Navigation Links
Nanorings
Date:3/5/2008

This release is available in German.

What appear under an atomic force microscope to be tiny rings with little bits missing are actually nanoscopic rings made of double-stranded DNA with a little gap in the form of a short single-stranded fragment. As Michael Famulok and his team from the University of Bonn, Germany, explain in the journal Angewandte Chemie , this gap is a place to attach other molecules that have the potential to transform the rings into versatile nanocomposites for various applications.

The programmable aggregation of molecular building blocks into structures with higher order plays a key role in the construction of nanomaterials. Nucleic acids are interesting building block candidates, being easy to synthesize and exhibiting unique molecular recognition characteristics. The difficulty lies in the fact that the construction of defined two- or three-dimensional geometries requires rigid building blocks. However, DNA molecules are normally flexible structures.

From the structural point of view, miniature rings represent the simplest form for a rigid object made of DNA, says Famulok. His team thus took on the challenge of producing DNA molecules with a smooth circular structure, free of ring deformations, twists, or knots. This was not an easy endeavor. DNA is usually found in the form of a double strand with a helical twist and can, if it is too short, close on itself to form a ring. On the other hand, if the ring gets too large, it is no longer rigid. Famulok and his team have now succeeded, by careful selection of the sequence and number of nucleotides as well as a clever synthetic route, in producing the desired rigid rings.

Even better, the researchers were able to build a gap into their ringsa short sequence that does not occur in normal base pairing, instead exiting as a single-stranded segment. This should make it possible to fit the ring with tailored functionality for special applications. All that needs to be done is to produce a short single strand of DNA complementary to the single-stranded part of the ring and to attach it to a molecule with the desired properties. This single strand then fits perfectly into the gap. This allows the ring to be equipped as desired, depending on the requirements of the application in question. For example, it can be given anchors that precisely bind the rings to other components.

Our new, uncomplicated method for the production of rigid DNA nanorings with variable, tailor-made functionality opens new pathways for the construction of DNA objects with higher levels of organization, Famulok is convinced.


'/>"/>

Contact: Michael Famulok
m.famulok@uni-bonn.de
49-228-735-661
Wiley-Blackwell
Source:Eurekalert

Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/31/2016)... , March 31, 2016 ... ) ("LegacyXChange" or the "Company") LegacyXChange is ... users of its soon to be launched online site ... https://www.youtube.com/channel/UCyTLBzmZogV1y2D6bDkBX5g ) will also provide potential shareholders ... of DNA technology to an industry that is notorious ...
(Date:3/29/2016)... Florida , March 29, 2016 ... the "Company") LegacyXChange "LEGX" and SelectaDNA/CSI Protect are pleased ... in ink used in a variety of writing instruments, ... Buyers of originally created collectibles from athletes on LegacyXChange ... forensic analysis of the DNA. Bill ...
(Date:3/22/2016)... India , March 22, 2016 /PRNewswire/ ... market research report "Electronic Sensors Market for Consumer ... Proximity, & Others), Application (Communication & IT, ... Geography - Global Forecast to 2022", published ... industry is expected to reach USD 26.76 ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... Researchers at ... most commonly-identified miRNAs in people with peritoneal or pleural mesothelioma. Their findings are the ... read it now. , Diagnostic biomarkers are signposts in the blood, lung fluid ...
(Date:6/23/2016)... ... 23, 2016 , ... UAS LifeSciences, one of the leading ... UP4™ Probiotics, into Target stores nationwide. The company, which has been manufacturing high ... its list of well-respected retailers. This list includes such fine stores as Whole ...
(Date:6/23/2016)... , June 23, 2016 /PRNewswire/ - FACIT ... Ontario biotechnology company, Propellon Therapeutics ... development and commercialization of a portfolio of first-in-class ... Epigenetic targets such as WDR5 represent an exciting ... significantly in precision medicine for cancer patients. Substantial ...
(Date:6/23/2016)... Houston Methodist Willowbrook Hospital has signed ... to serve as their official health care provider. ... will provide sponsorship support, athletic training services, and ... volunteers, athletes and families. "We are ... and to bring Houston Methodist quality services and ...
Breaking Biology Technology: