Navigation Links
Life's origins were easier than was thought

In the primordial soup that produced life on earth, there were organic molecules that combined to produce the first nucleic acid chains, which were the first elements able to self-replicate. According to one of the more accepted theories, these molecules were ribonucleic acid (RNA) chains, a molecule that is practically identical to DNA and that today has the secondary role in cells of copying information stored in DNA and translating it into proteins.

These proteins have a direct active role in the chemical reactions of the cell. In the early stages of life, it seems that the first RNA chains would have had the dual role of self-replicating (as is today the case with DNA) and participating actively in the chemical reactions of the cell activity. Because of their dual role, these cells are called ribozymes (a contraction of the words ribosome and enzyme). But there is an important obstacle to the theory of ribozymes as the origin of life: they could not be very large in length as they would not be able to correct the replication errors (mutations). Therefore they were unable to contain enough genes even to develop the most simple organisms.

An investigation led by Mauro Santos, from the Department of Genetics and Microbiology at the Universitat Aut´┐Żnoma de Barcelona (Spain), alongside two Hungarian scientists, has shown that the error threshold, that is, the maximum number of errors that may occur during the replication process of ribozymes without this affecting its functioning, is higher than was previously calculated. In practice, this means that the first riboorganisms (protocells in which RNA is responsible for genetic information and metabolic reactions) could have a much bigger genome than was previously thought: they could contain more than 100 different genes, each measuring 70 bases in length (bases are the units that constitute the genes and codify the information), or more than 70 genes, each measuring 100 bases. It is worth remembering t
'"/>

Source:Universitat Autonoma de Barcelona


Page: 1 2

Related biology news :

1. Ancient DNA helps clarify the origins of two extinct New World horse species
2. The genetic origins of corn on the cob
3. Study charts origins of fear
4. The first laugh: New study posits evolutionary origins of two distinct types of laughter
5. Ancient anthropoid origins discovered in Africa
6. RNA enzyme structure offers a glimpse into the origins of life
7. Prehistoric origins of stomach ulcers uncovered
8. Genetic fingerprints identify brain tumors origins
9. Technique makes it easier to see mouse embryo in all its glory
10. T-ray breakthrough could make detecting disease far easier
11. Helium helps patients breathe easier
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Life origins were easier than was thought

(Date:11/18/2014)...  The Secure Identity & Biometrics Association (SIBA) ... the formation of The Airport Entry and Exit ... and Biometric Entry and Exit Solutions Framework for ... from BORDERPOL, the international non-profit organization that works ... regarding border security, traveler and migration systems. ...
(Date:11/18/2014)... -- The Parenteral Drug Association (PDA) today confirmed that seven ... at least seven more will participate in the upcoming 2014 ... in Washington D.C. , Dec. 2-4. ... from the regulatory agencies in the United States ... effort to help advance the use of metrics in the ...
(Date:11/15/2014)... , Nov. 13, 2014  While we may still be ... McCoy used in "Star Trek" to gain instant access to ... to work with smartphones and tablets for monitoring and measuring ... healthcare world. This may seem a tad Orwellian to some, ... adopt some of these technological opportunities into their healthcare regime. ...
Breaking Biology News(10 mins):Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 2Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 3FDA's Janet Woodcock, EMA's Emer Cooke Headline PDA Quality Metrics Conference 2Americans May Be Ready for a Brave New World of Healthcare 2Americans May Be Ready for a Brave New World of Healthcare 3Americans May Be Ready for a Brave New World of Healthcare 4
... Department of Agriculture; and the University of Haifa in Israel ... protein, zinc and iron content in the grain, potentially offering ... children around the world. , Results from the study will ... Science. , "Wheat is one of the world's major ...
... pictures made the cover of Nature in 1998, were ... appears, they may have been. , This week, a ... reinterpreting the 600 million-year-old fossils from the Precambrian era ... understanding of microfossils thought to be the oldest animals," ...
... hunts begin in the Japanese villages of Taiji and Futo, ... has launched a campaign to end the practices through public ... put an end to the hunts. The "Act for Dolphins" ... and the World Association of Zoos and Aquariums (WAZA) --maintains ...
Cached Biology News:Wheat gene may boost foods' nutrient content 2Oldest animal fossils may have been bacteria 2Renewed dolphin slaughter prompts new campaign 2Renewed dolphin slaughter prompts new campaign 3
(Date:12/17/2014)... AUSTIN, Texas , Dec. 16, 2014  Vermillion, ... company focused on gynecologic disease, today announced the next ... into a premier bio-analytics solutions provider with the naming ... to President and Chief Executive Officer, while current Chairman ... will continue to serve as Chairman. These changes are ...
(Date:12/17/2014)... 17, 2014 CASI Pharmaceuticals, Inc. (Nasdaq: ... acquisition, development and commercialization of innovative therapeutics addressing cancer ... with a primary commercial focus on China ... a Type C meeting with the U.S. Food and ... held in February 2015.  During this meeting the Company ...
(Date:12/17/2014)... Dec. 17, 2014   Synageva BioPharma Corp. ... therapeutic products for rare disorders, announced today its presentation ... in San Francisco, CA. ... Executive Officer, will present on Monday, January 12, 2015, ... will be webcast live and may be accessed from ...
(Date:12/15/2014)... & PETACH TIKVAH, Israel ... (NASDAQ: BCLI ), a leading developer of ... that wholly-owned subsidiary Brainstorm Cell Therapeutics Ltd. was awarded ... Israel,s Office of the Chief Scientist (OCS).  ... in receipt of grant support from the Office of ...
Breaking Biology Technology:Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 2Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 3Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 4CASI Pharmaceuticals Granted Type C Meeting With U.S. FDA For ENMD-2076 In Fibrolamellar Carcinoma 2CASI Pharmaceuticals Granted Type C Meeting With U.S. FDA For ENMD-2076 In Fibrolamellar Carcinoma 3CASI Pharmaceuticals Granted Type C Meeting With U.S. FDA For ENMD-2076 In Fibrolamellar Carcinoma 4CASI Pharmaceuticals Granted Type C Meeting With U.S. FDA For ENMD-2076 In Fibrolamellar Carcinoma 5BrainStorm Receives $1,100,000 for its 8th Annual Non-Dilutive Grant from Israel's Chief Scientist Office 2BrainStorm Receives $1,100,000 for its 8th Annual Non-Dilutive Grant from Israel's Chief Scientist Office 3
... SHANGHAI, China, Jan. 31 /Xinhua-PRNewswire/ -- WuXi ... its acquisition of AppTec Laboratory,Services, Inc., a ... device industries. AppTec offers testing, contract research ... a highly,differentiated, fully integrated platform., (Logo: ...
... (Nasdaq: DRRX ) fourth quarter 2007 financial,results press release, you ... live over the Internet on Wednesday, February 6,2008 at 9:00 a.m. ... 6, 2008 at 9:00 a.m. EST (6:00 a.m. PST). Where: ... http://www.durect.com, ...
... AMLN ) will be presenting at the Merrill ... York on,Wednesday, February 6, 2008 at 1:00 p.m. ET ... Finance and Chief Financial Officer of,Amylin Pharmaceuticals, will be ... breakout session will be webcast, and a,recording will be ...
Cached Biology Technology:WuXi PharmaTech Completes Acquisition of AppTec 2
Gap junction protein, beta 2, 26kDa (connexin 26) Antigen: Peptide...
amyotrophic lateral sclerosis 2 (juvenile) chromosome region, candidate 2...
HSPBP1 Antibody...
... CRE-bla HEK 293T cell line contains the ... cAMP response element (CRE). To obtain the ... into HEK 293T cells by lentivirus. Subsequent ... responsive to forskolin stimulation (Figure 1). The ...
Biology Products: