JP4128959B2 - 核酸結合因子の補調節因子を検出し定量するための、迅速かつ鋭敏なアッセイ - Google Patents
核酸結合因子の補調節因子を検出し定量するための、迅速かつ鋭敏なアッセイ Download PDFInfo
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Description
本出願は、2001年8月13日に出願された、同時に継続する米国特許出願第09/928,385号の一部継続出願であり、ここに参照してその全体が本明細書に組み込まれる。
本研究は、米国保健社会福祉省/国立衛生研究所の授与番号GM50514によって支援された。米国政府は本発明における一定の権利を保有する。
配列表の書面の写しおよび同一の配列表のコンピュータ読み取り可能な形式のものを以下に添付し、そして参照して本明細書に組み込まれる。米国特許法施行規則第1.821条第(f)項に基づいて、コンピュータ読み取り可能な形式のものに記録された情報は、書面による配列表と同一である。
本発明は、全般に、ルミネセンスシグナル強度の変化によって、または検出可能な標識の検出によって、特定のタンパク質、因子および化学リガンド、特に配列特異的核酸結合因子ならびにそれらの補調節因子を検出し定量するバイオセンサーおよび方法に関する。本発明は、核酸結合因子の活性測定またはその補調節因子の活性測定が求められるあらゆる用途に用いられる。
本発明を実施または検証する際には、本明細書に記載されたものと類似のまたは同一のあらゆる方法および材料を用いることができるが、好ましい材料および方法は記載されている。本発明を実施する目的で、次の用語を下記のように定義する。
核酸結合因子およびその補調節因子の活性を測定するための新規なバイオセンサーおよび方法が開示される。本明細書で説明する新規なバイオセンサーおよび方法は、現存する技術を超える明確な利点と利益とを有する。これらの利益としては、数ある中で、高感度、シグナルに対するノイズの低い比および複数を検出する形式が挙げられ、この複数を検出する形式は、本発明を実行する者が、彼らの当面のスクリーニング系に組み込めるように検出形式をカスタマイズして採用することが可能にする。同族タンパク質結合部位に対応する配列が二つの核酸分子の間で分割されるように、これらの二つの核酸分子を調製するという着想が本発明に密接に関連している。この二つの核酸分子(本明細書では核酸構成部分と称する)は、核酸構成部分がいくらか会合する傾向を持つように、短い相補的なオーバーハングを含んでいてもよいが、この傾向は小さく設計されるため、タンパク質が存在しない場合は核酸構成部分間の会合はほとんど生じない。二つの核酸構成部分間の会合によってタンパク質についての同族結合部位が再形成されるので、タンパク質が存在する場合はその同族の核酸結合部位に対するタンパク質の親和性によって、二つの核酸構成部分の会合が完成する方向に促進される。核酸−タンパク質複合体の形成を検出することは、二つの核酸構成部分のそれぞれを、ルミネセンスプローブ、蛍光色素、ケミルミネセンス基質または比色分析用基質で標識することによって成し遂げられる。核酸−タンパク質複合体における二つの核酸断片間が物理的に近接することによって、蛍光シグナルの変化についてのメカニズム、または核酸−タンパク質複合体の形成に関連する比色分析用/ケミルミネセンス生成物形成のメカニズムが提供される。さらに、特にDNA修復酵素の活性を測定するために本発明を適合化する場合、単一のバイオセンサーにおいて三つ以上の核酸構成部分を用いてもよい。
本明細書に上述されているように、近接性に基づく、核酸結合タンパク質補調節因子の活性を測定する方法に加えて、本発明は、核酸結合の補調節因子についての、または翻訳後修飾および効果的な酵素などの核酸結合因子活性に影響を与える細胞イベントについてのバイオセンサーのより広範囲の実施態様を含む。本明細書に上述されているように、核酸結合タンパク質補調節因子についてのバイオセンサーは、「分割した」核酸結合エレメント−プラス−核酸結合因子の技術を利用している。しかし、補調節因子を検出する方法は、近接性に基づく検出方法に限定されるものではなく、ありとあらゆる分子の検出方法を採用してもよい。
CAPは細菌転写アクチベーターであり、配列特異的な様式でKd=約0.1nMにてDNAと結合する(バスビー、エスおよびエブライト、アール・エイチ(Busby,S.,and Ebright,R.H.)、J.Mol.Biol.293,199−213,1999)。コンセンサスCAP部位(エブライト、アール・エイチ、エブライト、ワイ・ダブリュおよびガナサケラ、エイ(Ebright,R.H.,Ebright,Y.W.and Gunasakera,A.)、Nucleic Acids Res.17,10295−10305,1989)に対応する38bpのDNA配列を、CAPアッセイ試薬を調製するために必要なオリゴヌクレオチドを設計するための基礎として用いた。図1Aに説明されたスキームに従って調製した。図3は、用いた設計の詳細を示す。標準的なホスホルアミダート自動化オリゴヌクレオチド合成を用いて、次の四種のオリゴヌクレオチドを合成した(F=dT−フルオレセイン;D=dT−dabcyl)。
生物においては多数の配列特異的核酸結合因子が進化していて、環境の刺激に応じて遺伝子発現を調節している。これらの因子の多くの核酸結合活性は、小さな補調節因子または翻訳後修飾による、核酸結合因子の、直接的なまたは間接的な相互作用を介して仲介されている。これらの補調節因子の多くは、環境科学(一般的な汚染物質)、法医学および毒物学におけるそれらの役割の理由から、興味の対象となっている。これらの補調節因子の多くは、細胞の代謝産物か、または細胞内でのシグナリングもしくは調節の役割を果たす分子である。従って、これらの検出は、臨床化学および医学的診断において関心事である。
Claims (26)
- 第一核酸構成部分、第二核酸構成部分および核酸結合因子を含み、
(a)第一核酸構成部分は核酸結合エレメントの一部を含み、および第二核酸構成部分は同じ核酸結合エレメントの一部を含み、ここで、第一核酸構成部分および第二核酸構成部分の両方の組み合わせは前記核酸結合エレメントを形成し、および
(b)検出可能な標識が、第一核酸構成部分、第二核酸構成部分または核酸結合因子に取り付けられており、ここで前記標識は、核酸結合因子が、核酸結合エレメントを形成する第一核酸構成部分および第二核酸構成部分に結合すると検出され、該結合は核酸結合タンパク質補調節因子によって増強または妨害される、
核酸結合タンパク質補調節因子の活性を測定するのに有用なバイオセンサーアッセイ。 - 第一核酸構成部分が固体基質に取り付けられ、および第二核酸構成部分が検出可能な標識に取り付けられている、請求項1に記載のバイオセンサーアッセイ。
- (a)固体基質が、マルチウェルプレート、マイクロアレイスライド、メンブレン、ミクロスフェア、ライトガイド、光ファイバー、導電性材料およびプラズモン共鳴チップの表面からなる群より選択され、(b)検出可能な標識が、蛍光色素、発色団、酵素、リンカー分子、ビオチン、電子供与体、電子受容体、色素、金属および放射性核種からなるリストより選択される、請求項2に記載のバイオセンサーアッセイ。
- 検出可能な標識が、蛍光色素、発色団、酵素、リンカー分子、ビオチン、電子供与体、電子受容体、色素、金属および放射性核種からなるリストより選択される、請求項1に記載のバイオセンサーアッセイ。
- 第一核酸構成部分が蛍光ドナーに取り付けられ、第二核酸構成部分が蛍光アクセプターに取り付けられている、請求項4に記載のバイオセンサーアッセイ。
- 核酸結合因子が、p53、TrpR、cAMP受容体タンパク質およびLacリプレッサーからなる群より選択される転写因子である、請求項5に記載のバイオセンサーアッセイ。
- 核酸結合因子が固体マトリックスに取り付けられている、請求項1に記載のバイオセンサーアッセイ。
- 固体基質がマルチウェルプレートであり、検出可能な標識がビオチンである、請求項3に記載のバイオセンサーアッセイ。
- (a)第一核酸構成部分、第二核酸構成部分および核酸結合因子をサンプルと混合すること、ここで
(i)第一核酸構成部分は核酸結合エレメントの一部を含み、第二核酸構成部分は同じ核酸結合エレメントの一部を含み、ここで、第一核酸構成部分および第二核酸構成部分の両方の組み合わせは前記核酸結合エレメントを形成し、および
(ii)検出可能な標識が第一核酸構成部分、第二核酸構成部分または核酸結合因子に取り付けられており、ここで前記標識は、核酸結合因子が、核酸結合エレメントを形成する第一核酸構成部分および第二核酸構成部分に結合すると検出され、該結合は核酸結合タンパク質補調節因子によって増強または妨害される、;ならびに
(b)検出方法により核酸結合タンパク質補調整因子の活性を検出すること;
を含む、
サンプルにおける核酸結合タンパク質補調節因子の活性を測定する方法。 - 第一核酸構成部分が固体基質に取り付けられ、および第二核酸構成部分が検出可能な標識に取り付けられている、請求項9に記載の方法。
- (a)固体基質が、マルチウェルプレート、マイクロアレイスライド、メンブレン、ミクロスフェア、ライトガイド、光ファイバー、導電性材料およびプラズモン共鳴チップの表面からなる群より選択され、(b)検出可能な標識が、蛍光色素、発色団、酵素、リンカー分子、ビオチン、電子供与体、電子受容体、色素、金属および放射性核種からなるリストより選択される、請求項10に記載の方法。
- 検出可能な標識が、蛍光色素、発色団、酵素、リンカー分子、ビオチン、電子供与体、電子受容体、色素、金属および放射性核種からなるリストより選択される、請求項9に記載の方法。
- 第一核酸構成部分が蛍光ドナーに取り付けられ、第二核酸構成部分が蛍光アクセプターに取り付けられ、検出方法が蛍光共鳴エネルギー転移である、請求項12に記載の方法。
- 核酸結合因子が、p53、TrpR、cAMP受容体タンパク質およびLacリプレッサーからなる群より選択される転写因子である、請求項13に記載の方法。
- 核酸結合因子が固体マトリックスに取り付けられている、請求項9に記載の方法。
- 検出可能な標識がビオチンであり、固体基質がマルチウェルプレートである、請求項11に記載の方法。
- 検出方法が蛍光偏光である、請求項12に記載の方法。
- 少なくとも二つのバイオセンサーを含み、該バイオセンサーのそれぞれは第一核酸構成部分、第二核酸構成部分および核酸結合因子を含み、ここで
(a)第一核酸構成部分は核酸結合エレメントの一部を含み、および第二核酸構成部分は同じ核酸結合エレメントの一部を含み、ここで、第一核酸構成部分および第二核酸構成部分の両方の組み合わせは前記核酸結合エレメントを形成し、および
(b)第一核酸構成部分は固体基質に取り付けられ、および第二核酸構成部分は検出可能な標識に取り付けられている、
核酸結合タンパク質補調節因子の活性を測定するのに有用なバイオセンサーのアレイ。 - (a)固体基質が、マルチウェルプレート、マイクロアレイスライド、メンブレンおよびプラズモン共鳴チップの表面からなる群より選択され、および(b)検出可能な標識が、蛍光色素、発色団、酵素、リンカー分子、ビオチン、電子供与体、電子受容体、色素、金属および放射性核種からなるリストより選択される、請求項18に記載のアレイ。
- 第一核酸構成部分および第二核酸構成部分を含み、ここで
(a)第一核酸構成部分は核酸結合エレメントの一部を含み、第二核酸構成部分は同じ核酸結合エレメントの一部を含み、ここで、第一核酸構成部分および第二核酸構成部分の両方の組み合わせは前記核酸結合エレメントを形成し、
(b)検出可能な標識が第一核酸構成部分または第二核酸構成部分に取り付けられており、ここで、前記核酸結合因子が、核酸結合エレメントを形成する第一核酸構成部分および第二核酸構成部分に結合すると、前記標識が近接性に基づく検出方法または一致に基づく検出方法により検出される、
核酸結合因子の活性を測定するのに有用なバイオセンサーアッセイ。 - 第一核酸構成部分が固体基質に取り付けられ、第二核酸構成部分が検出可能な標識に取り付けられている、請求項20に記載のバイオセンサーアッセイ。
- (a)固体基質が、マルチウェルプレート、マイクロアレイスライド、メンブレン、ミクロスフェア、ライトガイド、光ファイバー、導電性材料およびプラズモン共鳴チップの表面からなる群より選択され、(b)検出可能な標識が、蛍光色素、発色団、酵素、リンカー分子、ビオチン、電子供与体、電子受容体、色素、金属および放射性核種からなるリストより選択される、請求項21に記載のバイオセンサーアッセイ。
- 固体基質がマルチウェルプレートであり、検出可能な標識がビオチンである、請求項22に記載のバイオセンサーアッセイ。
- 少なくとも二つのバイオセンサーを含み、ここで
(a)該バイオセンサーのそれぞれは第一核酸構成部分および第二核酸構成部分を含み、
(b)第一核酸構成部分は核酸結合エレメントの一部を含み、および第二核酸構成部分は同じ核酸結合エレメントの一部を含み、ここで、第一核酸構成部分および第二核酸構成部分の両方の組み合わせは前記核酸結合エレメントを形成し、
(c)第一核酸構成部分は固体基質に取り付けられ、および第二核酸構成部分は検出可能な標識に取り付けられている、
核酸結合因子の活性を測定するのに有用なバイオセンサーのアレイ。 - (a)固体基質が、マルチウェルプレート、メンブレン、マイクロアレイスライドおよびプラズモン共鳴チップの表面からなる群より選択される;
(b)検出可能な標識が、蛍光色素、発色団、酵素、リンカー分子、ビオチン、電子供与体、電子受容体、色素、金属および放射性核種からなるリストより選択される、
請求項24に記載のアレイ。 - 固体基質がマルチウェルプレートであり、検出可能な標識がビオチンである、請求項25に記載のアレイ。
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CN102317779A (zh) | 2008-11-21 | 2012-01-11 | 圣路易大学 | 检测目标物多个表位的生物感应器 |
JP5720248B2 (ja) * | 2008-12-24 | 2015-05-20 | コニカミノルタ株式会社 | 表面プラズモンおよび蛍光共鳴エネルギー転移を利用した免疫アッセイ |
CA2787483C (en) | 2010-02-12 | 2018-03-06 | Saint Louis University | Molecular biosensors capable of signal amplification |
US10274484B2 (en) | 2014-09-12 | 2019-04-30 | Mediomics Llc | Molecular biosensors with a modular design |
KR101719285B1 (ko) * | 2014-11-04 | 2017-03-23 | 한국과학기술원 | 표적 물질에 의해 조절되는 핵산 중합효소 활성을 이용한 생체물질의 검출 및 정량 방법 |
CN111665235A (zh) * | 2019-03-08 | 2020-09-15 | 上海索昕生物科技有限公司 | 一种化学发光微阵列芯片及其应用 |
US11229909B2 (en) * | 2019-05-31 | 2022-01-25 | Illumina, Inc. | Flow cell with selective deposition or activation of nucleotides |
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ZA88319B (en) * | 1987-02-06 | 1988-08-12 | Lubrizol Enterprises, Inc. | Ocs enhancer |
US5198346A (en) * | 1989-01-06 | 1993-03-30 | Protein Engineering Corp. | Generation and selection of novel DNA-binding proteins and polypeptides |
JP2001503274A (ja) * | 1996-11-08 | 2001-03-13 | サイテル コーポレイション | 改良された発現ベクター |
US6294330B1 (en) * | 1997-01-31 | 2001-09-25 | Odyssey Pharmaceuticals Inc. | Protein fragment complementation assays for the detection of biological or drug interactions |
US6312896B1 (en) | 1998-09-17 | 2001-11-06 | Igen Inaternational, Inc. | Assays for measuring nucleic acid binding proteins and enzyme activities |
US6214552B1 (en) | 1998-09-17 | 2001-04-10 | Igen International, Inc. | Assays for measuring nucleic acid damaging activities |
US6177248B1 (en) | 1999-02-24 | 2001-01-23 | Affymetrix, Inc. | Downstream genes of tumor suppressor WT1 |
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CN1628173A (zh) | 2005-06-15 |
CN1314810C (zh) | 2007-05-09 |
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CA2473708A1 (en) | 2003-08-07 |
EP1476557B1 (en) | 2016-01-20 |
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CA2473708C (en) | 2010-11-16 |
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