JP4481017B2 - 植物体内で機能するires - Google Patents
植物体内で機能するires Download PDFInfo
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- JP4481017B2 JP4481017B2 JP2004008025A JP2004008025A JP4481017B2 JP 4481017 B2 JP4481017 B2 JP 4481017B2 JP 2004008025 A JP2004008025 A JP 2004008025A JP 2004008025 A JP2004008025 A JP 2004008025A JP 4481017 B2 JP4481017 B2 JP 4481017B2
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- 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
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
- C12N15/8216—Methods for controlling, regulating or enhancing expression of transgenes in plant cells
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Description
Chappell SA, Edelman GM, Mauro VP, A 9-nt segment of a cellular mRNA can function as an internal ribosome entry site (IRES) and when present in linked multiple copies greatly enhances IRES activity. PNAS 97, 1536-1541. Urwin P, Yi L, Martin H, Atkinson H, Gilmartin PM, Functional characterization of the EMCV IRES in plants. Plant J. 24, 583-589
(1) 植物内でIRES(internal ribosome entry site)として機能する以下の(a)又は(b)のDNAを含むポリヌクレオチド。
(a)配列番号1、2、3又は4に示す塩基配列からなるDNA
(b)配列番号1、2、3又は4に示す塩基配列において1又は複数の塩基が置換、欠失、付加及び挿入された塩基配列からなり、植物内で翻訳方向に向かって下流に配置された遺伝子の翻訳を正に調節する機能を有するDNA
(2) スペーサー配列を介して又はスペーサー配列を介さずに上記(a)又は(b)のDNAを繰り返して連結してなる(1)記載のポリヌクレオチド。
(3) 上記(a)又は(b)のDNAの繰り返し回数が7〜10回であることを特徴とする(2)記載のポリヌクレオチド。
(4) 少なくとも、遺伝子及び/又はプロモーターを更に含むことを特徴とする(1)乃至(3)いずれか一項記載のポリヌクレオチド。
(5) (1)乃至(4)いずれか一項記載のポリヌクレオチドを含むベクター。
(6) (1)乃至(4)いずれか一項記載のポリヌクレオチド又は(5)記載のベクターにより形質転換された形質転換体。
(7) (1)乃至(4)いずれか一項記載のポリヌクレオチドをゲノムに組み込んでなるトランスジェニック植物。
(8) (1)乃至(4)いずれか一項記載のポリヌクレオチド又は(5)記載のベクターを構築する工程と、上記ポリヌクレオチド又は上記ベクターを植物由来宿主に形質転換する工程とを備え、形質転換された植物由来宿主内で、上記(a)又は(b)のDNAの下流に位置する遺伝子の翻訳を正に制御することを特徴とする植物内における遺伝子発現調節方法。
1−1.本発明に係るポリヌクレオチド
先ず、本発明に係るポリヌクレオチドは、以下の(a)及び/又は(b)のDNAを含むものであり、当該DNAの下流に位置する遺伝子の翻訳を植物内で正に制御する機能を有する。
(a)配列番号1に示す塩基配列からなるDNA
(b)配列番号1に示す塩基配列において1又は複数の塩基が置換、欠失、付加及び挿入された塩基配列からなり、翻訳方向に向かって下流に配置された遺伝子の翻訳を正に調節する機能を有するDNA
配列番号5:GCCAGCGGAGTC
配列番号6:GCCAGCGGAGTC
配列番号7:GCCGGCGGAGTC
配列番号8:GCCGGCGGAGTC
配列番号9:GCCGGCGGAGTC
配列番号10:GCCGGCGGAGTC
配列番号11:GCCAGCGGGGTC
配列番号12:GCCGGCGGAGTC
配列番号13:GCTGGCGGAGTC
配列番号14:GCTGGCAGGGTC
配列番号15:ACGGCTCGGGTC
配列番号16:ACCGAGTGGGTC
配列番号17:GCCGAGCAAGTC
配列番号18:GCCCGGCGGGTC
配列番号19:GCCCGGCGGGTC
配列番号20:GCCCGGCGGGTC
本発明に係るポリヌクレオチドは、以下の(a)及び/又は(b)のDNAを含むものであり、当該DNAの下流に位置する遺伝子の翻訳を植物体内で正に制御する機能を有する。
(a)配列番号2又は3に示す塩基配列からなるDNA
(b)配列番号2又は3に示す塩基配列において1又は複数の塩基が置換、欠失、付加及び挿入された塩基配列からなり、植物内で翻訳方向に向かって下流に配置された遺伝子の翻訳を植物体内で正に調節する機能を有するDNA
本発明に係るポリヌクレオチドは、以下の(a)及び/又は(b)のDNAを含むものであり、当該DNAの下流に位置する遺伝子の翻訳を植物体内で正に制御する機能を有する。
(a)配列番号4に示す塩基配列からなるDNA
(b)配列番号4に示す塩基配列において1又は複数の塩基が置換、欠失、付加及び挿入された塩基配列からなり、植物内で翻訳方向に向かって下流に配置された遺伝子の翻訳を植物体内で正に調節する機能を有するDNA
本発明に係るポリヌクレオチドは、上記「1−1〜3.本発明に係るポリヌクレオチド」で説明したIRESを有する発現ユニットの形で機能的に実現することができる。すなわち、発現ユニットは、上記「1−1〜3.本発明に係るポリヌクレオチド」で説明したIRESと、少なくともプロモーター及び/又は遺伝子とを含む構成とすることができる。
上記「2.発現ユニット」で説明した発現ユニット、又は当該発現ユニットを含む組換えベクターを構築し、この発現ユニット又は組換えベクターを用いて植物細胞を形質転換し、形質転換植物細胞を定法に従って植物体に成長させることによって、トランスジェニック植物を作出することができる。
ナス科:タバコ(Nicotiana tabacum)、ジャガイモ(Solanum tuberosum)
イネ科:トウモロコシ(Zea mays) 、イネ(Oryza sativa)
アオイ科:ワタ(Gossypium hirsutum) 、オクラ(Abelmoscus esculentum)
アブラナ科:シロイヌナズナ(Arabidopsis thaliana)、ナタネ(Brassica napus)
キク科:ヒマワリ(Helianthus annuus) 、キク(Crysanthimum indicum)
ゴマ科:ゴマ(Sesame indica) 、ヒマ(Ricinus communis)
モクセイ科:オリーブ(Olea europaea) 、
フトモモ科:ユーカリ(Eucalyptus globulus)、グアバ(Psidium guava)
バラ科:バラ(Rosa sinnis)
ツバキ科:ツバキ(Camellia japonica)
マメ科:レンゲソウ(Astragalus sinicus)、ダイズ(Glycine max)
ヤシ科:ココナツ(Cocos nucifera)
アオギリ科:カカオ(Theobroma cacao)
アカネ科:コーヒーの木(Coffea arabica)
先ず、発現ユニットを有する発現ベクターを以下のように構築した。なお、本例で用いた発現ユニットを図3に模式的に示す。なお、図3中、「P35S」はCaMV 35Sプロモーターであり、「RLUC」はウミシイタケ由来のルシフェラーゼをコードする遺伝子であり、「LUC」は蛍由来のルシフェラーゼをコードする遺伝子であり、「T3A」はターミネータ配列である。
実施例1で調製した発現ベクターを用いて、以下のようにしてトランスジェニック植物を作出した。
Dipping溶液(組成)
0.044μM ベンジルアミノプリン
5% Sucrose
0.02% Silwet L-77
1/2 X MS塩
1/2 X Gamborg B5 ビタミン
0.5g/l MES
実施例2で作出したトランスジェニック植物における、ウミシイタケ由来ルシフェラーゼ及び蛍由来ルシフェラーゼの蛍光量を、以下のように測定した。
Claims (7)
- 植物内でIRES(internal ribosome entry site)として機能し、スペーサー配列を介さずに以下の(a)又は(b)のDNAを繰り返して連結してなるポリヌクレオチド。
(a)配列番号1に示す塩基配列からなるDNA
(b)配列番号1に示す塩基配列において1又は2の塩基が置換された塩基配列からなり、植物内で翻訳方向に向かって下流に配置された遺伝子の翻訳を正に調節する機能を有するDNA - 上記(a)又は(b)のDNAの繰り返し回数が2〜15回であることを特徴とする請求項1記載のポリヌクレオチド。
- 少なくとも、遺伝子及び/又はプロモーターを更に含むことを特徴とする請求項1又は2記載のポリヌクレオチド。
- 請求項1乃至3いずれか一項記載のポリヌクレオチドを含むベクター。
- 請求項1乃至3いずれか一項記載のポリヌクレオチド又は請求項4記載のベクターにより形質転換された形質転換体。
- 請求項1乃至3いずれか一項記載のポリヌクレオチドをゲノムに組み込んでなるトランスジェニック植物。
- 請求項1乃至3いずれか一項記載のポリヌクレオチド又は請求項4記載のベクターを構築する工程と、
上記ポリヌクレオチド又は上記ベクターを植物由来宿主に形質転換する工程とを備え、
形質転換された植物由来宿主内で、上記(a)又は(b)のDNAの下流に位置する遺伝子の翻訳を正に制御することを特徴とする植物内における遺伝子発現調節方法。
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JP2004008025A JP4481017B2 (ja) | 2004-01-15 | 2004-01-15 | 植物体内で機能するires |
EP05703522.2A EP1712624B1 (en) | 2004-01-15 | 2005-01-13 | Ires functioning in plant |
PCT/JP2005/000283 WO2005068631A1 (ja) | 2004-01-15 | 2005-01-13 | 植物体内で機能するires |
US10/586,052 US8772465B2 (en) | 2004-01-15 | 2005-01-13 | IRES functioning in plant |
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US8772465B2 (en) | 2014-07-08 |
EP1712624A4 (en) | 2008-04-02 |
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EP1712624B1 (en) | 2014-07-09 |
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