JP7335200B2 - 二つのベクターから発現されたcas9タンパク質を利用した遺伝子発現調節方法 - Google Patents
二つのベクターから発現されたcas9タンパク質を利用した遺伝子発現調節方法 Download PDFInfo
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Description
本発明で、「重複」とは、ゲノム内に同じ遺伝子が2つまたはそれ以上存在することをいう。
本発明で、「逆位」とは、ゲノムの一部が元のゲノムと比較すると逆転して配置されたものをいう。
本発明で、「交換」とは、一つのヌクレオチド配列が互いに交換されること(つまり、情報を有する配列の交換)を意味し、必ずしも一つのポリヌクレオチドが他のポリニュークレテッドに化学的または物理的に交換されるだけを意味するものではない。
本発明で、「再配列」とは、染色体上の遺伝子の位置及び順序の変化を起こす構造的変化を意味し、トランスポゾンなど転移因子が挿入されることも含まれる。さらに、DNA分子内で塩基再配列による遺伝情報の変換を含むことができる。
本発明で、「Cas9タンパク質」は、CRISPR/Cas9システムの主要タンパク質構成要素で、crRNA(CRISPR RNA)及びtracrRNA(trans-activating crRNA)及び複合体を形成して活性化されたエンドヌクレアーゼまたはnickaseを形成する。
野生型(Wild-type,WT)Cas9(CRISPR associated protein 9)タンパク質(配列番号2)の中間部位に存在するdisordered linker(配列番号9;agcggccagggc;SGQGアミノ酸をエンコードするシーケンス)の中間部位を切断してSGアミノ酸とQGアミノ酸が第一のドメインと第二のドメインに各々連結された二つのハーフドメインを作製した。
前記実施例1で作製した各ハーフドメインを発現させる組換えベクターとCCR5、HPRT及びDMDの各遺伝子に対するsgRNA(single guide RNA)を発現する各プラスミドをリポフェクタミン(lipofectamin)を利用した形質注入でHela細胞内に伝達した。
ターゲット遺伝子のノックアウト効率を分析するために、ターゲットシーケンス部位をPCRで増幅させた後、next generation assayで標的配列を分析した。分析結果、HPRT遺伝子で27.1%、DMD遺伝子で23.75%、CCR5遺伝子で20.27%のIndel効果が現れた。対照群として、第一または第二のドメインの1つのハーフドメインのみ細胞内に注入して発現させ、このような場合には、Indelが現れなかった(図3)。
ターゲット遺伝子の非標的(off-target)効果を分析するために、細胞にsplit-Cas9と野生型Cas9プラスミドを各々処理した後、3日後にHBB遺伝子標的(on-target)配列と配列不一致を有している類似のシーケンス部位をPCRで増幅させた後、next generation assayで標的配列を分析した。
Split-Cas9がウイルスベクターを利用した場合にも効果的に作用するか否かを確認するために、第一のドメイン及び第二のドメインを各々アデノ随伴ウイルス(Adeno-associated virus)ベクタープラスミドにクローニングした(図5A及び5B)。
Claims (15)
- Cas9タンパク質のN-末端を含む第一のドメインを発現する組換えベクター及びCas9タンパク質のC-末端を含む第二のドメインを発現する組換えベクターを含む、組成物であって、前記第一のドメインのC-末端部位にスプライシングドナーを連結し、前記第二のドメインのN-末端部位にスプライシングアクセプタを連結し、前記Cas9タンパク質における配列番号10のリンカーの中間部位が切断され、前記Cas9タンパク質の前記第一のドメイン及び第二のドメインが作製され、そして前記第一のドメイン及び第二のドメインが融合し、完全なCas9タンパク質を形成する、組成物。
- 前記組成物は、遺伝子発現調節用であることを特徴とする請求項1に記載の組成物。
- 前記組成物は、配列特異的なガイドRNAをさらに含むことを特徴とする請求項1に記載の組成物。
- 前記Cas9タンパク質は、野生型Cas9、不活性化されたCas9(dCas9)またはCas9ニッカーゼ(nickase)である請求項1に記載の組成物。
- 前記不活性化されたCas9は、dCas9にFokIヌクレアーゼドメインを連結したRFN(RNA-guided FokI Nuclease)、または転写活性因子(transcription activator)または抑制ドメイン(repressor domain)を連結したdCas9である請求項4に記載の組成物。
- 前記Cas9ニッカーゼは、D10A Cas9またはH840A Cas9である請求項4に記載の組成物。
- 前記Cas9タンパク質は、ストレプトコッカス・ピオゲネス(Streptococcus pyogenes)、フランシセラ・ノビサイダ(Francisella novicida)、ストレプトコッカス・サーモフィルス(Streptococcus thermophilus)、レジオネラ・ニューモフィラ(Legionella pneumophila)、リステリア・イノキュア(Listeria innocua)、およびストレプトコッカス・ミュータンス(Streptococcus mutans)からなる群から選択されるいずれか一つの由来である請求項1に記載の組成物。
- 前記組換えベクターは、プラスミドベクター、コズミドベクター、またはウイルスベクターである請求項1に記載の組成物。
- 前記ウイルスベクターは、レトロウイルス(retrovirus)ベクター、アデノウイルス(adenovirus)ベクター、アデノ随伴ウイルス(adeno-associated virus)ベクター、および単純ヘルペスウイルス(herpes simplex virus)ベクターからなる群から選択されることを特徴とする請求項8に記載の組成物。
- 前記第一のドメイン及び第二のドメインが、前記導入された組換えベクターのそれぞれから発現され、前記第一のドメイン及び第二のドメインの融合によってCas9タンパク質が形成される、請求項1に記載の組成物。
- 前記第一のドメイン及び第二のドメインは、それぞれ400bp(base pair)~3.7kbp(kilo base pair)の大きさのヌクレオチドでコードされる請求項1に記載の組成物。
- 前記第一のドメイン及び第二のドメインは、それぞれNLS(nuclear localization signal)、HA-タグ(tag)配列、またはこれらの組み合わせをさらに含む請求項1に記載の組成物。
- 前記第一のドメインは、配列番号3のヌクレオチドでコードされ、第二のドメインは、配列番号5のヌクレオチドでコードされる請求項1に記載の組成物。
- 請求項1~13のいずれか一項に記載の組成物を含む遺伝子発現調節用キット。
- 前記キットは、配列特異的なガイドRNAをさらに含むことを特徴とする請求項14に記載のキット。
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| KR20140161809 | 2014-11-19 | ||
| KR10-2014-0161809 | 2014-11-19 | ||
| JP2017527208A JP2017534294A (ja) | 2014-11-19 | 2015-11-19 | 二つのベクターから発現されたcas9タンパク質を利用した遺伝子発現調節方法 |
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| JP2020081896A Active JP7335200B2 (ja) | 2014-11-19 | 2020-05-07 | 二つのベクターから発現されたcas9タンパク質を利用した遺伝子発現調節方法 |
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| US (1) | US10858662B2 (ja) |
| EP (1) | EP3222728B1 (ja) |
| JP (2) | JP2017534294A (ja) |
| KR (2) | KR20160059994A (ja) |
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| US10323236B2 (en) | 2011-07-22 | 2019-06-18 | President And Fellows Of Harvard College | Evaluation and improvement of nuclease cleavage specificity |
| US9163284B2 (en) | 2013-08-09 | 2015-10-20 | President And Fellows Of Harvard College | Methods for identifying a target site of a Cas9 nuclease |
| US9359599B2 (en) | 2013-08-22 | 2016-06-07 | President And Fellows Of Harvard College | Engineered transcription activator-like effector (TALE) domains and uses thereof |
| US9526784B2 (en) | 2013-09-06 | 2016-12-27 | President And Fellows Of Harvard College | Delivery system for functional nucleases |
| US9322037B2 (en) | 2013-09-06 | 2016-04-26 | President And Fellows Of Harvard College | Cas9-FokI fusion proteins and uses thereof |
| US9228207B2 (en) | 2013-09-06 | 2016-01-05 | President And Fellows Of Harvard College | Switchable gRNAs comprising aptamers |
| US20150165054A1 (en) | 2013-12-12 | 2015-06-18 | President And Fellows Of Harvard College | Methods for correcting caspase-9 point mutations |
| US10077453B2 (en) | 2014-07-30 | 2018-09-18 | President And Fellows Of Harvard College | CAS9 proteins including ligand-dependent inteins |
| IL310721B2 (en) | 2015-10-23 | 2025-11-01 | Harvard College | Nucleobase editors and uses thereof |
| CN110214183A (zh) | 2016-08-03 | 2019-09-06 | 哈佛大学的校长及成员们 | 腺苷核碱基编辑器及其用途 |
| WO2018031683A1 (en) | 2016-08-09 | 2018-02-15 | President And Fellows Of Harvard College | Programmable cas9-recombinase fusion proteins and uses thereof |
| US11542509B2 (en) | 2016-08-24 | 2023-01-03 | President And Fellows Of Harvard College | Incorporation of unnatural amino acids into proteins using base editing |
| KR102622411B1 (ko) | 2016-10-14 | 2024-01-10 | 프레지던트 앤드 펠로우즈 오브 하바드 칼리지 | 핵염기 에디터의 aav 전달 |
| WO2018119359A1 (en) | 2016-12-23 | 2018-06-28 | President And Fellows Of Harvard College | Editing of ccr5 receptor gene to protect against hiv infection |
| US12390514B2 (en) | 2017-03-09 | 2025-08-19 | President And Fellows Of Harvard College | Cancer vaccine |
| EP3592853A1 (en) | 2017-03-09 | 2020-01-15 | President and Fellows of Harvard College | Suppression of pain by gene editing |
| US11542496B2 (en) | 2017-03-10 | 2023-01-03 | President And Fellows Of Harvard College | Cytosine to guanine base editor |
| KR20240116572A (ko) | 2017-03-23 | 2024-07-29 | 프레지던트 앤드 펠로우즈 오브 하바드 칼리지 | 핵산 프로그램가능한 dna 결합 단백질을 포함하는 핵염기 편집제 |
| US11560566B2 (en) | 2017-05-12 | 2023-01-24 | President And Fellows Of Harvard College | Aptazyme-embedded guide RNAs for use with CRISPR-Cas9 in genome editing and transcriptional activation |
| CN111801345A (zh) | 2017-07-28 | 2020-10-20 | 哈佛大学的校长及成员们 | 使用噬菌体辅助连续进化(pace)的进化碱基编辑器的方法和组合物 |
| EP3676376B1 (en) | 2017-08-30 | 2025-01-15 | President and Fellows of Harvard College | High efficiency base editors comprising gam |
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| CN107109422B (zh) | 2021-08-13 |
| EP3222728B1 (en) | 2021-07-14 |
| WO2016080795A1 (ko) | 2016-05-26 |
| KR20160059994A (ko) | 2016-05-27 |
| JP2017534294A (ja) | 2017-11-24 |
| KR20180012834A (ko) | 2018-02-06 |
| KR102021585B1 (ko) | 2019-09-16 |
| EP3222728A1 (en) | 2017-09-27 |
| CN107109422A (zh) | 2017-08-29 |
| US20170349905A1 (en) | 2017-12-07 |
| JP2020141683A (ja) | 2020-09-10 |
| US10858662B2 (en) | 2020-12-08 |
| EP3222728A4 (en) | 2018-09-12 |
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