JP6560336B2 - 核酸分子の構築方法 - Google Patents
核酸分子の構築方法 Download PDFInfo
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- JP6560336B2 JP6560336B2 JP2017502514A JP2017502514A JP6560336B2 JP 6560336 B2 JP6560336 B2 JP 6560336B2 JP 2017502514 A JP2017502514 A JP 2017502514A JP 2017502514 A JP2017502514 A JP 2017502514A JP 6560336 B2 JP6560336 B2 JP 6560336B2
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Description
[1]ナノポアシーケンサによる核酸配列決定の為の一本鎖核酸分子の構築方法であって、
3'側に一本鎖領域を含む少なくとも一つのヘアピンプライマーと、該ヘアピンプライマーと対をなすプライマーとを用いて標的配列を含む鋳型DNAの相補鎖を合成する工程と、
合成された相補鎖が分子内にヘアピン構造を形成して自己を鋳型に伸長反応を行うようにする工程と
を含み、得られた核酸分子が標的配列及びその相補鎖の双方を配列中に含むものである、上記方法。
[2]前記ヘアピンプライマーのステム部が、前記一本鎖部のTm値より高いTm値を有する、[1]に記載の方法。
[3]反応の進行によるヘアピンプライマーの減少と共に、合成された相補鎖配列が自己を鋳型に伸長反応を行う、[1]に記載の方法。
[4]ヘアピンプライマーの5'末端を使用前にリン酸化し、目的の核酸分子の構築後に5'末端がリン酸化したDNA鎖を分解する工程を更に含む、[1]に記載の方法。
[5]λエキソヌクレアーゼを使用して前記分解を行う、[4]に記載の方法。
[6]5'末端がリン酸化したDNA鎖の分解後、その相補鎖の3'末端からヘアピン構造を介して自己アニールする伸長反応を行う、[4]に記載の方法。
[7]ヘアピンループ構造をもつアダプタを前記生成物と連結し、鎖置換反応を行って核酸分子を伸長させる工程を更に含む、[1]に記載の方法。
[8]ヘアピンループ構造をもつアダプタを前記生成物と連結し、鎖置換反応を行って核酸分子を伸長させる、[6]に記載の方法。
[9]前記対をなすプライマーから形成された末端を固定化し、相補鎖DNAを解離させた後に伸長反応を行う、[1]に記載の方法。
[10]前記アダプタのループ構造部が、伸長反応阻害分子を含む、[7]又は[8]に記載の方法。
[11]前記対をなすプライマーがDNAとRNAのキメラ構造を有し、伸長反応後にRNAを分解する工程を更に含む、[1]に記載の方法。
[12][1]に記載の方法によって得られた核酸分子の塩基配列をナノポアシーケンサによって解析することを含む、核酸塩基配列決定方法。
[13]配列決定工程において、核酸分子中に含まれる既知の塩基配列から得られる信号を元に検出器の校正を行う、[12]に記載の方法。
[14]配列決定工程において、核酸分子中に含まれる既知の塩基配列から得られる信号を元に解析を行う、[12]に記載の方法。
[15]二本鎖形成した反応物を用い、ナノポアを通過する反応物の速度を制御する、[12]に記載の方法。
[16]前記ヘアピンプライマーがランダム配列を有する、[1]に記載の方法。
[17]前記ヘアピンプライマーが前記標的配列の変異の数以上のランダム配列種を有する、[16]に記載の方法。
20mM Tris-HCl (pH8.5)
50mM KCl
2mM MgCl2
200μM 各dNTP
5U Pfuexo-DNAポリメラーゼ (3’-5’エキソヌクレアーゼ活性を持たないポリメラーゼ)
と調製し、以下の温度条件で合成反応を行う。
20mM Tris-HCl (pH8.5)
50mM KCl
2mM MgCl2
200μM 各dNTP
5U Pfuexo-DNAポリメラーゼ(3’-5’エキソヌクレアーゼ活性のないポリメラーゼ)
以下の温度条件で反応を行う。
20mM Tris-HCl (pH8.5)
50mM KCl
2mM MgCl2
200μM 各dNTP
5U Pfuexo-DNAポリメラーゼ(3’-5’エキソヌクレアーゼ活性のないポリメラーゼ)
上記の組成で以下の温度条件で反応を行う。94℃で5分の加熱で高次構造をほぐす。その後95℃で30秒、60℃で45秒により3’末端の相補鎖をもつ配列箇所がアニールすることによりヘアピン構造を構築し、72℃で90秒以上の加熱により伸長反応を行う。この反応は、上記に示した反応条件に限定されない。標的とする配列やヘアピン構造の配列により温度、時間、サイクル等は変えてもよい。
101 光源
102 対物レンズ
103 顕微鏡観察容器
104 XYステージ
105 Z軸調整機構
106 フィルタ
107 ビームスプリッター
108 回折格子
109 検出器
110 LED
111 二次元検出器
112 ミラー
113 多重照射機構
114 レンズ
115 駆動制御部
116 コンピュータ
117 NIR(近赤外)ミラー
201 観察容器
202 ナノポア
203 基板
204 試料導入区画
205 試料流出区画
206 流入路
207 流入路
208 流出路
209 流出路
210 液体
211 液体
212 試料
213 電極
214 電極
215 導電性薄膜
216 液浸媒体
217 対物レンズ
300 ヘアピンプライマー
300a ヘアピンプライマー300の伸長産物
301 ヘアピン構造を形成させる相補鎖配列部
302 ヘアピンプライマーにおける相補鎖配列部
303 プライマー
303a プライマー303の伸長産物
303b プライマー303の伸長産物
303c プライマー303の伸長産物
303d プライマー303の伸長産物
601 ヘアピンアダプタ
701 AT(アデニンとチミン)の配列に富んだ配列
801 ランダム配列
802 ランダム配列の相補配列
803 異なるランダム配列を有するヘアピンプライマー
804 異なるランダム配列を有するヘアピンプライマー
805 異なるランダム配列を有するヘアピンプライマー
901 ランダム配列
902 核酸分子01〜05で共通して異なる塩基
Claims (16)
- 核酸分子の構築方法であって、
3'側に一本鎖領域を含む少なくとも一つのヘアピンプライマーと、対をなすプライマーとを、標的配列を含む鋳型DNA及びその相補鎖からなる対象核酸にそれぞれアニールさせて伸長反応を行う工程と、
伸長した第1の二本鎖の増幅産物を変性条件下で解離させたのちに該ヘアピンプライマー及び該対をなすプライマーに再度アニールさせて伸長反応を行い、該ヘアピンプライマーのループ部の配列を含む第2の二本鎖の増幅産物を得る工程と、
該第2の二本鎖の増幅産物を変性条件で解離させたのちに、3'末端にヘアピン構造を有する一本鎖核酸を形成させる工程と、
該一本鎖核酸が自己を鋳型に伸長反応を行うようにする工程と
を含み、生成物となる得られた核酸分子が標的配列及びその相補鎖の双方を配列中に含むものであり、
前記ヘアピンプライマーのステム部が、一本鎖部のTm値より高いTm値を有する、上記方法。 - 反応の進行によるヘアピンプライマーの減少と共に、合成された相補鎖配列が自己を鋳型に伸長反応を行う、請求項1に記載の方法。
- 核酸分子の構築方法であって、
5'末端がリン酸化され、かつ3'側に一本鎖領域を含む少なくとも一つのヘアピンプライマーと、対をなすプライマーとを、標的配列を含む鋳型DNA及びその相補鎖からなる対象核酸にそれぞれアニールさせて伸長反応を行う工程と、
伸長した第1の二本鎖の増幅産物を変性条件下で解離させたのちに該ヘアピンプライマー及び該対をなすプライマーに再度アニールさせて伸長反応を行い、該ヘアピンプライマーのループ部の配列を含む第2の二本鎖の増幅産物を得る工程と、
該第2の二本鎖の増幅産物を変性条件で解離させたのちに、3'末端にヘアピン構造を有する一本鎖核酸を形成させる工程と、
該一本鎖核酸が自己を鋳型に伸長反応を行うようにして標的配列及びその相補鎖の双方を配列中に含む核酸分子を構築する工程と
該核酸分子の構築後に5'末端がリン酸化したDNA鎖を分解する工程と
を含む、上記方法。 - λエキソヌクレアーゼを使用して前記分解を行う、請求項3に記載の方法。
- 前記対をなすプライマーから形成された末端を固定化し、相補鎖DNAを解離させた後に伸長反応を行う、請求項1に記載の方法。
- 5'末端がリン酸化したDNA鎖の分解後、その相補鎖の3'末端からヘアピン構造を介して自己アニールする伸長反応を行う、請求項3に記載の方法。
- ヘアピンループ構造をもつアダプタを前記生成物と連結し、鎖置換反応を行って核酸分子を伸長させる、請求項6に記載の方法。
- 核酸分子の構築方法であって、
3'側に一本鎖領域を含む少なくとも一つのヘアピンプライマーと、対をなすプライマーとを、標的配列を含む鋳型DNA及びその相補鎖からなる対象核酸にそれぞれアニールさせて伸長反応を行う工程と、
伸長した第1の二本鎖の増幅産物を変性条件下で解離させたのちに該ヘアピンプライマー及び該対をなすプライマーに再度アニールさせて伸長反応を行い、該ヘアピンプライマーのループ部の配列を含む第2の二本鎖の増幅産物を得る工程と、
該第2の二本鎖の増幅産物を変性条件で解離させたのちに、3'末端にヘアピン構造を有する一本鎖核酸を形成させる工程と、
該一本鎖核酸が自己を鋳型に伸長反応を行うようにして標的配列及びその相補鎖の双方を配列中に含む核酸分子を構築する工程と、
ヘアピンループ構造をもつアダプタを前記生成物と連結し、鎖置換反応を行って核酸分子を伸長させる工程と
を含む、上記方法。 - 前記アダプタのループ構造部が、伸長反応阻害分子を含む、請求項7又は8に記載の方法。
- 前記対をなすプライマーがDNAとRNAのキメラ構造を有し、伸長反応後にRNAを分解する工程を更に含む、請求項1に記載の方法。
- 3'側に一本鎖領域を含む少なくとも一つのヘアピンプライマーと、対をなすプライマーとを、標的配列を含む鋳型DNA及びその相補鎖からなる対象核酸にそれぞれアニールさせて伸長反応を行い、
伸長した第1の二本鎖の増幅産物を変性条件下で解離させたのちに該ヘアピンプライマー及び該対をなすプライマーに再度アニールさせて伸長反応を行い、該ヘアピンプライマーのループ部の配列を含む第2の二本鎖の増幅産物を得、
該第2の二本鎖の増幅産物を変性条件で解離させたのちに、3'末端にヘアピン構造を有する一本鎖核酸を形成させ、
該一本鎖核酸が自己を鋳型に伸長反応を行うようにして、標的配列及びその相補鎖の双方を配列中に含む一本鎖核酸分子を構築し、
該一本鎖核酸分子の塩基配列をシーケンサによって解析する
ことを含む、核酸塩基配列決定方法。 - 配列決定工程において、核酸分子中に含まれる既知の塩基配列から得られる信号を元に検出器の校正を行う、請求項11に記載の方法。
- 配列決定工程において、核酸分子中に含まれる既知の塩基配列から得られる信号を元に解析を行う、請求項11に記載の方法。
- 二本鎖形成した反応物を用い、シーケンサによる解析における検出場を通過する反応物の速度を制御する、請求項11に記載の方法。
- 前記ヘアピンプライマーがランダム配列を有する、請求項1に記載の方法。
- 前記ヘアピンプライマーが前記標的配列の変異の数以上のランダム配列種を有する、請求項15に記載の方法。
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US9116118B2 (en) * | 2012-06-08 | 2015-08-25 | Pacific Biosciences Of California, Inc. | Modified base detection with nanopore sequencing |
CA2886605A1 (en) * | 2012-09-28 | 2014-04-03 | Cepheid | Two-primer pcr for microrna multiplex assay |
CN107541546B (zh) * | 2012-10-15 | 2021-06-15 | 生命技术公司 | 用于标靶核酸富集的组合物、方法、系统和试剂盒 |
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GB2550712A (en) | 2017-11-29 |
US20180030506A1 (en) | 2018-02-01 |
GB2550712B (en) | 2021-01-13 |
CN107208162B (zh) | 2020-12-29 |
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