JP6916188B2 - プロトプラストからの全植物体の製造方法 - Google Patents
プロトプラストからの全植物体の製造方法 Download PDFInfo
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Description
[発明を実施するための形態]
核位置信号が接続されてCas9タンパク質はToolGen、Inc.(South Korea)から購入した。Phusionポリメラーゼ(表1−4)を使用したオリゴ−延長(oligo−extension)を介してガイドRNA転写の鋳型を製造した。T7 RNAポリメラーゼ(New England Biolabs)を使用したラン−オフ(run−off)反応でガイドRNAsを試験管内で転写した。反応混合物は、1X DNase I反応バッファーに含まれているDNase I(New England Biolabs)で処理した。転写されたsgRNAsの品質を評価するためにSYBR gold染色(Invitrogen)された8%変性尿素−ポリアクリルアミドゲル(urea−polyacryl amide gel)でsgRNAsを確認した。転写されたsgRNAsをMGTM PCR Product Purification SV(Macrogen)で精製し、分光光度計でsgRNAsの量を測定した。
本発明は一態様において、以下を提供する。
[項目1]
植物プロトプラスト(protoplast)の一つ以上の内在的遺伝子をノックアウトまたはノックインする段階を含む、植物プロトプラストから植物体を製造する方法。
[項目2]
前記植物の内在的遺伝子は、前記ノックアウトまたはノックインによりストレス抵抗性を増加させる遺伝子である、項目1に記載の方法。
[項目3]
前記植物の内在的遺伝子は、植物のブラシノステロイド(brassinosteroid)シグナル伝達に関与する遺伝子である、項目1に記載の方法。
[項目4]
(i)前記ノックアウトの段階において、内在的遺伝子はBIN2遺伝子、BKI1遺伝子、及びこれらのホモログ遺伝子からなる群から選択される1つ以上であり、
(ii)前記ノックインの段階において、内在的遺伝子はBRI1遺伝子、BSU遺伝子、BZR1遺伝子、DWF4遺伝子、CYP85A1、およびこれらのホモログ遺伝子からなる群から選択される1つ以上である、項目1に記載の方法。
[項目5]
前記遺伝子のノックアウトは、BIN2遺伝子、BKI1遺伝子、及びこれらのホモログ遺伝子からなる群から選択される1つ以上の遺伝子のアレルの中いずれか一つまたは二つをノックアウトすることである、項目1に記載の方法。
[項目6]
前記遺伝子のノックアウトは、遺伝子ノックアウトにより実行され、前記遺伝子のノックインは、遺伝子ノックインにより実行される、項目1に記載の方法。
[項目7]
前記遺伝子のノックアウトは、BIN2遺伝子、BKI1遺伝子、及びこれらのホモログ遺伝子からなる群から選択される1つ以上の遺伝子に特異的な人工ヌクレアーゼ(engineered nuclease)を利用して実行される、項目1に記載の方法。
[項目8]
前記人工ヌクレアーゼは、ジンクフィンガーヌクレアーゼ(ZFN)、転写アクチベーター様エフェクターヌクレアーゼ(TALEN)、およびRNAガイド人工ヌクレアーゼ(RGEN)からなる群から選択される、項目7に記載の方法。
[項目9]
前記RGENは、BIN2遺伝子、BKI1遺伝子、及びこれらのホモログ遺伝子からなる群から選択される1つ以上の遺伝子の特定配列に特異的に結合するガイドRNA、または前記ガイドRNAをコードするDNA、並びにCasタンパク質をコードする核酸またはCasタンパク質を含む、項目8に記載の方法。
[項目10]
前記遺伝子のノックアウトは、BIN2遺伝子、BKI1遺伝子、及びこれらの同族体ホモログ遺伝子からなる群から選択される1つ以上の遺伝子の特定配列に特異的に結合するガイドRNAまたは前記ガイドRNAをコードするDNA;並びにCasタンパク質をコードする核酸またはCasタンパク質を、植物プロトプラストに導入することで実行される、項目1に記載の方法。
[項目11]
前記ガイドRNAはcrRNAとtracrRNAを含む二重RNA(dual RNA)または単一鎖ガイドRNA(sgRNA)の形態である、項目10に記載の方法。
[項目12]
前記単一鎖ガイドRNAはcrRNA及びtracrRNAの一部を含む、項目11に記載の方法。
[項目13]
前記単一鎖ガイドRNAは、単離されたRNAの形態である、項目10に記載の方法。
[項目14]
前記ガイドRNAをコードするDNAはベクターにコードされており、前記ベクターは、ウイルスベクター、プラスミドベクター、またはアグロバクテリウムベクターである、項目10に記載の方法。
[項目15]
前記Casタンパク質はCas9タンパク質またはその変異体である、項目10に記載の方法。
[項目16]
前記Casタンパク質は、NGGトリヌクレオチド(trinucleotide)を認識する、項目10に記載の方法。
[項目17]
前記Casタンパク質は、タンパク質伝達ドメイン(protein transduction domain)に接続されている、項目10に記載の方法。
[項目18]
前記Cas9タンパク質の変異体は、触媒アスパラギン酸(aspartate)残基が他のアミノ酸に置換されたCas9の変異体である、項目15に記載の方法。
[項目19]
前記アミノ酸は、アラニン(alanine)である、項目18に記載の方法。
[項目20]
前記Casタンパク質をコードする核酸またはCasタンパク質は、ストレプトコッカス属(genus Streptococcus)由来のものである、項目10に記載の方法。
[項目21]
前記ストレプトコッカス属はストレプトコッカスピヨジェンス(Streptococcus pyogenes)である、項目20に記載の方法。
[項目22]
前記植物プロトプラストはレタス(Lactuca sativa)由来のものである、項目1に記載の方法。
[項目23]
前記導入はCasタンパク質をコードする核酸またはCasタンパク質、及び前記ガイドRNAまたはガイドRNAをコードするDNAを、植物プロトプラストに同時形質導入する(co−transfecting)または連続形質導入(serial−transfecting)するものである、項目10に記載の方法。
[項目24]
前記連続形質導入は、Casタンパク質またはCasタンパク質をコードする核酸を初めに形質導入した後、ネイキッドガイドRNA(naked guide RNA)を二番目に形質導入することで実行される、項目23に記載の方法。
[項目25]
前記導入は、微細注入法、電気穿孔法、DEAE−デキストラン処理、リポフェクション、ナノパーティクル−媒介性形質導入、タンパク質形質導入ドメイン媒介性形質導入、およびPEG−媒介形質導入からなる群から選択される方法で実行される、項目10に記載の方法。
[項目26]
遺伝子がノックアウトされた植物プロトプラストを再生させる段階をさらに含む、項目1に記載の方法。
[項目27]
前記再生させる段階は、BIN2遺伝子、BKI1遺伝子、及びこれらのホモログ遺伝子からなる群から選択される1つ以上の遺伝子がノックアウトされた植物プロトプラストを、アガロースを含む培地中で培養してカルス(callus)を形成させる段階、及び前記カルスを再生培地で培養する段階を含む、項目26に記載の方法。
[項目28]
項目1〜27のいずれか一項に記載の方法によって調製されたゲノム編集された植物プロトプラストから再生された植物。
[項目29]
BIN2(brassinosteroid Insensitive 2)遺伝子、BKI1遺伝子またはこれらのホモログをコードするDNAに特異的なガイドRNA、または前記ガイドRNAをコードするDNA;並びにCasタンパク質をコードする核酸またはCasタンパク質を含む、植物細胞においてBIN2遺伝子をコードするDNAを切断するための組成物。
[項目30]
植物細胞で標的変異(targeted mutagenesis)を誘導する、項目29に記載の組成物。
[項目31]
BIN2(brassinosteroid Insensitive 2)遺伝子、BKI1遺伝子またはこれらのホモログをコードするDNAに特異的なガイドRNAまたは前記ガイドRNAをコードするDNA;並びにCasタンパク質をコードする核酸またはCasタンパク質を含む、植物プロトプラストから植物体を製造するための組成物。
[項目32]
項目29〜30のいずれか一項に記載の組成物を含む、植物プロトプラストから植物体を製造するためのキット。
Claims (13)
- 予め組み立てられたCas9タンパク質−ガイドRNA RNP(ribonucleoprotein)を導入することにより、植物プロトプラスト(protoplast)の一つ以上の内在的遺伝子をノックアウトする段階を含む、植物プロトプラストから植物体を製造する方法であって、前記ガイドRNAはPHYB、BRI1またはBIN2に特異的に結合し、前記ガイドRNAは、配列番号85、89、90、または91の配列を含む、前記方法。
- 前記ガイドRNAはベクターにコードされており、前記ベクターは、ウイルスベクター、プラスミドベクター、またはアグロバクテリウムベクターである、請求項1に記載の方法。
- 前記Cas9タンパク質は、NGGトリヌクレオチド(trinucleotide)を認識する、請求項1に記載の方法。
- 前記Cas9タンパク質は、タンパク質伝達ドメイン(protein transduction domain)に接続されている、請求項1に記載の方法。
- 前記Cas9タンパク質は、ストレプトコッカス属(genus Streptococcus)の微生物由来のものである、請求項1に記載の方法。
- 前記ストレプトコッカス属の微生物はストレプトコッカスピヨジェンス(Streptococcus pyogenes)である、請求項5に記載の方法。
- 前記植物プロトプラストはレタス(Lactuca sativa)由来のものである、請求項1に記載の方法。
- 前記導入は、微細注入法、電気穿孔法、DEAE−デキストラン処理、リポフェクション、ナノパーティクル−媒介性形質導入、タンパク質形質導入ドメイン媒介性形質導入、およびPEG−媒介形質導入からなる群から選択される方法で実行される、請求項1に記載の方法。
- 遺伝子がノックアウトされた植物プロトプラストを再生させる段階をさらに含む、請求項1に記載の方法。
- 前記再生させる段階は、1つ以上の遺伝子がノックアウトされた植物プロトプラストを、アガロースを含む培地中で培養してカルス(callus)を形成させる段階、及び前記カルスを再生培地で培養する段階を含む、請求項9に記載の方法。
- 請求項1〜10のいずれか一項に記載の方法によって調製されたゲノム編集された植物プロトプラストから再生された植物。
- 植物プロトプラストのPHYB、BRI1またはBIN2遺伝子をノックアウトする段階を含む、植物プロトプラストから植物体を製造する方法に用いるための組成物であって、予め組み立てられたCas9タンパク質−ガイドRNA RNP(ribonucleoprotein)を含有し、前記ガイドRNAは、PHYB、BRI1またはBIN2遺伝子に特異的に結合し、前記ガイドRNAは、配列番号85、89、90、または91の配列を含む、前記組成物。
- 植物細胞で標的変異(targeted mutagenesis)を誘導する、請求項12に記載の組成物。
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