JP6574178B2 - リガーゼ支援核酸環状化及び増幅 - Google Patents
リガーゼ支援核酸環状化及び増幅 Download PDFInfo
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- JP6574178B2 JP6574178B2 JP2016530068A JP2016530068A JP6574178B2 JP 6574178 B2 JP6574178 B2 JP 6574178B2 JP 2016530068 A JP2016530068 A JP 2016530068A JP 2016530068 A JP2016530068 A JP 2016530068A JP 6574178 B2 JP6574178 B2 JP 6574178B2
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Description
Wako DNA抽出器SPキット(和光純薬株式会社)を用いて、明らかに健康な個体の、クエン酸塩−リン酸塩−デキストロース(CPD)で安定化させた血漿から循環DNAを単離した。約1.3ngを、TBE緩衝液を用いる2%アガロースゲルによる電気泳動により分析し、SYBR Goldで染色し、Typhoonイメージャで可視化した。図2に示されるように、循環DNAの大部分は約180bpの長さであった。さらなるそれよりも少ない量の配列は約370bpの長さであり、さらにそれよりもかなり少ない量のそれよりも高分子量の配列があった。
Claims (10)
- 線状DNAから一本鎖DNA環を生成するための方法であって、
(a)線状DNAを準備する工程と、
(b)所望により線状DNAをアデノシン三リン酸の存在下でポリヌクレオチドキナーゼとともにインキュベートして、5’末端にリン酸基を有し、3’末端にヒドロキシル基を有するライゲーション可能なDNA配列を生成する工程と、
(c)線状DNA配列又はライゲーション可能なDNA配列を、アデノシン三リン酸の存在下でアデニル化酵素とともにインキュベートして、5’アデニル化DNA配列を生成する工程と、
(d)5’アデニル化DNA配列を、5’アデニル化一本鎖DNA配列の鋳型非依存性分子内ライゲーションが可能な非アデニル化リガーゼとともにインキュベートして、一本鎖DNA環を生成する工程と
を含んでおり、当該方法の工程の全てが、単離もしくは精製工程を介さずに単一の反応器で実施され、
5’アデニル化DNA配列が二本鎖形態である場合に、工程(d)の前に5’アデニル化DNA配列を変性させる工程をさらに含み、
アデニル化酵素が、好熱性古細菌Methanobacterium thermoautotrophicumに由来するRNAリガーゼ1であり、
5’アデニル化DNA配列を含む工程(c)の反応混合物をホスファターゼとともにインキュベートして、アデノシン三リン酸を反応混合物から除去する工程をさらに含み、
非アデニル化リガーゼが、サーマスバクテリオファージTS2126に由来するTS2126RNAリガーゼである、方法。 - 非アデニル化リガーゼが、アデノシン三リン酸非依存性であり、自己アデニル化、脱アデニル化及びアデニル酸転移の欠けた変異体又は操作されたリガーゼである、請求項1に記載の方法。
- 工程(a)〜(d)が、単一の反応器において順次実施される、請求項1に記載の方法。
- 線状DNAが、循環DNA、ホルマリン固定パラフィン包埋試料から単離したDNA、環境条件にさらされた法医学DNA試料、又は非常に古いDNA試料である、請求項1に記載の方法。
- 等温条件下で一本鎖DNA環を増幅する工程をさらに含む、請求項1に記載の方法。
- 一本鎖DNA環が、ローリングサークル増幅を介して増幅される、請求項5に記載の方法。
- 一本鎖DNA環が、ヌクレアーゼ耐性プライマーを用いて増幅される、請求項6に記載の方法。
- ヌクレアーゼ耐性プライマーが、1以上の修飾ヌクレオチドを含む、請求項7に記載の方法。
- 一本鎖DNA環が、ランダムプライマー混合物を用いて増幅される、請求項6に記載の方法。
- 一本鎖DNA環が、末端ミスマッチプライマーダイマー構造を含む部分拘束プライマー混合物から本質的になるプライマー溶液を用いて増幅される、請求項6に記載の方法。
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PCT/US2014/048179 WO2015013604A1 (en) | 2013-07-26 | 2014-07-25 | Ligase-assisted nucleic acid circularization and amplification |
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GB2467691A (en) | 2008-09-05 | 2010-08-11 | Aueon Inc | Methods for stratifying and annotating cancer drug treatment options |
WO2012040387A1 (en) | 2010-09-24 | 2012-03-29 | The Board Of Trustees Of The Leland Stanford Junior University | Direct capture, amplification and sequencing of target dna using immobilized primers |
US10655167B2 (en) | 2013-07-26 | 2020-05-19 | General Electric Company | Ligase-assisted nucleic acid circularization and amplification |
US11286519B2 (en) | 2013-12-11 | 2022-03-29 | Accuragen Holdings Limited | Methods and compositions for enrichment of amplification products |
US10767222B2 (en) | 2013-12-11 | 2020-09-08 | Accuragen Holdings Limited | Compositions and methods for detecting rare sequence variants |
US11859246B2 (en) * | 2013-12-11 | 2024-01-02 | Accuragen Holdings Limited | Methods and compositions for enrichment of amplification products |
US10335078B2 (en) | 2014-08-04 | 2019-07-02 | General Electric Company | Device for separation and collection of plasma |
CN108473932B (zh) | 2015-09-09 | 2022-07-15 | 集联健康有限公司 | 用于样品收集、稳定化和保存的系统、方法和装置 |
CN114807323A (zh) | 2015-10-09 | 2022-07-29 | 安可济控股有限公司 | 用于富集扩增产物的方法及组合物 |
JP2019500852A (ja) * | 2015-11-05 | 2019-01-17 | ゼネラル・エレクトリック・カンパニイ | リガーゼ支援核酸環状化および増幅 |
US20190062827A1 (en) * | 2016-03-14 | 2019-02-28 | RGENE, Inc. | HYPER-THERMOSTABLE LYSINE-MUTANT ssDNA/RNA LIGASES |
EP3458586B1 (en) | 2016-05-16 | 2022-12-28 | Accuragen Holdings Limited | Method of improved sequencing by strand identification |
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