Navigation Links
Orientation of antenna protein in photosynthetic bacteria described
Date:4/2/2009

enter.

Photosynthesis transforms light, carbon dioxide and water into chemical energy in plants and some bacteria. The wavelike characteristic of this energy transfer process can explain its extreme efficiency, in that vast areas of phase space can be sampled effectively to find the most efficient path for energy transfer. "We used a combination of tried and true methods, but two that hadn't been used together in the past," said Blankenship. "The surface of the protein has various amino acid residues, and some of those are reactive to the chemical probe we added into the system. The surface residues that react to the probe are then labeled, and we isolate the protein and characterize where the label is in the protein by using mass spectroscopy. That's a kind of footprinting analysis.'

This allowed the researchers to determine how the protein is oriented on the membrane. The footprinting revealed that the energy will flow from the outer part of the antenna, through the mid-part and into the membrane where the reaction center is located.

"The bacteria use the energy of the pigments as a kind of ladder," he said. "As it goes on this ladder, it goes to lower and lower energy states and is guided down to the lowest energy state. That's the funneling effect the physical guiding of the energy to the reaction center. By knowing exactly how this orientation is on the membrane, we determined the funneling property in a more precise ways."

The biochemical aspects of the project were done in the Blankenship lab, while the mass spectrometry analysis was done in the Washington University NIH Mass Spectrometry Resource Facility that is directed by Gross.

The trimeric protein the taco shell protein has a symmetry axis down the middle. The protein lays on the membrane with the symmetry axis perpendicular to the membrane. The combination of labeling and mass spectroscopy enabled the researchers to determine which side of the p
'/>"/>

