HOME >> BIOLOGY >> NEWS
Battle between bubbles might have started evolution

Howard Hughes Medical Institute researchers are proposing that the first battle for survival-of-the-fittest might have played out as a simple physical duel between fatty bubbles stuffed with genetic material. The scientists suggest that genetic material that replicated quickly may have been all the bubbles needed to edge out their competitors and begin evolving into more sophisticated cells.

This possibility, revealed by laboratory experiments with artificial fatty acid sacs, is in sharp contrast to a current theory of the earliest evolution of cells, which suggests that cellular evolution was driven by primordial genetic machinery that actively synthesized cell membranes or otherwise influenced cell stability or division.

The researchers, led by Howard Hughes Medical Institute investigator Jack W. Szostak, published their findings in the September 3, 2004, issue of the journal Science. Szostak and first author Irene Chen, both from Massachusetts General Hospital and Harvard Medical School, collaborated on the studies with Richard Roberts of the California Institute of Technology.

Cells are basically sacs encapsulated by bilayered membranes of fatty acids and other lipids, plus proteins. A central question in evolution is how simple versions of these cells, or vesicles, first arose and began the process of competition that drove the evolution of life.

"Most of the previous thinking about how cells grew and evolved was based on the idea of the initial evolution of structural RNAs or ribozymes -- enzymes that could synthesize membrane molecules," said Szostak. The ribozymes might have made more membrane material while the structural RNAs might have formed a cytoskeleton that influenced stability, shape, growth or division, he said.

However, Szostak and his colleagues theorized that a far simpler physical process might explain why cells would compete with one another for the materials necessary to expand their size.

"We propos
'"/>

Contact: Jennifer Michalowski
michalow@hhmi.org
301-215-8576
Howard Hughes Medical Institute
2-Sep-2004


Page: 1 2 3

Related biology news :

1. AAAS hosts Battle of the Brains to choose area student for international competition
2. Battle of the DNA bulge may help thwart cancer
3. Battle lasers
4. System failure to blame for Walkerton, North Battleford outbreaks, says U of T study
5. Researchers working to devise plan for Palo Alto Battlefield Restoration
6. Battle of the sexes leads to a biological arms race
7. Battle of the sexes leads to evolutionary arms race
8. Battle to save last stronghold of the red squirrel
9. Baby Dolphin "Little Orphan Annie" Loses Battle For Her Life
10. Late Blight Battle Goes Online, Marking 150 Year Struggle Since Irish Potato Famine
11. Landmark agreement between Samoa and UC Berkeley could help search for AIDS cure

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


(Date:6/27/2019)... ... June 27, 2019 , ... Lighting designers from integrated design firm ... honored the designers for creating both engaging and energy efficient lighting systems. , The ... office tower in San Diego, California earned an IES Illumination Award of Merit in ...
(Date:6/20/2019)... ... June 19, 2019 , ... ... Infectious Diseases Society of America Foundation, and the possibly millions of dollars of ... infectious agents in AD, are a “welcome affirmation” of the need to investigate ...
(Date:6/16/2019)... (PRWEB) , ... June 14, 2019 , ... ... Americans invited to lecture at the fifth annual Neodent World Congress. Attended by ... the innovative progress and latest advancements in the world of dentistry. The three-day ...
Breaking Biology News(10 mins):
(Date:6/18/2019)... ... ... Personalized Stem Cells, Inc (“PSC”), a human adipose-derived stem cell company, ... a person’s own adipose-derived stem cells to treat their osteoarthritis. The first clinical trial ... is the first of several planned clinical trials which will enable qualified PSC-enrolled physicians ...
(Date:6/11/2019)... ... June 10, 2019 , ... Advancements with Ted Danson ... scheduled to broadcast 4Q/2019. Check your local listings for more information. , Advancements ... how its technology facilitates laboratories to improve efficiency and quality of research by ...
(Date:6/11/2019)... ... June 11, 2019 , ... ... Stem Cells Inc. (PSC) , has announced that their GMP facility for cell ... Drug Branch for manufacturing. This is an important milestone for VetStem as ...
(Date:5/31/2019)... ... ... For many years, the primary forms of cancer treatment have been chemotherapy, radiation and ... led to the advent of Chimeric Antigen Receptor T (CAR T) cell therapy, which ... The CAR enables the final product to produce chemicals in the hopes that the ...
Breaking Biology Technology:
Cached News: