Navigation Links
Bacteria beat the heat

How do some microorganisms manage to exist and even thrive in surroundings ranging from Antarctica to boiling hot springs? A team of scientists from the Weizmann Institute's Plant Sciences Department, led by Prof. Avigdor Scherz, has found that a switch in just two amino acids (the building blocks of protein) can make a difference between functioning best at moderate temperatures and being adapted to living in extreme heat. The results of their research, which recently appeared in Nature, might have implications for future attempts to adjust crops to differing climate conditions or improve enzyme efficiency in industrial processes.

The team compared two different kinds of bacteria ?one found in moderate environments and the other, an intense-heat lover. Both were photosynthetic (that is, using the sun's energy to create sugars for food). The focus of the research was a reaction that takes place in enzymes in the photosynthetic "reaction center" of the bacterial cell. While gradually raising the surrounding temperature, the scientists timed this reaction to see how reaction rates changed as things heated up.

A general rule for enzyme reactions states that as the heat rises, so does the reaction rate. Contrary to this rule, and the scientist's expectations, both reaction rates peaked at a certain point, and remained steady thereafter. For each enzyme, the peak occurred in the bacteria's "comfort zone." Further comparisons of the enzymes, which were nearly identical, turned up differences in just two of the hundreds of amino acids making up the enzyme sequence. When the scientists replaced these two amino acids in the enzyme adapted to the moderate temperatures with those of the heat-loving enzyme, they observed an increase of about 10 degrees in the average temperature at which the reaction rate peaked. Scherz: "This study shows that enzyme efficiency is tuned to the average temperature of the bacterial habitat, rather than the immediate conditions.
'"/>

Source:American Committee for the Weizmann Institute of Science


Page: 1 2

Related biology news :

1. Bacteria collection sheds light on urinary tract infections
2. Solution to Pollution: New Bacteria Eats Toxic Waste
3. The Bacterias guide to survival
4. UF Researchers Map Bacterial Proteins That Cause Tooth Loss
5. Bacterial genome sheds light on synthesizing cancer-fighting compounds
6. Where Bacteria Get Their Genes
7. Bacteria feed on smelly breath (and feet)
8. New insight into autoimmune disease: Bacterial infections promote recognition of self-glycolipids
9. Bacteria use hosts immune response to their competitive advantage
10. Say what? Bacterial conversation stoppers
11. Bacteria are key to green plastics, drugs
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Bacteria beat the heat

