JP6744917B2 - バリアント検出のための方法 - Google Patents
バリアント検出のための方法 Download PDFInfo
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- JP6744917B2 JP6744917B2 JP2018526848A JP2018526848A JP6744917B2 JP 6744917 B2 JP6744917 B2 JP 6744917B2 JP 2018526848 A JP2018526848 A JP 2018526848A JP 2018526848 A JP2018526848 A JP 2018526848A JP 6744917 B2 JP6744917 B2 JP 6744917B2
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Description
アレルのコピー数=2*(2^(ΔΔCq))
Claims (21)
- 標的DNA配列におけるバリエーションを検出する方法であって、
(a)反応混合物を提供するステップであって、該反応混合物は、(i)ブロッキング基の5’およびバリエーションの部位の3’に位置する切断ドメインを有するオリゴヌクレオチドプライマーであって、該ブロッキング基は、オリゴヌクレオチドプライマーの3’端の末端またはその近くに結合されており、プライマー伸長を阻止するおよび/またはプライマーがDNA合成のためのテンプレートとして働くのを阻害し、該切断ドメインは、1個のRNA塩基を含み、そして該バリエーションの部位は、該RNA塩基の1〜2塩基5’に配置される、オリゴヌクレオチドプライマーと、(ii)標的配列を有していてもよいしまたは有していなくてもよい核酸サンプルであって、該標的配列は、バリエーションを有していてもよいしまたは有していなくてもよい、核酸サンプルと、(iii)切断酵素と、(iv)ポリメラーゼであって、該ポリメラーゼは高識別ポリメラーゼである、ポリメラーゼとを含む、ステップ;
(b)プライマーを標的DNA配列にハイブリダイズさせて二本鎖基質を形成させるステップ;
(c)プライマーがバリエーションにおいて相補的である場合に、ハイブリダイズしたプライマーを、切断ドメイン内のまたはそれに隣接した位置で切断酵素で切断して、ブロッキング基をプライマーから除去するステップ;および
(d)プライマーをポリメラーゼで伸長させるステップ
を含む前記方法。 - プライマーは、ユニバーサルプライマー配列および場合によりユニバーサルプローブ配列を含む5’テール配列を含み、該テールは、標的DNA配列と非相補的である、請求項1に記載の方法。
- 標的濃縮の方法であって、
(a)反応混合物を提供するステップであって、該反応混合物は、(i)標的配列と相補的でないテールドメインと、ブロッキング基の5’およびバリエーションの部位の3’に位置する切断ドメインとを有する第1のオリゴヌクレオチドプライマーであって、該テ
ールドメインは、第1のユニバーサルプライマー配列を含み、該ブロッキング基は、第1のオリゴヌクレオチドプライマーの3’端の末端またはその近くに結合されており、プライマー伸長を阻止するおよび/または第1のプライマーがDNA合成のためのテンプレートとして働くのを阻害し、該切断ドメインは、1個のRNA塩基を含み、そして該バリエーションの部位は、該RNA塩基の1〜2塩基5’に配置される、第1のオリゴヌクレオチドプライマーと、(ii)標的配列を有するまたは有さない核酸サンプルと、(iii)切断酵素と、(iv)ポリメラーゼであって、該ポリメラーゼは高識別ポリメラーゼである、ポリメラーゼとを含む反応混合物を提供するステップ;
(b)第1のプライマーを標的DNA配列にハイブリダイズさせて二本鎖基質を形成させるステップ;
(c)第1のプライマーが標的と相補的である場合に、ハイブリダイズした第1のプライマーを、切断ドメイン内のまたはそれに隣接した位置で切断酵素で切断して、ブロッキング基を第1のプライマーから除去するステップ;および
(d)第1のプライマーをポリメラーゼで伸長させるステップ
を含む前記方法。 - 方法は、第1のプライマー伸長産物のプライミングおよび伸長を支持するためのリバース方向の第2のプライマーをさらに含む、請求項3に記載の方法。
- 第2のプライマーは、第2のユニバーサルプライマー配列を含むテールドメインをさらに含む、請求項4に記載の方法。
- 工程b〜dは、1〜10回実行される、請求項3〜5のいずれか1項に記載の方法。
- 未伸長プライマーを反応物から除去することと、ユニバーサルプライマーを伸長産物にハイブリダイズさせて第2の伸長産物を形成することとをさらに含む、請求項3〜6のいずれか1項に記載の方法。
- ユニバーサルプライマーは、アダプター配列を第2の伸長産物に付加するためのテール付きの配列をさらに含む、請求項7に記載の方法。
- シークエンシングは、標的の配列を決定するために第2の伸長産物上で行われる、請求項8に記載の方法。
- 標的DNA配列は、遺伝子編集酵素で処理されたサンプルである、請求項1〜9のいずれか1項に記載の方法。
- 標的DNA配列は、CRISPR酵素で処理されたサンプルである、請求項1〜10のいずれか1項に記載の方法。
- 標的DNA配列は、Cas9またはCpf1酵素で処理されたサンプルである、請求項1〜11のいずれか1項に記載の方法。
- 切断酵素は、耐熱性であり、より低い温度で低下した活性を有するホットスタート切断酵素である、請求項1〜12のいずれか1項に記載の方法。
- 切断酵素は、耐熱性であり、より低い温度で低下した活性を有する化学的に改変されたホットスタート切断酵素である、請求項1〜13のいずれか1項に記載の方法。
- ホットスタート切断酵素は、化学的に改変されたPyrococcus abyssi
のRNアーゼH2である、請求項1〜14のいずれか1項に記載の方法。 - 切断酵素は、耐熱性であり、より低い温度で低下した活性を有する、より低い温度で抗体との相互作用を通して可逆的に不活化されるホットスタート切断酵素である、請求項1〜15のいずれか1項に記載の方法。
- 切断ドメインは、少なくとも1個のRNA塩基で構成されており、切断酵素は、バリエーションに相補的な部位と該RNA塩基との間を切断する、請求項1〜16のいずれか1項に記載の方法。
- 切断ドメインは、1個またはそれ以上の2’−改変ヌクレオシドで構成されており、切断酵素は、バリエーションに相補的な部位と1個またはそれ以上の該改変ヌクレオシドとの間を切断する、請求項1〜17のいずれか1項に記載の方法。
- 1個またはそれ以上の改変ヌクレオシドは、2’−フルオロヌクレオシドである、請求項18に記載の方法。
- ポリメラーゼは、変異型H784Q Taqポリメラーゼである、請求項1〜19のいずれか1項に記載の方法。
- 変異型H784Q Taqポリメラーゼは、化学改変、アプタマー改変または抗体改変を介して可逆的に不活化される、請求項20に記載の方法。
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CN113981069B (zh) * | 2021-11-10 | 2023-08-15 | 郑州华沃生物科技有限公司 | 检测adrb1基因g1165c多态性的引物、试剂盒及其检测方法和应用 |
CN114182003B (zh) * | 2022-01-11 | 2024-06-25 | 杭州百迈生物股份有限公司 | 用于cyp3a5多态性位点基因分型检测的试剂盒及其检测方法 |
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CN115948388A (zh) * | 2022-12-30 | 2023-04-11 | 纳昂达(南京)生物科技有限公司 | 特异性捕获引物、靶向捕获探针组合物、靶向捕获文库的构建方法及应用 |
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AU2014205110A1 (en) | 2013-01-13 | 2015-08-27 | Unitaq Bio | Methods and compositions for PCR using blocked and universal primers |
AU2014348323B2 (en) * | 2013-11-14 | 2020-09-24 | Integrated Dna Technologies, Inc. | DNA polymerase mutants having enhanced template discrimination activity |
US20210395799A1 (en) | 2015-11-25 | 2021-12-23 | Integrated Dna Technologies, Inc. | Methods for variant detection |
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US20170145486A1 (en) | 2017-05-25 |
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