Navigation Links
Scientists determine the structure of highly efficient light-harvesting molecules in green bacteria
Date:5/4/2009

omes. The pictures revealed that chlorophyll molecules inside chlorosomes have a nanotube shape. "They are like Russian dolls, with one concentric tube fitting inside the next," said Bryant. "The mutant bacterium's chlorosomes contain only one set of tubes, whereas the wild-type chlorosomes contain many tubes, each arranged in a unique pattern, like those andouille sausages."

The team then went a step further and used solid-state NMR spectroscopy -- a technique in which samples are spun very rapidly and exposed to a magnetic field -- to look deep inside the chlorosome. This technique enables researchers to understand the relationships between atomic nuclei in a sample and, ultimately, to acquire structural information about the molecules of interest.

"The NMR data revealed to us that the individual chlorophyll molecules in green bacteria are arranged in dimers -- molecules consisting of two identical simpler molecules -- with their long hydrophobic, or water-repellent, tails sticking out of either side," said Bryant. "We also learned precisely how the chlorophyll molecules attach to one another, and we were able to measure the distance between chlorophyll molecules. The cryo-electron microscopy pictures showed gross structural details and distances, and the NMR results allowed us to quantify these distances as well, and confirmed to us that what were were seeing was, in fact, stacks of the chlorophyll molecules all lined up," he said. The NMR results also enabled the scientists to determine that the chlorophyll molecules in green bacteria are arranged in helical spirals. In the mutant bacteria, the chlorophyll molecules are positioned at a nearly 90-degree angle in relation to the long axis of the nanotubes, whereas the angle is less steep in the wild-type organism. "It's the orientation of the chlorophyll molecules that is the most important thing here," said Bryant. The last steps for the team were to pull together all of their data and
'/>"/>

Contact: Barbara K. Kennedy
science@psu.edu
814-863-4682
Penn State
Source:Eurekalert  

Page: 1 2 3 4 5

Related biology technology :

1. Gladstone scientists uncover potential mechanism of memory loss in Alzheimers disease
2. Three Studies by Independent Scientists Highlighting Pressure Cycling Technology (PCT) to be Presented this Week at the British Mass Spectrometry Societys 29th Annual Meeting
3. Social Network for Scientists Marks Ten Years Online
4. Scientists synthesize memory in yeast cells
5. Scientists synthesize memory in yeast cells
6. University of Leicester scientists discover technique to help friendly bacteria
7. Scientists discover how cancer may take hold
8. Yale scientists make 2 giant steps in advancement of quantum computing
9. New Scientists Boost Disease-based Research at Boston Biomedical Research Institute
10. Scientists say sabercat bit like a pussycat
11. New Corporate Website Launched - Focus on Life Scientists, Flow Cytometrists, & Clinicians
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Scientists determine the structure of highly efficient light-harvesting molecules in green bacteria
(Date:11/21/2014)... (PRWEB) November 20, 2014 The November ... available as an open access journal featuring the following ... fluorescent proteins to preserve photoresponsiveness in the retina , ... fluorescent in situ hybridization using chromogenic substrates in zebrafish ... DNA, RNA, and protein electrophoresis , Nuclear ...
(Date:11/21/2014)... November 21, 2014 2014 Deep ... Industry” is a professional and in-depth research report ... ferrocyanide information, like its definition, classification, application, ... overview. This report covers the international market analysis, ... (such as the US, Europe, Asia, China, Japan ...
(Date:11/21/2014)... - Aequus Pharmaceuticals Inc. (the "Company" or "Aequus") ... a brokered private placement offering (the "Brokered Offering") ... Securities Inc. and Clarus Securities Inc. acted as ... syndicate of agents that also included Wolverton Securities ... Concurrently with the Brokered Offering, the Company also ...
(Date:11/18/2014)... Calif. , Nov. 18, 2014 Cord ... platinum sponsor of the 10th Annual World Stem Cell Summit, ... medicine stakeholders. The 2014 World Stem Cell Summit will be ... San Antonio, Texas . The ... and development of lifesaving cures and therapies, convening the most ...
Breaking Biology Technology:BioTechniques: The International Journal of Life Science Methods Announces the Publication of the November 2014 Issue—Available in Print and Online 2BioTechniques: The International Journal of Life Science Methods Announces the Publication of the November 2014 Issue—Available in Print and Online 3Sodium Ferrocyanide Market: Analysis for Global & China Regions Development Trends Available at DeepResearchReports.com 2Sodium Ferrocyanide Market: Analysis for Global & China Regions Development Trends Available at DeepResearchReports.com 3Aequus Pharmaceuticals closes $4.2 million private placement financing 2Aequus Pharmaceuticals closes $4.2 million private placement financing 3Cord Blood Registry Sponsors 2014 World Stem Cell Summit 2Cord Blood Registry Sponsors 2014 World Stem Cell Summit 3
... the potential to revolutionize the world of sensors: motion, ... micro scale down to the nano requires finding a ... gadgetry. In a paper appearing in ... Zhiping Xu of MIT,s Department of Civil and Environmental ...
... BASF filed a lawsuit in the United States District Court ... Pont de Nemours and Company) for infringement of BASF,s patented ... Specifically, DuPont,s Optimum GAT corn product incorporates BASF,s patented promoter ... toward an herbicide class known as AHAS or ALS inhibitors. ...
... to accelerate basic research and drive personalized medicine. , ... today announced that it has signed an agreement with ... Rosetta Biosoftware, a business unit of Rosetta Inpharmatics LLC, ... The deal allows Microsoft to incorporate genetic, genomic, metabolomic ...
Cached Biology Technology:Biomimetic-engineering design can replace spaghetti tangle of nanotubes in novel material 2BASF Sues DuPont for Patent Infringement 2Microsoft Signs Agreement With Merck & Co. Inc. to Acquire Assets of Rosetta Biosoftware, Strengthening Position in Life Sciences Industry 2Microsoft Signs Agreement With Merck & Co. Inc. to Acquire Assets of Rosetta Biosoftware, Strengthening Position in Life Sciences Industry 3
(Date:11/12/2014)... 2014 Crossmatch™, a leading provider of biometric ... fingerprint readers have been deployed throughout Montparnasse Pasteleria, ... Mexico . The bakery chain implemented the Crossmatch ... caused by employees clocking in for each other. ... Montparnasse relied on paper timecards and a mechanical time ...
(Date:11/7/2014)... BURBANK, Calif. , Nov. 7, 2014  In conjunction ... Burbank Police Departments, The Community Foundation of the ... BURBANK DNA JUSTICE PROJECT," a $250,000 initiative to ... successful initial phase. In its first six months of existence, ... desperately needed evidence support for local law enforcement. ...
(Date:11/6/2014)... PITTSBURGH--Speed is an asset for a predator. Except when that ... The tiger beetle, relative to its size, is the fastest ... 120 body lengths per second (at about five miles per ... To take the sprinting gold from the tiger beetle, a ... BUT! The tiger beetle has a problem. At peak speeds, ...
Breaking Biology News(10 mins):Montparnasse Pasteleria Achieves Time and Attendance Transparency with Crossmatch U.are.U Fingerprint Readers 2Community Foundation Of The Verdugos Unveils Campaign To Fund Glendale-Burbank DNA Justice Project 2The tiger beetle: Too fast to see 2
... Researchers at the University of Illinois at Chicago College ... on the nervous system to create the devastation of Huntington,s ... Nature Neuroscience online. The researchers were able to ... called JNK3, which is expressed only in neurons and, further, ...
... soil microbe that uses chemical warfare to fight off ... of its arsenal, researchers report, making use of an ... known to do: break a non-activated carbon-carbon bond in ... in the journal Nature , provides the first ...
... play a role in growth of some types of ... cancer development, say researchers from the Lombardi Comprehensive Cancer ... findings, presented at the annual meeting of the Endocrine ... this protein, known as Stat5a, may be different in ...
Cached Biology News:Huntington's disease deciphered 2Huntington's disease deciphered 3Researchers describe 'implausible' chemistry that produces herbicidal compound 2Dual role in breast tissue for a protein involved in leukemia 2