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

Researchers at Washington University in St. Louis have figured out the orientation of a protein in the antenna complex to its neighboring membrane in a photosynthetic bacterium, a key find in the process of energy transfer in photosynthesis.

Robert Blankenship, Ph.D., Markey Distinguished Professor of biology and chemistry in Arts & Sciences, led a team that for the first time combined chemical labeling with mass spectroscopy to verify the orientation. The team also included Michael Gross, Ph.D., Washington University professor of chemistry, immunology and medicine, and chemistry graduate students Jianzhong Wen and Hao Zhang. A paper describing this work appeared recently in the Proceedings of the National Academy of Sciences USA.

In green sulfur bacteria, which live in extremely dim environments with scarce visible light, the membrane-attached Fenna-Matthews-Olson (FMO) antenna protein serves as a sort of wire connecting the large peripheral chlorosome antenna complex with the organism's reaction center. These bacteria are related to extreme heat-loving bacteria that live at thermal vents on the ocean floor. Their antenna systems are much larger and more pronounced than those of other bacteria to take advantage of whatever geothermal light they can harvest.

Blankenship fondly refers to the FMO protein as the taco shell protein because of its structure: its ribbon-like backbone wraps around three clusters of seven chlorophylls, just like a taco shell around ground beef. The structure also is referred to as trimeric because of the three clusters.

The taco shell is a sort of "middleman" in the antenna system, sandwiched in between a larger antenna and a complex called the reaction center, where all the electron transfer chemistry takes place. Most of the absorption of light is carried out by a complex called the chlorosome that then transfers the energy to the trimeric protein that in turn transfers to the reaction c
'/>"/>

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:8/19/2014)... From this week,s Eos: Long-Term Ecological Research and Network-Level ... track how a wide range of ecosystems was responding ... would be particularly powerful if it coupled multiple decades ... large-scale, long-term experiments and models from dozens of different ... It is the Long-Term Ecological Research (LTER) Network, which ...
(Date:8/19/2014)... the world, leprosy and tuberculosis live side-by-side. Worldwide ... per year, with nearly all of them occurring ... vaccine Bacille Calmette-Guerin, or BCG, provides only partial ... more potent vaccine is needed to combat both ... weapon against both diseases., In a study published ...
(Date:8/19/2014)... CAMBRIDGE, MA -- MIT chemical engineers have devised a ... that are released slowly over a few weeks. When ... induces the body to rapidly form new bone that ... This type of coated scaffold could offer a dramatic ... which involves transplanting bone from another part of the ...
Breaking Biology News(10 mins):This week from AGU: Long-term ecological research, predicting cholera outbreaks 2New vaccine shows promise as stronger weapon against both tuberculosis and leprosy 2Engineering new bone growth 2Engineering new bone growth 3
... A new study published this week in the journal ... mixing of cold, deep waters from below can change sea ... occurs in a huge region of the ocean that takes ... climate patterns, particularly global warming. Using a new measurement ...
... cell found in the trillions in our brain have made ... injury and disease such as stroke. A University of Bristol ... how astrocyte cells respond to neurological trauma. The star-shaped ... glial cell that comprise one of two main categories of ...
... research team from the School of Basic Medical ... Radix Achyranthis Bidentatae can inhibit advanced glycation end ... cortex, and improve learning and memory capabilities in ... on advanced glycation end product accumulation is associated ...
Cached Biology News:Study explains Pacific equatorial cold water region 2Study explains Pacific equatorial cold water region 3Key target responsible for triggering detrimental effects in brain trauma identified 2
(Date:8/19/2014)... AZ (PRWEB) August 19, 2014 Sales ... launch of its online sales skills training course ... sales skills. , MedTech clinical staff spend the majority ... a hospital, standalone medical center, or physician practice – ... staff. But why stop there? Sales Horizons believes clinical ...
(Date:8/18/2014)... Aug. 18, 2014 BioElectronics Corporation ... consumer medical devices said that its EVP ... by CEOLIVE.TV as part of its Executive ... is available at http://ceolive.tv/bioelectronics-corp-otc-biel/biel-videos/2282-ceolive-tv-interview-bioelectronics-corp-otcqb-biel ... to investors the unique advantages of BioElectronics ...
(Date:8/18/2014)... , August 18, 2014 ... Transparency Market Research "Life Science Reagents Market(Products- PCR ... Electrophoresis, Chromatography, In-Vitro Diagnostic Reagents and Others; End ... Institutions, Clinical Laboratories, and Forensic Laboratories)- Global Industry ... - 2019", the global life science reagents market ...
(Date:8/18/2014)... Toronto, Canada (PRWEB) August 18, 2014 ... land of opportunity for the clinical research industry. ... clinical trials due to its aging population; a ... in chronic diseases; a densely populated pool of ... enrolment. , Notwithstanding these positive points, China also ...
Breaking Biology Technology:Sales Horizons Launches a New Online Sales Training Course for MedTech Clinical Staff to Develop Their Sales Skills 2Sales Horizons Launches a New Online Sales Training Course for MedTech Clinical Staff to Develop Their Sales Skills 3BioElectronics EVP Dr. Deepak Kotak Interviewed on CEO Live 2BioElectronics EVP Dr. Deepak Kotak Interviewed on CEO Live 3Global Life Science Reagents Market Expected to Reach USD 25.7 Billion in 2019: Transparency Market Research 2Global Life Science Reagents Market Expected to Reach USD 25.7 Billion in 2019: Transparency Market Research 3Global Life Science Reagents Market Expected to Reach USD 25.7 Billion in 2019: Transparency Market Research 4Global Life Science Reagents Market Expected to Reach USD 25.7 Billion in 2019: Transparency Market Research 5China – Land of Opportunities & Challenges for the Clinical Research Industry, New Webinar Hosted by Xtalks 2
... a serine/threonine phosphatase isolated from human red ... heterodimer of 60kDa (A) and 36kDa (C) ... the a-subunit of phosphorylase kinase. With its ... specificity and may play a regulatory role ...
... Monitoring Kit measures adenosine triphosphate ... and a dynamic range. Based ... assay measures ATP in bacterial, ... a concentration range of 10-11 ...
... Jouan RCT series of refrigerated cold traps ... trapping of low volatility/aqueous solvents or high ... and other vacuum concentrators/centrifugal evaporators. Also used ... systems such as used in electron microscopes. ...
96 Well Plate Sterile, RE bottom; consistent medium binding affinity for hydrophobic complexes and proteins....
Biology Products: