Navigation Links
Scientists unlock mystery in important photosynthesis step
Date:2/19/2010

Tempe, Ariz. - An international team of scientists, including two from Arizona State University, have taken a significant step closer to unlocking the secrets of photosynthesis, and possibly to cleaner fuels.

Plants and algae, as well as cyanobacteria, use photosynthesis to produce oxygen and "fuels," the latter being oxidizable substances like carbohydrates and hydrogen. There are two pigment-protein complexes that orchestrate the primary reactions of light in oxygenic photosynthesis: photosystem I (PSI) and photosystem II (PSII). Understanding how these photosystems work their magic is one of the long-sought goals of biochemistry.

The ASU scientists working with collaborators at the Max Planck Institute at Mlheim a.d. Ruhr in Germany have been investigating the PSI reaction center.

They have made an important observation that is nut-shelled in the title of a paper published in this week's online Early Edition of the Proceedings of the National Academy of Sciences (PNAS). The paper is titled "Independent initiation of primary electron transfer in the two branches of the photosystem I reaction center."

Kevin Redding, an associate professor in the department of chemistry and biochemistry in the College of Liberal Arts and Sciences, is leading the research at ASU. His lab created mutations in a single-celled green alga (Chlamydomonas reinhardtii or 'Chlamy' for short). Using these mutants, Redding and collaborators have shown that the primary light-triggered electron transfer event in the PSI reaction center can be initiated independently in each of its parallel branches. At the same time, they showed that PSI has two charge separation devices that effectively work in parallel to increase the overall efficiency of electron transfer.

"Although we knew that both branches were being used in PSI, and that our mutations had an effect upon the relative use of each pathway, what we did not know was how these mutatio
'/>"/>

Contact: jenny Green
jenny.green@asu.edu
480-241-6608
Arizona State University
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. UK scientists working to help cut ID theft
2. Scientists show that mitochondrial DNA variants are linked to risk factors for type 2 diabetes
3. Comet probes reveal evidence of origin of life, scientists claim
4. Scientists link fragile X tremor/ataxia syndrome to binding protein in RNA
5. Male elephants get photo IDs from scientists
6. Scientists retrace evolution with first atomic structure of an ancient protein
7. Muscle mass: Scientists identify novel mode of transcriptional regulation during myogenesis
8. Carnegie Mellon scientists develop nanogels that enable controlled delivery of carbohydrate drugs
9. Clemson scientists shed light on molecules in living cells
10. Scientists tackle mystery mountain illness
11. T. rex quicker than Becks, say scientists
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Scientists unlock mystery in important photosynthesis step
(Date:8/29/2014)... news release is available in German . ... chemical signals between organisms is considered the oldest form ... interactions between conspecifics, for example, the sexual attraction between ... social responses and to coordinate reproductive behavior in males ... the University of the Algarve in Faro, Portugal, and ...
(Date:8/29/2014)... of the Tibetan plateau -- the largest topographic anomaly ... both its profound effect on climate and its reflection ... GSA Bulletin , Katharine Huntington and colleagues employ a ... modern and fossil snail shells to investigate the uplift ... , Views range widely on the timing of surface ...
(Date:8/28/2014)... new study reports that an expansion of marine protected ... key ecological functions. According to investigators from the ... protecting fish have focused on saving the largest numbers ... that provide key and difficult-to-replace ecological functions. ... performed by fish species that also are food for ...
Breaking Biology News(10 mins):Ready for mating at the right time 2Ready for mating at the right time 3Snails tell of the rise and fall of the Tibetan Plateau 2Snails tell of the rise and fall of the Tibetan Plateau 3Snails tell of the rise and fall of the Tibetan Plateau 4Snails tell of the rise and fall of the Tibetan Plateau 5Snails tell of the rise and fall of the Tibetan Plateau 6Snails tell of the rise and fall of the Tibetan Plateau 7Study finds marine protected areas inadequate for protecting fish and ocean ecology 2
... 2010) Today, the Association for Molecular Pathology (AMP) ... Genetics, Health and Society (SACHGS) meeting focused on whole ... and its incorporation into clinical practice, AMP raised ethical ... "In the next five years, the application of ...
... 2010) -- Atmospheric research often focuses on clouds, impact on weather ... with a base some 6,000 feet above earth. University of ... other end of the air column closer to homethe bottom of ... boundary layer. A report on his team,s work appears in a ...
... in the atmosphere rise, policy makers and scientists are ... with the greenhouse gas. One method ... otherwise known as carbon sequestration. CCS, a newly developing ... from the Earth,s atmosphere. Donald J. ...
Cached Biology News:AMP commends SACGHS whole genome sequencing focus, raises ethical questions and forms working group 2AMP commends SACGHS whole genome sequencing focus, raises ethical questions and forms working group 3
(Date:8/28/2014)... “This kit has an improved extraction efficiency and provides users ... said Mark Tess, PhD, Mycotoxin Product Manager for Charm Sciences. ... USDA-GIPSA inspection agencies that have a need to detect aflatoxin ... a matter of minutes with nothing but our equipment and ... grain before accepting it, but they no longer have to ...
(Date:8/28/2014)... , Aug. 28, 2014  Next month, executives from clinical ... key industry events beginning with Patient-Centered Clinical Trials 2014 ... Boston , September 4-5. Patient recruitment experts ... Aaron Fleishman will share insights on the benefits ... variety of tactics – from media to mobile apps – ...
(Date:8/28/2014)... 2014 Scientists, researchers, and technologists will ... Laser Damage 2014 symposium. Marking its 46th year, ... will run 14-17 September. The event is sponsored by ... . , The premier conference for basic and applied ... optical materials will engage researchers and engineers from numerous ...
(Date:8/28/2014)... New York, NY (PRWEB) August 28, 2014 ... has renewed its long term partnership with PTI ... to provide clients with state of the art leak ... state of the art instruments currently available. As part ... a new High Voltage Leak Detection Instrument ...
Breaking Biology Technology:BBK Worldwide Leads Sessions at Key September Events 2Laser Damage to Draw Researchers, Engineers, Scientists to 46th Annual Conference 2Laser Damage to Draw Researchers, Engineers, Scientists to 46th Annual Conference 3Whitehouse Labs Renews Partnership with PTI Inspection Systems 2Whitehouse Labs Renews Partnership with PTI Inspection Systems 3
... 14 Neurocrine Biosciences,Inc. (Nasdaq: NBIX ) announced ... been appointed President and Chief Executive,Officer and a member ... will step down as President and Chief Executive Officer ... of the Board of,Directors., "While this was a ...
... Industry Ltd. (Nasdaq: SHMR ) ("Shamir"), a ... progressive ophthalmic lens,market, announced today that its board ... aggregate amount of US$ 4.0 million (approximately NIS,15.1 ... rate of,exchange), or approximately US$ 0.243 (approximately NIS ...
... ... Meet Growing Global Demand, WILMINGTON, Del., Jan. ... Fanandakis group vice president - DuPont Applied,BioSciences. In this newly ... a range of bio-based,products and technologies to meet growing global ...
Cached Biology Technology:Neurocrine Announces Appointment of Kevin Gorman, Ph.D., as President and Chief Executive Officer 2Shamir Optical Industry Ltd. Announces Declaration of a Cash Dividend 2Shamir Optical Industry Ltd. Announces Declaration of a Cash Dividend 3DuPont Names Nicholas Fanandakis as Group Vice President - DuPont Applied BioSciences 2
... VersArray ChipReader systems are highly sensitive ... of microarrays. These are advanced scanners that ... response and background level, and optimizing the ... the top end of the range for ...
... assays on four slides. The new ArraySlide ... 96 (6mm x 7mm) individual printing surfaces ... screening analysis studies. Unlike other systems, this ... the presence of contaminating adhesives. The chamber ...
... with sequence siTrio siRNA --- a ... target gene of interestis our most popular product. ... 75% knockdown of your target gene when used ... and confirmation of optimal transfection with one of ...
... are rigid macroporous hydrophilic media. The rigid ... moderate pressures, while the macroporous beads enhance ... matrix reduces nonspecific binding. Macro-Prep High Q ... with very high flow rates and resolution. ...
Biology Products: