Releasable nonvolatile mass label molecules
First Claim
1. A method for detecting a target molecule, comprising:
- (a) obtaining a target molecule;
(b) amplifying the target molecule to produce an amplified target molecule;
(c) obtaining a probe comprising a polynucleotide reactive group, a release group and a mass label;
(d) hybridizing the amplified target molecule to the probe to produce a probe;
amplified target molecule complex;
(e) releasing the mass label from the probe;
amplified target molecule complex to obtain a released mass label; and
(f) determining the mass of the released mass label by mass spectrometry, thereby detecting the target molecule.
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Accused Products
Abstract
Using nonvolatile, releasable, mass-labels, the present invention provides for the synthesis and use of mass-labeled compounds to specifically interact with biomolecular targets. Following binding of the mass-labeled compounds to the target molecule, the unique mass-label can be analyzed using mass spectrometry to identify and characterize the target molecule. In one embodiment of the invention, a mass-labeled oligonucleotide probe is used to identify a specific gene sequence. A myriad of mass-labeled compounds may be produced for use in a wide variety of interactions such as oligonucleotide-oligonucleotide hybridization, polynucleotide-polynucleotide interactions, enzyme-substrate or substrate analog/intermediate interactions, polypeptide-nucleic acid interactions, protein-ligand interactions, receptor-ligand interactions, polypeptide-metal interactions, nucleic acid-metal interactions or antigen-antibody interactions. Also contemplated are combinatorial processes for creating large libraries of compounds permitting rapid screening for a wide variety of targets.
294 Citations
90 Claims
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1. A method for detecting a target molecule, comprising:
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(a) obtaining a target molecule;
(b) amplifying the target molecule to produce an amplified target molecule;
(c) obtaining a probe comprising a polynucleotide reactive group, a release group and a mass label;
(d) hybridizing the amplified target molecule to the probe to produce a probe;
amplified target molecule complex;
(e) releasing the mass label from the probe;
amplified target molecule complex to obtain a released mass label; and
(f) determining the mass of the released mass label by mass spectrometry, thereby detecting the target molecule. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
(a) immobilizing the polynucleotide reactive group onto the solid support after addition of the nucleotide or oligonucleotide; and
(b) removing any probes having unbound reactive groups prior to releasing the mass label of any probe having a bound reactive group.
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24. The method of claim 1, wherein the reactive and release groups are the same.
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25. The method of claim 1, wherein the release group is contained within the reactive group.
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26. The method of claim 1, wherein the probe comprises at least two mass labels having different masses.
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27. The method of claim 1, wherein the target molecule is contacted with a plurality of probes.
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28. The method of claim 27, wherein each reactive group is associated with a unique mass label.
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29. The method of claim 27, wherein each reactive group is associated with a unique set of mass labels.
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30. The method of claim 29, wherein the released mass label comprises a unique set of mass labels.
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31. The method of claim 30, wherein each member of the set of mass labels is attached to a different probe.
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32. The method of claim 1, wherein the amplified target molecule comprises a double-stranded molecule, each strand having a 3′
- end and a 5′
end, said double-stranded molecule containing a mismatch and the 3′
ends are not capable of being digested by an exonuclease.
- end and a 5′
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33. The method of claim 32, further comprising
cleaving at least one strand of the double-stranded molecule at the mismatch; - and selectively releasing the mass label by digesting the cleaved strand with a 3′
to 5′
exonuclease.
- and selectively releasing the mass label by digesting the cleaved strand with a 3′
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34. The method of claim 33, wherein the mismatch is cleaved by an enzyme.
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35. The method of claim 34, wherein the enzyme comprises mutHLS, T4 endonuclease VII, mutY DNA glycosylase, thymine mismatch DNA glycosylase, or endonuclease V.
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36. The method of claim 33, wherein the mismatch is cleaved by a chemical.
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37. The method of claim 36, wherein the chemical comprises OsO4, HONH2, or KMnO4.
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38. The method of claim 33, wherein the 3′
- to 5′
exonuclease comprises exonuclease III.
- to 5′
- 11. The method of 10, wherein the exonuclease is specific for double-stranded DNA.
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39. A method for detecting a target molecule, said method comprising the steps of:
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(a) obtaining a probe comprising a polynucleotide reactive group, a release group and a nonvolatile mass label;
(b) obtaining a target molecule;
(c) contacting the target molecule with the probe to produce a probe;
target molecule complex;
(d) selectively releasing the mass label from the probe;
target molecule complex; and
(e) determining the mass of the mass label by mass spectrometry, thereby detecting the target molecule. - View Dependent Claims (40, 41, 42, 43, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
(a) immobilizing the polynucleotide reactive group onto the solid support after the addition of the nucleotide or oligonucleotide; and
(b) removing any probes having unbound reactive groups prior to releasing their mass labels.
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- 44. The method of 43, wherein the exonuclease is specific for double-stranded DNA.
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59. A method for detecting a target molecule, said method comprising the steps of:
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(a) amplifying a target nucleic acid to produce amplified nucleic acid products;
(b) obtaining one or more first molecules, said first molecules comprising a polynucleotide reactive group, a release group and a nonvolatile mass label;
(c) incorporating said first molecules into the amplified nucleic acid product during the amplification process to process to produce incorporated mass labeled molecules and unincorporated mass labeled molecules;
(d) releasing the mass labels incorporated into the amplified nucleic acid products to produce released mass labels; and
(e) determining the mass of the released mass labels by mass spectrometry, thereby detecting the target molecule. - View Dependent Claims (60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90)
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Specification