Navigation Links
Scientists discover animal-like urea cycle in tiny diatoms in the ocean

of diatoms, specifically P. tricornutum, and cellular mechanisms for nutrient utilization in the environment, leading to the finding that diatoms have a functional urea cycle.

This was a stunning discovery, says Allen, because it was thought that the urea cycle originated with the metazoan (animal) branch of life.

There it has played an important role in facilitating a wide range of physiological innovations in vertebrates.

For example, urea synthesis enables rapid control of minerals and salts in the blood in animals such as sharks, skates, rays and bony fish, and ammonia detoxification associated with water retention in amphibians and mammals.

The latter was likely a prerequisite for life on land, and subsequently enabled the biochemical pathways necessary for processing a high-protein diet.

Allen and others have now shown that the urea cycle originated hundreds of millions of years before the appearance of metazoans.

The team used RNA interference techniques to partially silence a key urea cycle enzyme in diatoms.

Paper co-author Alisdair Fernie of the Max-Planck Institute of Molecular Plant Physiology evaluated the metabolite profile of diatoms with and without an impaired urea cycle.

Then Allen analyzed the data and found that urea cycle metabolites are critical for cellular recycling of carbon and nitrogen.

The metabolites are also important for facilitating the rapid onset of exponential growth characteristic of diatom recovery from nutrient starvation.

"It appears that the animal urea cycle, critical for cellular export of carbon and nitrogen wastes, was co-opted from an ancestral pathway that originally evolved as a nitrogen and carbon recycling and recovery mechanism," says Allen.

"This is a very interesting finding we didn't expect to see, and essentially changes the way we view diatoms relative to animals and plants."

The work also sug

Contact: Cheryl Dybas
National Science Foundation

Page: 1 2 3

Related biology news :

1. Smithsonian scientists report changes in vegetation determine how animals migrate
2. Johns Hopkins scientists reveal nerve cells navigation system
3. BC scientists link to European Consortium studying human genome
4. Antibodies help protect monkeys from HIV-like virus, NIH scientists show
5. More than 20 percent of atheist scientists are spiritual
6. Scientists sequence genomes of 2 major threats to American food and fuel
7. Hitting target in cancer fight now easier with new nanoparticle platform, UCLA scientists say
8. UCSF scientists honored by National Academy of Sciences
9. Weizmann Institute scientists discover: A protein that contributes to obesity
10. Scientists track evolution and spread of deadly fungus, one of the worlds major killers
11. Scripps Research scientists create new genetic model of premature aging diseases
Post Your Comments:
Related Image:
Scientists discover animal-like urea cycle in tiny diatoms in the ocean
(Date:8/26/2014)... a pen a New Zealand endemic tree has for the ... group of ,weedy, Australian shrubs and small trees. A New ... surprises and discover astonishing cryptic diversity behind what was long ... the open access journal PhytoKeys . , ... was one of the many discoveries made in the north-western ...
(Date:8/26/2014)... such as global warming and poverty the result ... fall on our failure as consumers to make ... in the Journal of Consumer Research , ... problems from governments to consumers and ultimately benefits ... politicians to encourage responsible consumption instead of implementing ...
(Date:8/26/2014)... planet can produce much more land-plant biomass the ... other terrestrial plant parts than previously thought. , ... and Technology , recalculates the theoretical limit of terrestrial ... than many current estimates allow. , "When you try ... to make some simplifying assumptions," said University of Illinois ...
Breaking Biology News(10 mins):And then there were 10 -- unexpected diversity in New Zealand kanuka genus Kunzea 2And then there were 10 -- unexpected diversity in New Zealand kanuka genus Kunzea 3An inconvenient truth: Does responsible consumption benefit corporations more than society? 2Study: Earth can sustain more terrestrial plant growth than previously thought 2Study: Earth can sustain more terrestrial plant growth than previously thought 3
... A new study by civil engineers at MIT shows that using ... by as much as 3 percent a savings that could ... or $15.6 billion at today,s oil prices. This would result in ... tons. The study, released in a recent peer-reviewed report, ...
... JOSE, Calif., May 22, 2012 /PRNewswire-iReach/ -- ... announces that Chief Technology Officer, Sebastien Taveau, will participate ... at NFC Solutions Summit 2012. The session will take place ... San Francisco Airport, in Burlingame, CA. At ...
... Hebrew University of Jerusalem have achieved, for the first ... of Fragile X patients. The discovery paves the way ... expression in Fragile X patients. Fragile X syndrome ... affecting hundreds of thousands of patients worldwide. The syndrome ...
Cached Biology News:Civil engineers find savings where the rubber meets the road 2Civil engineers find savings where the rubber meets the road 3Validity CTO to Present Natural ID Solutions for Improving Mobile Risk Management and User Experience at NFC Solutions Summit 2012 2Stem cell research paves way for progress on dealing with Fragile X retardation 2
(Date:8/26/2014)... A team of engineers from Singapore has successfully ... (WSN) for satellite communications. , With the weight ... design, constructing a lightweight, low power-consuming, wireless communication ... satellite has always been a challenge for system ... Research Centre of Nanyang Technological University in Singapore ...
(Date:8/26/2014)... -- An analysis by Replikins, Ltd. of Pubmed data ... in Pubmed, has revealed extensive conservation and sharing of ... sharing of specific Replikin gene structures has permitted the ... did for the H5N1 influenza vaccine and the Taura ... to be effective (1,2). This Dengue ...
(Date:8/26/2014)... , Aug. 26, 2014 Technology ... the symbol (NUUU) has two (2) wholly- owned ... two subsidiaries harness scientifically advanced technology to provide ... NUUU,s Renuell Int,l, Inc. is launching ... skin care products that is made possible because ...
(Date:8/26/2014)... 2014 Genedata, a leading provider ... life science research, today announced the Genedata ... held in Asia, Europe, and North America during ... and leading research organizations will gather for annual ... studies, and upcoming challenges in all areas of ...
Breaking Biology Technology:ZigBee in the Sky 2Technology Applications International Corporation, Trading Symbol NUUU now trading on NASDAQ's Over the Counter Bulletin Board (OTC BB) 2Thought Leaders to Explore Innovations in SPR & Combination Screening at Genedata Screener User Group Meetings 2Thought Leaders to Explore Innovations in SPR & Combination Screening at Genedata Screener User Group Meetings 3
... whopping portfolio of 16 Nanotechnology products and processes ... Release" organized to mark the fifty-second anniversary celebrations ... the portfolio, Director, Center of Excellence in Nanotechnology ... set of products and processes demonstrates potential development ...
... EAST LANSING, Mich. Researchers at Michigan State University ... while cleaning up nuclear waste and other toxic metals. ... and patented, are published in the current issue of ... The implications could eventually benefit sites forever changed ...
... WEST LAFAYETTE, Ind. - Researchers are making progress in ... sidestepping an obstacle thought to dramatically limit the material,s ... a one-atom-thick layer of carbon that conducts electricity with ... 2004 - which earned a Nobel Prize in physics ...
Cached Biology Technology:AIT unveils portfolio of 16 nanotechnology products 2Microbes generate electricity while cleaning up nuclear waste 2Innovation is step toward digital graphene transistors 2
Collected from 8-12 week old sexually mature rats. Pricing: $100/unit for 1 - 10 units...
PlusOne Acrylamide PAGE, 1 kg. Category: Electrophoresis Systems & Standards & Reagents, Electrophoresis Standards and Reagents, Gel Casting Chemicals....
... The RiboGreen RNA Quantitation Kit is ... systems for the quantitation of RNA ... approximately 1000-fold more sensitive than absorbance ... can be detected with fluorescence microplate ...
... GenoStat Inducible Expression System provides tightly regulated ... cells and is capable of repeated on/off ... mediated by the highly specific interaction between ... nuclear receptor complex. Gene expression levels are ...
Biology Products: