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5'-THIO PHOSPHATE DIRECTED LIGATION OF OLIGONUCLEOTIDES AND USE IN DETECTION OF SINGLE NUCLEOTIDE POLYMORPHISMS
5'-THIO PHOSPHATE DIRECTED LIGATION OF OLIGONUCLEOTIDES AND USE IN DETECTION OF SINGLE NUCLEOTIDE POLYMORPHISMS
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机译:5'-硫代磷酸酯修饰的寡核苷酸定向连接及其在检测单个核苷酸多态性中的用途
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摘要
The present invention provides a novel method for ligation of oligonucleotides containing 5'-phosphorothioates on complementary templates by the action of DNA ligases. This reaction is readily applied to the synthesis of a single stranded circular DNA containing a phosphorothioate directed ligation reaction by ATP dependent DNA ligase reaction is similar to conventional 5'-phosphate ligation. The utility of enzymatic ligation in probing specific sequences of DNA is also described. The present invention also provides a novel non-enzymatic ligation of 5'-phosphorothioates that has been applied to the synthesis of single strand phosphorothioate and phosphate circular DNA. A process for detecting the presence of a mismatch in an otherwise complementary pair of oligonucleotides is disclosed using an enzyme-based technique which shows the presence of a mismatch by failing to form a ligated single stranded DNA circle that can optionally be amplified using standard methods of rolling circle amplification.
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