Using paleo-experimental evolution process, Georgia Tech researchers have revived a 500 million year old gene from bacteria and inserted it into modern-day E. coli bacteria.

What Gadget you are getting this Holiday?

View Results

Loading ... Loading ...
1 Star2 Stars3 Stars4 Stars5 Stars (Rate This)
Loading ... Loading ...

Using a process called paleo-experimental evolution, Georgia Tech researchers have revived a 500 million year old gene from a bacterium (singular of bacteria) and inserted it into a modern-day Escherichia coli (E. coli) bacterium. This bacterium has now been growing for more than 1,000 generations and may help the scientists better observe the evolution in action.


500 Million Year Old E. coli Bacteria Created in Georgia Tech Lab, Image Credit : johnwinter.net

The whole experiment was conducted by Betül Kaçar, a NASA astrobiology postdoctoral fellow in Georgia Tech’s NASA Center for Ribosomal Origins and Evolution. In 2008, Kaçar’s postdoctoral advisor, Associate Professor of Biology Eric Gaucher, successfully determined the ancient genetic sequence of Elongation Factor-Tu (EF-Tu), an essential protein in E. coli. Elongation Factors are one of the most abundant proteins in bacteria, found in all known cellular life and required for bacteria to survive.

Hybridizing the ancient 500 million year old gene with modern E. Coli bacteria using paleo-experimental evolution process was a difficult task. After achieving the difficult task of placing the ancient gene in the correct chromosomal order and position in place of the modern gene within E. coli, Kacar and her colleagues allowed the bacteria to grow for 500 generations. They observed that the growth rates increased gradually after the first 500 generations until some of them were even better off than the modern, unaltered strains.

1, Image Credit : Georgia Institute of Technology
500 Million Year Old Bacteria Recreated In Georgia Laboratory, Image Credit : gawkerassets.com
2, Image Credit : Georgia Institute of Technology
3, Image Credit : Georgia Institute of Technology

Kaçar produced eight identical bacterial strains which allowed “ancient life” to re-evolve. The scientists sequenced the genomes of all eight lineages to determine how the bacteria have adapted. They found that the ancient EF-Tu did not accumulate mutations. Instead, the modern proteins that were interacting with the ancient gene inside the bacteria mutated. The mutations were responsible for the increased fitness of the chimera strains. That is, the ancient genes did not mutate to become more similar to the modern form but found a novel evolutionary pathway.

Interestingly, some of the altered lineages actually became healthier than their modern counterpart. These results were presented at the NASA International Astrobiology Science Conference. The scientists said that they were still studying the new bacterial generations to determine whether the proteins will follow the historical path and become more similar to the modern form or whether a new or novel evolutionary path will be selected.

Source : Georgia Tech researchers
Thanks To : io9, Daily Mail

Buy Cheapest Related Product From Amazon.com


Sapphire Disk Will Tell Our Stories For Millions Of Years, Even After Human Civilization

Rare Footage Shot In 1953 Reveals The Sound Of A Real Nuclear Blast
You can also press the left/right arrow key on your keyboard to go to previous/next post
  On July 16, 2012(2 years, 2 months ago.)

Recent Products

Buy Now | Compare  
Buy Now | Compare  
Buy Now | Compare  
Buy Now | Compare  
Compare  

What Do You Think?

Loading Disqus Comments ...
Loading Facebook Comments ...

Recent Search

Recent Tutorials

The trick will let you to check your Facebook messages in the original app without downloading Messenger and it works with both iPhone or Android phone.
Want to block all disgusting ads from your android device? Read the tutorial to know how you can block ads on your Android and save data.
Want to repair your memory card? It's very easy to fix corrupted or damaged memory card. In fact you can fix it by yourself.
Are you the one who is frustrated because of the speed of your Android device? No worries, the article will help you increase the speed of that device.
Lately, Google has updated its Google Docs. Now users can crop, rotate, and add borders to images in a document without leaving Google Docs.
Adobe CS products are not free, but the good news is you can now download Photoshop CS2 & all other CS2 product completely free and it's absolutely legal.
At the beginning level, many people don't know how to use Gmail properly. For them, a here's a helpful guideline.
Skype now allows you to call directly from your Outlook account. Find the step-by-step installation process from this tutorial.
This tutorial helps you quickly resolve four of the most common problems that occur with Windows XP.
After releasing Look Back, many people didn't like it. So Facebook planned to add an Edit tool to the feature and now you can edit your Facebook Look Back video.
Close You Have To Login
User:
Pass:
Login With »Login With TwitterLogin With Facebook