JP2005304504A - 核酸精製用組成物及び方法 - Google Patents
核酸精製用組成物及び方法 Download PDFInfo
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- JP2005304504A JP2005304504A JP2005146671A JP2005146671A JP2005304504A JP 2005304504 A JP2005304504 A JP 2005304504A JP 2005146671 A JP2005146671 A JP 2005146671A JP 2005146671 A JP2005146671 A JP 2005146671A JP 2005304504 A JP2005304504 A JP 2005304504A
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- 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
- C12Q1/6806—Preparing nucleic acids for analysis, e.g. for polymerase chain reaction [PCR] assay
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/10—Processes for the isolation, preparation or purification of DNA or RNA
- C12N15/1003—Extracting or separating nucleic acids from biological samples, e.g. pure separation or isolation methods; Conditions, buffers or apparatuses therefor
- C12N15/1006—Extracting or separating nucleic acids from biological samples, e.g. pure separation or isolation methods; Conditions, buffers or apparatuses therefor by means of a solid support carrier, e.g. particles, polymers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
- Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
- Y10T428/2996—Glass particles or spheres
Abstract
【解決手段】シリカ材料、シリカゲルとガラス粒子、特にガラス繊維の混合物;塩酸グアニジウム又はチオシアン酸グアニジウムなどのカオトロピック塩のこの様な混合物;及び、カオトロピック塩中の水溶液中のこのような混合物の懸濁液。核酸を含有する水溶液をカオトロピック塩の水溶液と混合し、得られた溶液をシリカ材料の混合物に接触させ、核酸をシリカ材料と結合させ、核酸以外の材料をシリカ材料から洗い流した後、シリカ材料から遊離させることで核酸を得る。
【効果】その後の処理又は分析を妨げるいかなる塩又は高分子に汚染されていない核酸の水溶液を提供する。
【選択図】なし
Description
DNA又はRNAを他の物質から分離し、分子生物学的手順で使用するのに適切な程度まで十分にDNA又はRNAから汚染物質を除去し、このような用途に適したDNA又はRNAを単離するために、シリカゲルとガラス粒子の混合物をカオトロピック塩の水溶液と併用すると有利であることが茲に知見された。このような混合物はRNAを分離及び単離するのに使用しても有利である。
1態様において、本発明はシリカゲルとガラス粒子の混合物である。
超純粋グアニジン−HCl(米国、オハイオ州、クリーブランドに所在のAmresco製Amresco Ultrapure)20kgを脱イオン蒸留水30Lに溶解することにより7Mグアニジン−HCl(即ち塩酸グアニジニウム)溶液を調製した。
7Mグアニジン−HClの代わりにチオシアン酸グアニジニウム(米国、オハイオ州、クリーブランドに所在のAmresco製結晶Amresco Ultropure)の6M溶液を使用した以外は実施例1の手順に従って本実施例の標記樹脂を調製した。EDTA(米国、ミズーリ州、セントルイスに所在のSigma Chemical Company製EDTA2ナトリウム塩)を最終濃度10mMまで加えることによりチオシアン酸グアニジニウムが変色しないように安定化した。
本実施例は、大腸菌培養物1〜3mlから出発して実施例1の樹脂を使用する標準プラスミド単離手順について記載する。
1.細胞再懸濁溶液:
50mM Tris−HCl,pH7.5
10mM EDTA
100μg/ml RNアーゼA(リボヌクレアーゼA)(DNアーゼ非含有)
2.カラム洗浄溶液:
(a)200mM NaCl,20mM Tris−HCl,5mM EDTA,pH7.5
(b)(a)1:1.4を95%EtOH(エタノール)で希釈
3.TE緩衝液:
10mM Tris−HCl,pH7.5
1mM EDTA
4.中和用溶液:
1.32M KOAc(酢酸カリウム),pH4.8
5.細胞溶解溶液:
0.2M NaOH
1%SDS(ドデシル硫酸ナトリウム)
B.清澄溶解物の生成
1.細胞1〜3mlをマイクロ遠心機で1〜2分間最高速度で遠心することによりペレット化する。細胞ペレットを細胞再懸濁溶液200μlに再懸濁する。再懸濁細胞をマイクロ遠心管に移す。
1.実施例1の樹脂1mlを段階B.5からの上清に加え、管を反転することにより混合する。アリコートを取り出す前に実施例1の樹脂を十分に混合する。必要であれば樹脂を25〜37℃まで(10分以下)昇温させ、結晶を溶解させる。30℃を越える温度では樹脂を使用しない。シリカゲル樹脂が多少沈降するが、シリカゲルの粒度が微細であるため、粒子はシリカゲルでなく珪藻土から作成した樹脂より長時間溶液に懸濁し続ける。
1.実施例1の樹脂1mlを段階B.5からの上清に加え、管を反転することにより混合する。アリコートを取り出す前に実施例1の樹脂を十分に混合する。必要であれば樹脂を25〜37℃まで(10分以下)昇温させ、結晶を溶解させる。30℃を越える温度では樹脂を使用しない。 2.各ミニプレップ毎に1本のミニカラム(上記C参照)を使用する。3ml容使い捨て注射器からプランジャーを取り外しておく。使い捨て注射器筒をミニカラムのルア−ロック伸長部に装着する。
本実施例は、実施例2の樹脂(懸濁液)を使用する標準DNAフラグメント精製プロトコルについて記載する。
カラム洗浄溶液:
水中80%(v/v)イソプロパノール
TE緩衝液:
10mM Tris−HCl,pH7.5
1mM EDTA
B.低融点/ゲル化点アガロース電気泳動
1.標準プロトコルを使用して低融点/ゲル化点アガロースゲル中でDNAサンプルを電気泳動及び染色する。例えばSambrookら,Molecular Cloning: A Laboratory Manual,Cold Spring Harbor Laboratory Press, Cold Spring Harbor, New York(1989)参照。
1.実施例2の樹脂1mlを段階B.3からの融解アガローススライスに加え、20秒間渦形成することにより混合する。
1.実施例2の樹脂1mlを段階B.3からの融解アガローススライスに加え、20秒間渦形成する。
本実施例は、M13ファージに感染した大腸菌の培養物1mlから出発して実施例1の樹脂を使用する1本鎖DNA(ssDNA)の精製用プロトコルについて記載する。
1.カラム洗浄溶液:
a)200mM NaCl,20mM Tris−HCl,5mM EDTA,pH7.5。
B.M13ファージに感染した大腸菌培養物からの上清
1.感染培養物1.5mlをマイクロ遠心管に移し、5分間回転させる。
1.実施例1の樹脂1mlを段階B.2からの上清に加え、反転により混合する。
1.実施例1の樹脂1mlを段階B.2からの上清に加え、反転により混合する。
標準手順により得たファージ溶解物から得たλファージのペレットを標準ファージ緩衝液(例えば150mM NaCl,40mM Tris−HCl,pH7.4,10mM MgSO4)0.5mlに再懸濁する。次に再懸濁したファージを1.5ml容マイクロ遠心管に移し、12,000×gで10秒間遠心して不溶性粒子を除去する。ペレットを撹乱しないように注意しながら上清を吸引し、新しい1.5ml容マイクロ遠心管に移す。上清は、本発明の分離及び単離方法を適用するDNA(この場合はパッケージλDNA)の水溶液である。実施例1の懸濁液1mlを加え、管を反転することにより混合する。
500bp PCR産物50ng〜15μgを実施例1又は実施例2の懸濁液1mlに加えると、95%を越える回収率が得られる。
RNAは実施例1の樹脂の代わりに下記樹脂を使用して実施例3の手順に従うことにより精製することができる。 超純粋グアニジン−HCl(米国、オハイオ州、クリーブランドに所在のAmresco製Amresco Ultropure)20kgを脱イオン蒸留水30Lに溶解することにより7Mグアニジン−HCl(即ち塩酸グアニジニウム)溶液を調製した。
本実施例は、実施例8の樹脂を使用する動物組織からのRNA単離手順について記載する。
1.50ml容厚壁ポリプロピレン遠心管を0.05%ピロ炭酸ジエチル(DEPC)中に室温で1時間置いた後、管を30分間オートクレーブに入れ、残留DEPCを分解させた。
最適性能を得るために、サンプルを得た直後にRNAを単離した。他方、サンプルを得た直後にRNAを単離しない場合には、サンプルを液体窒素中で凍結し、将来の使用に備えて−70℃で保存することができる。
1.破壊したサンプルに2M酢酸ナトリウム(pH4.0)1.2mlを加え、反転により十分に混合した。
1.等容量のイソプロピルアルコールを段階C.3の混合物に加え、少なくとも30分間−20℃でインキュベートし、RNAを沈殿させた。RNA含量が比較的少ないサンプルからRNAを沈殿させるには長時間沈殿(一晩まで)を使用すべきである。
1.段階D.4の沈殿RNAを10,000×gで15分間4℃で遠心することによりペレット化し、ペレットを氷冷75%エタノールで洗浄し、上記のように遠心した(段階E.1)。この段階には最低10mlの75%エタノールを使用すべきである。
その後、実施例3の段階C及びDのプロトコルに従って実施例8のRNA樹脂のいずれか一方1mlを使用することにより、RNAを精製することができる。
GF/A粉砕ガラス繊維、シリカゲル60−10及び7M塩酸グアニジン水溶液を使用して実施例1に記載したように対照樹脂を調製した。樹脂は0.35%(w/v)GF/Aと3.5%(w/v)シリカゲルを含有していた。この樹脂は培養物100〜1000mlからプラスミドDNAを単離するのに適している。
GF/A粉砕ガラス繊維、シリカゲル60−10及び7M塩酸グアニジン水溶液を使用して実施例1に記載したように対照樹脂を調製した。樹脂は0.14%(w/v)GF/Aと1.4%(w/v)シリカゲルを含有していた。この樹脂は培養物1〜3mlからプラスミドDNAを単離するのに適している。
Claims (10)
- (a)水溶液中に含まれる核酸をシリカゲルおよびガラス粒子よりなる組成物に結合させることを含み、シリカゲルのガラス粒子に対する比が重量で1:1〜100:1である、核酸を精製または分離する方法。
- (b)核酸が結合されたシリカゲルとガラス粒子の少なくとも1部分を水溶液から分離し;
(c)分離したシリカゲル、ガラス粒子および結合核酸を、結合核酸以外の汚染物質を効果的に除去する第2溶液で洗浄し;および
(d)結合核酸をシリカゲルおよびガラス粒子から溶離すること、を更に含む請求項1に記載の方法。 - ガラス粒子が実質的にガラス微細繊維よりなり、ガラス微細繊維1重量部に対してシリカゲルの重量比が5〜50重量部である請求項2に記載の方法。
- 水溶液がカオトロピック塩を更に含む請求項2に記載の方法。
- 水溶液がキレート化剤を更に含む請求項4に記載の方法。
- 段階(d)がTE緩衝液を使用して実施される請求項2に記載の方法。
- 分離される核酸がDNAである請求項1〜6のいずれか1項に記載の方法。
- 分離される核酸がRNAである請求項1〜6のいずれか1項に記載の方法。
- 50塩基より大きい長さの核酸を優先的に単離する請求項1〜6のいずれか1項に記載の方法。
- 段階(c)が、メタノール、エタノールおよびイソプロパノールからなる群から選択された20〜95容量%のアルコールを含む第2溶液で結合核酸を洗浄することを更に含み;および段階(d)が、6.5および8.5の間のpHを有する低塩緩衝液を含む第3溶液で結合核酸を溶離することを更に含む、請求項2に記載の方法。
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US11550493A | 1993-08-30 | 1993-08-30 |
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JP50831595A Division JP3696238B2 (ja) | 1993-08-30 | 1994-08-30 | 核酸精製用組成物及び方法 |
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JP2005304504A true JP2005304504A (ja) | 2005-11-04 |
JP4480622B2 JP4480622B2 (ja) | 2010-06-16 |
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JP50831595A Expired - Fee Related JP3696238B2 (ja) | 1993-08-30 | 1994-08-30 | 核酸精製用組成物及び方法 |
JP2005146671A Expired - Lifetime JP4480622B2 (ja) | 1993-08-30 | 2005-05-19 | 核酸精製用組成物及び方法 |
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JP50831595A Expired - Fee Related JP3696238B2 (ja) | 1993-08-30 | 1994-08-30 | 核酸精製用組成物及び方法 |
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US (2) | US5808041A (ja) |
EP (1) | EP0723549B1 (ja) |
JP (2) | JP3696238B2 (ja) |
AT (1) | ATE256735T1 (ja) |
AU (1) | AU689815B2 (ja) |
CA (1) | CA2170604C (ja) |
DE (1) | DE69433425T2 (ja) |
WO (1) | WO1995006652A1 (ja) |
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US5658548C1 (en) | 2001-07-24 |
AU689815B2 (en) | 1998-04-09 |
US5808041A (en) | 1998-09-15 |
AU8010094A (en) | 1995-03-22 |
CA2170604A1 (en) | 1995-03-09 |
EP0723549B1 (en) | 2003-12-17 |
JPH09505724A (ja) | 1997-06-10 |
WO1995006652A1 (en) | 1995-03-09 |
EP0723549A4 (en) | 1998-05-06 |
DE69433425T2 (de) | 2004-10-07 |
JP3696238B2 (ja) | 2005-09-14 |
CA2170604C (en) | 2007-03-13 |
EP0723549A1 (en) | 1996-07-31 |
ATE256735T1 (de) | 2004-01-15 |
JP4480622B2 (ja) | 2010-06-16 |
DE69433425D1 (de) | 2004-01-29 |
US5658548A (en) | 1997-08-19 |
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