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

tle andouille sausages. When you take cross-sections of andouille sausages, you see different patterns of meat and fat; no two sausages are alike in size or content, although there is some structure inside, nevertheless. Chlorosomes in green bacteria are like andouille sausages, and the variability in their compositions had prevented scientists from using X-ray crystallography to characterize the internal structure."

To get around this problem, the team used a combination of techniques to study the chlorosome. They used genetic techniques to create a mutant bacterium with a more regular internal structure, cryo-electron microscopy to identify the larger distance constraints for the chlorosome, solid-state nuclear magnetic resonance (NMR) spectroscopy to determine the structure of the chlorosome's component chlorophyll molecules, and modeling to bring together all of the pieces and create a final picture of the chlorosome.

First, the team created a mutant bacterium in order to determine why the chlorophyll molecules in green bacteria became increasingly complex over evolutionary time. To create the mutant, they inactivated three genes that green bacteria acquired late in their evolution. The team suspected that the genes were responsible for improving the bacteria's light-harvesting capabilities. "Essentially, we went backward in evolutionary time to an intermediate state in order to understand, in part, why green bacteria acquired these genes," Bryant said. The team found that the more evolved, wild-type bacteria grow faster at all light intensities than the mutant form. "Indeed, the reason that chlorophylls became more complex was to increase light-harvesting efficiency," said Bryant.

Next, the team isolated chlorosomes from the mutant and the wild-type forms of the bacteria and used cryo-electron microscopy -- a type of electron microscopy that is performed at super-cold cryogenic temperatures -- to take pictures of the chloros
'/>"/>

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:4/29/2015)... According to a new market research ... & Non-Portable), Component (Accelerometer, Proximity Probe, & Others), ... Mining, & Others), & Geography - Global Forecast ... reach $1,453.76 Million by 2020, at a CAGR ... and 92 figures spread through 205 pages and ...
(Date:4/29/2015)... GUELPH, ON , April 29, 2015 /PRNewswire/ - BIOREM Inc. (TSX-V: BRM) ... twelve-month periods ended December 31, 2014. Biorem,s complete fiscal 2014 year-end financial ... FINANCIAL HIGHLIGHTS: 2014 , 2013 , 2014 ... 10,683 , 19,596 Gross profit 1,326 , ... 1,191 , 1,493 , 3,377 , ...
(Date:4/29/2015)... EAST RUTHERFORD, N.J. , April 29, 2015 ... 2015 financial results will be released on Friday, May 1, ... The Company will host a conference ... Conference Call When: , Friday, ... Dial-in: , 1-888-468-2440 for U.S.1-719-325-2454 for International ...
(Date:4/29/2015)... (PRWEB) April 29, 2015 The leading ... announce that its regenerative stem cell therapy has processed ... 2002, seeking to discover a successful treatment for horses ... In 2003 VetStem signed a worldwide exclusive license for ... and the first horse was treated in January 2004. ...
Breaking Biology Technology:Vibration Monitoring Equipment (Portable & Non-Portable) Market worth $1,453.76 Million by 2020 - New Report by MarketsandMarkets 2Vibration Monitoring Equipment (Portable & Non-Portable) Market worth $1,453.76 Million by 2020 - New Report by MarketsandMarkets 3Vibration Monitoring Equipment (Portable & Non-Portable) Market worth $1,453.76 Million by 2020 - New Report by MarketsandMarkets 4Biorem Reports Results for Fourth Quarter 2014 and Year Ended December 31, 2014 2Biorem Reports Results for Fourth Quarter 2014 and Year Ended December 31, 2014 3Biorem Reports Results for Fourth Quarter 2014 and Year Ended December 31, 2014 4VetStem Biopharma -Regenerative Cell Therapy has processed over 11,000 samples 2
... applications for the real world, has formalized ... Inc. One of the many businesses that ... Tier 1 automotive supplier focusing on technology-rich ... and Lumidigm will bring patented biometric functionality ...
... N.J., Aug. 5 Ortho Biotech is announcing,that it is voluntarily ... cracks in the necks of a,small number of vials upon post-manufacturing ... Approximately 44,292 vials of lot,P114942A in the following packaging configurations were ... NDC ...
... Replidyne, Inc.,(Nasdaq: RDYN ) today announced its financial ... 2008., Replidyne reported a net loss of $18.7 million ... per basic and diluted common share of $0.69,per share, compared ... share or $1.65 per common share on a fully diluted ...
Cached Biology Technology: Lumidigm Signs Strategic Agreement with Methode Electronics : Automotive Supplier Invests in Biometric Component Development 2Ortho Biotech Announces Nationwide Voluntary Recall of Procrit(R) (Epoetin Alfa) Lot Number P114942A 2Replidyne Announces Second Quarter 2008 Results From Operations 2Replidyne Announces Second Quarter 2008 Results From Operations 3Replidyne Announces Second Quarter 2008 Results From Operations 4Replidyne Announces Second Quarter 2008 Results From Operations 5Replidyne Announces Second Quarter 2008 Results From Operations 6Replidyne Announces Second Quarter 2008 Results From Operations 7
(Date:4/2/2015)... April 2, 2015 According to ... attributed to somewhat higher than 125 MSEK. This exceeds ... report 2014 that revenues for Q1 2015 would be ... reported for Q4 2014. The operating result for the ... The complete interim report will as previously communicated be ...
(Date:4/1/2015)... BOSTON , April 1, 2015   Medisafe ... 1.5 million users across iOS and ... has begun integrating biofeedback into the platform to allow ... health outcomes. For the first time, patients will be ... missing a dose impacts important biometrics, such as glucose ...
(Date:3/30/2015)... , Mar. 26, 2015 Research and Markets ... of the "Global Gesture Recognition Market in Automotive ... The analysts forecast the Global Gesture Recognition market in ... over the period 2013-2018. Gesture recognition is ... to different gestures of an individual. Gesture recognition technology ...
Breaking Biology News(10 mins):Fingerprint Cards Revises Revenues for Q1 2015 2Medisafe Announces Launch of Biometric Integration, Enabling Patients to Stay Adherent to Their Meds and See Tangible Health Results 2Global Gesture Recognition Market in Automotive Sector Report 2015 - Growing Number of Partnerships 2
... American Pregnancy Association, six million women a year deal with ... hope to women who want to conceive ― in the ... shelves right now. Prof. Adrian Shulman of Tel Aviv ... has found a statistical connection between the over-the-counter vitamin supplement ...
... at the Living Planet Symposium have been hearing about ... almost three months, the satellite is in excellent health ... presented at the symposium. Prof. Duncan Wingham, Lead ... in very good shape exceeding in-orbit specifications, the ...
... study of the occurrence of fishes in the ocean,s deepest ... species of fishes are more numerous at such depths than ... published in the July/August issue of BioScience , observed ... meters around a baited video lander in the Japan Trench. ...
Cached Biology News:Increasing fertility threefold 2CryoSat-2 exceeding expectations 2Study suggests more fish than thought may thrive in the ocean's depths 2
...
Use as the souce of CETP enzyme for screening CETP inhibitors. Use in conjunction with the CETP activity assay kit (K601-100)....
For mRNA Differential Display with three one-base anchored oligo-dT primers and rationally designed arbitrary 13mers. These kits feature the latest generation of isotopic mRNA Differential Display t...
22 x 50 mm; No. 1 thickness range: 0.13 to 0.17 mm, suitable for work in histology, cytology, urinalysis and microbiology, precleaned, store at room temperature ...
Biology Products: