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:4/28/2017)... ... April 28, 2017 , ... It's not always common knowledge whether ... illnesses that are unclear as to whether or not they are contagious, and most ... of these illnesses. So, FindaTopDoc took a look into the matter. , They ...
(Date:4/28/2017)... ... April 28, 2017 , ... Getting enough sleep affects much more than energy – it ... 19 hours without sleep can compromise motor reaction time, which can increase the risk of ... is sharing the following tips from the NSF to help you sleep better and feel ...
(Date:4/28/2017)... VA (PRWEB) , ... April 28, 2017 , ... The ... volunteer board members and officers for 2017-2018. The annual board election process has been ... on a volunteer basis. , Thomas C. Dickerson, Ed.D., FACHE, succeeds Jim Hamilton, MHA, ...
(Date:4/28/2017)... National Harbor, Md. (PRWEB) , ... April 28, ... ... Urgent Care Association of America (UCAOA) and College of Urgent Care Medicine will ... Momentum 2017 workshops, sessions and speakers will help those in the industry adapt ...
(Date:4/28/2017)... ... April 28, 2017 , ... Yisrayl Hawkins, Pastor and Overseer at The House of ... the Creator responds to and which He does not. Yisrayl says with so many ... is the true name, but he says with a little Scripture, backed with a lot ...
Breaking Medicine News(10 mins):
(Date:4/19/2017)... N.J. , April 19, 2017  Novartis ... by the National Heart, Lung, and Blood Institute ... demonstrating that 58% of patients with treatment-naïve severe ... months when treated with eltrombopag at the initiation ... . The study evaluated three sequential treatment groups, ...
(Date:4/18/2017)... 2017 Cogentix Medical, Inc. (NASDAQ: CGNT), a ... Uro/Gyn and Gynecology markets with innovative and proprietary products, ... March 31, 2017 after the market close on Tuesday, ... host a conference call and webcast to discuss its ... 2017 at 4:30 p.m. Eastern Time (3:30 p.m. Central ...
(Date:4/18/2017)... 2017  Astute Medical, Inc., developer of biomarkers for ... presented at the 2017 National Kidney Foundation (NKF) ... through April 22. Physicians will present data on two ... risk for acute kidney injury (AKI) during the management ... Elevated levels of TIMP-2 and IGFBP-7 have ...
Breaking Medicine Technology: