JP6211702B2 - ヒト殺虫遺伝子およびそれによりコードされた殺虫ペプチドならびに用途 - Google Patents
ヒト殺虫遺伝子およびそれによりコードされた殺虫ペプチドならびに用途 Download PDFInfo
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- JP6211702B2 JP6211702B2 JP2016535244A JP2016535244A JP6211702B2 JP 6211702 B2 JP6211702 B2 JP 6211702B2 JP 2016535244 A JP2016535244 A JP 2016535244A JP 2016535244 A JP2016535244 A JP 2016535244A JP 6211702 B2 JP6211702 B2 JP 6211702B2
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Images
Classifications
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- A—HUMAN NECESSITIES
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- A01N47/40—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides
- A01N47/42—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having a double or triple bond to nitrogen, e.g. cyanates, cyanamides containing —N=CX2 groups, e.g. isothiourea
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- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
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- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/12—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from bacteria
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- C—CHEMISTRY; METALLURGY
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- C07K16/42—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against immunoglobulins
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- C07K16/4233—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against immunoglobulins against an idiotypic determinant on Ig against anti-bacterial Ig
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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
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- C12N15/8261—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield
- C12N15/8271—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance
- C12N15/8279—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance for biotic stress resistance, pathogen resistance, disease resistance
- C12N15/8286—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance for biotic stress resistance, pathogen resistance, disease resistance for insect resistance
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
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- C07K2317/00—Immunoglobulins specific features
- C07K2317/60—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments
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- C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
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Description
ヌクレオチド配列が配列番号1で示される、ヒト殺虫遺伝子。
アミノ酸配列が配列番号2で示される、本発明に記載のヒト殺虫遺伝子にコードされた殺虫ペプチド。
本発明に記載のヒト殺虫遺伝子を含有する原核細胞用担体。
本発明に記載のヒト殺虫遺伝子にコードされた殺虫ペプチドの農作物害虫防除の面の用途。
本発明に記載のヒト殺虫遺伝子にコードされた殺虫ペプチドを含有する殺虫剤。
(1)2×TY液体培地:
再蒸留水900mLにトリプトン16g、酵母抽出物10gおよびNaCl 5gを加え、撹拌して均等に混合し、再蒸留水で1Lに定容し、オートクレーブに入れ、121℃で20分間滅菌し、冷却した後、使用に備えて4℃で保存した。
(2)2×TY−AG液体培地:
2×TYの培地に最終濃度100μg/mlのアンピシリンおよび質量比1%のグルコースを加えた。
(3)2×TY−AK液体培地:
2×TYの培地に最終濃度100μg/mlのアンピシリン、50μg/mlのカナマイシンを加えた。
(4)2×TY−AKG液体培地:
2×TYの培地に最終濃度100μg/mlのアンピシリン、50μg/mlのカナマイシンおよび質量比1%のグルコースを加えた。
(5)TYE寒天培地:
再蒸留水900mlにアガロース15.0g、NaCl 8g、トリプトン10g、酵母抽出物5gを加え、再蒸留水で1Lに定容し、オートクレーブに入れ、121℃で20分間滅菌し、冷却した後、使用に備えて4℃で保存した。
(6)TYE−AG寒天培地:
TYE寒天培地に最終濃度100μg/mlのアンピシリンおよび質量比1%のグルコースを加えた。
NaCl 8.0g、KCl 0.2g、Na2HPO4・12H2O 2.9g、KH2PO4 0.2gを秤取し、それぞれ蒸留水の中に加え、充分に溶解した後、1Lに定容した。
(8)PBST溶液
0.05%PBSTは、PBS溶液に体積比0.05%のTween−20を加えたものである。
0.1%PBSTは、PBS溶液に体積比0.1%のTween−20を加えたものである。
(9)PEG/NaCl溶液:
PEG 8 000 20g、NaCl 14.61gを秤取し、脱イオン水80mlを加え、100mlに定容し、オートクレーブに入れ、121℃で20分間滅菌し、冷却した後、使用に備えて4℃で保存した。
(10)クエン酸塩緩衝液(CPBS、基質緩衝液、pH5.5):
C6H7O8(クエン酸)21g、Na2HPO4・12H2O 71.6gを取り、それぞれ蒸留水に加え、充分溶解した後、1Lに定容した。
(11)テトラメチルベンジジン(TMB)溶液:
テトラメチルベンジジン10mgを秤取してジメチルスルホキシド1mlに溶かし、光を避け、使用に備えて4℃で保存した。
(12)基質呈色溶液:
10ml配合成分:CPBS 9.875ml、TMB溶液 100μl、体積比が20%のH2O2 25μl。
(13)3%のMPBS溶液:
脱脂粉乳3gを秤取し、PBS溶液80mlに溶解し、PBS溶液を加え、100mlに定容した。
実施例に記載のHRP−ヤギ抗ウサギIgGは、3%のMPBS溶液で希釈したものである。
BBMV、関連しない抗イディオタイプ一本鎖抗体、「β」タイプ以外のAnti−Id ScFv、キャベツの葉、コナガ三齢幼虫は、いずれも江蘇省農業科学院農業部農産品品質安全制御技術・規格重点実験室が提供した。
陰性血清:1.5〜2.0kgの純種雄ニュージーランドホワイトから採取し、採取時間は免疫の1週間前とした。
抗Cry2Aaポリクローナル抗体:Cry2Aタンパク質標準品(上海佑隆生物科技有限公司)を免疫原とし、1.5〜2.0kgの純種雄ニュージーランドホワイト3匹を実験動物として選択し、具体的な免疫手順は次の通りとした。最初の免疫は、1匹あたり200mgの免疫原を用いて等体積の完全フロイントアジュバントと混合し、乳化して油中水構造にした後、背部皮下多点注射(40点前後)を行い、2週間後に同様の用量の免疫原を用いて、等体積の不完全フロイントアジュバントと増強を行い、この後、2週間に1回増強した。最後の1回は、等体積の生理食塩水で免疫原を希釈し、直接耳介辺縁に静脈注射し、8日後に心臓採血し、血清を調製した。最終濃度0.01%のチメロサールを添加した後、血清を、「現代免疫学技術と応用」(巴徳年、北京医科大学、中国協和医科大学聯合出版社、1998.309−322)に記載の方法で精製し、抗Cry2Aaポリクローナル抗体を得た。
HRP−ヤギ抗M13−IgGは、武漢博士徳社から購入した。
Cry2Aa毒素およびCry1Ab毒素は、上海佑隆生物科技有限公司から購入した。
イネの葉およびコブノメイガ三齢幼虫は、揚州緑源生物化工有限公司が提供した。
(1)ヒト化されたファージ抗体ライブラリ菌液20μlを取り、2×TY−AG液体培地200mlに加え、OD600が0.4になるまで37℃で恒温培養し、菌液50mlを取り、1×1012 pfuヘルパーファージKM13を加え、重複感染を行い、37℃で30分間培養した後、3300gで10分間遠心し、上澄液を廃棄し、2×TY−AKG液体培地100mlで再懸濁して沈殿させ、30℃で一晩培養した。翌日、3300gで30分間遠心し、上澄液を収集し、PEG/NaCl溶液20mlを加え、1時間氷浴した後、再び3300gで30分間遠心し、PBS 4mlを用いて再懸濁して沈殿させた。再懸濁液を11600gで10分間遠心し、上澄液を増幅したファージ抗体ライブラリとした。
1回目の選択は、先ず100μg/mlの陰性血清4mLと100μg/mlの抗Cry2Aaポリクローナル抗体4mLでそれぞれ負の細胞培養ボトルおよび正の細胞培養ボトルの底部を被覆し、4℃で一晩置き、翌日、先ずPBSで負の細胞培養ボトルを3回洗浄した後、ステップ1で得た増幅したファージ抗体ライブラリ1ml、3%のMPBS溶液4mlを加え、シェーカーに置き、室温でゆっくりと1時間振盪し、さらに1時間静置し、PBSで正の細胞培養ボトルを洗浄し、さらに1時間静置した負の細胞培養ボトルの中の液体を正の細胞培養ボトルの中に吸い入れ、シェーカーに置き、室温でゆっくりと1時間振盪し、さらに1時間静置した後、正の細胞培養ボトルの中の液体を廃棄し、0.05%PBST溶液1mlで正のボトルを10回洗浄し、10mg/mlのトリプシン(Trypsin)1mlを加えて、特異的に結合したファージ抗体を溶出し、溶出時間は30分間とし、溶出液を1回目のパンニングのファージ抗体とした。
2回目、3回目、4回目のパンニングで被覆した抗Cry2Aaポリクローナル抗体および陰性血清の濃度は、依然として100μg/mlとし、用いたファージ抗体は、前回のパンニングで得られたファージ抗体であり、パンニング方法は、1回目の正負の選択方針を用いた。異なっているのは、2回目では、0.1%PBST溶液を用いて正のボトルを10回洗浄し、10mg/mlのトリプシン(Trypsin)1mlを加えた後、1時間競合溶出し、3回目、4回目では、いずれも0.1%PBST溶液を用いて正のボトルを20回洗浄した後、トリプシンの代わりに濃度100μg/mlのCry2Aaポリクローナル抗体500μlを加えて競合溶出し、3回目の競合溶出時間は1時間、4回目の競合溶出時間は30分間としたことである。
4回目のパンニングのファージ抗体10μlを取り、対数増殖期にあるTG1細菌1mlに感染させ、37℃で1時間培養した後、TYE−AG寒天培地に塗布し、37℃で一晩培養した。翌日、シングルコロニーを無作為にピックアップし、100μl/ウェルの2×TY−AG液体培地を含む96ウェルプレートに接種し、37℃で一晩培養した。翌日、ウェルの中から菌液を2μl吸い出し、新しい96ウェルプレートのウェルの中に移し、37℃で2時間培養した。各ウェルに力価1012のヘルパーファージKM13を25μl加え、30℃で2時間培養し、1800gで10分間遠心し、2×TY−AK液体培地150μlで再懸濁し沈殿させた後、30℃で一晩培養した。翌日、1800gで30分間遠心し、それぞれ上澄液を取った。
ccggcccttt ggcatgcaat ttctatttca ggagacagtc ataatgaaat acctattgcc 60
tacggcagcc gctggattgt tattactcgc ggcccagccg gccatggccg aggtgcagct 120
gttggagtct gggggaggct tggtacagcc tggggggtcc ctgagactct cctgtgcagc 180
ctctggattc acctttagca gctatgccat gagctgggtc cgccaggctc cagggaaggg 240
gctggagtgg gtctcaagta ttgattctta tggtactaat acagattacg cagactccgt 300
gaagggccgg ttcaccatct ccagagacaa ttccaagaac acgctgtatc tgcaaatgaa 360
cagcctgaga gccgaggaca cggccgtata ttactgtgcg aaagctttta attcttttga 420
ctactggggc cagggaaccc tggtcaccgt ctcgagcggt ggaggcggtt caggcggagg 480
tggcagcggc ggtggcgggt cgacggacat ccagatgacc cagtctccat cctccctgtc 540
tgcatctgta ggagacagag tcaccatcac ttgccgggca agtcagagca ttagcagcta 600
tttaaattgg tatcagcaga aaccagggaa agcccctaag ctcctgatct atgctgcatc 660
cgctttgcaa agtggggtcc catcaaggtt cagtggcagt ggatctggga cagatttcac 720
tctcaccatc agcagtctgc aacctgaaga ttttgcaact tactactgtc aacagtatag 780
ttctagtcct tctacgttcg gccaagggac caaggtggaa atcaaacggg cggccgcaca 840
tcatcatcac catcacgggg ccgcagaaca aaaactcatc tcagaagagg atctgaatgg 900
ggccgcatag actgttgaaa gttgtttagc aaaacctcat acagaaaatt catttactaa 960
cgtctggaaa gacgacaaaa ctttaaatcg ttacgctaac 1000
MKYLLPTAAAGLLLLAAQPAMAEVQLLESGGGLVQPGGSLRLSCAASGFTFSSYAMSWVR 60
H−CDR2
QAPGKGLEWVSSIDSYGTNTDYADSVKGRFTISRDNSKNTLYLQMNSLRAEDTAVYYCAK 120
H−CDR3 −−−−−−−−−Link−−−−−−−−−−−
AFNSFDYWGQGTLVTVSSGGGGSGGGGSGGGGSTDIQMTQSPSSLSASVGDRVTITCRAS 180
L−CDR1 L−CDR2
QSISSYLNWYQQKPGKAPKLLIYAASALQSGVPSRFSGSGSGTDFTLTISSLQPEDFATY 240
L−CDR3 His−tag
YCQQYSSSPSTFGQGTKVEIKRAAAHHHHHHGAAEQKLISEEDLNGAA 288
本出願人は、この殺虫ペプチドを自らF2と命名した。
実施例1で選択された殺虫ペプチドを含有する上澄液を、体積比1:100で2×TY−AG液体培地10mlの中に移し、37℃で2時間培養し、力価1012のヘルパーファージKM13を100μl加えて救援し、30℃で2時間培養し、1800gで10分間遠心し、上澄液を除去し、2×TY−AK液体培地を用いて再懸濁して菌種を沈殿させ、30℃、250rpmで振盪し、一晩培養した。翌日、1800gで30分間遠心し、その上澄液をF2初代培養物を含有する上澄液とした。
(1)競合抑制ELISA測定試験
試験は、6個の試験群と対応する対照群に分け、それぞれ表1により溶液を調製した。
試験は、試験群1、試験群2、試験群3、陽性対照群、陰性対照群1、陰性対照群2、陰性対照群3に分け、試験の手順は次の通りとした。
(a)密封:5μg/mlのBBMVを、100μl/ウェルで96ウェルプレートの中に入れ、4℃で一晩置き、翌日、各ウェルをPBST 250μlで3回洗浄した後、それぞれ質量比3%のBSAを200μl加え、室温で2時間培養し、密封した。
(b)試料添加:ステップ1で密封した96ウェルプレートを、250μl/ウェルのPBSTで3回洗浄した後、それぞれ96ウェルプレートに表2により試料を添加した。
試験は、試験群と対照群に分けて行われた。
試験群は、実施例2で得られたF2初代培養物を含有する上澄液(F2)を用いた。
陽性対照群は、濃度0.2g/LのCry1Ab毒素(CK+)を用いた。
陰性対照群は、「β」タイプ以外のAnti−Id ScFvs(CK−)を用いた。
試験群、陽性対照群、陰性対照群を各10ml取り、滅菌したペトリ皿の中に入れ、それぞれイネの葉6枚およびキャベツの葉6枚を入れ、30分間浸し、取り出して陰干しした。コブノメイガ三齢幼虫およびコナガ三齢幼虫に、陰干しした葉を与えた。
Claims (5)
- ヌクレオチド配列が配列番号1で示されるヒト殺虫遺伝子。
- アミノ酸配列が配列番号2で示される請求項1に記載のヒト殺虫遺伝子にコードされた殺虫ペプチド。
- 請求項1に記載のヒト殺虫遺伝子を含有する原核細胞用ベクター。
- 請求項2に記載の殺虫ペプチドを含む殺虫剤又は農業害虫防除剤。
- 請求項2に記載の殺虫ペプチドを、農業害虫を防除するために使用する農業害虫防除方法。
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PCT/CN2015/070423 WO2016086513A1 (zh) | 2014-12-05 | 2015-01-09 | 一种人源杀虫基因及其编码杀虫肽与应用 |
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