Method for genotyping of single nucleotide polymorphism
First Claim
1. A method for determining a nucleotide in a polynucleotide, comprising the following steps:
- a. providing a polynucleotide comprising at least one target site, and a first region of nucleotides immediately adjacent to the target site;
b. then combining the polynucleotide with;
a minisequencing primer complementary to the first region of nucleotides;
three dideoxynucletides selected from the group consisting of ddATP, ddCTP, ddTTP and ddGTP;
a deoxynucleotide selected from the group consisting of dATP, dCTP, dTTP and dGTP;
wherein the nucleotide of the deoxynucleotide is not the same as the nucleotide in the dideoxynulceotide; and
c. then extending the mini-sequencing primer with dideoxynucletide or deoxynulceotide whose base is complementary to the base at the target site, to provide extension products; and
d. then analyzing the extension products with mass spectrometry.
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Abstract
The VSET method comprises: providing a polynucleotide acid sample comprising at least one target site, and a first region of nucleotides immediately adjacent to the target site; preferably genomic DNA; preferably amplifying the polynucleotide; then combining the polynucleotide sample with: three dideoxynucletides selected from the group of ddGTP, ddATP, ddCTP, and ddTTP; and one deoxynucleotide selected from the group consisting of and dGTP, dATP, dCTP, and dTTP wherein the nucleotide of the deoxynucleotide is not the same as the nucleotide in the dideoxynulceotide; and a mini-sequencing primer complementary to the first region of nucleotides; extending the mini-sequencing primer with a dideoxynucletide or deoxynulceotide whose base is complementary to the base at the target site, to provide extension products; and then identifying the extension products, preferably by (MALDI-TOF) mass spectrometry. One of the three ddNTps is complementary to one of the allelic variations at the single point mutation site while the deoxynucleotide is complementary to the other allelic variant at the single point mutation site. The mini-sequencing primer hybridizes to a polynucleotide sequence immediately next to a single point mutation site and is extended by the DNA polymerases. The genotype at the variable site is determined on the basis of the number of nucleotides contained in the extension products.
42 Citations
27 Claims
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1. A method for determining a nucleotide in a polynucleotide, comprising the following steps:
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a. providing a polynucleotide comprising at least one target site, and a first region of nucleotides immediately adjacent to the target site;
b. then combining the polynucleotide with;
a minisequencing primer complementary to the first region of nucleotides;
three dideoxynucletides selected from the group consisting of ddATP, ddCTP, ddTTP and ddGTP;
a deoxynucleotide selected from the group consisting of dATP, dCTP, dTTP and dGTP;
wherein the nucleotide of the deoxynucleotide is not the same as the nucleotide in the dideoxynulceotide; and
c. then extending the mini-sequencing primer with dideoxynucletide or deoxynulceotide whose base is complementary to the base at the target site, to provide extension products; and
d. then analyzing the extension products with mass spectrometry. - View Dependent Claims (2, 3, 4, 5, 6, 27)
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7. A method for determining a nucleotide in a single nucleotide polymorphism, comprising the following steps:
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a. providing a polynucleotide comprising at least one single nucleotide polymorphism site, and a first region of nucleotides immediately adjacent to the polymorphism site;
b. then combining the polynucleotide with;
a minisequencing primer which is complementary to the first nucleotide region;
three different dideoxynucletides selected from the group consisting of ddATP, ddCTP, ddTTP and ddGTP;
a deoxynucleotide selected from the group consisting of dATP, dCTP, dTTP and dGTP;
wherein the nucleotide of the deoxynucleotide is not the same as the nucleotide in the dideoxynulceotide; and
c. extending the mini-sequencing primer with dideoxynucletide or deoxynulceotide whose base is complementary to the base at the single nucleotide polymorphism site, to provide extension products; and
d. analyzing the extension products with mass spectrometry. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for determining the nucleotides in multiple nucleotide polymorphism sites, comprising the following steps:
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a. providing a polynucleotide sample comprising;
a first polynucleotide comprising at least one single nucleotide polymorphism site, and a first region of nucleotides immediately adjacent to the polymorphism site;
a second polynucleotide comprising at least one single nucleotide polymorphism site, and a second region of nucleotides immediately adjacent to the polymorphism site;
b. then combining the polynucleotide sample with;
a first minisequencing primer which is complementary to the first nucleotide region;
a second minisequencing primer which is complementary to the second nucleotide region;
three different dideoxynucletides selected from the group consisting of ddATP, ddCTP, ddTTP and ddGTP;
a deoxynucleotide selected from the group consisting of dATP, dCTP, dTTP and dGTP;
wherein the nucleotide of the deoxynucleotide is not the same as the nucleotide in the dideoxynulceotide; and
c. extending the mini-sequencing primer with a dideoxynucletide or deoxynulceotide whose base is complementary to the base at the single nucleotide polymorphism site, to provide extension products; and
d. analyzing the extension products with mass spectrometry. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification