HOME >> BIOLOGY >> NEWS
Retroviruses shows that human-specific variety developed when humans, chimps diverged

Scientists in the past decade have discovered that remnants of ancient germ line infections called human endogenous retroviruses make up a substantial part of the human genome. Once thought to be merely "junk" DNA and inactive, many of these elements, in fact, perform functions in human cells.

Now, a new study by John McDonald of the University of Georgia and King Jordan at the National Center for Biotechnology Information at the National Institutes of Health, suggests for the first time that a burst of transpositional activity occurred at the same time humans and chimps are believed to have diverged from a common ancestor - 6 million years ago. These new results implicate retroelements, a particular type of transposable elements that are abundant in the human genome, in the actual shift from more rudimentary primates to modern human beings. The research was just published in the journal Genome Letters.

"There is a growing body of evidence that transposable elements have contributed to the evolution of genome structure and function in many species," said McDonald, a molecular evolutionist and head of the genetics department at UGA. "Our results suggest that a bust of transposable element activity may well have contributed to the genetic changes that led to the emergence of the human species." Jordan received his doctoral degree at UGA working with McDonald.

There has been a molecular arms race going on between transposable elements and their host genomes for millions of years. Host genomes are continually evolving new regulatory mechanisms to silence the mutagenic effects associated with the replication of these elements which, in turn, place selective pressure on the elements to evolve mechanisms to escape these controls. The result is an internal drive mechanism to increase biological complexity.

Just as new technologies generated by the military arms races between rival countries get spun off and used for non-military purposes, s
'"/>

Contact: Kim Carlyle
kosborne@uga.edu
706-583-0913
University of Georgia
1-Aug-2002


Page: 1 2 3

Related biology news :

1. New study shows hope for treating inhalant abuse
2. Chemical derived from vitamin-E shows early promise as cancer drug
3. Cancer vaccine based on pathogenic listeria bacteria shows promise targeting metastases
4. Trial shows which brain cancer patients benefit from temozolomide
5. New research shows plants can shuffle and paste gene pieces to generate genetic diversity
6. Preclinical safety study shows adipose-derived stem cells improve heart function after heart attack
7. Simian virus 40 not associated with non-Hodgkin lymphoma, study shows
8. A probable cause for high blood pressure identified - shows links with diabetes
9. Blue marlin in gulf have high mercury levels, A&M study shows
10. New research shows air pollution can reduce childrens lung function
11. Pneumococcal vaccine reduces ear infections, pneumonia, new study shows

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/5/2020)... ... , ... Regenative Labs has received approval from the Centers for Medicare & ... first Wharton’s jelly allografts to be assigned a Q code and be approved for ... Wharton’s jelly allograft product to be recognized as a 361 HCT/P by CMS regulated ...
(Date:7/18/2020)... ... July 16, 2020 , ... A study has been published ... Neoasis™ active noise control device to attenuate typical noises in a simulated neonatal ... the alarm sounds from patient monitors, ventilators and other bedside devices that would ...
(Date:7/2/2020)... ... July 01, 2020 , ... AltruBio Inc. http://www.altrubio.com ... a biologic for the treatment of steroid-refractory acute graft-versus-host disease (SR-aGVHD), at European ... J Martin of the Fred Hutchinson Cancer Research Center, this single-arm, open-label Phase ...
Breaking Biology News(10 mins):
(Date:8/12/2020)... FARMS, Mich. (PRWEB) , ... August 12, 2020 ... ... Consulting Group, Inc. (EMMA International), a global leader in FDA compliance consulting ... of the nation’s fastest-growing private companies. The list represents a unique look at ...
(Date:8/3/2020)... (PRWEB) , ... August 03, 2020 , ... ... collection, today announced Jim Corrigan, President and CEO has been named one of ... broad cross-section of industry sectors, PharmaVoice 100 honorees are selected based on how ...
(Date:7/31/2020)... ... July 29, 2020 , ... R3 Stem Cell International is ... $3950. With 50 million stem cells total, patients may choose which extremities they would ... for arthritic joints (BMC Musculoskelet Disord. 2016). At R3 International, umbilical cord tissue is ...
(Date:7/31/2020)... ... July 29, 2020 , ... ... transmitter systems that can be configured to drive Klystrons, TWTs, IOTs, and magnetrons. ... drive one or two switches in a push-pull configuration; yielding fast fall time ...
Breaking Biology Technology:
Cached News: