Error-free sequencing of DNA
First Claim
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1. A method of error-free sequencing of DNA, comprising the steps of:
- (a) providing a sample comprising DNA;
(b) digesting the DNA with a restriction endonuclease under conditions suitable to obtain DNA fragments of similar length,wherein said restriction endonuclease is capable of providing 5′
overhangs, wherein the terminal nucleotide of the overhang is phosphorylated or,wherein said restriction endonuclease is capable of providing 3′
overhangs, wherein the terminal nucleotide of the overhang is hydroxylated on said DNA fragments;
(c) annealing a first oligonucleotide to said DNA fragments, wherein a first sequence of said first oligonucleotide is complementary to the 5′
or 3′
overhang, respectively, of said DNA fragment, and a second sequence of said first oligonucleotide is complementary to a first sequence of a second oligonucleotide, wherein said second oligonucleotide comprises a second and a third sequence, wherein said second sequence of said second oligonucleotide comprises a randomized sequence;
(d) ligating said second oligonucleotide to said DNA fragment;
(e) filling in of the generated overhangs;
(f) amplifying said DNA fragments using a third oligonucleotide comprising a sequence binding to said third sequence of said second oligonucleotide; and
(g) sequencing said amplified DNA fragments.
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Abstract
The invention relates to a novel method of error-free sequencing of DNA. Further, the present invention provides for a four-part oligonucleotide, comprising a fixed sequence, a randomized sequence, a restriction nuclease recognition site and/or restriction site, and a primer binding site. The invention also relates to the use of the sequenced DNA fragments obtained by the methods of the invention in methods for DNA sequence analysis, generation of cell lineage trees or assessment of copy numbers.
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Citations
12 Claims
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1. A method of error-free sequencing of DNA, comprising the steps of:
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(a) providing a sample comprising DNA; (b) digesting the DNA with a restriction endonuclease under conditions suitable to obtain DNA fragments of similar length, wherein said restriction endonuclease is capable of providing 5′
overhangs, wherein the terminal nucleotide of the overhang is phosphorylated or,wherein said restriction endonuclease is capable of providing 3′
overhangs, wherein the terminal nucleotide of the overhang is hydroxylated on said DNA fragments;(c) annealing a first oligonucleotide to said DNA fragments, wherein a first sequence of said first oligonucleotide is complementary to the 5′
or 3′
overhang, respectively, of said DNA fragment, and a second sequence of said first oligonucleotide is complementary to a first sequence of a second oligonucleotide, wherein said second oligonucleotide comprises a second and a third sequence, wherein said second sequence of said second oligonucleotide comprises a randomized sequence;(d) ligating said second oligonucleotide to said DNA fragment; (e) filling in of the generated overhangs; (f) amplifying said DNA fragments using a third oligonucleotide comprising a sequence binding to said third sequence of said second oligonucleotide; and (g) sequencing said amplified DNA fragments. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification