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:2/6/2016)... ... February 06, 2016 , ... ... , MEDIA ADVISORY: 5000 PERIOPERATIVE NURSES EXPECTED AT AORN SURGICAL CONFERENCE & ... nurses in the world with an estimated 5000 perioperative nurses in attendance ...
(Date:2/5/2016)... SARASOTA, Florida (PRWEB) , ... February 05, 2016 , ... ... an event he has completed every year since it started in 2003. This year, ... attracting the attention of fellow runners and NBA team the Miami Heat. , This ...
(Date:2/5/2016)... Minneapolis, MN (PRWEB) , ... February 05, 2016 , ... ... p.m. at the Day Block Event Center in Minneapolis, Minn. Triumph Over Parkinson’s will ... , Larry Schneiderman, owner of Schneiderman’s Furniture, lives with Parkinson’s disease and is the ...
(Date:2/5/2016)... ... 05, 2016 , ... After years as an active staff surgeon and having ... surgeon Dr. Wayne Carman transitioned to chief of the Division of Plastic Surgery at ... term as chief and began a second three-year term in January of 2016. , ...
(Date:2/5/2016)... ... , ... Regular gym users know the routine: each January, they see a ... treadmills. It’s a predictable trend. After the excesses of November and December, people make ... joining gyms, starting new walking or running routines, or signing up for Zumba. And ...
Breaking Medicine News(10 mins):
(Date:2/5/2016)... York , February 5, 2016 ... Transparency Market Research report states that the global active ... 2014 and is predicted to reach US$185.9 bn by ... of 6.50% from 2014 to 2020. The title of ... Chemical/Biological, Captive/Contract Manufactured, by Geography, and by Therapeutic Area) ...
(Date:2/5/2016)... MELVILLE, N.Y. , Feb. 5, 2016  Henry ... of health care products and services to office-based dental, ... has entered into an agreement to acquire a majority ... dental supplies and equipment in Brazil ... Headquartered in Blumenau, Brazil, Dental Cremer is the dental ...
(Date:2/4/2016)... , Feb. 4, 2016 For hospitals considering ... those already participating in the program, the Health Resources ... to as the , Mega-Guidance , could have significant ... is published in September 2016. Essential Insights ... Service Marketing , summarizes the Mega-Guidance,s key proposed changes, ...
Breaking Medicine Technology: