Detection of nucleic acid sequence differences using the ligase detection reaction with addressable arrays
The present invention describes a method for identifying one or more of a plurality of sequences differing by one or more single base changes, insertions, deletions, or translocations in a plurality of target nucleotide sequences. The method includes a ligation phase, a capture phase, and a detection phase. The ligation phase utilizes a ligation detection reaction between one oligonucleotide probe, which has a target sequence-specific portion and an addressable array-specific portion, and a second oligonucleotide probe, having a target sequence-specific portion and a detectable label. After the ligation phase, the capture phase is carried out by hybridizing the ligated oligonucleotide probes to a solid support with an array of immobilized capture oligonucleotides at least some of which are complementary to the addressable array-specific portion. Following completion of the capture phase, a detection phase is carried out to detect the labels of ligated oligonucleotide probes hybridized to the solid support.
1. An apparatus comprising:
a solid support having an array of positions;
composite oligonucleotides coupled to the solid support at the array of positions, each of said composite oligonucleotides characterized by having a target-specific portion and a zip code portion, wherein the zip code portion of each of the composite oligonucleotides comprises a nucleotide sequence of greater than sixteen nucleotides that differs for each different target-specific portion and hybridizes to its complement under uniform hybridization conditions, wherein the nucleotide sequence of one zip code portion differs from the nucleotide sequence of another zip code portion, when aligned to each other, by at least 25% of the nucleotides; and
one or more detectable labels coupled to at least one of the composite oligonucleotides, thereby facilitating detection of the composite oligonucleotide and its zip code portion.
2. The apparatus of claim 1 further comprising:
an imager for detecting or quantifying at least one of the detectable labels at at least one of the array positions on the solid support.
3. The apparatus of claim 2 , wherein the composite oligonucleotides are coupled to beads.
4. The apparatus of claim 2 , wherein different composite oligonucleotides are coupled to the solid support at different array positions.
5. The apparatus of claim 2 , wherein the solid support having an array of positions comprises a high-density array of composite oligonucleotides immobilized thereto.
6. The apparatus of claim 2 , wherein the solid support is made from a material selected from the group consisting of plastic, ceramic, metal, resin, gel, glass, silicon, and composites thereof.
7. The apparatus of claim 2 , wherein the solid support is in a form selected from the group consisting of slides, discs, membranes, films, and composites thereof.
8. The apparatus of claim 2 , wherein the solid support has wells, raised regions, or etched trenches.
9. The apparatus of claim 2 , wherein the solid support is a microtiter plate.
10. The apparatus of claim 2 , wherein the zip-code portion of the composite oligonucleotide comprises a nucleotide sequence that is complementary to a secondary oligonucleotide probe, and the target specific portion comprises a nucleotide sequence that is the same as, or complementary to, a target nucleotide sequence in a sample.
11. The apparatus of claim 10 , wherein the target nucleotide sequence in the sample comprises an amplification product, or complement thereof, of one or more cellular target nucleic acid sequences.
12. The apparatus of claim 2 , wherein the zip-code portion of the composite oligonucleotide comprises a nucleotide sequence of 24 nucleotides or less.
13. The apparatus of claim 2 , wherein the imager is a fluorescence imager and the detectable label is a fluorescent label suitable for detection by the fluorescence imager.
14. The apparatus of claim 2 , wherein the one or more detectable labels is indicative of the target-specific portion included within the composite oligonucleotide to which it is coupled.
15. The apparatus of claim 2 , wherein the one or more detectable labels is indicative of a nucleic acid sequence in a sample that is the same as, or complementary to, the target-specific portion included within the composite oligonucleotide to which it is coupled.
16. The apparatus of claim 2 , wherein the one or more detectable labels is coupled to the zip-code portion of the composite oligonucleotide in a target specific manner by an enzyme.
17. The apparatus of claim 16 , wherein the enzyme is a ligase.
18. The apparatus of claim 2 , wherein detection of one or more detectable labels coupled to the zip-code portion of the composite oligonucleotides correlates to the presence of one or more target nucleic acid sequences in the sample that is the same as, or complementary to the target-specific portion of the composite oligonucleotide.
19. The apparatus of claim 2 , wherein detection, identification, and quantification of the one or more detectable labels correlates to the presence, identity, or quantity of one or more target nucleic acid sequences in a sample.