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Hybridization-based biosensor containing hairpin probes and use thereof

United States Patent Application

20070059693
A1
View the Complete Application at the US Patent & Trademark Office
A sensor chip that includes: a fluorescence quenching surface; a nucleic acid probe that contains first and second ends with the first end bound to the fluorescence quenching surface, a first region, and a second region complementary to the first region, the nucleic acid probe having, under appropriate conditions, either a hairpin conformation with the first and second regions hybridized together or a non-haipin conformation; and a first fluorophore bound to the second end of the first nucleic acid molecule. When the first nucleic acid molecule is in the hairpin conformation, the fluorescence quenching surface substantially quenches fluorescent emissions by the first fluorophore; and when the first nucleic acid molecule is in the non-hairpin conformation, fluorescent emissions by the fluorophore are substantially free of quenching by the fluorescence quenching surface. Various nucleic acid probes, methods of making the sensor chip, biological sensor devices that contain the sensor chip, and their methods of use are also disclosed.
Miller, BenjaminL (Penfield, NY), Krauss, Todd D. (Penfield, NY), Du, Hui (Rochester, NY), Crnkovich, Nicole (Rochester, NY), Strohsahl, Christopher M. (Saugerties, NY)
UNIVERSITY OF ROCHESTER (611 HYLAND BUILDING P.O. BOX 270142 ROCHESTER NY 14627-0142)
10/ 541,044
January 2, 2004
[0002] The present invention was made in part with funding by the Department of Energy under grant DE-FG-02-02ER63410.A000. The U.S. government may have certain rights in this invention.