Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Scientists Trick Bacteria with Small Molecules

08.10.2010
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” bacteria—organisms 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.

Other authors of the paper include James Nelson, Alexander Chamessian, Patrick McEnaney, Ryan Murelli and Barbara Kazmiercak (all of Yale University).

DOI: 10.1021/cb100195d

Suzanne Taylor Muzzin | EurekAlert!
Further information:
http://www.yale.edu
http://www.opa.yale.edu/news/article.aspx?id=7862

More articles from Life Sciences:

nachricht Complementing conventional antibiotics
24.05.2018 | Goethe-Universität Frankfurt am Main

nachricht Building a brain, cell by cell: Researchers make a mini neuron network (of two)
23.05.2018 | Institute of Industrial Science, The University of Tokyo

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

When corals eat plastics

24.05.2018 | Ecology, The Environment and Conservation

Surgery involving ultrasound energy found to treat high blood pressure

24.05.2018 | Medical Engineering

First chip-scale broadband optical system that can sense molecules in the mid-IR

24.05.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>