Navigation Links
'Hot-bunking' bacterium recycles iron to boost ocean metabolism
Date:1/10/2011

In the vast ocean where an essential nutrientironis scarce, a marine bacterium that launches the ocean food web survives by using a remarkable biochemical trick: It recycles iron.

By day, it uses iron in enzymes for photosynthesis to make carbohydrates; then by night, it appears to reuse the same iron in different enzymes to produce organic nitrogen for proteins.

The bacterium, Crocosphaera watsonii, is one of the few marine microbes that can convert nitrogen gas into organic nitrogen, which (just as it does on land) acts as fertilizer to stimulate plant growth in the ocean. So the ocean's productivity is limited by nitrogen, which in turn is limited by scanty supplies of iron for the enzymes needed to make organic nitrogen.

This newfound capacity to conserve precious iron and use it in day-night shifts to satisfy two different metabolic demands reveals a surprising key to life on our planet, say scientists at Woods Hole Oceanographic Institution (WHOI) and Massachusetts Institute of Technology (MIT). They reported their findings Jan. 10 in the Proceedings of the National Academy of Sciences.

The scientists call the strategy "hot bunking," referring to ships that sail with fewer bunks than sailors on board. The bunks are kept continuously hot, as sailors finishing night shifts hop into bunks newly emptied by sailors arising for day shifts.

Crocosphaera uses iron-containing nitrogenase enzymes to convert dissolved nitrogen gas into organic nitrogen (a process called nitrogen "fixing"). As the sun comes up, the bacterium breaks down these enzymes, releasing iron that can be used to make photosynthetic enzymes needed to convert dissolved carbon dioxide into carbohydrates. When the sun goes down, many of the photosynthetic enzymes are broken down, releasing the iron again to be recycled into nitrogenase.

Crocosphaera belongs to a subgroup of bacteria called cyanobacteria. "They have a
'/>"/>

Contact: Media Relations
media@whoi.edu
508-289-3340
Woods Hole Oceanographic Institution
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. TB bacterium uses its sugar coat to sweeten its chances of living in lungs
2. Scientists sequence genome of the N2-fixing, soil-living bacterium Azotobacter vinelandii
3. UTSA biology researchers demystify elusive war zone bacterium
4. Bacterium helps formation of gold
5. Brand new species of bacterium found in the Gullmarsfjord north of Gothenburg
6. Student research team sequences genome of bacterium discovered in Virginia Tech garden
7. Overcoming anthrax bacteriums natural defenses could hold key to new treatments
8. Biosensors reveal how single bacterium gets the message to split into a swimming and a stay-put cell
9. Native-like spider silk produced in metabolically engineered bacterium
10. Cancer-causing bacterium targets tumor-suppressor protein
11. Army can boost mission success by better managing
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/30/2014)... your doctor to know what goes wrong with your muscles ... to know what "normal" actually is. That,s where a new ... FASEB Journal comes in. In the ... set of molecules that can help scientists "see" which genes ... more, they found never-before-detected gene activity and that men have ...
(Date:9/30/2014)... ARLINGTON HEIGHTS, Ill. (September 30, 2014) People who ... they can do to control their asthma besides properly ... to a new article in the Annals of ... the American College of Allergy, Asthma and Immunology (ACAAI), ... by examining their lifestyle. The woman described in the ...
(Date:9/29/2014)... DC Monday, September 29: Between 1970 and ... fish around the globe dropped 52 percent, says ... World Wildlife Fund (WWF). This biodiversity loss occurs ... resource use of high-income countries. , In addition ... report,s data point to other warning signs about ...
Breaking Biology News(10 mins):Scientists identify which genes are active in muscles of men and women 2Asthma symptoms kicking up? Check your exposure to air pollution 2Half of global wildlife lost, says new WWF report 2
... part of the Genome Canada Large-Scale Applied Research Project ... to 16 projects across the country, the researchers in ... with the aim of identifying genes or proteins for ... target cancers and other diseases. The first project, ...
... - New research from the University of Calgary,s Faculty ... diagnosis using an iPhone application with the same accuracy ... technology can be particularly useful in rural medical settings. ... neurologists, regardless of where the physicians and patients are ...
... has revealed how infection by a parasitic fungus dramatically changes ... leonardi ), causing them to become zombie-like and to die ... fungus. The multinational research team studied ants living high up ... research will be published in the BioMed Central open-access journal ...
Cached Biology News:OGI genomics researchers awarded $23 million 2OGI genomics researchers awarded $23 million 3iPhone can diagnose stroke: study 2Zombie ants have fungus on the brain, new research reveals 2
(Date:10/1/2014)... October 01, 2014 As the world takes ... room for doubt that this century would mark the beginning ... field of medicine science. The fact that the world is ... unknown to the scientific community. Almost half of these chronic ... can be prevented with medical care and intervention. While the ...
(Date:10/1/2014)... (PRWEB) September 30, 2014 New applications ... arrangements that have evolved in nature over millennia are ... bioinspired materials for applications in biophotonics in the ... . The journal is published by SPIE, the international ... Library. Several of the peer-reviewed articles are accessible via ...
(Date:10/1/2014)... 01, 2014 The U.S. Department of ... Illinois University Edwardsville as part of the Trade Adjustment ... funding is co-administered by the Department of Labor and ... of Labor Thomas E. Perez and Secretary of Education ... job-driven training grants to nearly 270 colleges across the ...
(Date:9/30/2014)... WASHINGTON D.C., September 30, 2014 Applying a ... of researchers at Harvard University has demonstrated the ... surface -- work that holds promise for making ... and detailing the sides of next-gen rocket ships ... When light passes through oil in water, it ...
Breaking Biology Technology:Fighting Mortality and Morbidity of Chronic Health Disorders during Open Access Week 2Fighting Mortality and Morbidity of Chronic Health Disorders during Open Access Week 3Biomimetic and bioinspired materials enable new healthcare options, reports Journal of Biomedical Optics 2Biomimetic and bioinspired materials enable new healthcare options, reports Journal of Biomedical Optics 3U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 2U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 3U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 4Taking thin films to the extreme 2
... 11, 2011 Novavax, Inc. (Nasdaq: NVAX ... by the Tech Council of Maryland (TCM), the largest ... communities of Maryland.  Novavax was recognized as the firm ... community and for its presence and leadership in Maryland. ...
... May 11, 2011 Verenium Corporation (Nasdaq: ... the development and commercialization of high-performance enzymes, ... will present at two upcoming conferences. Mr. ... Solutions Conference as part of the "Biofuels" panel discussion ...
... Ill., May 11, 2011 Naurex Inc., a clinical-stage ... psychiatry and neurology, today announced the completion of an ... Partners and Latterell Venture Partners.  Druid BioVentures, Genesys Capital, ... in the round.  Naurex will use the proceeds from ...
Cached Biology Technology:Novavax Named Biotechnology Firm of the Year by Tech Council of Maryland 2Verenium to Present at Upcoming Conferences 2Verenium to Present at Upcoming Conferences 3Naurex Completes $18 Million Series A Financing 2Naurex Completes $18 Million Series A Financing 3Naurex Completes $18 Million Series A Financing 4Naurex Completes $18 Million Series A Financing 5Naurex Completes $18 Million Series A Financing 6Naurex Completes $18 Million Series A Financing 7
Request Info...
Agarose-LE, 500 g. Suitable for soft agarose cloning. Nuclease-free.Gel point (1.5%): 36 1.5 C, EEO (-mr): 1200 g/cm2. Category: Nucleotides & Enzymes & Biochemicals, Ultrapure Biochemicals ....
Request Info...
Request Info...
Biology Products: