Navigation Links
Where bacteria get their genes

ow at the Centre national de la recherche scientifique (CNRS) in France. The research was funded by the Department of Energy and the National Science Foundation.

Lateral gene transfer, unique to the bacterial world, has long been recognized as common. But until now scientists did not know which of a bacterium's genes came from lateral gene transfer and which had been inherited from its parent.

In their study, the scientists focused on the best-studied group of bacteria, the Gamma-Proteobacteria. It includes many human pathogens, including Salmonella, Shigella, pathogenic E. coli, and Pseudomonas.

Ochman's team compared the bacterial species by analyzing their genomic sequence data. The researchers then computed family trees, taking into account the acquired genes, and matched the trees to an established reference tree. For all genes, the match was about 95 percent. This showed that the widespread mechanism of lateral gene transfer does not interfere with the traditional approach of using family trees to infer relationships. Ochman's team found that only 205 genes of Gamma-Proteobacteria's approximately 7,205 genes are shared by all species. The vast majority of genes found in the group comes from lateral gene transfer. "Most of these occur in one or a few species only," Ochman said. "But these are the genes that make bacteria different from each other."

Most commonly, genes are transmitted by bacteriophages, viruses that specifically hijack bacteria cells. Like tiny syringes, phages inject their own genetic material into the host cell, forcing it to produce new phages. During such an event, genes from the bacterial genome can be incorporated into the newly made phages. They inject their newly modified genetic load into other bacteria. This way, bacteriophages act as shuttles, taking up DNA from one bacterium and dumping it into another. Bacteria can also make contact by tiny connection tubes through which they exchange pieces of DNA.
'"/>

Source:University of Arizona


Page: 1 2 3

Related biology news :

1. Where Bacteria Get Their Genes
2. Where jumping genes fear to tread
3. Where have all the butterflies gone?
4. Where we change our mind
5. Anti-bacterial additive widespread in U.S. waterways
6. A bacterial genome reveals new targets to combat infectious disease
7. Discovery of key proteins shape could lead to improved bacterial pneumonia vaccine
8. Scientists discover that host cell lipids facilitate bacterial movement
9. Family trees of ancient bacteria reveal evolutionary moves
10. Drug-resistant bacteria on poultry products differ by brand
11. Programmable cells: Engineer turns bacteria into living computers
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Where bacteria get their genes

(Date:7/11/2014)... July 3, 2014, Shenzhen, China Researchers from Salk ... for the first time evaluated the safety and ... and successfully developed a new method, TALEN-HDAdV, which ... pluripotent stem cell (hiPSC). This study published online ... important theoretical foundation for stem cell-based gene therapy. ...
(Date:7/11/2014)... team of researchers, including scientists from the Max Planck ... reported a major step in understanding photosynthesis, the process ... the oxygen in its atmosphere and which is therefore ... , The researchers report the first direct visualization ... the step in which a specific protein complex, photosystem ...
(Date:7/11/2014)... 11, 2014 Researchers have pioneered a revolutionary ... new technology, called Virtual Finger, allows scientists to ... neurons and synapses using the flat surface of ... 3D imaging studies orders of magnitude more efficient, ... level across many areas of experimental biology. The ...
Breaking Biology News(10 mins):A new genome editing method brings the possibility of gene therapies closer to reality 2A first direct glimpse of photosynthesis in action 2Virtual finger enables scientists to navigate and analyze complex 3D images 2
... potential as a large-scale, emission-free energy source, bat and ... fatalities annually. Migratory bats, such as the hoary bat, ... as they fly their routes in the forested ridges ... the immediate area, but is also detrimental to ecosystem ...
... 2007 and based in Toronto, ArcticDx has developed a ... specifically designed to determine one,s inherited risk for age-related ... blindness in the developed world, affecting over 10% of ... undertake studies in support of a planned filing for ...
... 2010 issue of " Environmental Pollution " details ... rabbit,s food resulted in the abiotic (non-biological) transformation ... reducing the levels of these estrogen hormones by ... research has practical implications since it could point ...
Cached Biology News:Slight change in wind turbine speed significantly reduces bat mortality 2OGI invests in personalized medicine for age-related macular degeneration 2UC research: Rabbit's food brings luck in decreasing estrogen levels in wastewater 2UC research: Rabbit's food brings luck in decreasing estrogen levels in wastewater 3
(Date:7/10/2014)... Capital, a firm specializing in acquiring and managing food ... the Slim-Fast brand from Unilever. Unilever will retain a ... were not disclosed. Slim-Fast is a branded ... shakes, powders, bars and snacks to retail customers throughout ... United Kingdom and Ireland.  The ...
(Date:7/10/2014)... in the fight against terrorism with the creation of ... with the use of light and special glass fibres. ... B: Chemical , the researchers describe a novel optical ... low as 6.3 ppm (parts per million). It requires ... "Traditionally explosives detection has involved looking for metals that ...
(Date:7/10/2014)... RICHLAND, Wash. The lithium-ion batteries that power our ... run longer on a single charge with the help ... the porous material to replace the graphite traditionally used ... more than 10 times the energy storage capacity of ... lithium-ion battery electrode was published today in Nature ...
(Date:1/15/2014)... approach akin to assembling a club sandwich at ... (NIST) researchers have succeeded in crafting a uniform, ... of foam commonly used in upholstered furniture and ... nanotube-coated polyurethane foam was reduced 35 percent compared ...
Breaking Biology Technology:Kainos Capital Acquires Slim-Fast From Unilever 2Detecting trace amounts of explosives with light 2Silicon sponge improves lithium-ion battery performance 2Silicon sponge improves lithium-ion battery performance 3Layered security: Carbon nanotubes promise improved flame-resistant coating 2
... STRONG BACKGROUND IN BIOTECHNOLOGY, SHANGHAI, China, Aug. ... Bulletin Board: SOBM) is pleased to,announce that it ... financial,advisor to evaluate strategic alternatives to maximize shareholder ... the results obtained from the work,undertaken to date ...
... Nathan,s Famous Hot Dog Eating,contest may have Joey ... Del Rosario "champ.", The senior human resources associate ... earlier this month when she won Brown &,Toland,s inaugural ... American Heart Association., Brown & Toland recognizes the ...
... /PRNewswire-FirstCall/,-- Oridion Systems Ltd. (SWX: ORIDN) today ... leading global medical device and service company.,With ... technology in its new, compact and ultra-lightweight ... the importance of monitoring CO2, has,decided to ...
Cached Biology Technology:Sinobiomed Retains CB Capital Partners as Financial Advisor to Maximize Shareholder Value 2Sinobiomed Retains CB Capital Partners as Financial Advisor to Maximize Shareholder Value 3Bacon Eating Contest Raises Money for American Heart Association 2Oridion Expands its OEM Partnerships - New Agreement with Spacelabs Healthcare 2Oridion Expands its OEM Partnerships - New Agreement with Spacelabs Healthcare 3Oridion Expands its OEM Partnerships - New Agreement with Spacelabs Healthcare 4
lid holder -see Blotters (Semi-Dry) for more info...
... QPlate is the consumable ... 16 contains 16 individually controlled ... contains a sophisticated liquid flow ... fast and precise solution and ...
This kit is designed to select cells labeled with phycoerythrin- (PE-) conjugated antibodies. Kit includes reagents for labeling 3 x 10 9 cells and EasySep magnet....
... bring you ease of use and rapid solutions to meet your laboratory's requirements for data management ... ... ... CLARA® is the standard software for Staccato Systems and ...
Biology Products: