 16S rRNA samples taken weekly from air filtration systems in both Austin and San Antonio, which are about 80 miles (128 km) apart, and found between 1,500 and 1,800 bacterial species above each city. (The Scientist)
Tiniest living things found in mine acid and arsenic Dec 23, 2006
The microbes, members of an ancient family of organisms known as archaea, formed a pink scum on green pools of hot mine water laden with toxic metals, including arsenic. advertisement. (AZCentral -- News)
Scientists Make Tiny Discovery Dec 23, 2006
" In their paper, the scientists call the microbes "smaller than any other known cellular life form (Tampa Bay Online, FL -- News)
Shotgun sequencing finds nanoorganisms Dec 22, 2006
Probe of acid mine drainage turns up unsuspected virus-sized Archaea ... All three were so small - the size of large viruses - as to be virtually invisible under a microscope, and belonged to a totally new phylum of Archaea, microorganisms that have been around for billions of years ... Nearly three years ago, Banfield employed shotgun sequencing to pick out the half-dozen bacteria and Archaea in the mine slime. (EurekAlert!)
From Hot Springs To Rice Farms, Scientists Reveal New Insights Into The Secret Lives Of Archaea Dec 12, 2006
So it is with archaea (ar-KEY-uh), a collection of bacteria-like microorganisms whose unique genetics and chemical structure separate them from all other living things. One of our ancestors, Archaea, adapted to live in extreme environments, such as the hot springs in Yellowstone National Park ... For years, biologists have pigeonholed archaea as extremophiles-creatures that live in extreme conditions. (Science Daily)
Scientists Establish Connection Between Life Today And Ancient Changes In Ocean Chemistry Nov 10, 2006
Using data generated by Dupont and Yang, the group established that the three superkingdoms of life Archaea, Bacteria and Eukarya -- all use metals differently. The differences reflect the availability of such metals in the ocean as the respective superkingdoms evolved. (Science Daily)
Researchers Make Nanosheets That Mimic Protein Formation Nov 1, 2006
S-layer proteins comprise the outermost cell envelope of a wide variety of bacteria and other single-celled, prokaryotic organisms called archaea, and they are able to form 2-d sheets with square, hexagonal, and other packings at surfaces and interfaces, as well as suspended in fluid. The group sought to make the connection between the forces governing S-layer protein assembly and the forces governing the nanoparticle assembly. (Science Daily)
Antarctic microbes handle Mars-like conditions Nov 1, 2006
Both microbes are types of Archaea, one of the three major types of life along with (another class of microbes) and Eukaryotes (a group that includes animals, plants, fungi and Protists, e.g. paramecium, algae, protozoa and slime molds). Archaea might be able to survive in many places in the universe beyond Earth, including some of the more than 180 detected in the past decade, or on their terrestrial moons ... The lab-grown archaea also adapted to the cold by aggregating to form biofilms or... (MSNBC -- Technology)
Microbes live Mars-like life Nov 1, 2006
Both microbes are types of Archaea, one of the three major types of life along with Bacteria (another class of microbes) and Eukaryotes (a group that includes animals, plants, fungi and Protists, e.g. paramecium, algae, protozoa and slime molds). Archaea might be able to survive in many places in the universe beyond Earth, including some of the more than 180 extrasolar planets detected in the past decade, or on their terrestrial moons ... The lab-grown archaea also adapted to the cold by... (USA Today -- Tech)
Bacterial 'Switch Gene' Regulates Oceans' Sulfur Emissions Into The Air Oct 31, 2006
Zooplankton are small protozoans that feed on other plankton, and bacterioplankton include bacteria and Archaea (a relatively newly discovered category of sea life) that remineralize organic material down the water column. While researchers had known for some time that phytoplankton can degrade DMSP to DMS, efforts to predict global patterns of ocean-atmosphere DMS flux based solely on the abundance of phytoplankton had been unsuccessful. (Science Daily)
Methane Devourer Discovered In The Arctic Oct 21, 2006
sekann found a new group of methane-consuming Archaea that live in symbiosis with bacteria. This community does not use oxygen but sulphate to oxidize methane. (Science Daily)
Seabed Microbes Munch Methane, Curb Warming - Study Oct 19, 2006
The scientists found a new methane-consuming microbe -- an oxygen-hating type of single-celled archaea dubbed ANME-3 -- living alongside two other known types of microbes by the mud volcano in waters 1,250 metres (4,100 ft) deep ... The study, the first description of a subsea mud volcano habitat including archaea, bacteria and tube worms, found the microbes were able to consume less than 40 percent of methane emitted because they thrived only in a thin layer of mud. (Planet Ark, United States)
Methane-Munching Microbes Take a Bite Out of Warming Oct 19, 2006
These creatures include bacteria, worms, and a previously unknown species from the archaea group of single-celled life-forms. Each creature has an uncommon metabolism that depends on the energy stored in methane, and each processes the gas in a unique way. (National Geographic)
Ancestor of Animals Breathes Nitrogen Sep 7, 2006
Archaea and bacteria benefit by breathing the stuff in the surrounding mud, turning nitrate into dinitrogen gas and getting rid of their organic waste in the process, a chemical reaction known as denitrification. In the lab, G. pseudospinescens consistently respired the nitrate, and close examination of the eukaryote's makeup showed that it did not contain any bacteria that could assist in this process. (Scientific American)
Enceladus Focus Group Meeting Aug 24, 2006
Methanogens are microorganisms in the domain Archaea that inhabit a wide variety of anaerobic environments on planet Earth, many of which would be considered extreme. My laboratory has been studying methanogens for the past thirteen years as a model for life on Mars. (NASA Watch)
Ammonia-loving archaea win landslide majority Aug 17, 2006
"Ammonia oxidation is an important step in the nitrogen cycle that was believed for the last 100 years to be solely performed by bacteria," says Christa Schleper, full professor of Molecular biology of Archaea at University Bergen, Norway ... Using a novel sequencing technique and bioinformatics tools, Stephan C. Schuster, associate professor of biochemistry and molecular biology at Penn State, and his co-workers accurately measured the quantities of active bacteria and archaea in the complex... (EurekAlert!)
Germ of a big idea Aug 14, 2006
These microbes a term that encompasses all forms of microscopic organisms, including bacteria, fungi, protozoa and a form of life called archaea exist everywhere. The vast majority are in the gut. (Toronto Star -- Life)
Interdisciplinary center to study marine microbes Aug 12, 2006
"The primary mission of the center will be to increase understanding of the biology, ecology, and biogeochemistry of marine microorganisms, including bacteria, archaea, single-celled plants, and viruses.". Zehr has done pioneering research on microorganisms that "fertilize" the oceans by converting nitrogen gas into a form that other organisms can use (a process called nitrogen fixation). (US Santa Cruz Currents, CA)
Sequencing The Genome Of A New Kind Of Methane Producer Aug 5, 2006
Methane is a greenhouse gas produced by various groups of microorganisms (methanogenic Archaea) ... The major producer of methane in the roots of rice plants is what is known as "Rice Cluster I" (RC-I) Archaea ... Hybridisation, with specific probes for RC-I Archaea (red fluorescent cells) and bacteria (green fluorescent cells), help identify the various components of the mixed culture. (Science Daily)
Ocean science center opens at UH Aug 2, 2006
"The primary mission of the center will be to increase understanding of the biology, ecology and biogeochemistry of marine microorganisms, including bacteria, archaea, single-celled plants and viruses.". Related Industry stories. (Pacific Business News, HI)
Science snapshot: When genes work like Rube Goldberg machines Jul 31, 2006
Some astrobiologists believe that before life on Earth split into the three major branches that now exist bacteria, eukaryotes (animals, plants and fungi), and the exotic archaea found in deep sea vents and other unlikely settings a microbe ancestral to every one of them made its living in the RNA world. Stable RNA genomes, due to a self-editing capability, would have allowed "a large RNA genome of the last common universal ancestor to exist," the study authors conclude. (USA Today -- Tech)
New Microbe Thrives in Heat and Acid Jul 27, 2006
Further experiments showed that the Archaea-domain critters could prosper in pHs ranging from 3 ... Reysenbach and her team dubbed the microbe Aciduliprofundum boonei based on its preference for environments that are a little sour and deep as well as for David Boone, a pioneer in the study of Archaea, who recently passed away. (Scientific American)
Methane makers yield to science Jul 26, 2006
The archaea are probably the major source of methane emanating from rice fields, contributing up to a quarter of global emissions of the gas ... The archaea live in the soil, in amongst the root system of the rice plant ... The archaea are an ancient branch of microbial life on Earth first identified by scientists in 1977. (BBC News -- Science)
Molecular DNA Switch Found To Be The Same For All Life Jul 18, 2006
Researchers with the U.S. Department of Energy s Lawrence Berkeley National Laboratory and the University of California at Berkeley have shown that the core machinery for initiating DNA replication is the same for all three domains of life - Archaea, Bacteria and Eukarya ... Taken with earlier research that identified AAA+ proteins at the heart of the DNA replication initiator in archaea organisms, these new findings indicate that DNA replication is an ancient event that evolved millions of... (Science Daily)
Life Cycle Of Operons Yields New Look At Bacterial Genetics Jul 7, 2006
Operons are widespread in the genomes of all prokaryotes, archaea as well as bacteria. In the typical prokaryote genome, about half of all the protein-coding genes are located in operons. (Science Daily)
