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:1/22/2015)... ("Company") (BM&FBOVESPA: VLID3 ON), is pleased to inform its shareholders ... Washington,s Department of Licensing, in the United States, awarded ... for driver,s licenses and identification cards to its subsidiary, Valid ... start in January 2015, with enrollment and card production starting ...
(Date:1/22/2015)... Technology Showcase, Hall E -   EyeLock Inc. , a ... will showcase its EyeLock ID technology integrated in a 3D ... Oak Ridge National Laboratory (ORNL) at the 2015 ... authentication technology is being used to validate the driver and ...
(Date:1/22/2015)... Jan. 20, 2015 NXT-ID, Inc. (NASDAQ: NXTD and ... reports on the recent success of the Wocket™ smart wallet at CES ... smart wallet was named as one of the "11 Hot Products at ... Products Launched At CES So Far" by Newseveryday.com and "The top 10 ...
Breaking Biology News(10 mins):Valid USA Signs Contract For Washington Driver's License Issuance 2EyeLock Debuts First Iris Authentication Technology Embedded in 3D Printed Automobile 2EyeLock Debuts First Iris Authentication Technology Embedded in 3D Printed Automobile 3CES Response for NXT-ID's Wocket Smart Wallet Kicks Off 2015 2CES Response for NXT-ID's Wocket Smart Wallet Kicks Off 2015 3
... In a touch-screen display or a solar panel, any conductive ... of indium tin oxide (ITO) for the job, but a ... also be as cheap and easy to manufacture as possible. ... Inc. report the best-ever transparency and conductivity performance for an ...
... , BOSTON, Mass. A pivotal clinical trial ... developed through a collaborative partnership between MassBiologics of ... Serum Institute of India, Ltd., is starting to ... Institute, will evaluate the efficacy of post-exposure prophylaxis ...
... What contaminants lurk in the urban subsurface, and what happens ... into storm drains and creeks to reach groundwater, or even ... soils, somehow allowing them to self-cleanse as they travel? A ... a generous new gift to fund her work. Longtime ...
Cached Biology News:Chemists advance clear conductive thin films 2Clinical trial for rabies monoclonal antibody 2Clinical trial for rabies monoclonal antibody 3New UC Santa Barbara-based project to study contaminants in urban water environment 2New UC Santa Barbara-based project to study contaminants in urban water environment 3New UC Santa Barbara-based project to study contaminants in urban water environment 4
(Date:3/2/2015)... 2015 VLP Therapeutics, LLC. ("VLP"), a ... on the research and development of therapeutic and ... upon a novel and proprietary vaccine technology, today ... Grant Award from the Montgomery County Department of ... is awarded to life sciences companies in ...
(Date:3/2/2015)... 2, 2015  Pfenex Inc. (NYSE MKT: PFNX), ... of biosimilar therapeutics, today announced that it will ... Conference in Miami, FL at the Loews Miami Beach Hotel.  ... of Pfenex, will provide an overview of the ... am ET. A live audio webcast and archive ...
(Date:3/2/2015)... , March 2, 2015 ... to bottom.   Moments ago, Analysts Review ... Sunshine Heart (NASDAQ: SSH ), Synergetics ... Syneron Medical (NASDAQ: ELOS ), Spectranetics (NASDAQ: ... Analysts Review provides a single unified platform for investors, to ...
(Date:3/2/2015)... , March 2, 2015 VG ... developing therapies for autoimmune and infectious diseases, announced ... has issued an important new composition of matter ... through the targeting of CLIP. ... technology underlying VG Life Sciences, VG1177, a synthetic ...
Breaking Biology Technology:VLP Therapeutics Wins the 2015 Life Sciences Impact Grant Award from the Montgomery County Department of Economic Development 2Quarterly Report Card of Biotechnology Companies: New Research on Sunshine Heart, Synergetics USA, Syneron Medical, Spectranetics and Thoratec 2Quarterly Report Card of Biotechnology Companies: New Research on Sunshine Heart, Synergetics USA, Syneron Medical, Spectranetics and Thoratec 3Quarterly Report Card of Biotechnology Companies: New Research on Sunshine Heart, Synergetics USA, Syneron Medical, Spectranetics and Thoratec 4VG Life Sciences Granted Key Composition Of Matter Patent 2VG Life Sciences Granted Key Composition Of Matter Patent 3
... 9 /PRNewswire-FirstCall/ - Chromos Molecular,Systems Inc. ("Chromos" ... an,annual and special meeting held today, its ... (the "Arrangement") involving,among others, Chromos, Calyx Bio-Ventures ... Modatech Systems Inc. ("Modatech") under section,288 of ...
... the second consecutive,year, MedNet Solutions, a leading healthcare ... been recognized by,Inc. magazine as being among the ... growth over the past four years,MedNet was the ... area, and fifth among healthcare-related software companies in ...
... A seven and a half-year study,conducted in the In ... Health Network found that the use of ultraviolet C ... clinically significant,impact on clinical pregnancy rates (CPR). In presenting ... for Reproductive Medicine (ASRM),Kathryn C. Worrilow, Ph.D. reported that ...
Cached Biology Technology:Chromos announces shareholder approval of Arrangement 2Chromos announces shareholder approval of Arrangement 3MedNet Solutions Again Recognized as one of the Fastest Growing US Companies 2Germicidal UVC Lights Improve Clinical Pregnancy Rates for IVF Lab, New Study Finds 2
... The Chromo4 real-time PCR detector is an ... on a DNA Engine or Dyad Disciple ... includes a compact scanning photonics shuttle that ... nm, 500-535 nm, 555-585 nm, 620-650 nm) ...
... are highly sensitive laser confocal systems designed ... advanced scanners that meet your expectations, differentiating ... and optimizing the signal on the bottom ... the range for increased sensitivity. Results with ...
... on four slides. The new ArraySlide 24-4 ... (6mm x 7mm) individual printing surfaces for ... analysis studies. Unlike other systems, this device ... presence of contaminating adhesives. The chamber itself ...
... 3 nmol (individual) with sequence siTrio ... targeted to your target gene of interestis our ... get more than 75% knockdown of your target ... siRNA for transfection and confirmation of optimal transfection ...
Biology Products: