Navigation Links
Biological wires carry electricity thanks to special amino acids
Date:3/11/2013

Slender bacterial nanowires require certain key amino acids in order to conduct electricity, according to a study to be published in mBio, the online open-access journal of the American Society for Microbiology, on Tuesday, March 12.

In nature, the bacterium Geobacter sulfurreducens uses these nanowires, called pili, to transport electrons to remote iron particles or other microbes, but the benefits of these wires can also be harnessed by humans for use in fuel cells or bioelectronics. The study in mBio reveals that a core of aromatic amino acids are required to turn these hair-like appendages into functioning electron-carrying biological wires.

"It's the aromatic amino acids that make it a wire," says lead author Derek Lovley of the University of Massachusetts, Amherst. Lovley and his colleagues removed the pivotal amino acids from the pili and replaced them with smaller, non-aromatic amino acids. Without these key components, Lovley says, the pili are nothing more than protein strings. "We showed it's not good enough to just make the string - you've got to make a wire," says Lovley.

G. sulfurreducens "breathes" by removing electrons from organic materials and funneling them to iron oxides or to other microorganisms, much the way humans pull electrons out of organic molecules in food and dump them on oxygen. The bacteria use their pili to reach out to iron oxides or other microbes, transferring the "waste" electrons along the structure to the destination. Geobacter's pili are only 3-5 nanometers wide, but they can be 20 micrometers long, many times longer than the cell itself.

Trafficking in electrons is how all living things breathe, but it is normally carried out by discrete proteins or other molecules that act like containers for shuttling electrons from one place to another. Lovley says earlier results showed the pili in G. sulfurreducens possess metallic-like conductivity, th
'/>"/>

Contact: Jim Sliwa
jsliwa@asmusa.org
202-942-9297
American Society for Microbiology
Source:Eurekalert

Page: 1 2

Related biology news :

1. Wayne State University researchers techniques enable more, faster testing of biological liquids
2. Snooze button on biological clocks improves cell adaptability
3. Advance promises to expand biological control of crop pests
4. Visualizing biological networks in 4-D
5. Cornell engineers solve a biological mystery and boost artificial intelligence
6. The neurobiological consequence of predating or grazing
7. UTSA engineer Hai-Chao Han named Fellow of Medical and Biological Engineering Institute
8. A nanoscale window to the biological world
9. Synthetic and biological nanoparticles combined to produce new metamaterials
10. New book details the biological and cultural diversity of Khawa Karpo, sacred mountain of Tibet
11. Developing second skin military fabric to repel chemical and biological agents
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/10/2015)... , March 10, 2015  NXT-ID, Inc. (NASDAQ: ... the "Company"), a biometric authentication company focused on ... Wocket™ smart wallet has been named the "Number ... Modern. Rethink Modern ( http://www.rethinkmodern.com/ ) ... for your home and lifestyle that have a unique ...
(Date:3/3/2015)... LAKE FOREST, Calif. , March 3, ... ("Company"), the leading provider of advanced cryogenic ... serving markets including immunotherapies, stem cells, cell ... health, and reproductive medicine, today announced the ... Hutchinson Cancer Research Centers, ("Fred Hutch") ...
(Date:3/2/2015)... , March 2, 2015   Neurotechnology , ... today introduced the SentiGaze Software Development Kit ... create applications that use off-the-shelf webcams to track eye ... gazes at a monitor. Heatmaps can be used for ... effectiveness of online advertising. The SDK can also be ...
Breaking Biology News(10 mins):NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 2NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 3NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 4Cryoport, Inc. Expands Support of Fred Hutchinson Cancer Research Center's Clinical Research Division 2Cryoport, Inc. Expands Support of Fred Hutchinson Cancer Research Center's Clinical Research Division 3Neurotechnology Releases SentiGaze SDK for Eye Movement Tracking Using Ordinary Webcams 2Neurotechnology Releases SentiGaze SDK for Eye Movement Tracking Using Ordinary Webcams 3
... Professor Keon Jae Lee and Professor ... Science and Engineering at KAIST has developed the biotemplated ... Nature has its own capabilities to spontaneously ... as shells, sea sponges, and bone minerals. For instance, ...
... with a team of international biologists who have recently sequenced ... reveals dynamic evolution and adaptation in the snake venom system, ... between venomous snakes and their prey. A paper ... LSTM, and 34 co-authors from six countries, including the Director ...
... photography competition were announced at an awards ceremony in ... Laura Hepburn of the University of Southampton, details the ... when she first saw underwater hydrothermal vents blowing their ... underwater fissures that erupt volcanic gasses and boiling water. ...
Cached Biology News:LSTM researchers among first to sequence snake genome 2NERC announces the winner of its first photo and essay competition 2NERC announces the winner of its first photo and essay competition 3
(Date:3/26/2015)... "In America," the popular news television program that ... hosted by legendary film actor James Earl Jones, has announced ... upcoming segment. , Botany is commonly described as the ... quite a bit more complicated than that. Scientists and other ... organisms, from the smallest bacteria known to man to the ...
(Date:3/25/2015)... pharmaceutical market is one of the most ... its absolute size, plus a growing economy and increasing ... Business Monitor International. The Russian market is set to ... market, with growth estimates around 10-15% annually reaching an ... About Green Cross Green Cross provides ...
(Date:3/25/2015)... -- Optimal Research, LLC has been nominated as a ... Clinical Site or Trial Network". This is ... as a nominee in this ViE award category at ... in 2014. The ViE awards were created to honor ... contributions of companies and individuals in the vaccine industry. ...
(Date:3/25/2015)... Vernon Hills, IL (PRWEB) March 25, 2015 ... new Cole-Parmer® Symmetry® Top-Loading Balances and Analytical Balances ... savvy. The expanded line of weighing balances from ... PT Precision Toploading Balances increase your efficiency ... of a variety of samples. Weighing modes include ...
Breaking Biology Technology:Optimal Research Nominated 2015 Vaccine Industry Excellence (ViE) Award 2New Economical Top-Loading and Analytical Symmetry Balances from Cole-Parmer 2
... SEATTLE, Feb. 5 Cell Therapeutics (CTI),(Nasdaq and MTA: ... of,Series F Preferred Stock in exchange for 6,634 shares ... The exchange constitutes 83% in interest of all,series of ... Preferred,Stock will become convertible into 7,143 shares of CTI,s ...
... OREX ), a biopharmaceutical company focused on the treatment ... 11th Annual,BIO CEO & Investor Conference. The details are as follows: ... Monday, February 9, 2009, Time: 3:45 ... Astor Room, New York, Speaker: Graham Cooper, Chief ...
... MATEO, Calif., Feb. 4 NeurogesX, Inc. (Nasdaq: ... and commercializing novel pain management therapies, announced today that ... to present at the 11th Annual BIO CEO & ... 10, 2009. Mr. DiTonno and Stephen Ghiglieri, Chief Financial ...
Cached Biology Technology:Cell Therapeutics Exchanges 83% of Remaining Convertible Preferred Stock Into New Non-dividend Bearing, Non-redeemable Convertible Preferred Stock With Conversion Price of $0.14 per Share 2NeurogesX to Present at 11th Annual BIO CEO & Investor Conference 2NeurogesX to Present at 11th Annual BIO CEO & Investor Conference 3
... 5-OxoETE-d7 is used as an internal ... stable isotope dilution mass spectrometry. 5-OxoETE is ... oxidation of 5-HETE in human neutrophils. It ... an EC50 of 2 nM. 5-OxoETE selectively ...
...
... internal standard for the quantification of 5-OxoETE ... is a polyunsaturated keto acid formed by ... It stimulates cytosolic calcium levels in neutrophils ... selectively stimulates the migration and degranulation of ...
... to Over 3 Million Genotypes Per Day ... of performing 4,600 to over 3 Million ... family of products*, this automated, scalable, multiplexed ... in each well of an arrayed 384-well ...
Biology Products: