JP6289610B2 - 単一ヌクレオチド検出方法 - Google Patents
単一ヌクレオチド検出方法 Download PDFInfo
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- JP6289610B2 JP6289610B2 JP2016507057A JP2016507057A JP6289610B2 JP 6289610 B2 JP6289610 B2 JP 6289610B2 JP 2016507057 A JP2016507057 A JP 2016507057A JP 2016507057 A JP2016507057 A JP 2016507057A JP 6289610 B2 JP6289610 B2 JP 6289610B2
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- oligonucleotide
- stranded
- nucleotide
- capture system
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Description
下記の実験は、第1オリゴヌクレオチドがj形状であり、第2オリゴヌクレオチドが一本鎖である捕捉システムを用いる、単一ヌクレオチド塩基の捕捉およびフルオロフォアの解放について例示する。
gtaggtcctggcacagagaaaaggagGcagtgatgttccatgactgatttttttttcagtcatggaacatcact*g
を有する75ヌクレオチド塩基、一本鎖オリゴヌクレオチドを折り畳むことにより調製され、配列中、g、t、c、およびaは、DNAのヌクレオチド塩基の従来の概念を示し、*は、ホスホロチオ酸結合の存在を示す。折り畳みは、このオリゴヌクレオチドの水性溶液を95℃まで加熱した後、1℃当たり10分の速度でゆっくり室温まで冷却することにより行われる。こうして得られたj形状分子は、捕捉部位(上記配列中の大文字)である単一ヌクレオチド塩基に結合した残った一本鎖オリゴヌクレオチド領域(gtaggtcctggcacagaaaaaaggag)を備える。
^ctccTTXTTtctgtgccaga
を有する対応する一本鎖オリゴヌクレオチドも調製され、配列中、^は、5’リン酸基を表し、大文字のTは、アジド結合剤によってAlexa Fluor 488染料で標識されたチミン塩基を表し、Xは、BHQ−1クエンチャで標識されたチミン塩基を表す。
2.5μlの10×バッファーII
5μlの10×Taqリガーゼバッファー(NEB)
2.5μlの100nMの上記j形状分子
5μlの100nMの上記一本鎖オリゴヌクレオチド
2μlの熱安定無機ピロホスファターゼ(NEB)
5μlのTaqリガーゼ(NEB)
1μlの25mMのMnSO4
25μlの水
から誘導されるものに対応する組成を有し、ヌクレオチド塩基混合物の組成は、加ピロリン酸分解ステップから得られた材料を模倣するよう設計され、配合組成:
2.5μlの10バッファーII(Amplitaqを含み、マグネシウムを含まない)
1.5μlの25mMのMgCl2
2.5μlの10nMのデオキシシチジン三リン酸(dCTP)
2μlのAmplitaq(5U/μl)
2.5μlの10mMのピロリン酸ナトリウム
25μlの水
から誘導されるものに対応する。
図1は、それぞれ単一ヌクレオチド塩基を含有する微小液滴を上述したようなタイプの捕捉システムと反応させるマイクロ流体配列決定装置を概略的に例示するものである。
Claims (21)
- (1)加ピロリン酸分解酵素の存在下の漸進的加ピロリン酸分解により、分析物から単一ヌクレオチド塩基三リン酸のストリームを生成するステップ;(2)各単一ヌクレオチド塩基三リン酸を、ポリメラーゼ及びリガーゼの存在下、捕捉システムと反応させることにより捕捉分子を生成するステップ、ここで、前記捕捉システムは(i)(a)二本鎖領域および一本鎖領域を備える第1オリゴヌクレオチド、ならびに(b)そのヌクレオチド塩基配列が前記第1オリゴヌクレオチドの一本鎖領域のそれに少なくとも部分的に相補的である第2一本鎖オリゴヌクレオチド;又は(ii)その末端が2つの異なる二本鎖オリゴヌクレオチド領域に結合した一本鎖ヌクレオチド領域を備える単一オリゴヌクレオチド、のいずれかを含む;(3)前記捕捉分子の少なくとも一部を増幅させ、単一ヌクレオチド塩基三リン酸に特徴的な複数のアンプリコンを生成するステップ;(4)前記アンプリコンを、特徴的な検出可能要素を有する対応プローブで標識するステップ;および(5)前記検出可能要素に特徴的な特性を検出するステップ、により特徴づけられる、ポリヌクレオチド分析物中のヌクレオチド塩基の配列を決定する方法。
- 前記ストリーム中のヌクレオチド塩基の順序が、分析物中のヌクレオチド塩基配列に対応することを特徴とする、請求項1に記載の方法。
- 前記捕捉システム(i)が、ヌクレオチド塩基三リン酸の各タイプの2つの成分を備えることを特徴とする、請求項1または請求項2に記載の方法。
- 前記捕捉システム(ii)が、ヌクレオチド塩基三リン酸の各タイプの単一オリゴヌクレオチドを備えることを特徴とする、請求項1または2に記載の方法。
- 前記ポリヌクレオチド分析物が、表面に結合されることを特徴とする、請求項1〜4のいずれかに記載の方法。
- ステップ(1)の反応条件下で、前記加ピロリン酸分解酵素が、エキソヌクレアーゼ挙動もエンドヌクレアーゼ挙動も示さないことを特徴とする、請求項1に記載の方法。
- ステップ(1)が、加ピロリン酸分解酵素、ピロリン酸アニオンおよびマグネシウムカチオンを含む流動水性媒体の存在下で非平衡条件下で行われ、単一ヌクレオチド塩基が、それらが生成される反応ゾーンから連続的に除去されることを特徴とする、請求項1〜6のいずれかに記載の方法。
- ステップ(1)および(2)の間に、残留ピロリン酸アニオンが、ピロホスファターゼによりすべて破壊されることを特徴とする、請求項1〜7のいずれかに記載の方法。
- 捕捉システム(i)において、前記第1オリゴヌクレオチドがj形状であることを特徴とする、請求項1〜3および5〜8のいずれかに記載の方法。
- 捕捉システム(i)において、前記第1オリゴヌクレオチドの全長が、20〜100ヌクレオチド塩基であることを特徴とする、請求項1〜3および5〜9のいずれかに記載の方法。
- 前記捕捉システム(i)が、4つの異なる第1オリゴヌクレオチド中の4つの異なる一本鎖領域の1つの一部に相補的な配列をそれぞれ有する4つの異なる第2オリゴヌクレオチドタイプを備えることを特徴とする、請求項1〜3および5〜10のいずれかに記載の方法。
- 前記捕捉システム(ii)において、各二本鎖オリゴヌクレオチド領域が、10〜30ヌクレオチド対からなることを特徴とする、請求項1、2および4〜8のいずれか1項に記載の方法。
- 前記捕捉システム(ii)において、それぞれクローズドループである一本鎖ヌクレオチド領域から離れた末端を備える2つの別々の二本鎖オリゴヌクレオチド領域が用いられることを特徴とする、請求項1、2、4〜8および12のいずれか1項に記載の方法。
- 前記捕捉システム(ii)において、前記二本鎖オリゴヌクレオチド領域が、一本鎖オリゴヌクレオチド前駆体から、その末端を折り畳み、前記一本鎖ヌクレオチド領域からなるギャップをもたらすことにより誘導可能であることを特徴とする、請求項1、2、4〜8、12および13のいずれか1項に記載の方法。
- 前記捕捉システムが、各タイプが異なるヌクレオチド塩基に選択的である少なくとも2つの異なる捕捉システムタイプを備えることを特徴とする、請求項1〜14のいずれかに記載の方法。
- ステップ(3)および(4)が同時に行われることを特徴とする、請求項1〜15のいずれかに記載の方法。
- ステップ(3)の増幅がポリメラーゼ連鎖反応、リコンビナーゼポリメラーゼ増幅およびローリングサークル増幅から選択される方法を用いて行われることを特徴とする、請求項1〜16のいずれかに記載の方法。
- ステップ(2)で用いられるリガーゼが、ステップ(4)を行う前に不活性化されることを特徴とする、請求項1〜17のいずれかに記載の方法。
- ステップ(4)で用いられる前記プローブが、分子ビーコンおよびスコーピオンプローブから選択されることを特徴とする、請求項1〜18のいずれかに記載の方法。
- ステップ(5)が、活性化プローブ上でフルオロフォアにより発光される蛍光を検出することを含むことを特徴とする、請求項1〜19のいずれかに記載の方法。
- ステップ(1)〜(5)の少なくとも1つが、微小液滴中で行われることを特徴とする、請求項1〜20のいずれか1項に記載の方法。
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GBGB1306445.6A GB201306445D0 (en) | 2013-04-09 | 2013-04-09 | Single nucleotide detection method |
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PCT/GB2014/051106 WO2014167324A1 (en) | 2013-04-09 | 2014-04-09 | Single nucleotide detection method |
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US10130438B2 (en) | 2013-01-30 | 2018-11-20 | Exsomed International IP, LLC | Surgical glove with ergonomic features |
US9622523B2 (en) | 2014-01-06 | 2017-04-18 | Exsomed International IP, LLC | Ergonomic work gloves |
GB201402644D0 (en) | 2014-02-14 | 2014-04-02 | Base4 Innovation Ltd | Methylation detection method |
GB201412977D0 (en) * | 2014-07-22 | 2014-09-03 | Base4 Innovation Ltd | Single nucleotide detection method |
GB201501012D0 (en) * | 2015-01-21 | 2015-03-04 | Base4 Innovation Ltd | Improved droplet sequencing apparatus and method |
EP3207982A1 (en) | 2016-02-17 | 2017-08-23 | Base4 Innovation Limited | Improved droplet sequencing apparatus and method |
EP3211092B1 (en) | 2016-02-24 | 2019-03-27 | Base4 Innovation Ltd | Single nucleotide detection method |
CN109790572A (zh) | 2016-09-02 | 2019-05-21 | 贝斯4创新公司 | 单核苷酸检测方法及相关探针 |
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AU673245B2 (en) * | 1993-02-01 | 1996-10-31 | Seq, Ltd. | Methods and apparatus for DNA sequencing |
US6268146B1 (en) * | 1998-03-13 | 2001-07-31 | Promega Corporation | Analytical methods and materials for nucleic acid detection |
US6515120B1 (en) * | 1999-05-25 | 2003-02-04 | Praelux Incorporated | Method for sequencing and characterizing polymeric biomolecules using aptamers and a method for producing aptamers |
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EP2828409A1 (en) | 2015-01-28 |
JP2016519576A (ja) | 2016-07-07 |
WO2014167324A1 (en) | 2014-10-16 |
CA2907868C (en) | 2017-08-22 |
US20160040223A1 (en) | 2016-02-11 |
KR101766657B1 (ko) | 2017-08-23 |
AU2014252805B2 (en) | 2017-01-05 |
ES2559108T3 (es) | 2016-02-10 |
CA2907868A1 (en) | 2014-10-16 |
EP2828409B1 (en) | 2015-10-14 |
DK2828409T3 (en) | 2015-12-07 |
GB201306445D0 (en) | 2013-05-22 |
US10480024B2 (en) | 2019-11-19 |
CN105121662B (zh) | 2017-03-22 |
BR112015025763A2 (pt) | 2017-10-17 |
AU2014252805A1 (en) | 2015-10-15 |
KR20150143614A (ko) | 2015-12-23 |
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