JP4249483B2 - ビフィズス菌中のセルピン - Google Patents
ビフィズス菌中のセルピン Download PDFInfo
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- JP4249483B2 JP4249483B2 JP2002561500A JP2002561500A JP4249483B2 JP 4249483 B2 JP4249483 B2 JP 4249483B2 JP 2002561500 A JP2002561500 A JP 2002561500A JP 2002561500 A JP2002561500 A JP 2002561500A JP 4249483 B2 JP4249483 B2 JP 4249483B2
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- nucleic acid
- polypeptide
- microorganism
- serpin
- polypeptides
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Classifications
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- C07H21/00—Compounds containing two or more mononucleotide units having separate phosphate or polyphosphate groups linked by saccharide radicals of nucleoside groups, e.g. nucleic acids
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- C—CHEMISTRY; METALLURGY
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- C07K—PEPTIDES
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- C07K—PEPTIDES
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- C—CHEMISTRY; METALLURGY
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- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
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- 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
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- C12R—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
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Description
セルピン遺伝子の単離
蛍光自動シークエンサーで挿入クローンの配列を決定した後に定方向の配列を決定する方法によってビフィズス菌ロングム菌株BL29のゲノム配列を決定し、これらのヌクレオチド(挿入)断片の配列をソフトウェアプログラムで繋ぎ合わせている途上で、オープンリーディングフレームを発見した。これを確認するため、このゲノムの断片を作製し、適切なベクターに連結して増幅し増殖させて、対応する断片の配列を決定した。断片の重複部分及び最終配列、そのヌクレオチド配列を、適切なソフトウェアを利用して評価した。
(1)BLASTP:アミノ酸の問い合せ配列をタンパク質のアミノ酸配列データベースと照合する。
(2)BLASTN:ヌクレオチドの問い合せ配列をヌクレオチド配列データベースと照合する。
(3)BLASTX:全読み枠中の翻訳されるヌクレオチドの問い合せ配列をタンパク質のアミノ酸配列データベースと照合する。
(4)TBLASTN:タンパク質のアミノ酸の問い合せ配列を、読み枠すべてについて動的に翻訳されたヌクレオチド配列データベースと照合する。
ビフィズス菌由来のセルピン遺伝子のクローニング及びそのポリペプチドの単離
シグナルペプチドを除去したビフィズス菌由来セルピンと考えられる物質をコードする核酸を、大腸菌発現ベクターpDEST 17(Invitrogen Life Technologies)中にクローン化し、対応するタンパク質を、6−Hisで標識した融合タンパク質として大腸菌中で常法により産生させた(Janknecht R等(1991):Proc.Natl.Acad.Sci.USA:88(20)8972〜8976頁)。
BL29中で発現するセルピン様タンパク質の抗炎症活性能
セルピンとしての活性を測定するために、例2で単離したポリペプチドをインビトロでの溶血性のアッセイに使用した。
Claims (14)
- 配列番号1で示される核酸。
- 配列番号2で示されるポリペプチド。
- 請求項1に記載の核酸を含有するベクター。
- 請求項1に記載の核酸の1個若しくは複数のコピー、又は請求項3に記載のベクターを含有する形質転換もしくは形質導入した宿主細胞。
- 請求項2に記載のポリペプチドが発現される、請求項4に記載の宿主細胞。
- セリンプロテアーゼ活性が関連する生物学的プロセスに影響を及ぼす分子を同定し、その特性を明らかにし、及び/又はそれを精製するための、請求項1又は請求項2のいずれかに記載の核酸又はポリペプチドの使用。
- セリンプロテアーゼ活性が関与する疾患状態の治療及び診断用の分子を開発するための、請求項1又は請求項2のいずれかに記載の核酸又はポリペプチドの使用。
- セリンプロテアーゼ活性が関与する疾患状態の治療及び/又は予防用の担体を調製するための、請求項1に記載の核酸又は請求項2に記載のポリペプチドの使用。
- 担体が医薬品、食品、又は栄養補助食品である、請求項8に記載の使用。
- 生物学的プロセス又は疾患状態が、血液凝固、線維素溶解、免疫反応、補体の活性化、炎症反応、細胞外マトリックスの代謝回転、細胞移動、プロホルモンの活性化、癌の転移からなる群から選択される、請求項6から請求項9までのいずれかに記載の使用。
- 請求項1に記載の核酸又は請求項3に記載のベクターを適切な宿主中で発現させ、得られるポリペプチドを精製することを含む、請求項2に記載のポリペプチドの製造方法。
- 請求項1に記載の核酸又は請求項2に記載のポリペプチドに対する抗体で、微生物を、前記核酸又は前記ポリペプチドの存在についてスクリーニングすること、及び微生物中のセルピンの存在を決定することを含む、プロバイオティックス菌株の検出方法。
- 請求項1に記載の核酸によってコードされるセルピンを発現又は過剰発現する微生物の産生方法であって、請求項1に記載の核酸で微生物を形質転換すること、及びセルピンポリペプチドをコードする遺伝子を発現させることを含む上記方法。
- 請求項4若しくは請求項5のいずれかに記載の宿主細胞を含有する食品もしくは医薬品。
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US6737248B2 (en) * | 1996-01-05 | 2004-05-18 | Human Genome Sciences, Inc. | Staphylococcus aureus polynucleotides and sequences |
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