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Latest Prokaryote Stories

2012-04-05 21:23:44

A single gene mutation can sweep through a population, opening the door for the concept of 'species' in bacteria Bacteria are the most populous organisms on the planet. They thrive in almost every known environment, adapting to different habitats by means of genetic variations that provide the capabilities essential for survival. These genetic innovations arise from what scientists believe is a random mutation and exchange of genes and other bits of DNA among bacteria that sometimes...

2011-10-05 19:05:58

Scientists call it LUCA, the Last Universal Common Ancestor, but they don't know much about this great-grandparent of all living things. Many believe LUCA was little more than a crude assemblage of molecular parts, a chemical soup out of which evolution gradually constructed more complex forms. Some scientists still debate whether it was even a cell. New evidence suggests that LUCA was a sophisticated organism after all, with a complex structure recognizable as a cell, researchers report....

2011-04-14 12:10:39

Remote lochs along the west coast of Scotland are turning up new evidence about the origins of life on land. A team of scientists from the University of Sheffield, the University of Oxford and Boston College, who are exploring rocks around Loch Torridon, have discovered the remarkably preserved remains of organisms that once lived on the bottom of ancient lake beds as long as a billion (1,000 million) years ago. These fossils illuminate a key moment in the history of evolution when life made...

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2010-02-18 12:55:00

A team of biologists has unraveled the biochemistry of how bacteria so precisely time cell division, a key element in understanding how all organisms from bacteria to humans use their biological clocks to control basic cellular functions. The discovery, detailed in the February 19 issue of the journal Cell, provides important clues to how the biological clocks of bacteria and other "prokaryotic" cells"”which lack cell nuclei"”evolved differently from that of "eukaryotic" cells...

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2010-01-20 11:10:39

EMBL discovery could yield evolutionary insights and new model organism Although they are present almost everywhere, on land and sea, a group of related bacteria in the superphylum Planctomycetes-Verrucomicrobia-Chlamydiae, or PVC, have remained in relative obscurity ever since they were first described about a decade ago. Scientists at the European Molecular Biology Laboratory (EMBL) in Heidelberg, Germany, have discovered that these poorly-studied bacteria possess proteins thought to exist...

2009-10-06 15:10:30

When it comes to the two basic types of cells, prokaryotes and eukaryotes, compartmentalization is everything. Prokaryotes are evolutionarily ancient cells that only have a membrane surrounding their outer boundary, while the more complex eukaryotes have an outer membrane and membrane bound compartments within the cell. Perhaps most notable is the double layered membrane that surrounds the nucleus, the cellular compartment which houses the cell's genetic material. The genetic material is very...

2009-08-19 13:29:00

MOFFETT FIELD, Calif., Aug. 19 /PRNewswire-USNewswire/ -- Humans might not be walking on Earth today if not for the ancient fusing of two microscopic, single-celled organisms called prokaryotes, NASA-funded research has found. (Logo: http://www.newscom.com/cgi-bin/prnh/20081007/38461LOGO) By comparing proteins present in more than 3000 different prokaryotes -- a type of single-celled organism without a nucleus -- molecular biologist James A. Lake from the University of California at Los...

2009-08-19 14:06:48

A NASA-funded study suggests humans might not exist today if not for the ancient fusing of two microscopic, single-celled organisms called prokaryotes. Biologist James Lake of the UCLA Center for Astrobiology compared proteins present in more than 3,000 different prokaryotes -- a type of single-celled organism without a nucleus -- and discovered two major classes of relatively simple microbes fused together more than 2.5 billion years ago. That endosymbiosis, or merging of two cells, he said,...

2009-08-19 15:10:00

Humans might not be walking on Earth today if not for the ancient fusing of two microscopic, single-celled organisms called prokaryotes, NASA-funded research has found. By comparing proteins present in more than 3000 different prokaryotes - a type of single-celled organism without a nucleus - molecular biologist James A. Lake from the University of California at Los Angeles' Center for Astrobiology showed that two major classes of relatively simple microbes fused together more than 2.5...

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2008-02-22 08:28:50

UCLA biochemists and colleagues have answered an important question about the structure of microcompartments "” the mysterious molecular machines that seem to be present in a wide variety of pathogens and other bacteria. In the Feb. 22 issue of the journal Science, the biochemists report how the microcompartment structure closes in three dimensions, forming a shell around the enzymes encased inside. If scientists could prevent or disrupt the formation of these microcompartments, they...


Word of the Day
lunula
  • A small crescent-shaped structure or marking, especially the white area at the base of a fingernail that resembles a half-moon.
This word is a diminutive of the Latin 'luna,' moon.
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