KR101357237B1 - Pcr 앰플리콘의 희석 단계를 포함하는 dna 용융 분석을 이용한 snp 지노타이핑 방법 - Google Patents
Pcr 앰플리콘의 희석 단계를 포함하는 dna 용융 분석을 이용한 snp 지노타이핑 방법 Download PDFInfo
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Abstract
Description
도 2는 용융 분석(melting analysis)에 대한 앰플리콘 Tm의 효과를 나타낸 것이다.
도 3은 멀티플렉싱(multiplexing) PCR에 의해 생성된 앰플리콘들을 이용한 용융 분석(melting analysis)를 나타낸 것이다.
도 4는 20개의 SNP 부위에 대한 다중 PCR을 통해 생성된 앰플리콘들의 변성 분석을 나타낸 것이다.
Claims (10)
- 다음 단계들을 포함하고, 하기 1)의 PCR증폭단계에서 비표지 올리고뉴클레오티드 프로브를 함께 넣어주지 않고 PCR 증폭후에 따로 넣어주는 것을 특징으로 하는 DNA 용융 분석을 이용한 SNP 지노타이핑(genotyping) 방법:
1) SNP 부위를 포함하는 표적 서열을 PCR 증폭하는 단계;
2) 상기 증폭된 PCR 앰플리콘을 희석(dilution)하는 단계;
3) 상기 희석된 PCR 앰플리콘을 형광 DNA 결합 염료(dye)의 존재하에 비표지 올리뉴클레오티드 프로브(unlabeled oligonucleotide probe)와 결합시키는 단계;
4) 상기 결합된 산물의 온도를 점차 올려가면서 상기 프로브가 용융함에 따라 변해가는 형광강도를 측정(DNA 용융 분석)하는 단계,
5) 상기 온도변화에 따른 형광강도의 변화곡선의 미분곡선을 얻은뒤, SNP의 각 타입을 대표하는 피크(peak)의 존재유무에 따라 SNP를 타이핑(typing)하는 단계. - 삭제
- 제1항에 있어서, 상기 2) 단계에서 상기 PCR 앰플리콘은 증류수 또는 PCR 반응버퍼에 2~10 배 희석하는 것을 특징으로 하는 SNP 지노타이핑 방법.
- 제1항에 있어서, 상기 3) 단계에서 프로브 용액과 섞은 후 최종 PCR 산물의 희석배수가 6배 내지 96배인 것을 특징으로 하는 SNP 지노타이핑 방법.
- 제1항에 있어서, 상기 2) 단계에서 상기 PCR 앰플리콘의 희석에 의해 비표지 프로브의 결합 효율을 높이고 SNP간의 식별력(discrimination)을 높이는 것을 특징으로 하는 SNP 지노타이핑 방법
- 제1항에 있어서, 상기 3) 단계에서 probe는 특정 고상 매질에 물리 또는 화학적으로 고정되어 있는 것을 특징으로 하는 SNP 지노타이핑 방법.
- 제1항에 있어서, 상기 1) 단계에서 상기 PCR 증폭은 다중 SNPs를 한꺼번에 증폭하는 멀티플렉싱(multiplexing) PCR 인 것을 특징으로 하는 SNP 지노타이핑 방법.
- 제1항에 있어서, 상기 2) 단계에서 상기 PCR 앰플리콘의 희석에 의해 폴리머라제의 불활성화를 통해 프로브의 3’-말단 변형(modification)의 필요성을 없애는 것을 특징으로 하는 SNP 지노타이핑 방법.
- 제1항에 있어서, 상기 3) 단계에서 상기 희석된 PCR 앰플리콘을 형광 DNA 결합 염료와 상기 SNP에 상보적인 서열을 갖는 비표지 올리고뉴클레오티드 프로브 용액과 혼합한 다음, 상기 혼합물을 가열하여 이중나선 PCR 산물의 변성을 유도한후 프로브의 TM보다 낮은 온도에 방치하여 프로브가 표적 SNP 부위에 결합하도록 하는 것을 특징으로 하는 SNP 지노타이핑 방법.
- 제1항에 있어서, 상기 4) 단계에서 DNA 용융 분석은 실시간 열순환기(Realtime thermal cycler)를 이용하여 실시하는 것을 특징으로 하는 SNP 지노타이핑 방법.
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