Navigation Links
Genetic adaptations key to microbe's survival in challenging environment
Date:2/10/2009

The genome of a marine bacterium living 2,500 meters below the ocean's surface is providing clues to how life adapts in extreme thermal and chemical gradients, according to an article published Feb. 6 in the journal PLoS Genetics, an open-access publication published by the Public Library of Science.

The research focused on the bacterium Nautilia profundicola, a microbe that survives near deep-sea hydrothermal vents. Microorganisms that thrive at these geysers on the sea floor must adapt to fluctuations in temperature and oxygen levels, ranging from the hot, sulfide- and heavy metal-laden plume at the vents' outlets to cold seawater in the surrounding region.

The study combined genome analysis with physiological and ecological observations to investigate the importance of one gene in N. profundicola. That gene, called rgy, allows the bacterium to manufacture a protein called reverse gyrase when it encounters extremely hot fluids from the Earth's interior.

Previous studies found the gene only in microorganisms growing in temperatures greater than 80C, but N. profundicola thrives best at much lower temperatures.

"The gene's presence in N. profundicola suggests that it might play a role in the bacterium's ability to survive rapid and frequent temperature fluctuations in its environment," said Assistant Professor of Marine Biosciences Barbara Campbell, the study's lead scientist.

Additional University of Delaware contributors were Professor of Marine Biosciences Stephen Craig Cary, Assistant Professor of Marine Biosciences Thomas Hanson, and Julie Smith, marine biosciences doctoral student. Also collaborating on the project were researchers from the Davis and Riverside campuses of the University of California; the University of Louisville; the University of Waikato in Hamilton, New Zealand; and the J. Craig Venter Institute in Rockville, Md.

The researchers also uncovered further adaptations to the vent environment, including genes necessary for growth and sensing environmental conditions, and a new route for nitrate assimilation related to how other bacteria use ammonia as an energy source. Photosynthesis cannot occur in the hydrothermal vents' dark environment, where hot, toxic fluids oozing from below the seafloor combine with cold seawater at very high pressures.

These results help to explain how microbes survive near the vents, where conditions are thought to resemble those found on early Earth. Nautilia profundicola contains all the genes necessary for life in conditions widely believed to mimic those in our planet's early biosphere and could aid in understanding of how life evolved.

"It will be an important model system," Campbell said, "for understanding early microbial life on Earth."


'/>"/>

Contact: Elizabeth Boyle
boylee@udel.edu
302-831-0465
University of Delaware
Source:Eurekalert  

Related biology news :

1. CSHL scientists discover how companion cells to sperm protect them from genetic damage
2. Genetic study shows direct link between vitamin D and MS susceptibility gene
3. Effectiveness of progesterone in reducing preterm births may be altered by genetic predisposition
4. CSHL scientists clarify editing error underlying genetic neurodegenerative disease
5. Researchers identify 4 genetic hotspots associated with psoriasis
6. Scientists uncover new genetic variations linked to psoriasis
7. Consumers desire more genetic testing, but not designer babies
8. Far-reaching genetics topics to be addressed: 2009 Annual Clinical Genetics Meeting, March 25-29
9. Scientists unlock possible aging secret in genetically altered fruit fly
10. Researchers genetically link Lou Gehrigs disease in humans to dog disease
11. Genetic testing not cost-effective in guiding initial dosing of common blood thinner
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Genetic adaptations key to microbe's survival in challenging environment
(Date:3/11/2016)... 11, 2016 --> ... report "Image Recognition Market by Technology (Pattern Recognition), by ... by Deployment Type (On-Premises and Cloud), by Industry Vertical ... by MarketsandMarkets, the global market is expected to grow ... Billion by 2020, at a CAGR of 19.1%. ...
(Date:3/10/2016)...   Unisys Corporation (NYSE: UIS ) today ... is testing its biometric identity solution at the Otay Mesa ... help identify certain non-U.S. citizens leaving the country. ... help determine the efficiency and accuracy of using biometric technologies ... run until May 2016. --> the United ...
(Date:3/9/2016)... Germany , March 9, 2016 ... country,s government identified that more than 23,000 public service ... or had been receiving their salary unlawfully.    ... African country,s government identified that more than 23,000 public ... name or had been receiving their salary unlawfully.    ...
Breaking Biology News(10 mins):
(Date:4/29/2016)... ... 29, 2016 , ... Intelligent Implant Systems announced today that the two-level components ... in the United States. These components expand the capabilities of the system and ... beginning in October of 2015, the company has seen significant sales growth in 1Q ...
(Date:4/28/2016)... , April 28, 2016 The ... and Brayton Cryocoolers), Service (Technical Support, Product Repairs & ... - Global Forecast to 2022", published by MarketsandMarkets, the ... Billion by 2022, at a CAGR of 7.29% between ... data Tables and 94 Figures spread through 159 Pages ...
(Date:4/28/2016)... ... April 28, 2016 , ... Connecticut Innovations ... companies, today announced the launch of VentureClash , a $5 million global ... , “VentureClash looks to attract the best early-stage companies here in Connecticut, around ...
(Date:4/28/2016)... ... April 28, 2016 , ... ... investments in recruiting top industry experts, and expanding its LATAM network and logistics ... tools for clients to manage their clinical trial projects. , The expansion will ...
Breaking Biology Technology: