Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Mussel Adhesive for DNA Chips

23.12.2010
Easy universal DNA immobilization on surfaces with a synthetic mussel polymer

Mussels are true masters of adhesion. Whether on the wood of a pier, the metal of a ship’s hull, rocks, or to their own kind, they stick to everything. Researchers led by Philip B. Messersmith at Northwestern University (Evanston, IL/USA) have successfully synthesized a mimic of one of the “universal adhesives” used by mussels.

As the scientists report in the journal AngewandteChemie, they were able to use their synthetic “mussel glue” to fix DNA molecules on various substrates. This new, simple method seems particularly promising for the production of DNA chips for diagnostics and research.

Modern analytical strategies for the detection and analysis of biomolecules are often based on robust and inexpensive methods for immobilizing DNA, proteins, and other biomolecules on surfaces. DNA microarray techniques involve the arrangement of different DNA probes on a single chip. Various target DNA molecules are selectively fished out of the many found in a DNA sample. The target DNA is identified by means of the binding location on the chip, because the location of every probe on the chip is documented.

“Previous anchoring strategies have generally been developed specifically for a single substrate,” says Messersmith, “they are thus ineffective on other substrates.” Messersmith and his colleagues have now developed a universal method—inspired by mussels—that can adhere to just about any material desired. Biopolymers responsible for the unusual adhesive properties of mussels have now been identified. These polymers are rich in catechol and amino groups. “We have synthesized a catecholamine polymer that mimics the chemistry of the musselproteins,” reports Messersmith.

The new approach is rather simple: Just place the desired substrate in a solution of the catecholamine polymer overnight. The polymer adheres as a thin layer on any of the usual substrates used for DNA arrays, such as glass, as well as less common substrates such as gold, platinum, oxides, semiconductors, or various polymer substrates. The coating then easily binds DNA molecules without influencing their biological activity. This makes it possible to make micropatterns with DNA (DNA spotting), as is required for DNA chips.

The secret of the success of the catecholamine polymer: it contains special groups of atoms that can bind to a diversity of substrate materials through a variety of mechanisms. On the other hand, target DNA molecules from a sample bind exclusively to the corresponding specific DNA probes, without requiring a treatment to block unspecific binding to the substrate. Says Messersmith: “The new coating strategy may significantly simplify DNA microarray technology.”

Author: Phillip B. Messersmith, Northwestern University, Evanston (USA), http://biomaterials.bme.northwestern.edu/people.asp

Title: Facile DNA Immobilization on Surfaces through Catecholamine Polymer

Angewandte Chemie International Edition, Permalink to the article: http://dx.doi.org/10.1002/anie.201005001

Phillip B. Messersmith | Angewandte Chemie
Further information:
http://www.pressroom.angewandte.org

Further reports about: Angewandte Chemie DNA DNA chips DNA molecule

More articles from Life Sciences:

nachricht Researchers identify potentially druggable mutant p53 proteins that promote cancer growth
09.12.2016 | Cold Spring Harbor Laboratory

nachricht Plant-based substance boosts eyelash growth
09.12.2016 | Fraunhofer-Institut für Angewandte Polymerforschung IAP

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Electron highway inside crystal

Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.

Topological insulators are currently the hot topic in physics according to the newspaper Neue Zürcher Zeitung. Only a few weeks ago, their importance was...

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Researchers identify potentially druggable mutant p53 proteins that promote cancer growth

09.12.2016 | Life Sciences

Scientists produce a new roadmap for guiding development & conservation in the Amazon

09.12.2016 | Ecology, The Environment and Conservation

Satellites, airport visibility readings shed light on troops' exposure to air pollution

09.12.2016 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>