Navigation Links
Single-celled bacterium works 24-7
Date:4/28/2008

ay-night cycle has a tremendous impact on the cells physiology, cycling on and off many vital metabolic processes, not just the obvious ones.

Among the obvious cycling processes are photosynthesis and nitrogen fixation. It is difficult to perform these two functions in the same cell because the two processes are at odds with one another. Fixing nitrogen requires nitrogenase, a catalyst that helps the chemical reaction move forward. Unhelpfully, the oxygen produced by photosynthesis degrades nitrogenase, making nitrogen fixation difficult or impossible in photosynthetic organisms.

Other filamentous cyanobacteria perform photosynthesis and nitrogen fixation in different cells. As a single-celled bacterium, however, Cyanothece cannot separate these antagonistic processes in space. But it can separate them in time. While Cyanothece is active in the daytime for photosynthesis, this research shows that it also has quite the nightlife, unlike other cyanobacteria.

Agreeing with previous studies, this study found that Cyanothece genes for photosynthesis turn on during the day and genes for nitrogen fixation turn on at night. The surprise is the tremendous impact the day-night cycle has on the overall physiology of the cell.

It goes far beyond just the aspects of nitrogen fixation and photosynthesis, said Pakrasi, who also directs Washington Universitys International Center for Advanced Renewable Energy and Sustainability (I-CARES) to encourage and coordinate university-wide and external collaborative research in the areas of renewable energy and sustainability - including biofuels, carbon dioxide mitigation and coal-related issues. The university will invest more than $55 million in the initiative.

Cyanotheces Dark Period

To see the effect of day-night cycles on the overall physiology of Cyanothece, lead author Jana Stckel, Ph.D., Washington University post-doctoral researcher, and other members of this re
'/>"/>

Contact: Gayle Geren
geren@wustl.edu
314-935-7163
Washington University in St. Louis
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Bacterium sequenced makes rare form of chlorophyll
2. Researchers decode genetics of rare photosynthetic bacterium
3. Rain forest protection works in Peru
4. MIT works toward safer gene therapy
5. IdentiPHI Re Launches SAFmodule Software to Secure Novell(R) Networks
6. IdentiPHI Re Launches SAFmodule Software to Secure Novell(R) Networks
7. Alternative food networks connect ethical producers and consumers and can lead to healthier eating
8. Workshops on biotechnology and water for science journalists
9. MIT works toward engineered blood vessels
10. Solidus Networks, Inc. Seats New Board of Directors
11. ESFs workshop restores good name of sugar
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/17/2014)... for chili peppers. Information about archaeological remains of ancient ... the appearance of words for chili peppers in ancient ... and highlight the value of multi-proxy data analysis. Their ... nine papers presented in a special feature issue of ... on plant and animal domestication edited by Dolores ...
(Date:4/17/2014)... detection cartridge developed at Sandia National Laboratories and recently ... faster and cheaper. , Bacillus anthracis , ... soils all over the world and can cause serious, ... The bacteria can survive in harsh conditions for decades. ... occur through skin contact, inhalation of spores or eating ...
(Date:4/17/2014)... day about eight years ago, Katia Silvera , a ... father were on a field trip in a mountainous area ... had never seen before. , Unable to identify it, they ... orchid turned out to be an unnamed species. So Carnevali ... , "Lophiaris" is the genus name, comprising about 40 species ...
Breaking Biology News(10 mins):Chickens to chili peppers 2Chickens to chili peppers 3Pocket-sized anthrax detector aids global agriculture 2Pocket-sized anthrax detector aids global agriculture 3Orchid named after UC Riverside researcher 2Orchid named after UC Riverside researcher 3
... is the world,s largest chemical company. At its headquarters ... two steam crackers, two gas and steam turbine power ... helping make information and data on every plant on ... assembly coordinators, safety experts and asset managers. A virtual ...
... 2, 2012) A Central African protected area that straddles ... been named a World Heritage Site by the United Nations ... Called ... acronym TNS) the site consists of a 25,000 km2 (10,000 ...
... but the prevalence of heart disease in pregnant mothers has ... until they are older. These women, who are generally less ... cholesterol levels and are at greater risk of heart disease ... the heart typically functions better during pregnancy due to a ...
Cached Biology News:Virtual plant planning, retrofitting and maintenance 2UN protects 'wild heart' of Central Africa 2UN protects 'wild heart' of Central Africa 3UCLA study looks at why heart attacks cause so much more damage in late pregnancy 2
(Date:1/15/2014)... January 15, 2014 More than 5 ... about 1 in 3 seniors will die with Alzheimer’s ... These jaw-dropping figures have shocked many Americans into looking ... help prevent these tragic age-related cognitive disorders. Jonathan Weisman, ...
(Date:1/15/2014)... Freeslate, Inc ., the leading ... Lupin Limited, one of India’s top five pharmaceutical companies, ... System for high throughput solid form screening. ... a wide range of quality, affordable generic and branded ...
(Date:1/14/2014)... (PRWEB) January 14, 2014 Histogen, Inc., ... products of cells grown under simulated embryonic conditions, today ... agreement with Suneva Medical, Inc. for physician-dispensed aesthetic products ... , This agreement is an amendment to the ...
(Date:1/14/2014)... BETHESDA, Md. , Jan. 14, 2014  Organovo ... institutes from the National Institutes of Health (NIH) to ... more effective treatments to patients on a faster timeline. ... Translational Sciences (NCATS) and the National Eye Institute (NEI) ...
Breaking Biology Technology:Biohack Pure Offers 5 Tips for Increasing Memory in 2014 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 2Lupin Selects Freeslate’s CM Protégé PharmD System to Accelerate Polymorph Screening for Drug Development 3Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 3Organovo Announces Collaboration with National Institutes of Health 2Organovo Announces Collaboration with National Institutes of Health 3
... Healthy ... Volunteers, RESEARCH TRIANGLE PARK, ... calcium) may now be administered with 100mg of ritonavir, an,agent that increases, ... Food and Drug Administration approved once-daily LEXIVA 1400,mg with 100mg of ritonavir ...
... Corporation,(Nasdaq: GENZ ) announced that the U.S. ... Committee will meet Tuesday to,consider the use of ... who are not on dialysis. FDA asked ... patients on dialysis to provide perspective that will ...
... Campbell Alliance, the leading,management consulting firm specializing ... Ben Bonifant, Vice President,of the firm,s Business Development ... Executive Society (LES) Annual Meeting. The,event will be ... Convention and,Exhibit Centre in Vancouver, Canada. Mr. ...
Cached Biology Technology:FDA Approves Administration of LEXIVA(R) with Lower Dose of 'Boosting' Medication Ritonavir 2FDA Approves Administration of LEXIVA(R) with Lower Dose of 'Boosting' Medication Ritonavir 3FDA Approves Administration of LEXIVA(R) with Lower Dose of 'Boosting' Medication Ritonavir 4Genzyme to Participate in FDA Advisory Committee Meeting on the Use of Phosphate Binders in Chronic Kidney Disease 2Genzyme to Participate in FDA Advisory Committee Meeting on the Use of Phosphate Binders in Chronic Kidney Disease 3Genzyme to Participate in FDA Advisory Committee Meeting on the Use of Phosphate Binders in Chronic Kidney Disease 4Genzyme to Participate in FDA Advisory Committee Meeting on the Use of Phosphate Binders in Chronic Kidney Disease 5Campbell Alliance Business Development Practice to Moderate Two Workshops at LES Annual Meeting in Vancouver 2Campbell Alliance Business Development Practice to Moderate Two Workshops at LES Annual Meeting in Vancouver 3
Preparation TW--Compatibility: no end cap seals -Hybridization Tube for Hybrigene -Comp Dim: 240 80 mm -Material: borosilicate glass -Mfr Desig: Techne FHB-15...
... are designed for the rapid purification of linear ... gels. The DNA band is excised from an,agarose ... within the base of the column are a ... and impurities back while allowing DNA to selectively ...
... Freedom EVOware is Tecans state-of-the-art software ... combines pipetting and scheduling in a single, ... is intuitive and consistent, simplifying the control ... protocols on a Freedom EVO 100 with ...
...
Biology Products: