JP4396923B2 - ヒト好中球ゼラチナーゼ関連リポカリンおよび関連タンパク質の突然変異タンパク質 - Google Patents
ヒト好中球ゼラチナーゼ関連リポカリンおよび関連タンパク質の突然変異タンパク質 Download PDFInfo
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- JP4396923B2 JP4396923B2 JP2003532678A JP2003532678A JP4396923B2 JP 4396923 B2 JP4396923 B2 JP 4396923B2 JP 2003532678 A JP2003532678 A JP 2003532678A JP 2003532678 A JP2003532678 A JP 2003532678A JP 4396923 B2 JP4396923 B2 JP 4396923B2
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Description
実施例1:hNGAL突然変異タンパク質に関するライブラリーの産生
他に示さない限り、例えばSambrookら(上記)で記述されたような、当業者に知られた遺伝子工学的方法を使用した。
融合タンパク質としてリポカリン突然変異タンパク質のライブラリーをコードしているphNGAL5と同様のファスミドベクターを形質転換した細胞を含む、200mlの培養液を、無菌エルレンマイヤー(Erlenmeyer)フラスコに移した。およそ10の感染多重度にて、VCS−M13ヘルパーファージ(Stratagene)を感染させた後、培養液を、さらに30分間、37℃、160rpmにて振盪させた。カナマイシン(70μg/ml)を続いて加え、インキュベーター温度を30℃まで低下させ、10分後、遺伝子発現を誘導するために、無水テトラサイクリン(ACROS Organics)を100μg/l(ジメチルホルムアミド、DMF中100μg/mlの保存溶液を200μl)で加えた。インキュベーションを、30℃、160rpmにてさらに5時間続けた。
Strep−Tag(登録商標)IIおよびアルブミン結合ドメインを持つ融合タンパク質として、hNGAL突然変異タンパク質の分析的な産生、ならびにコロニースクリーニングによるその特徴解析のために、2つのBstXI開裂部位間の遺伝子カセットを、phNGAL7上の、ベクターphNGAL5からサブクローンした。
hNGALおよびその突然変異タンパク質の予備産生のために、1つの選択したコロニー、およびコントロールとしてphNGAL7上に本来コードされているhNGALを、大腸菌株TG1−F−中で産生させた。
実施例5:hNGAL突然変異タンパク質の、涙リポカリンに対する親和性の測定
ELISA(酵素免疫測定法(Enzyme−linked Immunosorbent Assay))における、結合の検出のために、マイクロタイタープレート(Micro Test III Flexible Assay Plate;Falcon)のウェルを、それぞれ、100μlの、PBST中HSAの20mg/ml溶液で満たし、室温(RT)にて1時間インキュベートした。PBSTで3回洗浄した後、50μlの、実施例3からのhNGAL突然変異タンパク質TlpcAおよびhNGALの精製融合タンパク質の1μM溶液を、タンパク質が、abdとHSAとの間の複合体形成を介して固定化されるように、ウェルを充たした。1時間後、溶液を除去し、PBSTにて3回洗浄した。ついで、PBST中の希釈系列を、140μg/mlで開始して、PBST中、涙リポカリンおよびビオチンの共役物で調製し(実施例3)、続いて室温にて1時間インキュベートした。PBSTで3回洗浄したのち、PBSTにて1:10000に希釈したアビジン−アルカリホスファターゼ共役物(Sigma)をウェルに満たした。室温にて1時間、インキュベーションを実施し、続いてPBSTで2回、PBSで2回洗浄した。したがって、固定化hNGAL突然変異タンパク質に結合した涙リポカリンの検出を、アルカリホスファターゼによって触媒される、p−ニトロフェニルホスフェートの加水分解を介して実施した。この目的のために、AP−緩衝液(100mM NaCl、5mM MgCl2、100mM Tris/HCl pH8.8)中の0.5mg/ml p−ニトロフェニルホスフェート(Amresco)の100μl溶液を、ウェル中に満たし、産物の形成を、SpectraMax250光度計(Molecular Devices)にて、405nmの吸収を測定することによってモニターした。
多様性の増した、hNGALのランダムライブラリーを、図2にしたがった多重段階でのPCRを用いて、4つのペプチドループにおける、合計20の選択したアミノ酸位置の協調的な突然変異誘発によって調製した。PCR反応を、第一増幅段階の両方で、100μlの容量で実施し、そこで、従来のホスホルアミダイト法にしたがって合成した、50pmolの各プライマー対(それぞれ、配列番号1および配列番号2、または配列番号3および配列番号4)とともに、10ng phNGAL5(図1)プラスミドDNAを鋳型として使用した。さらに、反応混合液は、10μlの10×Taq緩衝液(100mM Tris/HCl pH9.0、500mM KCl、15mM MgCl2、1%v/v Triton X−100)および10μl dNTP−Mix(2mM dATP、dCTP、dGTP、dTTP)を含んだ。水によって容量を満たした後、5uのTaq DNA−ポリメラーゼ(5u/μl、Promega)を加え、94℃で1分間、60℃で1分間、72℃で1.5分間の20温度サイクルを、ヒートリッド付サーモサイクラー(Eppendorf)にて実施し、ついで60℃にて5分間、最終インキュベーションした。所望の増幅産物を、それぞれの場合に、Jetsorb DNA抽出キット(Genomed)を用いて、GTQ Agarose(Roth)からのプレパラティブアガロースゲル電気泳動によって単離した。
phNGAL12に相当するファスミドベクターで形質転換した細胞を含むが、融合タンパク質としてリポカリン突然変異タンパク質のライブラリーをコードしている、1500mlの培養液に、およそ10の感染多重度にて、VCS−M13ヘルパーファージ(Stratagene)を感染させた。この培養液を、37℃、160rpmにてさらに30分間、振盪した。ついで、インキュベーターの温度を、26℃まで低下させ、カナマイシン(70μg/ml)を加えた。10分後、遺伝子発現を誘導するために、無水テトラサイクリンを、25μg/l(DMF中、20μg/mlの保存溶液、1875μl)で加えた。インキュベーションを、26℃、160rpmにて、さらに15時間続けた。
Strep−Tag(登録商標)IIとアルブミン結合ドメインとの融合タンパク質としての、hNGAL突然変異タンパク質の解析的産生のために、2つのBstXI開裂部位間の遺伝子カセットを、phNGAL7上のベクターphNGAL12よりサブクローン化した。
実施例9:hNGAL突然変異の産生
実施例8から得た、hNGAL突然変異タンパク質RFY−B、RFY−CおよびRFY−Eの予備産生のために、2つのBstXI開裂部位間の突然変異誘発コード領域を、発現プラスミドphNGAL15上のphNGAL7ベクターよりサブクローン化した(図7)。そのようにして得られたプラスミドは、アミノ末端にOmpAシグナル配列を、そしてカルボキシ末端にStrep−Tag(登録商標)IIアフィニティタグを持つ、突然変異タンパク質の融合タンパク質をコードしていた。
ELISA(酵素免疫測定法(Enzyme−linked Immunosorbent Assay))における結合の検出のために、マイクロタイタープレート(Maxisorb、Nunc)のウェルを、それぞれ、50μlのPBS中50μg/ml アビジン(Fluka)で充たし、室温(RT)にて一晩インキュベートした。PBSTにて3回洗浄した後、50μlの、PBST中のビオチン化トロンボスポンディンペプチド、配列番号18の1μM溶液でウェルを充たし、ペプチドを、ビオチンと先に吸着したアビジンとの間の複合体形成を介して固定化した。1時間のインキュベーションの後、この溶液を除去し、マイクロタイタープレートのウェルをPBSTにて3回洗浄した。非特異的結合部位を飽和させるために、ウェルを、100μlのPBST中4%w/vBSAで充たし、室温にて1時間インキュベートし、続いて、PBSTにて3回洗浄した。
実施例11:SPRを用いた、hNGAL突然変異タンパク質の、トロンボスポンディンペプチドに対する親和性の測定
hNGAL突然変異タンパク質の、トロンボスポンディンペプチド、配列番号18に対する結合親和性を、BIAcore Xシステム(BIACORE)を用いて、表面プラズモン共鳴(SPR)によって測定した。最初に、(DMF中200μg/mlペプチド溶液1μlを、150mM NaCl、10mM HEPES pH7.4、3mM EDTAを含むHBS緩衝液199μlと、混合することによって調製した)1μg/mlの濃度での、35μlのビオチン化トロンボスポンディンペプチドを、取扱説明書にしたがって、ストレプトアビジンでコートされたセンサーチップSA(BIACORE)の1つのフローチャンネルの表面に固定化し、約400応答ユニット(RU)を得た。ついで、hNGAL突然変異タンパク質の結合曲線を、500nM〜25nMの濃度でのHBS緩衝液中の、実施例9からのそれぞれの精製突然変異タンパク質、35μlを、ランニング緩衝液としてHBS−EP(0.005%界面活性剤P20を含むHBS)を用い、5μl/分の連続流速によって、測定した。
実施例12:ヒトインターロイキン−8(IL−8)に対するhNGAL突然変異タンパク質の選別
組換えヒトサイトカイン インターロイキン−8(Baggiolini and Clark−Lewis、FEBS Lett.397、(1992)、97−101;H2N−AVLPRSAKELRCQCIKTYSKPFHPKFIKELRVIESGPHCANTEIIVKLSDGRELCLDPKENWVQRVVEKFLKRAENS−COOH;配列番号29)を、ビオチン基と共役させ、ストレプトアビジンでコートされた常磁性粒子(Dynal)の存在下で、hNGAL突然変異タンパク質を提示しているファージミドのライブラリーからのアフィニティ濃縮のための標的として使用した。
実施例3で記述したように、Strep−Tag(登録商標)IIとアルブミン結合ドメインとの融合タンパク質としての、hNGAL突然変異タンパク質の解析的産生のために、2つのBstXI開裂部位間の遺伝子カセットを、phNGAL7上のベクターphNGAL12よりサブクローン化した。
実施例14:hNGAL突然変異タンパク質N4の産生
実施例13から得た、hNGAL突然変異タンパク質N4の予備産生のために、BstXIカセットを、phNGAL7中の変異体より単離し、発現プラスミドphNGAL15よりサブクローン化した(図7)。得られたプラスミドは、アミノ末端にOmpAシグナル配列を、そしてカルボキシ末端にStrep−Tag(登録商標)IIアフィニティタグを持つ、突然変異タンパク質N4の融合タンパク質をコードしている。
ELISAにおける結合の検出のために、96のマイクロタイタープレート(Maxisorb、Nunc)の2列(各12ウェル)を、50μlの、PBS中50μg/ml アビジン溶液(Fluka)で、4℃にて一晩コートした。PBSTにて3回洗浄した後、1つの列を、PBST中ビオチン化IL−8の1μM溶液、50μl/ウェルにて処理し、一方、第2の列は、コントロールとしてPBSTとともにインキュベートした。室温にて1時間後、すべてのウェルをPBSTにて3回洗浄し、非特異的結合部位を、100μlの、PBST中4%w/vスキムミルク粉末にて、室温で1時間、飽和させた。
組換えヒト腫瘍壊死因子α(TNFα、配列番号31、配列番号35)を、ビオチン基と共役させ、ストレプトアビジンでコートされた常磁性粒子(Dynal)の存在下で、実施例7で記述したように得られたhNGAL突然変異タンパク質を提示しているファージミドのライブラリーからのアフィニティ濃縮のための標的として使用した。
実施例3に記載のように、Strep−Tag(登録商標)IIおよびアルブミン結合ドメインを持つ融合タンパク質としてのhNGAL突然変異タンパク質を分析的に生産するために、2つのBstXI開裂部位間の遺伝子カセットを、phNGAL7上のベクターphNGAL12からサブクローン化した。
実施例18:「コロニースポットアッセイ」を用いた、TNFαに対する選択されたhNGAL突然変異タンパク質の結合活性の確認
コロニースポットアッセイは、形質転換細胞の懸濁液をプレートにスポットする代わりに、対応する発現プラスミドを持つ大腸菌の単一コロニーを、グリッドで印をつけた親水性膜上に、マスタープレートからスポットすることを除いては、実施例17で概略を述べたコロニースクリーニングアッセイと同様に行なった。それぞれのクローンを、LB/Amp寒天の培養プレート上においた親水性膜(Millipore、GVWP型、孔径0.22μm)上に4回または5回、滅菌した楊枝を用いてスポットした。37℃にて5時間、細胞を増殖させた。
Claims (14)
- ヒト好中球ゼラチナーゼ関連リポカリン(hNGAL)、ラットα2−マイクログロブリン関連タンパク質(A2m)およびマウス24p3/ウテロカリン(24p3)からなる群より選択したタンパク質の突然変異タンパク質を産生するための方法であって、前記突然変異タンパク質が所定の標的への検出可能な親和性を有し、前記方法が、hNGAL(配列番号:7)の配列位置40〜50、70〜79、101〜103、および125〜132に相当する1つ以上の配列位置においてタンパク質を突然変異誘発させ、その結果としてタンパク質の1つ以上の突然変異タンパク質(群)を生じる段階(a)を含む、方法。
- 所定の標的に対する結合親和性を有する、少なくとも1つの得られた突然変異タンパク質を、1つ以上の突然変異タンパク質から、前記少なくとも1つの突然変異タンパク質を選別および/または単離することによって濃縮する段階(b)をさらに含む、請求項1に記載の方法。
- 段階(a)での突然変異誘発によって、前記タンパク質の多数の突然変異タンパク質が生じる、請求項1または2に記載の方法。
- hNGAL(配列番号:7)の配列位置40、42、44、46、47、49、50、70、72、73、77、79、101、102、103、125、127、128、130および132に相当する1つ以上の配列位置において、タンパク質を突然変異誘発させる、請求項1〜3のいずれか1項に記載の方法。
- 前記タンパク質の1つ以上の突然変異タンパク質(群)をコードしている核酸(突然変異誘発によって生じる核酸)が、所定の標的の結合に関して、少なくとも1つの突然変異タンパク質を選択するために、M13−ファミリーの線状バクテリオファージのコートタンパク質pIIIまたはこのコートタンパク質の断片をコードしている遺伝子と、3’末端にて動作可能に融合している、請求項1〜4のいずれか1項に記載の方法。
- ヒト好中球ゼラチナーゼ関連リポカリン(hNGAL)、ラットα2−マイクログロブリン関連タンパク質(A2m)およびマウス24p3/ウテロカリン(24p3)に由来する突然変異タンパク質であって、前記突然変異タンパク質が、hNGAL(配列番号:7)の配列位置40〜50、70〜79、101〜103、および125〜132に相当する1つ以上の配列位置において突然変異を含み、所定の標的への検出可能な結合親和性を有する、突然変異タンパク質。
- 前記突然変異タンパク質が、hNGAL(配列番号:7)の配列位置40、42、44、46、47、49、50、70、72、73、77、79、101、102、103、125、127、128、130および132に相当する1つ以上の配列位置において突然変異を含む、請求項6に記載の突然変異タンパク質。
- Cys87が置換され、および/または、前記突然変異タンパク質が、hNGAL(配列番号:7)と比較して、1つ以上のアミノ酸置換Glu28→His、Thr145→Alaを有する、請求項6または7に記載のhNGALの突然変異タンパク質。
- 配列番号17、配列番号24、配列番号26、または配列番号28のアミノ酸配列を有する、請求項6または7に記載のhNGALの突然変異タンパク質。
- 有機分子、酵素標識、放射活性標識、蛍光標識、色素標識、ルミネセンス標識、ハプテン、ジゴキシゲニン、ビオチン、金属錯体、金属、および金コロイドからなる群より選択される標識に結合した、請求項6〜9のいずれか1項に記載の突然変異タンパク質。
- 請求項6〜10のいずれか1項に記載の、hNGAL、A2mまたは24p3の突然変異タンパク質を含む融合タンパク質であって、酵素、タンパク質もしくはタンパク質ドメイン、ペプチド、シグナル配列、および/またはアフィニティタグが、前記突然変異タンパク質のアミノ末端またはカルボキシ末端に動作可能に融合している、融合タンパク質。
- 請求項6〜11のいずれか1項に記載の、hNGAL、A2mもしくは24p3の突然変異タンパク質、またはその融合タンパク質をコードしている配列を含む、核酸分子。
- 請求項6〜11のいずれか1項に記載の、hNGAL、A2mもしくは24p3の突然変異タンパク質、またはその融合タンパク質を産生するための方法であって、前記突然変異タンパク質またはその融合タンパク質が、細菌または真核細胞の宿主生物中で、遺伝子工学的方法によって、突然変異タンパク質をコードしている核酸から開始して産生され、この宿主生物またはその培養液より単離される、方法。
- 請求項6〜11のいずれか1項に記載の、hNGAL、A2mもしくは24p3の突然変異タンパク質、またはその融合タンパク質の、所定の標的を検出するための使用であって、前記使用が、前記突然変異タンパク質を、好適な条件下で、所定の標的を含むと思われる試料と接触させ、それによって突然変異タンパク質と所定の標的との間の複合体の形成を可能にする段階と、好適なシグナルによって複合体突然変異タンパク質を測定する段階とを含む使用。
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ES2032831T5 (es) | 1986-08-19 | 2001-02-16 | Genentech Inc | Dispositivo y dispersion para suministro intrapulmonar de factores de crecimiento polipeptidos y citoquinas. |
CA2190502A1 (en) | 1994-05-18 | 1995-11-23 | Robert M. Platz | Methods and compositions for the dry powder formulation of interferons |
DE4417598A1 (de) | 1994-05-19 | 1995-12-14 | Max Planck Gesellschaft | Verwendung des Tetracyclinpromotors zur stringent regulierten Produktion von rekombinanten Proteinen in prokaryontischen Zellen |
AU5132096A (en) * | 1995-01-30 | 1996-08-21 | Terrapin Technologies, Inc. | Glubodies - multiplicities of proteins capable of binding a variety of small molecules |
DE19641876B4 (de) | 1996-10-10 | 2011-09-29 | Iba Gmbh | Streptavidinmuteine |
WO1998016873A1 (fr) | 1996-10-14 | 1998-04-23 | Firm Forsat Ltd. | Procede de preparation de dispersions a base de composants chromogenes |
DE19742706B4 (de) * | 1997-09-26 | 2013-07-25 | Pieris Proteolab Ag | Lipocalinmuteine |
DE19926068C1 (de) | 1999-06-08 | 2001-01-11 | Arne Skerra | Muteine des Bilin-Bindungsproteins |
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JP2005503829A (ja) | 2005-02-10 |
EP1430131A2 (en) | 2004-06-23 |
BRPI0212919B1 (pt) | 2017-05-30 |
DE60207740T2 (de) | 2006-08-10 |
CN1561394A (zh) | 2005-01-05 |
BR0212919A (pt) | 2004-10-13 |
AU2002337111B2 (en) | 2007-06-07 |
WO2003029463A2 (en) | 2003-04-10 |
BRPI0212919B8 (pt) | 2021-05-25 |
WO2003029462A1 (en) | 2003-04-10 |
CA2461571A1 (en) | 2003-04-10 |
DE60207740D1 (de) | 2006-01-05 |
ES2253561T3 (es) | 2006-06-01 |
CN1325644C (zh) | 2007-07-11 |
US7252998B2 (en) | 2007-08-07 |
EP1430131B1 (en) | 2005-11-30 |
WO2003029463A3 (en) | 2003-11-27 |
CA2461571C (en) | 2011-07-26 |
HK1067145A1 (en) | 2005-04-01 |
US20060088908A1 (en) | 2006-04-27 |
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