Navigation Links
Scientists stitch up photosynthetic megacomplex
Date:11/28/2013

Robert Blankenship, PhD, PARC's director and the Lucille P. Markey Distinguished Professor of Arts & Sciences, said that one outcome of the work in the long term might be the ability to double or triple the efficiency of crop plants now stuck at a woeful 1 to 3 percent. "We will need such a boost to feed the 9 or 10 billion people predicted to be alive by 2050," he said.

Wizards of the lab

The scientists worked with the model organism often used to study photosynthesis in the lab, a cyanobacterium, sometimes called a blue-green alga.

Cyanobacteria are ancient organisms, known from fossils that are 3.5 billion years old, nearly as old as the oldest known rocks, and thought to be the first organisms to release oxygen into the noxious primitive atmosphere.

All photosynthesizing organisms have light-harvesting anntenas made up of many molecules that absorb light and transfer the excitation energy to reaction centers, where it is stored as charge separation.

In free-living cyanobacteria the antenna, called a phycobilisome, consists of splayed rods made up of disks of proteins containing intensely colored bilin pigments. The antenna sits directly above one reaction center, Photosystem II, and kitty corner to the other, Photosystem I.

PARC research scientist Haijun Liu, PhD, proposed stitching together the megacomplex and then engineered a strain of cyanobacteria that has a tag on the bottom of Photosystem II.

The mutant cells were treated with reagents that stitched together the complexes, then broken open, and the tag used to pull out Photosystem II and anything attached to it.

To figure out how the proteins were interconnected, the scientists repeatedly cut or shattered the proteins, analyzing them by mass spectrometry down to the level of the individual amino acid.

The amino acid sequences derived in this way were then compared to known sequences within the megacomplex, and the lo
'/>"/>

Contact: Diana Lutz
dlutz@wustl.edu
314-935-5272
Washington University in St. Louis
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Scripps Research Institute scientists achieve most detailed picture ever of key part of hepatitis C
2. UCLA research may help scientists understand what causes pregnancy complications
3. Scientists discover how leukemia cells exploit enhancer DNA elements to cause lethal disease
4. Smithsonian scientists honored as AAAS Fellows
5. Scientists offer recommendations for delaying resistance to Bt corn in western corn rootworm
6. 5 IU scientists named AAAS Fellows for their notable contributions
7. University Of Massachusetts Medical School scientists re-imagine how genomes are assembled
8. Rice scientists ID new catalyst for cleanup of nitrites
9. Chinese scientists reveal the genomic enigma of desert poplar
10. Scientists capture redox moments in living cells
11. Scientists prove X-ray laser can solve protein structures from scratch
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Scientists stitch up photosynthetic megacomplex
(Date:9/18/2014)... novel robotic system that can operate inside the bore ... part of a biomedical research partnership program at Brigham ... determining if the robot, in conjunction with real-time MRI ... less costly, and less discomforting for the patient. The ... cancer therapies with greater precision. , Developed by a ...
(Date:9/18/2014)... acquire and creatively manipulate spoken language is unique to ... 6 million years of human evolution to make this ... candidate gene we now have," says Wolfgang Enard, Professor ... efforts to understand the molecular biological basis of language ... results of his latest study, undertaken in collaboration with ...
(Date:9/18/2014)... generally seem to be cheerful, happy-go-lucky characters, so you ... on life. , In fact some dogs are ... of Sydney shows. , "This research is exciting ... dogs objectively and non-invasively. It offers researchers and dog ... how that changes," said Dr Melissa Starling, from the ...
Breaking Biology News(10 mins):Trial begins for MRI-compatible robot designed to improve accuracy of prostate biopsies 2Trial begins for MRI-compatible robot designed to improve accuracy of prostate biopsies 3Trial begins for MRI-compatible robot designed to improve accuracy of prostate biopsies 4Trial begins for MRI-compatible robot designed to improve accuracy of prostate biopsies 5Language evolution: Quicker on the uptake 2Language evolution: Quicker on the uptake 3Dogs can be pessimists too 2Dogs can be pessimists too 3
... fossil fuel air pollution in the United States by ... , This novel way to measure carbon dioxide produced ... atmospheric scientists better understand where pollution is located and ... fossil-fuel-emitted carbon dioxide will be important as countries throughout ...
... used to help steady buildings against earthquakes, according to ... loose, sandy soil into rock. , When a major ... with disastrous consequences for buildings sitting on them. Currently, ... bind loose grains together. But these epoxy chemicals may ...
... Friedreich's ataxia is one of those diseases few have heard ... individual -- usually a child or teenager -- it is ... arms and legs, vision impairment and slurred speech, but eventually ... to heart failure later in life. There is no cure ...
Cached Biology News:Scientists map air pollution using corn grown in US fields 2Moonlighting enzyme linked to neurodegenerative disease 2Moonlighting enzyme linked to neurodegenerative disease 3
(Date:9/19/2014)... DUBLIN , September 19, 2014 ... Research and Markets ( http://www.researchandmarkets.com/research/b2jxhs/micro_market ) has announced the ... Pre-packed Chromatography Columns"  report to their offering.  ... columns market is one of the fastest-growing segments ... at $1.2 billion in 2013, and expected to ...
(Date:9/18/2014)... (PRWEB) September 18, 2014 Bipartisan passage ... a bill designed to stimulate development and commercialization of ... being praised by leaders of SPIE, the international ... Revitalizing American Manufacturing and Innovation (RAMI) Act, now moves ... authors have said they are optimistic that it will ...
(Date:9/18/2014)... 2014 /PRNewswire-iReach/ -- DeepResearchReports.com adds "2014 Deep Research ... and "2014 Deep Research Report on Global and ... database. Photo - http://photos.prnewswire.com/prnh/20140918/147058 ... Global and China Acetic Acid Industry" is a ... China and Global Acetic Acid Market. ...
(Date:9/18/2014)... 18, 2014 ... ) has announced the addition of ... Strategic Business Report" report to ... report analyzes the worldwide markets for ... the following Product Segments: Polymeric Materials, ...
Breaking Biology Technology:Micro Market Monitor : Global Pre-packed Chromatography Columns 2House passage of high-tech manufacturing bill is move toward stronger economy, say SPIE leaders 2House passage of high-tech manufacturing bill is move toward stronger economy, say SPIE leaders 3Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 2Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 3Acetic Acid Market & Sodium Stannate Industry (China, Global) Research Report 4Biocompatible Materials - Global Strategic Business Report 2014 2Biocompatible Materials - Global Strategic Business Report 2014 3
... At the Boston Atrial,Fibrillation Symposium, Stereotaxis, Inc. (Nasdaq: ... remote magnetic ablation that it believes will enhance ... Navigation,System. In booth #917, Stereotaxis will exhibit ... Cardiodrive(R) System for enhanced remote,catheter control and improved ...
... 14 In meetings held in association,with the JP ... (Nasdaq and MTA: CTIC) reviewed 2009 targeted milestones and ... approvals in 2009 in,addition to potential label expansion for ... Spectrum Pharmaceuticals, Inc.,(Spectrum) for Zevalin. , ...
... At the end of December,Trinitas Comprehensive Cancer Center ... state of New Jersey to offer cancer patients treatment ... VAR ).,RapidArc is a fast, precise form of ... is possible with conventional radiation therapy,technologies. By delivering ...
Cached Biology Technology:Stereotaxis Showcases Advancements for Remote Magnetic Ablations 2Stereotaxis Showcases Advancements for Remote Magnetic Ablations 3Stereotaxis Showcases Advancements for Remote Magnetic Ablations 4Cell Therapeutics Targeting Potential Zevalin Label Expansion, Pixantrone and OPAXIO Drug Approvals to Grow Commercial Operations and Revenues in 2009 2Cell Therapeutics Targeting Potential Zevalin Label Expansion, Pixantrone and OPAXIO Drug Approvals to Grow Commercial Operations and Revenues in 2009 3Cell Therapeutics Targeting Potential Zevalin Label Expansion, Pixantrone and OPAXIO Drug Approvals to Grow Commercial Operations and Revenues in 2009 4Cell Therapeutics Targeting Potential Zevalin Label Expansion, Pixantrone and OPAXIO Drug Approvals to Grow Commercial Operations and Revenues in 2009 5Cell Therapeutics Targeting Potential Zevalin Label Expansion, Pixantrone and OPAXIO Drug Approvals to Grow Commercial Operations and Revenues in 2009 6Trinitas Comprehensive Cancer Center Now Offering Cancer Patients Faster, Ultra-Precise Radiation Using New RapidArc Technology 2Trinitas Comprehensive Cancer Center Now Offering Cancer Patients Faster, Ultra-Precise Radiation Using New RapidArc Technology 3
... The SPD101B is a no-frills, basic SpeedVac ... Although economically priced, this unit still features ... a digitial display of time and heat. ... samples and accepts a wide variety of ...
... Jouan RC Maxi MB (for aqueous, other ... concentrator/centrifugal evaporator systems respond to specific applications ... and safe concentration of heat-labile samples. The ... different of cold traps and a wide ...
... Acid Resistant SpeedVac Model SPD131DDA , Our ... SPD131DDA is designed to handle the rigors and ... slim design, digital display, dual independent timers, an ... chamber and vapor pathway. , , Adjustable ...
...
Biology Products: