Navigation Links
Mobile DNA part of evolution's toolbox

The repeated copying of a small segment of DNA in the genome of a primeval fish may have been crucial to the transition of ancient animals from sea to land, or to later key evolutionary changes in land vertebrates. The discovery is "tantalizing evidence" that copied DNA elements known as retroposons could be an important source of evolutionary innovations, says the director of the research, Howard Hughes Medical Institute investigator David Haussler.

"The big question is whether this is a special case or whether it's the tip of the iceberg," says Haussler, who is at the University of California, Santa Cruz. A report on the research is published in the May 4, 2006, issue of the journal Nature.

Haussler and his colleagues were led to the discovery through their work on what they call "ultraconserved elements" -- segments of DNA hundreds of nucleotides long that are almost exactly the same in a wide variety of vertebrate organisms. Haussler and postdoctoral fellow Gill Bejerano discovered the ultraconserved elements in 2003, and since then they have been trying to figure out how they arose and what function they serve.

One ultraconserved element in particular caught their eye. "We were very interested in this sequence, because it had a number of copies elsewhere in the genome," says Bejerano, who is the first author of the study. Close copies of the sequence were ubiquitous in amphibians, birds, and mammals, indicating that it served an important function. "We found it in every species for which we have genomes, from frogs to humans," says Bejerano.

Comparing the sequence to other species also turned up a big surprise. When the researchers compared the human ultraconserved element to all the DNA sequences in the public database GenBank, the closest match was to DNA from the coelacanth -- an ancient fish thought to have gone extinct millions of years ago until a live specimen was caught in 1938 off the east coast of South Africa
'"/>

Source:Howard Hughes Medical Institute


Page: 1 2 3 4

Related biology news :

1. Mobile phone use not linked to increased risk of glioma brain tumours
2. On a flys wing, scientists tally evolutions winners and losses
3. Taking evolutions temperature: Researchers pinpoint the energy it takes to make a species
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Mobile DNA part evolution toolbox

(Date:10/15/2014)... biophysics textbook and it describes how life functions and ... into biological systems and provides an understanding of the ... how our genes make proteins that control the dynamics ... an organism. It quantifies the principles of life and ... on both large and small scales. The book is ...
(Date:10/15/2014)... Ebola virus is spreading rapidly and to an unexpected ... in the past and the virus shows a new ... recorded before. For this reason, the German National Academy ... Science and Engineering, and the Union of the German ... on the Ebola epidemic today. , In the statement ...
(Date:10/15/2014)... , Oct. 15, 2014 NXT-ID, Inc. (NASDAQ: ... authentication company focused on the growing mobile commerce market releases photos ... in Times Square on Monday October 13 th . ... David Tunnel and angel investor Mr. Chad A. ... , CEO of NXT-ID thanked his investors and employees "for their ...
Breaking Biology News(10 mins):New book about life as seen from physics 2Academies call for consequences from the Ebola virus epidemic 2Academies call for consequences from the Ebola virus epidemic 3Academies call for consequences from the Ebola virus epidemic 4Academies call for consequences from the Ebola virus epidemic 5Photo Release: NXT-ID Inc. Rings Opening Bell of the NASDAQ Stock Market October 13th 2Photo Release: NXT-ID Inc. Rings Opening Bell of the NASDAQ Stock Market October 13th 3
... University of Michigan researchers and their colleagues recently hastened ... trees in a large-scale, long-term experiment to glimpse the ... bark was stripped from each tree to kill it ... the federally funded experiment Forest Accelerated Succession Experiment (FASET) ...
... of Pacific Islands Forestry have submitted a proposal to ... strawberry guava, a South American tree that has invaded ... in 1825 as a garden plant. The scientists are ... and Natural Resources, and Hawai Department of Agriculture, agencies ...
... May 25, 2008, approaching 5 p.m. PDT, NASA scientists will ... because at that time the Phoenix Mars Mission space vehicle ... a soft landing onto the northern Mars terrain called Green ... the Red Planet. The place got its name after analysis ...
Cached Biology News:U-M scientists remove thousands of aspens to glimpse forest's future 2U-M scientists remove thousands of aspens to glimpse forest's future 3Insect release proposed to control exotic strawberry guava 2Phoenix mission to Mars will search for climate clues 2Phoenix mission to Mars will search for climate clues 3
(Date:10/22/2014)... 22, 2014 Nuvilex, Inc. (OTCQB: NVLX) – ... people worldwide are living with diabetes, with  that number ... The global market for diabetes treatments is approximately $500 ... worldwide died from pancreatic cancer.  Pancreatic cancer is the ... in the United States , and ...
(Date:10/20/2014)... Convey Computer , the leader in ... State University won first place in the 2014 ... the team’s solution achieved the highest overall performance in ... place finisher. , Experts from all segments of the ... challenge, using a variety of design tools, hardware and ...
(Date:10/20/2014)... 20, 2014 PureTech , a science ... healthcare problems, announced today the closing of a ... from Invesco Perpetual, a $120 Billion group of ... PureTech,s existing pipeline forward and to advance new ... scientific creativity to really go for the big ...
(Date:10/19/2014)... (PRWEB) October 20, 2014 ... Industry Meeting (ABIM). ABIM will take ... More information about ABIM 2014 is now ... , Delegates representing companies and organizations from ... and obtain information on the latest products ...
Breaking Biology Technology:Nuvilex Brief Analyst Report: Thinking Outside the Box by BrokerBank Securities, Inc. 2Team from Iowa State Wins 2014 MemoCODE Design Contest Using Convey HC-2ex 2Team from Iowa State Wins 2014 MemoCODE Design Contest Using Convey HC-2ex 3PureTech Announces Expansion with Oversubscribed $55M Funding Round 2PureTech Announces Expansion with Oversubscribed $55M Funding Round 3PureTech Announces Expansion with Oversubscribed $55M Funding Round 4PureTech Announces Expansion with Oversubscribed $55M Funding Round 5PureTech Announces Expansion with Oversubscribed $55M Funding Round 6
... decision last week to merge its Imaging and Printing Group ... Systems Group (IPSG) is a major milestone in HPs journey ... combining these two units, HP has a unified and convincing ... may be the key that turns HPs consumer message into ...
... researchers will show off developments in games that offer real-world ... ,The Academic Advanced Distributed Learning Co-Laboratory , WTN and ... how Games are Shaping Business and Learning, which will center ... applied to the workforce. , ,The video game industry has ...
... Business is booming again at the University of Wisconsin-Madisons ... job-seekers. , ,This is the best hiring situation weve seen ... associate director of ECS . Fall 2004 recruiting was ... are expected to attend Career Connection, the colleges spring job ...
Cached Biology Technology:HP charges toward the living room 2HP charges toward the living room 3Businesses and educators to preview video games for training 2Businesses and educators to preview video games for training 3Companies recruiting more UW engineering students 2Companies recruiting more UW engineering students 3Companies recruiting more UW engineering students 4
Glycerokinase; from Bacillus stearothermophilus...
... The inductive drives of VARIOMAG Magnetic ... as motors, belts, or mechanical bearings, making ... In addition, the VARIOMAG inductive drive can ... water, dust or microorganisms. This is why ...
...
... FL is equipped with ... measurement technologies that complement ... advanced features of Fluoroskan ... Fluoroskan Ascent FL provides ...
Biology Products: