Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Tough Enough for Mars, but Deinococcus is from Earth

26.09.2007
Results of a recent study titled “Deinococcus geothermalis: The Pool of Extreme Radiation Resistance Genes Shrinks,” will be published in the Sept. 26 edition of PLoS ONE.

The study headed by Michael J. Daly, Ph.D., associate professor at the Uniformed Services University of the Health Sciences’ (USU), Department of Pathology, reports the whole-genome sequence of Deinococcus geothermalis, which is only the second for an extremely radiation- and desiccation-resistant bacterium. The first was for the Guinness World Records-holder Deinococcus radiodurans, which for 50 years has been the subject of extensive investigations aimed at solving the mystery of how this microbe and its close relatives survive immense doses of x-rays and gamma-rays.

Most surprisingly, many of the unique D. radiodurans genes that were strongly implicated in resistance over the last decade have turned out to be unrelated to its survival, and are not present in D. geothermalis. Using computer-based systems to compare the D. geothermalis genome sequence with the sequence of D. radiodurans, a minimal set of genes which encode extreme resistance was defined. Far fewer genes than initially believed appear to be responsible for the extreme resistance trait, which bodes well for the long-term prospects of conferring radiation resistance to other organisms. The phenomenal resistance of Deinococcus bacteria has given rise to numerous descriptions of their origin, including that they evolved on Mars under harsh cosmic radiation. The present analysis firmly places the origin of Deinococcus bacteria on Earth, where the evolutionary steps that led to their survival mechanisms clearly occurred in their terrestrial ancestors - most likely in a desert near you.

The complete manuscript can be read in PLoS ONE at: http://www.plosone.org. PLoS ONE is an open-access, peer-reviewed journal which reports primary research from all disciplines within science and medicine. By not excluding papers on the basis of subject area, PLoS ONE facilitates the discovery of the connections between papers whether within or between disciplines.

Deinococcus geothermalis was chosen for whole-genome sequencing by the U. S. Department of Energy (DOE), Office of Science, Office of Biological and Environmental Research with Dr. Daly as the Principal Investigator. The genome sequence was acquired at the DOE-Joint Genome Institute (JGI), Walnut Creek, CA, and subjected to comparative analysis at the National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health (NIH), Bethesda, Md. D. geothermalis was previously engineered by Daly’s group for cleanup of radioactive waste sites. The three-year project was a collaboration between USU, DOE-JGI, NIH, DOE’s Advanced Photon Source and Pacific Northwest National Laboratory, and the Russian Academy of Sciences.

USU is located on the grounds of the National Naval Medical Center in Bethesda, Md. The university provides military and public health-relevant education, research, service and consultation to the nation and the world, pursuing excellence and innovation during times of peace and war.

Andrew Hyde | alfa
Further information:
http://www.plosone.org
http://www.plosone.org/doi/pone.0000955

More articles from Studies and Analyses:

nachricht Rutgers-led innovation could spur faster, cheaper, nano-based manufacturing
14.02.2018 | Rutgers University

nachricht New study from the University of Halle: How climate change alters plant growth
12.01.2018 | Martin-Luther-Universität Halle-Wittenberg

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Attoseconds break into atomic interior

A newly developed laser technology has enabled physicists in the Laboratory for Attosecond Physics (jointly run by LMU Munich and the Max Planck Institute of Quantum Optics) to generate attosecond bursts of high-energy photons of unprecedented intensity. This has made it possible to observe the interaction of multiple photons in a single such pulse with electrons in the inner orbital shell of an atom.

In order to observe the ultrafast electron motion in the inner shells of atoms with short light pulses, the pulses must not only be ultrashort, but very...

Im Focus: Good vibrations feel the force

A group of researchers led by Andrea Cavalleri at the Max Planck Institute for Structure and Dynamics of Matter (MPSD) in Hamburg has demonstrated a new method enabling precise measurements of the interatomic forces that hold crystalline solids together. The paper Probing the Interatomic Potential of Solids by Strong-Field Nonlinear Phononics, published online in Nature, explains how a terahertz-frequency laser pulse can drive very large deformations of the crystal.

By measuring the highly unusual atomic trajectories under extreme electromagnetic transients, the MPSD group could reconstruct how rigid the atomic bonds are...

Im Focus: Developing reliable quantum computers

International research team makes important step on the path to solving certification problems

Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can’t manage. But how do you test a quantum computer to...

Im Focus: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Basque researchers turn light upside down

23.02.2018 | Physics and Astronomy

Finnish research group discovers a new immune system regulator

23.02.2018 | Health and Medicine

Attoseconds break into atomic interior

23.02.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>