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The DNA Helix

The DNA Helix

Deoxyribonucleic acid, or DNA, is the genetic material responsible for passing traits from generation to generation in all organisms and most viruses. DNA is composed of two strands of nucleotides that wind around each other to form a spring-like structure called a double helix. However, the double helix is not perfectly symmetrical. Instead, there are regularly occurring grooves in the structure. The major groove occurs where the sugar-phosphate backbones are relatively far apart. This space...

The DNA Helix

The DNA Helix

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Analyzing and Building Nucleic Acid Structures with 3DNA

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Published on: April 26, 2013

Triple-helix DNA structural studies using a Love wave acoustic biosensor.

George Papadakis¹, Achilleas Tsortos, Electra Gizeli

¹Institute of Molecular Biology and Biotechnology, FO.R.T.H, Vassilika Vouton, 71110, Heraklion, Greece

Biosensors & Bioelectronics

|September 15, 2009

Summary

This study introduces an acoustic biosensor to measure DNA bending by triplex-forming oligos (TFOs). The novel method accurately quanties DNA conformation changes, aiding drug design.

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Area of Science:

Biophysics
Molecular Biology
Sensor Technology

Background:

Detecting molecular conformation is crucial for pharmaceutical development and drug design.
Triplex-forming oligos (TFOs) are non-natural DNA agents that alter DNA mechanics by forming triple-helical structures.
Understanding DNA conformation and flexibility is key to developing new therapeutic strategies.

Purpose of the Study:

To utilize triplex-forming oligos (TFOs) as a model system for studying DNA conformation.
To develop and validate an acoustic biosensor for determining molecular geometrical features of DNA.
To assess the potential of acoustic biosensing for evaluating DNA conformational changes.

Main Methods:

Employed triplex-forming oligos (TFOs) to induce specific DNA bending.
Utilized an acoustic biosensor to measure acoustic energy and phase changes upon binding of pre-formed triplex DNA.
Correlated acoustic measurements with established molecular biology techniques.

Main Results:

The acoustic biosensor successfully detected and quantified DNA bending induced by TFOs.
Derived DNA bending angles from acoustic measurements showed excellent agreement with previously reported values.
The technique provided rapid qualitative and quantitative information on DNA conformational changes.

Conclusions:

The developed acoustic biosensor is a viable tool for biophysical studies of DNA molecules.
The method offers a promising approach for high-throughput evaluation of DNA conformational changes.
This technique holds potential for applications in drug design and pharmaceutical research.