(Date:5/18/2015)... , May 18, 2015 Fingerprint ... sensors FPC1020, FPC1025, FPC1145, FPC1155 and FPC1035 from one if ... June until and including Q3 2015 and the sensors will ... . Communicated order values for 2015 hereby amount to 740 ... Q1 2015 of 140 MSEK and a number of smaller ...
(Date:5/14/2015)... , May 14, 2015  Verificient Technologies, ... verification and online remote proctoring, announced a ... (SaaS) company and creator of the Canvas ... the two companies will benefit from the ... As a fully integrated multifactor ...
(Date:5/11/2015)...  Through a well-rounded UAS delegation representing private industry, government, ... showing at AUVSI,s Unmanned 2015 conference last week in ... UAS industry met with over 200 hundred people ... the UAS ecosystem. "Our message is clear ... Aerospace Rich Knoll . "If you want to fly ...
Breaking Biology News(10 mins):Fingerprint Cards Receives Touch Fingerprint Sensor Order of SEK 230 Million and Raises Revenue Guidance for 2015 2Verificient and Instructure Announce Alliance Partnership to Provide Online Proctoring for K-12 and Higher Education Institutions 2Ohio Flies High at Unmanned '15, Sets Stage for Ohio UAS Conference 2
... group of more than 30 researchers today gave a score ... of the world,s oceans, which showed the United States as ... recreation as leading concerns. The analysis, published in the ... scale in 10 separate categories such as clean water, biodiversity, ...
... DNA sequencing is rapidly getting faster and cheaper, ... be able to use this information. In a contest ... the world are vying to interpret the DNA sequences ... a mystery—with the goal of establishing "best practices" for ...
... Research Careers) Program has announced the travel award recipients ... from August 24-25, 2012. These awards are meant ... and scientists into the mainstream of the basic science ... and new assistant professors. This year MARC conferred 15 ...
Cached Biology News:Rating of ocean health shows 'room for improvement' 2Thirty teams compete to interpret three families' genomes 2Thirty teams compete to interpret three families' genomes 3Thirty teams compete to interpret three families' genomes 4Thirty teams compete to interpret three families' genomes 5
(Date:6/2/2015)... June 02, 2015 Cirrascale ... blade-based and rackmount computing and storage infrastructure for ... launch of its high density scale-out, two-in-one video ... Slipstream™ RM1622D . The high density, two-in-one system ... product family with Intel® Iris™ Pro graphics P6300 ...
(Date:6/2/2015)... --  BioClinica ® , Inc., a specialty clinical ... David Peters , an accomplished senior finance and accounting ... Financial Officer (CFO) and will be joining BioClinica on ... 25 years of financial and accounting experience with a ... knowledge in all areas of finance, accounting and business ...
(Date:6/2/2015)... 2, 2015 /PRNewswire/ -- China Cord Blood Corporation (NYSE: CO ... China,s leading provider of cord blood collection, laboratory ... today announced that the Special Committee of the Company,s board ... ( China ) Limited as its independent ... as its United States legal counsel ...
(Date:6/2/2015)... 2015 MGB Biopharma at ... problem  MGB Biopharma, a biopharmaceutical company ... address the major global problem of antibiotic resistance ... intravenous (IV) formulation of MGB-BP-3, designed for the treatment ... The intravenous formulation of MGB-BP-3 is currently ...
Breaking Biology Technology:Cirrascale® Announces Support for Intel® Xeon® Processor E3-1200 v4 Product Family; Launches Server Offering Optimized for Low Cost-per-Stream Transcoding Applications 2Cirrascale® Announces Support for Intel® Xeon® Processor E3-1200 v4 Product Family; Launches Server Offering Optimized for Low Cost-per-Stream Transcoding Applications 3BioClinica Names David Peters New Chief Financial Officer 2China Cord Blood Corporation's Special Committee Appoints Independent Financial Advisor and Legal Counsel to Evaluate Non-binding "Going Private" Proposal 2China Cord Blood Corporation's Special Committee Appoints Independent Financial Advisor and Legal Counsel to Evaluate Non-binding "Going Private" Proposal 3MGB Biopharma Succeeds in Developing an IV Formulation of MGB-BP-3 for the Treatment of Systemic Susceptible and Resistant Gram-Positive Hospital-Acquired Infections 2MGB Biopharma Succeeds in Developing an IV Formulation of MGB-BP-3 for the Treatment of Systemic Susceptible and Resistant Gram-Positive Hospital-Acquired Infections 3
... other rhetoric given by spokespeople from the incumbent telephone companies, ... should be asking this simple question: "Are they delivering what ... ,What speed are you really running at on your PC? ... for a full T-1 price? These would seem to be ...
... Greater Madison Chamber of Commerce has ... small businesses to resources such as ... and area business publications. It's also ... with chamber members who provide related ...
... Primex Wireless Inc. said ... Technologies Inc. in Deerfield. The suit involved ... or other institutions based on the clocks in ... terms of the settlement were not disclosed. Primex ...
Cached Biology Technology:Are speedometers for high-speed Internet service a new must-have? 2Are speedometers for high-speed Internet service a new must-have? 3
Eagle's Ham's amino acids; EHAA...
... active ingredient in Molecular Probes. SlowFadeAntifade ... to act as a free radical ... Our original SlowFade formulation (S-2828) was ... of fluorescein to almost zero (Figure ...
... System more than doubles the benefits of ... fast analysis cycles of the standard binary ... in tandem mode. Difficult separations are dramatically ... or heartcut configurations, on-line sample preparation is ...
... The PerkinElmer kit provides reagents for ... in serum and plasma samples using a ... samples are then neutralized and transferred to ... highly specific mouse monoclonal antibody to HIV-1 ...
Biology Products: