Design and evaluation of single-stranded DNA carrier molecules for DNA-directed assembly

Journal of Biomolecular Structure & Dynamics
Udo FeldkampChristof M Niemeyer

Abstract

Due to the exceptional molecular recognition properties of nucleic acids, the computational design of DNA sequence motifs is of paramount interest for a wide variety of applications, ranging from DNA-based nanotechnology and DNA computing to the broad field of DNA microarray technologies. These applications rely on the specificity of Watson-Crick base-pairing, and thus, are highly sensitive to non-specific interactions and the formation of any undesired secondary structures, which contradict an efficient intermolecular hybridization. Here we report on the in silico design and in vitro evaluation of single-stranded DNA (ssDNA) carrier strands for the directional DNA-based positioning of streptavidin (STV) conjugates covalently tagged with short ssDNA oligonucleotides. Each such carrier strand consists of four hybridization sites complementary to the conjugate DNA strands. The high and homogeneous hybridization efficiency measured in vitro by microarray hybridization assays confirms the quality of our in silico sequence design method. Hybridization efficiency of DNA-STV-conjugates depends on the position of the hybridization site in the carrier sequence, where the positions nearest to and farthest from the microarray surface prov...Continue Reading

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Citations

Oct 1, 2007·Expert Opinion on Medical Diagnostics·Janet Barletta, Amelita Bartolome
Jun 17, 2009·Journal of Computational Chemistry·Udo Feldkamp
Oct 1, 2008·Biochemical and Biophysical Research Communications·Joachim Müller, Christof M Niemeyer

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