JP5421112B2 - 2’−終止関連の加ピロリン酸分解活性化された重合 - Google Patents
2’−終止関連の加ピロリン酸分解活性化された重合 Download PDFInfo
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- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/26—Preparation of nitrogen-containing carbohydrates
- C12P19/28—N-glycosides
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- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
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- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
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- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6876—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes
- C12Q1/6883—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for diseases caused by alterations of genetic material
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Description
本発明を詳細に説明する前提として、本発明が特定の方法、反応混合物又は系に限定されるものではなく、変更を加え得ると解すべきである。本明細書及び添付の特許請求の範囲において、単数形「一」及び「前記」(“a”“an”及び“the”)は、文脈から明らかに異なる場合を除き、複数の対象も包含する。また、本明細書で用いる用語は、特定の態様を記載する目的のみに供され、限定を意図するものではないと解すべきである。また、別途定義しない限り、本明細書で用いられる全ての技術用語及び科学用語は、当業者が通常理解するのと同じ意味を有する。本発明を記載及び請求するに当たって、以下の用語法及びその分法上の活用形は、以下に示す定義に従って使用するものとする。
本発明は、2’−終止ヌクレオチドを、通常それらの3’末端で含み、従って、ブロックされるオリゴヌクレオチドについての種々の適用に関する。すなわち、2’−終止ヌクレオチドは通常、本明細書に言及される1又は2以上の生体触媒により伸長を妨げる。しかしながら、それらの遮断オリゴヌクレオチドは通常、それらが、2’−終止ヌクレオチドが除去される場合、伸長され得るので、「活性化性」である。ある態様によれば、本明細書に記載のオリゴヌクレオチドは、単純には核酸重合の逆反応である、加ピロリン酸分解を通して活性化される。より具体的には、ピロリン酸の存在下で、2’−終止ヌクレオチドは、重合反応において伸長され得る。ヌクレオシド三リン酸及び3’末端短縮オリゴヌクレオチドを生成するために重複核酸から除去され得る。PAP−関連の用途における加ピロリン酸分解及び重合の一連のカップリングは通常、加ピロリン酸分解活性化を欠いている工程に関する改良された特異性を提供する。なぜならば、PAP条件下での非特異的増幅は、稀な現象である、生体触媒によるミスマッチ加ピロリン酸分解及び誤取り込みの両者を必要とするからである。さらに、本明細書に記載される一定の酵素生体触媒のプルーフリーディング3’−5’エキソヌクレアーゼ活性は驚くべきことには、プライマーが溶液に存在するか、又は対応する鋳型核酸にアニーリングされる場合、本明細書に記載されるプライマーからブロッキング基を除去しない(すなわち、プライマーを活性化する)。従って、それらの酵素のプルーフリーディング活性は通常、プルーフリーディング活性を欠いている酵素を使用する種々の先存するPAP−関連のアプローチよりも、プライマー伸長産物のより高い適合度の合成を提供する。この開示に例示されるように、本明細書に記載される遮断オリゴヌクレオチドは、実質的にいずれかの重合又は増幅工程、例えば当業者に明らかであろう多くの他の用途の中で、SNP分析及び希少体細胞突然変異検出に使用され得る。
本発明は、2’−終止ヌクレオチドを含むオリゴヌクレオチド(すなわち、2’−終止遮断オリゴヌクレオチド)の使用を包含する、方法、反応混合物、系及び他の態様に関する。オリゴヌクレオチド合成及び関連する核酸合成試薬がさらに下記に記載されている。例を挙げると、本発明の種々の態様に使用されるヌクレオチドは通常、無傷の糖環の3’−位置でヒドロキシル基、及び糖成分の2’−位置でブロッキング基(例えば負に荷電されたブロッキング基、粗大ブロッキング基及び/等)を含む。本明細書に記載される一定の生体触媒は、鋳型指示された態様で、それらの2’−終止ヌクレオチドによるプライマー核酸の伸長能力を包含する。プライマー核酸の3’末端での2’−終止ヌクレオチドの導入に基づいて、核酸は通常、生体触媒により非伸長性にされる。さらに、いくつかの生体触媒は、例えば加ピロリン酸分解を通してオリゴヌクレオチドから2’−終止ヌクレオチドを除去する能力を含む。2’−終止ヌクレオチド、2’−終止遮断オリゴヌクレオチド、合成及び/又は関連する生体触媒に関連する追加の詳細は、例えば2006年10月18日にBauer等により出願された、“MUTANT DNA POLYMERASES AND RELATED METHODS”、米国特許出願番号第60/852882号、2004年6月29日にBodepudi等により出願された、“SYNTHESIS AND COMPOSITIONS OF NUCLEIC ACIDS COMPRISING 2’-TERMINATOR NUCLEOSIDES”、国際出願番号第WO2005/026184号、2004年6月28日にGelfand等により出願された、“2’-TERMINATOR NUCLEOTIDE-RELATED METHODS AND SYSTEMS”、米国特許出願番号第10/879,493号及び2004年6月28日にBodepudi等により出願された、“Synthesis and compositions of 2'-terminator nucleotides”、米国特許出願番号第10/879,494号にも記載される。
水素結合又は塩基スタッキング機構を通して、別の核酸と塩基対合することができる実質的にいずれかの複素環式環又はアリール基(すなわち、塩基又はB基として)が任意には、2’−終止ヌクレオシド又はヌクレオチドの糖成分の1’位置で含まれる。従って、使用する可能性ある基のすべてを本明細書に記載することはそまお。しかし、特定の代表的B基を例示のために下記に提供する。ある態様によれば、例えばBは、下記式:
糖成分の2’位置で使用されるブロッキング基(BG)はまた、種々の態様を包含する。ある態様によれば、例えばBGは、負に荷電された基及び/又はバルキング基である。さらに例を挙げると、BGは任意には、例えばCN、NO2、N3、ハロ基、エーテル基、アルキルエーテル基、アリールエーテル基、アルデヒド基、カルボン酸基、エステル基、アミノ基、OCH3、OCH2COOH、O−シリルエーテル基、ケト基、O−ラクトン基、O−アルキル基、O−環状アルキル基、O−アルケニル基、O−アルキニル基、カルバメート基、イミド基、アミド基、及びそれらの組合せからから選択される。より具体的には、BGは任意には、下記式:
Zは、O、S又はSeである]を含んでなる。図2Bは、この式を有するブロッキング基を含んでなる1つのヌクレオチドを図示する。さらに例を挙げると、BGは任意には、下記式:
本明細書に記載のようにして使用されるオリゴヌクレオチドに包含される2’−終止ヌクレオシド及びヌクレオチドは、種々の方法を用いて合成され得る。例えば、標識された非伸長性ヌクレオチドの1つの生成方法は、ヌクレオシド(例えばリボヌクレオシド、カルボン酸ヌクレオシド等)の糖成分の5’−位置に少なくとも1のリン酸基を結合し、前記ヌクレオシドの糖成分の2’−位置に少なくとも1のブロッキング基を結合することを包含する。この方法に使用されるヌクレオシドに任意には包含される典型的なブロッキング基及び塩基は、本明細書に記載される。この方法はまた、ヌクレオシドの糖成分、ブロッキング基及び/又は塩基に少なくとも1の標識を結合することを包含する。適切な標識がさらに下記に記載される。
2’−終止ヌクレオシドを含む遮断オリゴヌクレオチドの合成は、種々のタイプの核酸合成試薬を用いて達成され得る。例を挙げると、オリゴヌクレオチドは、例えばヌクレオチド導入生体触媒(例えばDNAポリメラーゼ、リガーゼ等)を用いて、酵素的に、又は例えばホスホラミジット方法又は亜リン酸トリエステル方法を用いて、化学合成により、合成され得る(Herdewijn, Oligonucleotide Synthesis: Methods and Applications, Humana Press (2005), Gait (Ed.), Oligonucleotide Synthesis, Oxford University Press (1984), Vorbruggen et al., Handbook of Nucleoside Synthesis, John Wiley & Sons, Inc. (2001)、及びHermanson, Bioconjugate Techniques, Elsevier Science (1996))。標識が、標識されたヌクレオシド三リン酸モノマー(例えば標識された伸長可能ヌクレオチド、標識された2’−終止ヌクレオチド等)を用いて、酵素合成の間、導入され得るか、又は標識された非ヌクレオチド又はヌクレオチドホスホラミジットを用いて、化学合成の間、導入され得るか、又は合成に続いて導入され得る。2’−終止遮断オリゴヌクレオチドの合成はまた、例えばBodepudi等により、2004年6月29日付出願、“SYNTHESIS AND COMPOSITIONS OF NUCLEIC ACIDS COMPRISING 2’-TERMINATOR NUCLEOSIDES”、国際出願番号WO2005/026184号にも記載されている。遮断オリゴヌクレオチドの合成は、下記例においても、さらに記載されている。
ホスホラミジット方法によりオリゴヌクレオチドを形成するために使用される化学の説明はまた、例えば1984年7月3日付発行、“Process for preparing polynucleotides”、米国特許第4,458,066号(Caruthers等)及び1983年11月15日付発行、“Phosphoramidite compounds and processes”、米国特許第4,415,732号(Caruthers等)にも提供されている。
本明細書に記載のオリゴヌクレオチド(例えばプライマー、プローブ等)は任意には、例えば続く検出を促進するために標識される。ある態様によれば、核酸合成試薬(例えば2’−終止ヌクレオチドのホスホラミジット前駆体、他のヌクレオチドのホスホラミジット前駆体等)は、オリゴヌクレオチドの合成の前、標識される。例えば、標識は、例えばアミド、エステル、チオエステル、エーテル、チオエーテル、炭素−炭素、又は他のタイプの共有結合を通して、例えば単素環式環、複素環式環、又は2’−終止ヌクレオチド又は他のヌクレオチドのアリール基に(ピリミジンのC5、シチジンのN4、プリンのN7、アデノシンのN6、プリンのC8、又は当業界において知られている別の結合部位を通して)、結合される。さらに、又は他方では、標識は、2’−終止ヌクレオチド又は他のヌクレオチド(例えばdNTP等)の糖成分(例えばリボース糖等)、又はその類似体(例えば炭素環式環等)、及び/又は2’−終止ヌクレオチド又は他のヌクレオチドのリン酸基に、例えばアミド、エステル、チオエステル、エーテル、チオエーテル、炭素−炭素、又は他の結合である共有結合により結合される。共有結合は通常、標識の求電子基及び求核基とヌクレオチドとの間での反応において形成される。確かな態様においては、標識及びヌクレオチドは、お互い直接的に結合される(例えば単、二重、三重又は芳香族炭素−炭素結合、又は炭素−窒素結合、窒素−窒素結合、炭素−酸素結合、炭素−硫黄結合、リン−酸素結合、リン−窒素結合、等を通して)。任意には、リンカーは標識を2’−終止ヌクレオチド又は他のヌクレオチドに結合せしめる。広範囲の種類のリンカーが、標識及びヌクレオチドの結合への使用のために使用されるか、又は適合され得る。本明細書に言及されるようなリンカーは、非制限的な例示である。
本発明はまた、特に、核酸から2’−終止ヌクレオチドを除去し、ヌクレオチドを重合し、/又は核酸を増幅することが所望される広範囲の種類の用途に使用され得る多くの異なった反応混合物を提供する。ある態様によれば、例えば反応混合物は、均質増幅/検出アッセイ(例えば同時PCRモニターリング)の実施に、又は突然変異の検出又は核酸の遺伝子型決定に使用される。ある態様によれば、複数のプライマー及び/又はプローブが、多重型を包含する用途への使用のために反応混合物に一緒にプールされる。それらの用途の多くは、さらに下記に記載されるか、又は他方では、本明細書に言及される。
本発明はまた、本明細書に記載される遮断オリゴヌクレオチドの使用方法も提供する。ある態様によれば、それらのオリゴヌクレオチドは、それらの標的から由来する対象についての診断、遺伝子又は他の情報を提供するために、標的核酸の検出を包含するアッセイを実施するために使用される。かかる態様はまた、下記例においても例示される。
本発明はまた、多くの異なったアッセイを実施するために使用され得る系も提供する。系は、2’−終止ヌクレオチドを含んでなる1又は2以上のオリゴヌクレオチドを含む。ある態様によれば、オリゴヌクレオチドは固体支持体上に整列され、他においては、それらは例えば溶液において実施されるアッセイのために1又は2以上の容器に供給される。ある態様によれば、系はまた、容器内又は支持体上に生成される検出可能シグナルを検出するために構成される少なくとも1の検出装置又は検出成分(例えば分光計)を含む。さらに、系はまた任意には、容器内又は固体支持体上の温度を調節するために、容器又は固体支持体に作動式に連結される少なくとも1の熱モジュレータ(例えば熱循環装置)、及び/又は例えば容器内又は固体支持体上で1又は2以上の近位性アッセイを実施するために、容器又は固体支持体への及び/又はそれから流体を移行する少なくとも1の流体移行成分(例えば自動化されたピペット)を包含する。
2’−O−PO3遮断オリゴヌクレオチド(図5)を、標準のβ−シアノエチルホスホラミジット化学を用いて、自動Applied Biosystems 394合成機上で合成した(図6)。それらのオリゴヌクレオチドの合成に使用される固体支持体は、オリゴヌクレオチドの3’末端でのリン酸基の導入を促進する、3’−リン酸CPG(Glen Research、#20−2900−41からの)であった。合成の最初の循環においては、ChemGenesから購入されたリボヌクレオチド−2’−O−ホスホラミジット(図7、ここでB=塩基;アデノシン(パート#ANP−5681)、シチジン(ANP−5682)、グアノシン(ANP−5683)及びウリジン(ANP−5684))が、固体支持体とのカップリングのために使用された。合成の第2循環において及びその後、標準のデオキシヌクレオシドホスホラミジットを使用した。合成の後、オリゴヌクレオチド固体支持体から分解し、室温で24〜48時間、濃水酸化アンモニウムにより保護解除した。次に、水酸化アンモニウムをサイズ排除クロマトグラフィー(NAP−10カラム;無菌水による溶出)により除去した。次に、オリゴヌクレオチドを、逆相HPLC(PRP−1カラム、トリエチル酢酸アンモニウム−アセトニトリル緩衝液)により精製した。精製されたオリゴヌクレオチドを濃縮し、次に、弗化カリウムにより処理し、オリゴヌクレオチドの3’末端で3’−ヒドロキシル基のシリル保護を除去した。オリゴヌクレオチドをさらに、RP−HPLC(Xterra SB-18カラム)により精製した。それらのオリゴヌクレオチドの純度及び同一性を、イオン交換HPLC(Dionex、60℃でpH8.0)及びLC−MS分析により確かめた。
PAP−関連のHIV DNA鋳型滴定を、ゲノムDNAの存在下で及びその不在下で実施した。図8は、この分析において使用される種々の反応条件下でPCR産物の検出を示すゲルの写真である。このデータは、例えば本明細書に記載される遮断プライマーを用いないでの反応に対して、遮断プライマーを用いて達成され得る、改良された増幅特異性及び感度を示す。
50℃、2分
93℃、1分
93℃、15秒→52℃、4分×4循環
90℃、15秒→55℃、4分×56循環
プライマー1 5’−TGAGACACCAGGAATTAGATATCAGTACAATGT−3’(配列番号1)
プライマー2 5’−CTAAATCAGATCCTACATATAAGTCATCCATGT−3’(配列番号2)
及び次の遮断プライマー(図8において「遮断プライマー」で示す反応参照):
プライマー3 5’−TGAGACACCAGGAATTAGATATCAGTACAATGU*−3’(配列番号3)
プライマー4 5’−CTAAATCAGATCCTACATATAAGTCATCCATGU*−3’(配列番号4)
を含む。ここでU*は2’−リン酸−U(すなわち、2’位置でリン酸基を含んでなる2’−終止ヌクレオチド)を指す。反応はまた、混合物に添加される25ngのヒトゲノムDNAを含むか(図8で「25ngゲノムDNA」で示す反応参照)、又は欠いていた(図8で「クリーン標的」で示す反応参照)。図8にさらに示されるように、反応はまた、1μlのHIV検体希釈剤(10mMのトリス、0.1mMのEDTA、20μg/mlポリA及び0.09%NaN3)又は「負」の反応における1μlのHIV検体希釈剤により希釈された標的核酸を含む、線状化されたプラスミドDNAの105、104、103、102又は101コピーを含んだ。示されるプラスミドDNAから170個の塩基対産物を増幅した。
野生型K−Rasプラスミド鋳型のバックグラウンドにおける種々のコピー数の変異体K−Rosプラスミド鋳型を包含する増幅、及びブロックされた及び非遮断プライマーの比較を実施した。図9は、それらの反応に使用される種々の変異体K−Rasプラスミド鋳型コピー数(x軸)について観察される限界サイクル(GT)値(y軸)を示すグラフである。図9はさらに、本明細書に記載される遮断プライマーを用いて達成され得る改良された識別を例示する。
50℃、2分
93℃、1分
92℃、15秒→65℃、2分×60循環
プライマー5 5’−AAACTTGTGGTAGTTGGAGCTC−3’(配列番号5)
プライマー6 5’−GTTGGATCATATTCGTCCACAA−3’(配列番号6)、
及び次の遮断プライマー(図9において「遮断プライマー」で示す反応参照):
プライマー7 5’−AAACTTGTGGTAGTTGGAGCTC*−3’(配列番号7)
プライマー8 5’−GTTGGATCATATTCGTCCACAA*−3’(配列番号8)
を含む。
種々の濃度での種々の酵素によるK−Rasプラスミド鋳型に関する増幅を行った。図10は、種々の酵素について観察される限界サイクル(CT)値(y軸)及びそれらの反応に使用される濃度(x軸)を示すグラフである。反応を、次の温度プロフィールにより、ABI5700配列検出系を用いて実施した:
50℃、2分
93℃、1分
92℃、15秒→60℃、2分×60循環
プライマー9 5’−AAACTTGTGGTAGTTGGAGCTGU*−3’(配列番号9)
プライマー10 5’−GTTGGATCATATTCGTCCACAA*−3’(配列番号10)を含む。
加ピロリン酸分解活性化重合(「PAP」)を実施するG46E L329A E678G CS5 DNAポリメラーゼ及びG46E L329A D640 S671F E678G CS5 DNAポリメラーゼの能力を比較した。反応緩衝液は、100 mM Tricine pH 8.0、0 mM (G46E L329A E678G CS5 DNAポリメラーゼ) 又は50 mM (G46E L329A D640 S671F E678G CS5 DNAポリメラーゼ) KOAc、10% v/v グリセロール、0.04 U/μl UNG、4 mM Mg(OAc)2、0.2X SYBR Green I、2.5% v/v酵素貯蔵緩衝液 (50% v/v グリセロール、100 mM KCl、20 mM トリスpH 8.0、0.1 mM EDTA、1 mM DTT、0.5% Tween 20)、0.2 mM各dATP、dCTP及びdGTP、及び0.4 mM dUTP、及び100 μM ピロリン酸から成った。M13鋳型(GenBank Accession No. X02513)及び酵素を、交差−滴定した。使用されるM13濃度は、20μlの反応当たり0、104、105及び106個のコピーであった。使用される酵素濃度は、2.5 nM、5 nM、10 nM、15 nM、20 nM、25 nM、35 nM及び50 nMであった。次の循環パラメーターを用いて、384−ウェルサーモサイクラーにおいて三重反復して設定した:50℃、2分;90℃、1分;次に50℃、15秒、続く62℃の伸長温度、60秒(96循環)。
ブロックされていないHCV RTプライマーの伸長と、逆転写反応におけるHCV RNA鋳型に基づく遮断プライマーの伸長とを比較した。それらのRT比較を種々のポリメラーゼを用いて行った。例を挙げると、図13は、cDNAが5’−ヌクレアーゼプローブを含む同時PCRを用いて測定されるそれらの反応に使用される種々の酵素(x軸)について観察された限界サイクル(Ct)値(y軸)を示すグラフである。
プライマー1 5’−GCAAGCACCCTATCAGGCAGTACCACAA−3’(配列番号12)、
及び次の遮断プライマー(図13において「2’PO4(遮断)」で示す反応参照):
プライマー2 5’−GCAAGCACCCTATCAGGCAGTACCACAA*−3’ (配列番号13)
を含み、ここでA*は、2’−リン酸−A又は2’−一リン酸−3’−ヒドロキシルアデノシンヌクレオチド(すなわち、2’位置でリン酸基を含んでなる2’末端ヌクレオチドを指す。
Z05DNAポリメラーゼ(13nM)
GLQDS CS5 DNAポリメラーゼ(25nM)と組合わされるGLQDSE CS5 DNAポリメラーゼ(100nM)
GLQDS CS5 DNAポリメラーゼ(50nM)と共に組合わされるGLQDSE CS5 DNAポリメラーゼ(50nM)。
50℃、2分
95℃、15秒→60℃、1分×50循環。
図14は、双方向PAPが実施される場合に生成されたBRAF腫瘍遺伝子増幅のPCR増殖曲線を示す。x軸は標準化された、蓄積された蛍光を示し、y軸はPAP PCR増幅の循環を示す。より具体的には、それらのデータは、BRAF腫瘍遺伝子におけるV599Eコドン変化を担当するT→A突然変異の突然変異−特異的増幅(Brose等(2002) Cancer Res 62:6997-7000を参照のこと)が、突然変異の正確な位置でのそれらの3’末端ヌクレオチドでオーバーラップする、2’−終止遮断プライマーを用いて実施される場合に生成された。野生型配列に対して特異的なプライマーが野生型標的又は変異標的に対して反応せしめられる場合、野生型標的のみが検出された。逆にいえば、突然変異配列に対して特異的なプライマーが野生型標的又は変異標的に対して反応せしめられる場合、変異標的のみが検出された。
F5W 5’−AATAGGTGATTTTGGTCTAGCTACAGU*−3’(配列番号14)
R5W 5’−GGACCCACTCCATCGAGATTTCA*−3’(配列番号15)、
及び次の変異体BRAFプライマー(図14では「F5M/R5M」と表示):
F5M 5’−AATAGGTGATTTTGGTCTAGCTACAGA*−3’(配列番号16)
R5M 5’−GGACCCACTCCATCGAGATTTCU*−3’(配列番号17)を含み、ここでA*は2’−リン酸−A又は2’−一リン酸−3’−ヒドロキシルアデノシンヌクレオチドを指し、U*は2’−リン酸−U又は2’−一リン酸−3’−ヒドロキシルウリジンヌクレオチド(すなわち、2’位置でリン酸基を含んでなる2’−終止ヌクレオチド)を指す。
50℃、1分
93℃、1分
90℃、15秒
60℃、150秒→×60循環。
この予測例は、遮断プライマーが、そのプライマーが活性化され、伸長されるにつれて、検出可能なシグナルの生成を導くPAP活性化を包含する同時モニタープロトコールを例示する。
下記プライマーQXは、その3’末端から13番目のヌクレオチド(A)に結合される消光色素分子、Black Hole Quencher(登録商標) (BHQ) (Biosearch Technologies、Inc.)を含むDNAオリゴヌクレオチドである。
プライマーQX 5’−GCAAGCACCCTATCAQGGCAGTACCACA−3’ (配列番号18)
(ここで、QはBHQ分子の存在を表す)
R1 3’−PCGTTCGTGGGATAGTCCGTCATGGTGTT−5’ (配列番号19)
(ここで、Pは3’リン酸分子を表す)
プライマーQXFAM 5’−GCAAGCACCCTATCAQGGCAGTACCACAF−3’ (配列番号20)
(ここで、QはBHQ分子の存在を表し、Fはフルオレセイン−標識された2’リン酸アデニンを表わす)
プライマーHC2 5’−GCAGAAAGCGTCTAGCCATGGCTTA−3’ (配列番号21)。
50℃、1分
93℃、1分
90℃、15秒
60℃、150秒→×60循環。
Claims (7)
- オリゴヌクレオチドからのヌクレオチドを除去する方法であって、
少なくとも1の標的核酸を、
ヌクレオチド除去活性を含んでなる少なくとも第1生体触媒、及び
前記標的核酸の少なくとも第1配列に対して少なくとも部分的に相補的である、2’−終止ヌクレオチドを含んでなる少なくとも1のオリゴヌクレオチドとともに、
前記第1生体触媒が前記オリゴヌクレオチドから少なくとも前記2’−終止ヌクレオチドを除去し、除去された2’−終止ヌクレオチド及び短縮オリゴヌクレオチドを生成するような条件下でインキュベートすることにより、前記オリゴヌクレオチドからヌクレオチドを除去することを含んでなる方法。 - オリゴヌクレオチドが2’−終止ヌクレオチドを3’末端に有する、請求項1に記載の方法。
- 2’−終止ヌクレオチドが、G46E E678G CS5 DNAポリメラーゼ、G46E L329A E678G CS5 DNAポリメラーゼ、G46E L329A D640G S671F CS5 DNAポリメラーゼ、G46E L329A D640G S671F E678G CS5 DNAポリメラーゼ、G46E E678G CS6 DNAポリメラーゼ、ΔZO5Rポリメラーゼ、E615G Taq DNAポリメラーゼ、サーマス・フラバス(Thermus flavus)ポリメラーゼ、TMA−25ポリメラーゼ、E678G TMA−25ポリメラーゼ、TMA−30ポリメラーゼ、E678G TMA−30ポリメラーゼ、Tth DNAポリメラーゼ、サーマス種SPS−17ポリメラーゼ、E615G Taqポリメラーゼ、サーマスZO5Rポリメラーゼ、T7 DNAポリメラーゼ、コーンバーグ(Kornberg )DNAポリメラーゼ I、クレノウ DNAポリメラーゼ、Taq DNAポリメラーゼ、ミクロコッカス(Micrococcal )DNAポリメラーゼ、αDNAポリメラーゼ、逆転写酵素、AMV逆転写酵素、M−MuLV逆転写酵素、DNAポリメラーゼ、RNAポリメラーゼ、E.コリRNAポリメラーゼ、SP6 RNAポリメラーゼ、T3 RNAポリメラーゼ、T4 DNAポリメラーゼ、T7 RNAポリメラーゼ、RNAポリメラーゼII、末端トランスフェラーゼ、ポリヌクレオチドホスホリラーゼ、リボヌクレオチド類似体−導入DNAポリメラーゼ、リボヌクレオチド導入DNAポリメラーゼ等から選択される1又は2以上のヌクレオチド導入生体触媒により伸長不能とされる、請求項1に記載の方法。
- 第1生体触媒がヌクレオチド導入活性を含んでなり、
前記方法が、標的核酸を、第1生体触媒、短縮オリゴヌクレオチド及び少なくとも1の追加のヌクレオチドと共に、前記第1生体触媒が短縮オリゴヌクレオチド末端に追加のヌクレオチドを組込み、伸長されたオリゴヌクレオチドを生成する条件下でインキュベートすることを含んでなり、或いは、
前記方法が、標的核酸を、ヌクレオチド導入活性を含んでなる第2生体触媒、短縮オリゴヌクレオチド、及び少なくとも1の追加のヌクレオチドと共に、第2生体触媒が短縮オリゴヌクレオチド末端に追加のヌクレオチドを組込み、伸長されたオリゴヌクレオチドを生成する条件下でインキュベートすることを含んでなる、請求項1に記載の方法。 - 第1及び/又は第2生体触媒が、ポリメラーゼ及び逆転写酵素からなる群より選択される、請求項4に記載の方法。
- BGが、下記式:
Qは、O、S又はNHであり;
Xは、H、OH、CH3、BH3、F又はSeHであり;
Zは、O、S又はSeである]
又は下記式:
Qは、O、S又はNHであり;
Xは、O、S又はNHであり;
Zは、O、S又はSeであり;
Rは、アルキル基、アルケニル基又はアルキニル基である]
又は下記式:
Qは、O、S又はNHであり;
Xは、O、S又はNHであり;
Zは、O、S又はSeであり;
Lは、−CONH(CH2)nNH−、−CO(CH2)nNH−又は−CONH(CH2CH2O)nCH2CH2NH−であり;
nは、0よりも大きい整数であり;
Rは、NH2、SH、COOH、消光剤成分、レポーター成分、ビオチン又は親和性成分である]
で表される、請求項6に記載の方法。
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HK1220733A1 (zh) | 2017-05-12 |
EP2076606A2 (en) | 2009-07-08 |
JP2010506573A (ja) | 2010-03-04 |
US20070154914A1 (en) | 2007-07-05 |
ES2381505T3 (es) | 2012-05-28 |
US7745125B2 (en) | 2010-06-29 |
ATE542922T1 (de) | 2012-02-15 |
CA2664229A1 (en) | 2008-04-24 |
EP2076606B1 (en) | 2012-01-25 |
CN101528945A (zh) | 2009-09-09 |
WO2008046602A2 (en) | 2008-04-24 |
WO2008046602A3 (en) | 2008-06-26 |
CN105274169A (zh) | 2016-01-27 |
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