JP2007523635A - ヌクレオチド配列情報決定法 - Google Patents
ヌクレオチド配列情報決定法 Download PDFInfo
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- JP2007523635A JP2007523635A JP2006547504A JP2006547504A JP2007523635A JP 2007523635 A JP2007523635 A JP 2007523635A JP 2006547504 A JP2006547504 A JP 2006547504A JP 2006547504 A JP2006547504 A JP 2006547504A JP 2007523635 A JP2007523635 A JP 2007523635A
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Abstract
Description
発明の領域
本発明は、一般に、検出法に関し、より具体的には、生体分子を検出し配列決定する方法に関する。
遺伝子情報は、染色体へと組織化された極めて長いデオキシリボ核酸(DNA)分子の形態で保管されている。これらの染色体は、ヒト・ゲノムを形成するおよそ30億個のヌクレオチドを含んでいる。染色体内のヌクレオチドの配列は、各個体の特徴の決定において大きな役割を果たしている。多くの一般的な疾患が、個体間のヒト・ゲノムのヌクレオチド配列の変動に、少なくとも一部、基づいている。
開示された方法は、ラマン分光法をハイブリダイゼーションによる配列決定と組み合わせることの利点の発見に、一部、基づく。ラマン分光法は、多数のラマン活性シグナル分子が既知であり(例えば、「標準的なラマン・スペクトル(Standard Raman Spectra)」(Sadtler Research Laboratories);「TRCスペクトル・データ ラマン(TRC spectral data. Raman)」(Thermodynamics Research Center)参照)、ハイブリダイゼーション・プローブによる配列決定を標識するために使用され得るという利点を提供する。多数のラマン活性シグナル分子が作成され得るため、個々の分子のサインに基づく配列決定が可能である。さらに、開示された方法は、それなしではラマン分光法により検出不可能であるか又は極めて低い強度のラマン放射を生ずるオリゴヌクレオチドを検出することを可能にする、新規のラマン・エンハンサーの発見に、一部、基づく。
アミン基の付加によるラマン強度の増強
この実施例は、アミン基をオリゴヌクレオチドと結合させることにより提供された増加した強度を例示する。オリゴヌクレオチドは、キアゲン-オペロン(Qiagen-Operon)(Alameda,CA)によりカスタム合成され、HPLC精製された。アミノ基は、当技術分野において既知の技術を使用して、合成の間又は後に、3'末端、5'末端、又は3'末端及び5'末端の両方に付加された。ラマン・シグナルは、アルゴン・イオン・レーザーにより発生される514nmの光を使用して、ラマン分光法により検出された。
蛍光対を使用した単一ヌクレオチド・ミスマッチの検出
この実施例は、標的核酸とオリゴヌクレオチド・プローブとの間の単一ヌクレオチド・ミスマッチを検出するために、蛍光対が使用される方法を例示する。オリゴヌクレオチドは、既知の方法を使用して、キアゲン-オペロンにより合成され、HPLC精製され、ROX又はTAMRAにより標識された。同時蛍光スキャンは、LS55(Perkin Elmer)を使用して実施された。ハイブリダイゼーションは、イオン強度及びpHに関して生理学的条件と類似している条件の下で実施された。より具体的には、ハイブリダイゼーションは、22℃で、100mM NaCL、10mMトリスHCl、及び1mM EDTAを含むハイブリダイゼーション反応混合物において実施された。
Claims (36)
- 標的核酸のヌクレオチド配列を決定する方法であって、
a)一本鎖突出部を含むプローブ-標的二重鎖核酸が形成されるよう、核酸又はその断片を、一連のスポット位置で基質に結合した捕獲オリゴヌクレオチド・プローブの集団と接触させること;
b)各ラマン活性オリゴヌクレオチド・プローブが別個のラマン・サインを発生するよう、ラマン・プローブの一本鎖突出部との結合を可能にするために、プローブ-標的二重鎖核酸をラマン活性オリゴヌクレオチド・プローブの集団と接触させること;
c)ラマン分光法を使用して、鋳型核酸と結合するラマン活性オリゴヌクレオチド・プローブを検出すること;及び
e)捕獲されたラマン活性オリゴヌクレオチド・プローブの各々についてスポットの位置を同定し、それにより標的核酸のヌクレオチド配列を決定すること、を含む方法。 - 各ラマン活性オリゴヌクレオチド・プローブが、検出可能なラマン・シグナルを内因的に発生するか、又はスペクトル的に別個のラマン標識もしくは正の電荷を有するエンハンサーを含む、請求項1記載の方法。
- ラマン活性オリゴヌクレオチドのうちの少なくとも一つが、正の電荷を有するエンハンサーを含む、請求項2記載の方法。
- 正の電荷を有するエンハンサーがアミン基である、請求項3記載の方法。
- ラマン活性オリゴヌクレオチドのうちの少なくとも一つが、複合有機無機ナノ粒子を含む、請求項1記載の方法。
- 決定されるヌクレオチド配列が、標的ヌクレオチド位置におけるヌクレオチド存在である、請求項1記載の方法。
- 標的位置が一塩基多型位置である、請求項6記載の方法。
- 決定されるヌクレオチド配列が、標的セグメントの隣接した位置における一連のヌクレオチド存在である、請求項1記載の方法。
- 標的セグメントが、捕獲オリゴヌクレオチド・プローブ及びラマン活性オリゴヌクレオチド・プローブの合わせた長さ以下である、請求項8記載の方法。
- 標的セグメントが、ラマン活性オリゴヌクレオチド・プローブの長さ以下である、請求項8記載の方法。
- 検出された標的配列を整列化することにより、標的核酸全体のヌクレオチド配列が決定される、請求項8記載の方法。
- 捕獲オリゴヌクレオチド・プローブを、標的核酸の隣接セグメントと結合するラマン活性オリゴヌクレオチド・プローブとライゲートさせることをさらに含む、請求項1記載の方法。
- 標的核酸が、生物学的起源から単離され、増幅されることなく捕獲オリゴヌクレオチド・プローブの集団と接触させられる、請求項1記載の方法。
- 1000分子以下のラマン活性オリゴヌクレオチド・プローブが検出される、請求項13記載の方法。
- 基質がバイオチップである、請求項1記載の方法。
- ラマン標識が、表面増強ラマン分光法(SERS)を使用して検出される、請求項1記載の方法。
- 第一のラマン活性オリゴヌクレオチド・プローブの集団が、一連のスポットの第一のスポットにおいてプローブ-標的二重鎖核酸と接触させられ、第二のラマン活性オリゴヌクレオチド・プローブの集団が、その一連のスポットの第二のスポットにおいてプローブ-標的二重鎖核酸と接触させられ、第一のラマン活性オリゴヌクレオチド・プローブの集団及び第二のラマン活性オリゴヌクレオチド・プローブの集団が、少なくとも一つの異なるオリゴヌクレオチド・プローブを含む、請求項1記載の方法。
- 第一のラマン活性オリゴヌクレオチド・プローブの集団及び第二のラマン活性オリゴヌクレオチド・プローブの集団が、異なるオリゴヌクレオチドと結合した同一のラマン標識を有するラマン・プローブを少なくとも一つ含む、請求項17記載の方法。
- a)光源を含むラマン分光計;
b)光源と光学的に連絡しているラマン活性表面;及び
c)正の電荷を有するエンハンサーと会合した検出不可能なオリゴヌクレオチド骨格を含むラマン活性オリゴヌクレオチド・プローブの集団:を含む検出系であって、ラマン活性オリゴヌクレオチド・プローブがラマン活性表面に沈着している、検出系。 - 正の電荷を有するエンハンサーがアミン基エンハンサーである、請求項19記載の方法。
- ラマン活性表面がバイオチップである、請求項19記載の方法。
- 鋳型核酸の標的ヌクレオチド位置におけるヌクレオチド存在を決定する方法であって、
a)標的ポリヌクレオチドと結合する標識されたオリゴヌクレオチド・プローブを準備すること(ここで、標識されたオリゴヌクレオチド・プローブは、第一標識及び第二標識を含み、第一標識は、第一標識の第二標識に対する配向に基づき、第二標識により発生されるラマン・スペクトル又は蛍光シグナルに影響を与える);
b)プローブ-標的複合体が形成されるよう、標識されたオリゴヌクレオチド・プローブを標的ポリヌクレオチドと接触させること;及び
c)第二標識により発生される蛍光シグナル又はラマン・スペクトルを検出すること(ここで、標的ヌクレオチド位置におけるヌクレオチド存在は、第一標識の第二標識に対する配向に影響を与え、それにより、第二標識により発生される蛍光シグナル又はラマン・スペクトルに影響を与え、標的ヌクレオチド位置におけるヌクレオチド存在の決定を可能にする)。 - 蛍光シグナルが検出される、請求項22記載の方法。
- 第一標識及び第二標識がFRET対である、請求項23記載の方法。
- 一つの標識がTAMRAであり、かつもう一つの標識がROXである、請求項24記載の方法。
- ラマン・スペクトルが検出される、請求項22記載の方法。
- 標的ポリヌクレオチドの標的ヌクレオチド位置におけるヌクレオチド発生を同定するために、検出されたラマン・スペクトルを既知のスペクトルのデータベースと比較することをさらに含む、請求項26記載の方法。
- 第一標識及び第二標識が、標識されたプローブ配列の上で約3〜6nm離れた位置にある、請求項22記載の方法。
- 一つ以上の標的ヌクレオチドについての一連のヌクレオチド存在が、標識されたプローブの集団を使用して決定される、請求項22記載の方法。
- プローブ-標的複合体が、プローブ-標的複合体により発生される蛍光シグナル又はラマン・スペクトルを読み取るための光学検出器に個々に通される、請求項29記載の方法。
- 個々のプローブ-標的複合体が、一つのプローブ-標的複合体のみが通過することを可能にする十分に狭いチャンネルを有している微小電気機械システムを使用して、光学検出器に個々に通される、請求項29記載の方法。
- 標的ポリヌクレオチド及び標識されたプローブが標的ヌクレオチド位置において相補的なヌクレオチドを含むか否かに依る、第二プローブの蛍光シグナル又はラマン・スペクトルに対する第一プローブの影響の差違を増強するため、プローブを検出する前に、交流(AC)がプローブ-標的複合体に適用される、請求項22記載の方法。
- 核酸を検出する方法であって、
a)正の電荷を有するエンハンサーを含む核酸に光を照射すること;及び
b)照射された核酸により発生されるラマン・シグナルを検出すること:を含む方法。 - 正の電荷を有するエンハンサーがアミン基である、請求項33記載の方法。
- 核酸が、正の電荷を有するエンハンサーなしでは、検出可能なシグナルを発生しない、請求項33記載の方法。
- 核酸がピリミジン残基からなる、請求項33記載の方法。
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| EP1711624A2 (en) | 2006-10-18 |
| US20050147976A1 (en) | 2005-07-07 |
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| WO2005066370A2 (en) | 2005-07-21 |
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| CN1898398B (zh) | 2014-07-30 |
| JP4959341B2 (ja) | 2012-06-20 |
| US20070031861A1 (en) | 2007-02-08 |
| KR20070004602A (ko) | 2007-01-09 |
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