Contact: Robert Blankenship
blankenship@wustl.edu
314-935-7971
Washington University in St. Louis
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Is political orientation transmitted genetically?
2. Scientists alter sexual orientation in worms
3. UC Davis researchers identify a protein that may help breast cancer spread, beat cancer drugs
4. New high-throughput screening technique makes probing puzzling proteins possible
5. Scripps scientists find structure of a protein that makes cancer cells resistant to chemotherapy
6. Protein is key to embryonic stem cell differentiation
7. Scripps research scientists watch as individual alpha-synuclein proteins change shape
8. Study of protein structures reveals key events in evolutionary history
9. Pitt researchers describe molecular 2-step leading to protein clumps of Huntingtons disease
10. Protein structure determined in living cells
11. Protein function and chromatin structure methods featured in Cold Spring Harbor Protocols
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/7/2015)... Calif. , July 7, 2015  Based ... market, Frost & Sullivan recognizes Credence ID, LLC ... Entrepreneurial Company of the Year Award. Credence ... to aid in its mission of offering enrollment ... populations globally. As Credence ID was formed by ...
(Date:7/2/2015)... DUBLIN , June 25, 2015 ... has announced the addition of the "Natural ... Hybrid), Technologies (Recognition, IVR, OCR, Pattern & Image ... to their offering. The key vendors ... Google, HP, IBM Corporation, Microsoft Corporation, NetBase Solutions, ...
(Date:7/2/2015)... GOTHENBURG, Sweden , July 2, 2015 ... fingerprint sensors FPC1025, FPC1035, FPC1145 and FPC1155 from the distributor ... is one of FPC,s distributors in Asia ... Q4 2015. The sensors will be used by smartphone manufacturers ... 268 MSEK is included in the communicated revenue guidance of ...
Breaking Biology News(10 mins):Frost & Sullivan Acknowledges the Distinctive Customer-focused Attributes of Credence ID's Mobile Biometric Product Suite 2Frost & Sullivan Acknowledges the Distinctive Customer-focused Attributes of Credence ID's Mobile Biometric Product Suite 3Frost & Sullivan Acknowledges the Distinctive Customer-focused Attributes of Credence ID's Mobile Biometric Product Suite 4Frost & Sullivan Acknowledges the Distinctive Customer-focused Attributes of Credence ID's Mobile Biometric Product Suite 5Natural Language Processing Market by Type (Rule-Based, Statistical, and Hybrid), Technologies (Recognition, IVR, OCR, Pattern & Image Recognition) - Worldwide Forecast to 2020 2FPC Receives Order for Touch Fingerprint Sensors of 268 MSEK 2
... long been considered a major risk factor for cardiovascular ... risk, but the mechanisms of how arteries stave off ... the Perelman School of Medicine, University of Pennsylvania, Wistar ... that the protein apolipoprotein E (apoE) plays a major ...
... the Nowgen Schools Genomics Programme website launches with a range ... genetics in schools and colleges. , Developments in genetics research ... at a cost of $3 billion to sequencing a genome ... genetics in classroom education have remained relatively static. The pace ...
... Research led by Chu Chen, PhD, Associate Professor of Neuroscience ... enzyme called Monoacylglycerol lipase (MAGL) as a new therapeutic target ... online November 1, 2012 in the Online Now section of ... that inactivation of MAGL, best known for its role in ...
Cached Biology News:Softening arteries, protecting the heart 2Softening arteries, protecting the heart 3Bridging the gap between genomics and education 2LSUHSC research identifies new therapeutic target for Alzheimer's disease 2
(Date:7/31/2015)... , ... July 31, 2015 , ... ... competitive market analysis and premium industry insights on the global resorcinol industry. The ... a collective study of vivid market scenarios and analysis of primary and secondary ...
(Date:7/30/2015)... July 30, 2015 AACC welcomed thousands ... 2015 AACC Annual Meeting & Clinical Lab Expo ... 26–30. The meeting showcased revolutionary advancements in clinical ... of healthcare providers to diagnose patients quickly and ... treatment. As of Wednesday, July ...
(Date:7/30/2015)... 2015 According to a new ... Modeling, PB/PK, PKPD, Trial Design, Toxicity Prediction, In-house, Contract ... Trial), by End Users - Global Forecast to 2020", ... reach USD 2,107.99 million by 2020 from USD 1,034.93 ... Browse more than 75 ...
(Date:7/30/2015)... customers across the globe, ISN improves the efficiency and effectiveness of contractor management systems. ... and reliable contractors in over 80 countries. ... ... Over 60,000 Worldwide Customers In More Than 80 Countries ... Headquartered in Dallas, TX , ISN has additional offices in ...
Breaking Biology Technology:Resorcinol Market to Grow at 6% CAGR to 2019 Says New Research Report at ReportsnReports.com 2Resorcinol Market to Grow at 6% CAGR to 2019 Says New Research Report at ReportsnReports.com 3Resorcinol Market to Grow at 6% CAGR to 2019 Says New Research Report at ReportsnReports.com 4Innovative Research on Cancer, Heart Disease, and Infectious Diseases Draws More than 17,500 Attendees to 2015 AACC Annual Meeting 2Innovative Research on Cancer, Heart Disease, and Infectious Diseases Draws More than 17,500 Attendees to 2015 AACC Annual Meeting 3Innovative Research on Cancer, Heart Disease, and Infectious Diseases Draws More than 17,500 Attendees to 2015 AACC Annual Meeting 4Biosimulation Market Worth 2,107.99 Million USD by 2020 2Biosimulation Market Worth 2,107.99 Million USD by 2020 3Biosimulation Market Worth 2,107.99 Million USD by 2020 4ISN Reaches Over 60,000 Worldwide Customers 2ISN Reaches Over 60,000 Worldwide Customers 3
... Group,Inc. (Nasdaq: NYER ) reported results for the fiscal ... June 30, 2008 increased $6.6,million or 10.2% to $71.2 million ... loss for the fiscal year ended June 30, 2008 was,$403,520 ... of $86,446 or $.02,per share for the previous fiscal year., ...
... ACEL ) today reported its financial results for ... The company recorded a net loss of approximately ... for the fourth fiscal quarter ended,July 31, compared to ... per,basic and diluted common share, for the fourth quarter ...
... HARBIN, China, Oct. 14 /Xinhua-PRNewswire-FirstCall/ -- China Sky ... Company") (NASDAQ: CSKI ), a,leading fully integrated ... of China ("PRC"), announced today that it,started production ... a,pharmaceutical company that it acquired, on October 14, ...
Cached Biology Technology:Nyer Medical Group, Inc. Reports Revenues of $71.2 Million With Net Loss of $.10 Per Share for Fiscal Year 2008 2Nyer Medical Group, Inc. Reports Revenues of $71.2 Million With Net Loss of $.10 Per Share for Fiscal Year 2008 3Alfacell Reports Fiscal Fourth Quarter and Full Year 2008 Financial Results 2Alfacell Reports Fiscal Fourth Quarter and Full Year 2008 Financial Results 3Alfacell Reports Fiscal Fourth Quarter and Full Year 2008 Financial Results 4Alfacell Reports Fiscal Fourth Quarter and Full Year 2008 Financial Results 5China Sky One Medical, Inc. Starts Production at Newly Acquired Facility and Reaffirms Guidance 2China Sky One Medical, Inc. Starts Production at Newly Acquired Facility and Reaffirms Guidance 3
... silencing experiments often call for critical, ... Transfection Agent refines siRNA transfection protocols ... lipid-based formulation can be used to ... are subcultured without increased cytotoxicity. ...
... The CHEMICON® CaspaTag™ Pan-Caspase In Situ ... detection of active caspases in cells undergoing ... only. Not for use in diagnostic or ... Assay Kits use a novel approach to ...
... INTERFERin is a new-generation siRNA transfection ... efficiency at 1 nM siRNA in a ... with excellent cell viability. Using low siRNA ... effects observed when transfecting siRNA at higher ...
... Cell and Tissue Staining Kits are intended ... range of histological and cytological specimens. These ... antibodies manufactured by either R&D Systems or ... on the formation of the Avidin-Biotin Complex ...
Biology Products: