Navigation Links
Shedding New Light on Proteorhodopsin

New light has been shed on proteorhodopsin, the light-sensitive protein found in many marine bacteria. Researchers at the U.S. Department of Energy’s Lawrence// Berkeley National Laboratory (Berkeley Lab) and the University of California at Berkeley have demonstrated that when the ability to respire oxygen is impaired, bacterium equipped with proteorhodopsin will switch to solar power to carry out vital life processes.

“Our research shows that proteorhodopsin contributes to a bacterial cell’s energy balance only under certain environmental conditions, namely when the cell’s ability to respire has been impaired,” said Jan Liphardt, a biophysicist who holds a joint appointment as a Divisional Fellow in Berkeley Lab's Physical Biosciences Division (PBD) and the Physics Department of UC Berkeley (UCB).

“By harvesting light, proteorhodopsin enables bacterial cells to supplement respiration as a cellular energy source. This ability to withstand oxygen deprivation probably explains why so many ocean bacteria express proteorhodopsin.”

Liphardt said that the solar power option represents a potentially significant boost for efforts to develop alternatives to fossil fuel energy sources. Microbes that can simultaneously harvest energy from several different sources may be better at producing biofuels than microbes that can only utilize a single energy source.

The results of this study appear in a paper published by the Proceedings of the National Academy of Sciences (PNAS), entitled: Light-powering Escherichia coli with proteorhodopsin. Co-authoring the paper with Liphardt were UCB graduate students Jessica Walter and Derek Greenfield, and Carlos Bustamante, who also holds a joint Berkeley Lab-UCB appointment and is a Howard Hughes Medical Institute (HHMI) investigator.

There was a great deal of excitement in the biology community in 2000 when proteorhodopsin was first discovered encoded within the genomes of uncultivated ma rine bacteria. The discovery implied that such bacteria possessed phototrophic as well as respiratory capabilities. This would be a critical adaptation for seafaring microbes because the world’s oceans are permeated with “dead zones,” areas that lack sufficient oxygen to sustain life.

Source-Bio-Bio Technoloy
SRI
'"/>




Related medicine news :

1. Mice Aids in Shedding Light on Origin of Autism
2. Shedding Pounds from Diet or Exercise—Take Your Pic
3. Light therapy decreases depression during pregnancy
4. Light therapy devotes new hope in advanced lung cancer
5. Reducing TB With Ultraviolet Light
6. Exposure To Night Light may Increase The Risk Of Leukemia
7. Improving Lighting Could Bring About A Change In Alzheimers Patients
8. Light Cigarettes - Not So Light?
9. Fungal Infections Effectively Controlled By Light Therapy
10. Light can help fight gum bacteria
11. Lights can lighten your moods
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:2/13/2016)... Coral Springs, FL (PRWEB) , ... February 13, 2016 , ... ... on the environmental impact of American businesses. , The increasingly modern world of ... rely more often on non-renewable energy sources such as oil and coal, which pollutes ...
(Date:2/13/2016)... Canada (PRWEB) , ... February 13, 2016 , ... In ... foot forward. They’ll groom themselves to perfection, go out of their way to be ... date – just take a look at any online dating profile. , A ...
(Date:2/12/2016)... ... February 12, 2016 , ... The law firm of Morrow, ... Parishes. The purpose of these scholarships is to encourage applicants to pursue a ... seek employment within these two parishes. , “We have available jobs in St. ...
(Date:2/12/2016)... Falls Church, VA (PRWEB) , ... February 12, ... ... in Store?, Feb. 29, 2016 — 1:30 p.m. – 3:00 p.m. EST, ... burner issue in the life cycle of pharmaceutical products, garnering increased attention from ...
(Date:2/12/2016)... ... February 12, 2016 , ... T.E.N., a technology and information ... ISE Southeast Awards 2016. Finalists and winners of the ISE® Awards for both ... and Awards Gala on March 15, 2016 at the Westin Peachtree Plaza, Atlanta. ...
Breaking Medicine News(10 mins):
(Date:2/11/2016)... , Feb. 11, 2016 Potrero Medical, Inc., the ... to announce the appointment of George M. Rapier, III ... San Antonio, TX , WellMed is one of the ... patients and HMO members in Texas ... 1990 out of his own internal medicine practice, he has ...
(Date:2/11/2016)...  MiMedx Group, Inc. (NASDAQ: MDXG ), the ... other birth tissues, human skin and bone, and patent-protected ... products and therapies, announced today that it will present ... in New York , NY.  Parker ... Senken , Chief Financial Officer and Chris Cashman ...
(Date:2/11/2016)... , Feb. 11, 2016  AfterPill.com is reporting ... recommend alcohol abstinence for all women who are at ... the U.S. each year and raises the risks of ... --> According to the Guttmacher Institute, ... of women of child-bearing age, who have sex without ...
Breaking Medicine Technology: