Navigation Links
Scientists trick bacteria with small molecules
Date:10/7/2010

New Haven, Conn.A team of Yale University scientists has engineered the cell wall of the Staphylococcus aureus bacteria, tricking it into incorporating foreign small molecules and embedding them within the cell wall.

The finding, described online in the journal ACS Chemical Biology this week, represents the first time scientists have engineered the cell wall of a pathogenic "Gram-positive" bacteriaorganisms responsible not only for Staph infections but also pneumonia, strep throat and many others. The discovery could pave the way for new methods of combating the bacteria responsible for many of the most infectious diseases.

The team engineered one end of their small molecules to contain a peptide sequence that would be recognized by the bacteria. In Staphylococcus aureus, an enzyme called sortase A is responsible for attaching proteins to the cell wall.

"We sort of tricked the bacteria into incorporating something into its cell wall that it didn't actually make," said David Spiegel, a Yale chemist who led the study. "It's as if the cell thought the molecules were its own proteins rather than recognizing them as something foreign."

The scientists focused specifically on the cell wall because it contains many of the components the cell uses to relate to its environment, Spiegel said. "By being able to manipulate the cell wall, we can in theory perturb the bacteria's ability to interact with human tissues and host cells."

The team used three different small molecules in their experiment including biotin, fluorescein and azide but the technique could be used with other molecules, Spiegel said, as well as with other types of bacteria. Another advantage to the new technique is that the scientists did not have to first genetically modify the bacteria in any way in order for them to incorporate the small molecules, meaning the method should work on naturally occurring bacteria in the human body.

Staph infections, such as the drug-resistant MRSA, have plagued hospitals in recent years. More Americans die each year from Staphylococcus aureus infections alone than from HIV/AIDS, Parkinson's disease or emphysema.

Being able to engineer the cell walls of not only Staphylococcus aureus but a whole family of bacteria could have widespread use in combating these illnesses, Spiegel said, adding that any number of small molecules could be used with their technique. "For example, if we tag these bacteria with small fluorescent tracer molecules, we could watch the progression of disease in the human body in real time." The molecules could also be used to help recruit antibodies that occur naturally in the bloodstream, boosting the body's own immune response to diseases that tend to go undetected, such as HIV/AIDS or cancer.

"This technique has the potential to help illuminate basic biological processes as well as lead to novel therapeutics from some of the most common and deadly diseases affecting us today," Spiegel said.


'/>"/>

Contact: Suzanne Taylor Muzzin
suzanne.taylormuzzin@yale.edu
203-432-8555
Yale University
Source:Eurekalert

Related biology news :

1. DFG awards 4 young scientists 2010 Bernd Rendel Prize
2. Scripps Research scientists develop novel test that identifies river blindness
3. AgriLife Research scientists complete two-year study on short-day onions
4. MBL scientists reveal findings of World Ocean Microbe Census
5. Surprise: Scientists discover that inflammation helps to heal wounds
6. NOAA-sponsored scientists first to map offshore San Andreas Fault and associated ecosystems
7. Scripps Research scientists win $65 million in new grants to reveal form and function of proteins
8. Chromosomal break gives scientists a break in finding new puberty gene
9. Scientists discover a new way our bodies control blood pressure: the P450-EET system
10. Scientists reveal important clues to how bacteria and viruses are identified as enemies
11. Going green: New program provides vital support for plant scientists
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/24/2016)... Ampronix facilitates superior patient care by providing unparalleled technology to leaders of ... the latest premium product recently added to the range of products distributed by Ampronix. ... ... ... Medical Display- Ampronix News ...
(Date:5/3/2016)... VILNIUS, Lithuania , May 3, 2016 /PRNewswire/ ... today released the MegaMatcher Automated Biometric Identification ... deployment of large-scale multi-biometric projects. MegaMatcher ABIS can ... and accuracy using any combination of fingerprint, face ... of MegaMatcher SDK and MegaMatcher ...
(Date:4/19/2016)... The new GEZE SecuLogic access ... "all-in-one" system solution for all door components. It can ... door interface with integration authorization management system, and thus ... minimal dimensions of the access control and the optimum ... offer considerable freedom of design with regard to the ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... 2016 , ... Supplyframe, the Industry Network for electronics hardware ... . Located in Pasadena, Calif., the Design Lab’s mission is to bring together ... built and brought to market. , The Design Lab is Supplyframe’s physical representation ...
(Date:6/23/2016)... 2016  Blueprint Bio, a company dedicated to identifying, ... community, has closed its Series A funding round, according ... "We have received a commitment from Forentis Fund ... to meet our current goals," stated Matthew Nunez ... to complete validation on the current projects in our ...
(Date:6/23/2016)... ... June 23, 2016 , ... Regulatory Compliance Associates® Inc. (RCA), ... free webinar on Performing Quality Investigations: Getting to Root Cause. ... no charge. , Incomplete investigations are still a major concern to the Regulatory ...
(Date:6/22/2016)... , June 22, 2016 Cell ... will allow them to produce up to one ... one lot within one week. These high-quality, consistent ... laboriously preparing cells and spend more time doing ... through a proprietary, high-volume manufacturing process that produces ...
Breaking Biology Technology: