• Subscribe

iSGTW Feature - Cutting edge computing helps discover the origin of life

Feature - Cutting edge computing helps discover the origin of life


A snapshot from a large-scale molecular dynamics simulation of a 480 base pair DNA plasmid sandwiched between two sheets of a clay mineral. The plasmid structure remains essentially stable and intact at the elevated temperatures and pressures of deep ocean hydrothermal vents, where life on Earth may have originated.
Image courtesy of P V Coveney.

The National Grid Service in the UK and the TeraGrid in the U.S. have joined forces to help University College London scientists shed light on how life on earth may have originated.

Deep undersea secrets

Deep ocean hydrothermal vents have long been suggested as possible sources of biological molecules, such as RNA and DNA, but it was unclear how they could survive the high temperatures and pressures that occur round these vents.

Peter Coveney and colleagues at the UCL Centre for Computational Science have used computer simulation to provide insight into the structure and stability of DNA while inserted into layered minerals. Their results were recently published in the Journal of the American Chemical Society.

"Computational grids are only now being made easy to use for scientists, enabling simulations of sufficient size to model these large biomolecule and mineral systems," Coveney explains.

Deep ocean hydrothermal vents have long been suggested as possible sources of biological molecules, such as RNA and DNA, but it was unclear how they could survive the high temperatures and pressures that occur round these vents. Image copyright of OAR/National Undersea Research Program (NURP); NOAA

Animal, vegetable or mineral?

Previous experimental studies have shown that molecules such as DNA can be inserted into minerals called layered double hydroxides, but no one has thus far been able to show at the level of atoms and molecules how the DNA interacts with the mineral, or how the DNA might look inside the mineral layers. These minerals would have been common in the earliest age of Earth, around 2500 million years ago.

Coveney's simulations reproduced the high temperatures and pressures that occur around hydrothermal vents, showing that the structure of DNA inserted into layered minerals becomes stabilized at these conditions and therefore protected from catalytic and thermal degradation.

From years to hours of CPU time

"Grids of supercomputers are essential for this kind of study", says Coveney. "The time taken to run these simulations is reduced from the years that a desktop computer would take, to hours by using the many thousands of processors made available across continents."

Working together with colleagues at Nottingham and Durham Universities, Coveney's group has been researching routes to the origin of life for many years, studying the way that genetic information may have arisen and been replicated, as well as how small molecules may have formed.

- Gillian Sinclair, National Grid Service

Join the conversation

Do you have story ideas or something to contribute? Let us know!

Copyright © 2018 Science Node ™  |  Privacy Notice  |  Sitemap

Disclaimer: While Science Node ™ does its best to provide complete and up-to-date information, it does not warrant that the information is error-free and disclaims all liability with respect to results from the use of the information.

Republish

We encourage you to republish this article online and in print, it’s free under our creative commons attribution license, but please follow some simple guidelines:
  1. You have to credit our authors.
  2. You have to credit ScienceNode.org — where possible include our logo with a link back to the original article.
  3. You can simply run the first few lines of the article and then add: “Read the full article on ScienceNode.org” containing a link back to the original article.
  4. The easiest way to get the article on your site is to embed the code below.