Søren Preus

Søren Preus
Aarhus University | AU · Interdisciplinary Nanoscience Centre iNANO

Post-doc

About

26
Publications
3,288
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
744
Citations
Additional affiliations
January 2010 - May 2010
Stanford University
Position
  • Visiting Researcher
April 2009 - December 2012
University of Copenhagen
Position
  • PhD Student
February 2008 - December 2012
Chalmers University of Technology
Position
  • PhD Fellow & Visiting Researcher
Education
April 2009 - December 2012
University of Copenhagen & Chalmers University of Technology
Field of study
  • Data Analysis | Optical Spectroscopy | Biophysics
March 2007 - March 2009
University of Copenhagen
Field of study
  • Nanoscience
September 2003 - March 2007
University of Copenhagen
Field of study
  • Nanotechnology

Publications

Publications (26)
Article
Biosensors play increasingly important roles in many fields, from clinical diagnosis to environmental monitoring, and there is a growing need for cheap and simple analytical devices. DNA nanotechnology provides methods for the creation of sophisticated biosensors, however many of the developed DNA-based sensors are limited by cumbersome and time-co...
Article
Full-text available
The bright fluorescent cytosine analogue tCO stands out among fluorescent bases due to its virtually unquenched fluorescence emission in duplex DNA. However, like most reported base analogues, it has not been thoroughly characterized in RNA. We here report on the first synthesis and RNA-incorporation of tCO, and characterize its base-mimicking and...
Article
Single-molecule total internal reflection fluorescence (TIRF) microscopy constitutes an umbrella of powerful tools that facilitate direct observation of the biophysical properties, population heterogeneities, and interactions of single biomolecules without the need for ensemble synchronization. Due to the low signal/noise ratio in single-molecule T...
Article
Single-molecule total internal reflection fluorescence (TIRF) microscopy combined with Forster Resonance Energy Transfer (FRET) is a powerful tool that allows direct observation of structural dynamics and heterogeneities without the need for ensemble synchronization. The weak signals in single-molecule TIRF microscopy experiments imply that backgro...
Article
Full-text available
G-quadruplex structures can occur throughout the genome, including at telomeres. They are involved in cellular regulation and are potential drug targets. Human telomeric G-quadruplex structures can fold into a number of different conformations and show large conformational diversity. To elucidate the different G-quadruplex conformations and their d...
Article
Full-text available
Fluorescent base analogues (FBAs) comprise a family of increasingly important molecules for the investigation of nucleic acid structure and dynamics. We recently reported the quantum chemical calculation supported development of four microenvironment sensitive analogues of the quadracyclic adenine (qA) scaffold, the qANs, with highly promising abso...
Article
Förster Resonance energy transfer (FRET) microscopy at the single molecule level has the potential to yield information on intra and intermolecular distances within the 2-10 nm range of molecules or molecular complexes that undergo frequent conformation changes. A pre-requirement for obtaining accurate distance information is to determine quantitat...
Article
Fluorescent base analogues comprise a group of increasingly important molecules for the investigation of nucleic acid structure, dynamics, and interactions with other molecules. Herein, we report on the quantum chemical calculation aided design, synthesis, and characterization of four new putative quadracyclic adenine analogues. The compounds were...
Article
Guidelines for submitting commentsPolicy: Comments that contribute to the discussion of the article will be posted within approximately three business days. We do not accept anonymous comments. Please include your email address; the address will not be displayed in the posted comment. Cell Press Editors will screen the comments to ensure that they...
Article
DNA hybridization allows the design and assembly of dynamic DNA-based molecular devices. Such structures usually accomplish their function by the addition of fuel strands that drive the structure from one conformation to a new one or by internal changes in DNA hybridization. We report here on the performance and robustness of one of these devices b...
Article
While fluorescent analogues of the canonical nucleobases have proven to be highly valuable in a large number of applications, up until today, fluorescent DNA base analogues remain virtually inapplicable for single-molecule fluorescence experiments which require extremely bright and photostable dyes. Insight into the photodegradation processes of th...
Article
Full-text available
A programmable switch based on a DNA hairpin loop is functionalised with a rigid or flexible porphyrin or FAM and TAMRA FRET pair, which provides insight into the restructuring of the hairpin as well as porphyrin-porphyrin coupling. The switch contains five discrete states which can be accessed independently and followed by real-time spectroscopy,...
Article
Förster resonance energy transfer (FRET) is a powerful tool for monitoring molecular distances and interactions at the nanoscale level. The strong dependence of transfer efficiency on probe separation makes FRET perfectly suited for “on/off” experiments. To use FRET to obtain quantitative distances and three-dimensional structures, however, is more...
Article
Full-text available
Förster resonance energy transfer (FRET) is a technique commonly used to unravel the structure and conformational changes of biomolecules being vital for all living organisms. Typically, FRET is performed using dyes attached externally to nucleic acids through a linker that complicates quantitative interpretation of experiments because of dye diffu...
Article
Fluorescent-base analogues (FBAs) comprise a group of increasingly important molecules for the investigation of nucleic acid structure and dynamics as well as of interactions between nucleic acids and other molecules. Here, we report on the synthesis, detailed spectroscopic characterisation and base-pairing properties of a new environment-sensitive...
Article
Fundamental insight into the unique fluorescence and nucleobase-mimicking properties of the fluorescent nucleobase analogues of the tC family is not only vital in explaining the behaviour of these probes in nucleic acid environments, but will also be profitable in the development of new and improved fluorescent base analogues. Here, temperature-dep...
Article
The fluorescent nucleobase analogs of the tricyclic cytosine (tC) family are promising nucleic acid probes capable of being inserted into double-stranded DNA as a replacement for one of the natural bases without perturbing the overall double helical structure. The high fluorescence quantum yields in both single- and double stranded DNA, combined wi...
Article
The fluorescent nucleobase analogues of the tricyclic cytosine (tC) family, tC and tC(O), possess high fluorescence quantum yields and single fluorescence lifetimes, even after incorporation into double-stranded DNA, which make these base analogues particularly useful as fluorescence resonance energy transfer (FRET) probes. Recently, we reported th...
Article
We present the first nucleobase analog fluorescence resonance energy transfer (FRET)-pair. The pair consists of tC(O), 1,3-diaza-2-oxophenoxazine, as an energy donor and the newly developed tC(nitro), 7-nitro-1,3-diaza-2-oxophenothiazine, as an energy acceptor. The FRET-pair successfully monitors distances covering up to more than one turn of the D...
Article
Full-text available
New perylene diimide (PDI) dimers (bis(PDI)s) with either tetraethynylethene (TEE) or 2,4-hexadiyne as the bridging unit were synthesized and the degree of intramolecular communication between the two PDI units was investigated as a function of the spacer unit and solvent polarity by absorption and emission spectroscopies, electrochemistry, and by...

Network

Cited By